mod_cgid.c revision efd83d1dd1a25688a3093c5a542ae16bacef62dd
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* Licensed to the Apache Software Foundation (ASF) under one or more
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * contributor license agreements. See the NOTICE file distributed with
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * this work for additional information regarding copyright ownership.
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * The ASF licenses this file to You under the Apache License, Version 2.0
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * (the "License"); you may not use this file except in compliance with
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * the License. You may obtain a copy of the License at
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * http://www.apache.org/licenses/LICENSE-2.0
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Unless required by applicable law or agreed to in writing, software
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * distributed under the License is distributed on an "AS IS" BASIS,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * See the License for the specific language governing permissions and
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * limitations under the License.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/*
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * http_script: keeps all script-related ramblings together.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Compliant to cgi/1.1 spec
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Adapted by rst from original NCSA code by Rob McCool
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * custom error responses, and DOCUMENT_ROOT because we found it useful.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * It also adds SERVER_ADMIN - useful for scripts to know who to mail when
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * they fail.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_lib.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_strings.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_general.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_file_io.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_portable.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_buckets.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "apr_optional.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "apr_signal.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define APR_WANT_STRFUNC
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "apr_want.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
331e0914b4c54463a06069051f0245b4058a90c2nilgun#if APR_HAVE_SYS_SOCKET_H
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include <sys/socket.h>
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#if APR_HAVE_UNISTD_H
4d59c48d506af681afac46a88516e369495c1ae4nilgun#include <unistd.h>
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#if APR_HAVE_SYS_TYPES_H
4d59c48d506af681afac46a88516e369495c1ae4nilgun#include <sys/types.h>
4d59c48d506af681afac46a88516e369495c1ae4nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "util_filter.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "httpd.h"
4d59c48d506af681afac46a88516e369495c1ae4nilgun#include "http_config.h"
4d59c48d506af681afac46a88516e369495c1ae4nilgun#include "http_request.h"
4d59c48d506af681afac46a88516e369495c1ae4nilgun#include "http_core.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "http_protocol.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "http_main.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "http_log.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "util_script.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "ap_mpm.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "mpm_common.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "mod_suexec.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#include "../filters/mod_include.h"
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include "mod_core.h"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4d59c48d506af681afac46a88516e369495c1ae4nilgun/* ### should be tossed in favor of APR */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include <sys/stat.h>
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#include <sys/un.h> /* for sockaddr_un */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgunmodule AP_MODULE_DECLARE_DATA cgid_module;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgunstatic int cgid_start(apr_pool_t *p, server_rec *main_server, apr_proc_t *procnew);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgunstatic int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *main_server);
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic int handle_exec(include_ctx_t *ctx, ap_filter_t *f, apr_bucket_brigade *bb);
4d59c48d506af681afac46a88516e369495c1ae4nilgun
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgid_pfn_reg_with_ssi;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgid_pfn_gtv;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgid_pfn_ps;
4d59c48d506af681afac46a88516e369495c1ae4nilgun
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic apr_pool_t *pcgi = NULL;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic int total_modules = 0;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic pid_t daemon_pid;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic int daemon_should_exit = 0;
4d59c48d506af681afac46a88516e369495c1ae4nilgunstatic server_rec *root_server = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_pool_t *root_pool = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic const char *sockname;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic struct sockaddr_un *server_addr;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_socklen_t server_addr_len;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic pid_t parent_pid;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic ap_unix_identity_t empty_ugid = { (uid_t)-1, (gid_t)-1, -1 };
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* The APR other-child API doesn't tell us how the daemon exited
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * (SIGSEGV vs. exit(1)). The other-child maintenance function
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * needs to decide whether to restart the daemon after a failure
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * based on whether or not it exited due to a fatal startup error
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * or something that happened at steady-state. This exit status
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * is unlikely to collide with exit signals.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DAEMON_STARTUP_ERROR 254
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* Read and discard the data in the brigade produced by a CGI script */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic void discard_script_output(apr_bucket_brigade *bb);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* This doer will only ever be called when we are sure that we have
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * a valid ugid.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic ap_unix_identity_t *cgid_suexec_id_doer(const request_rec *r)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return (ap_unix_identity_t *)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_get_module_config(r->request_config, &cgid_module);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * in ScriptAliased directories, which means we need to know if this
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * request came through ScriptAlias or not... so the Alias module
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * leaves a note for us.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic int is_scriptaliased(request_rec *r)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony const char *t = apr_table_get(r->notes, "alias-forced-type");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return t && (!strcasecmp(t, "cgi-script"));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* Configuration stuff */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DEFAULT_LOGBYTES 10385760
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DEFAULT_BUFBYTES 1024
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DEFAULT_SOCKET DEFAULT_REL_RUNTIMEDIR "/cgisock"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define CGI_REQ 1
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define SSI_REQ 2
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define GETPID_REQ 3 /* get the pid of script created for prior request */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define ERRFN_USERDATA_KEY "CGIDCHILDERRFN"
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* DEFAULT_CGID_LISTENBACKLOG controls the max depth on the unix socket's
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * pending connection queue. If a bunch of cgi requests arrive at about
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * the same time, connections from httpd threads/processes will back up
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * in the queue while the cgid process slowly forks off a child to process
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * each connection on the unix socket. If the queue is too short, the
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * httpd process will get ECONNREFUSED when trying to connect.
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#ifndef DEFAULT_CGID_LISTENBACKLOG
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DEFAULT_CGID_LISTENBACKLOG 100
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* DEFAULT_CONNECT_ATTEMPTS controls how many times we'll try to connect
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * to the cgi daemon from the thread/process handling the cgi request.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Generally we want to retry when we get ECONNREFUSED since it is
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * probably because the listen queue is full. We need to try harder so
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * the client doesn't see it as a 503 error.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Set this to 0 to continually retry until the connect works or Apache
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * terminates.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#ifndef DEFAULT_CONNECT_ATTEMPTS
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#define DEFAULT_CONNECT_ATTEMPTS 15
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonytypedef struct {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony const char *logname;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony long logbytes;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int bufbytes;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony} cgid_server_conf;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonytypedef struct {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int req_type; /* request type (CGI_REQ, SSI_REQ, etc.) */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony unsigned long conn_id; /* connection id; daemon uses this as a hash value
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * to find the script pid when it is time for that
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * process to be cleaned up
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony pid_t ppid; /* sanity check for config problems leading to
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * wrong cgid socket use
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int core_module_index;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int env_count;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_unix_identity_t ugid;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_size_t filename_len;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_size_t argv0_len;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_size_t uri_len;
331e0914b4c54463a06069051f0245b4058a90c2nilgun apr_size_t args_len;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int loglevel; /* to stuff in server_rec */
331e0914b4c54463a06069051f0245b4058a90c2nilgun} cgid_req_t;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun/* This routine is called to create the argument list to be passed
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * to the CGI script. When suexec is enabled, the suexec path, user, and
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * group are the first three arguments to be passed; if not, all three
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * must be NULL. The query info is split into separate arguments, where
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * "+" is the separator between keyword arguments.
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun *
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * Do not process the args if they containing an '=' assignment.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic char **create_argv(apr_pool_t *p, char *path, char *user, char *group,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun char *av0, const char *args)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int x, numwords;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun char **av;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony char *w;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int idx = 0;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (!(*args) || ap_strchr_c(args, '=')) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony numwords = 0;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* count the number of keywords */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony for (x = 0, numwords = 1; args[x]; x++) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (args[x] == '+') {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ++numwords;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (numwords > APACHE_ARG_MAX - 5) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony numwords = APACHE_ARG_MAX - 5; /* Truncate args to prevent overrun */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av = (char **) apr_pcalloc(p, (numwords + 5) * sizeof(char *));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (path) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx++] = path;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (user) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx++] = user;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (group) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx++] = group;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx++] = apr_pstrdup(p, av0);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony for (x = 1; x <= numwords; x++) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony w = ap_getword_nulls(p, &args, '+');
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_unescape_url(w);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx++] = ap_escape_shell_cmd(p, w);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony av[idx] = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return av;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#if APR_HAS_OTHER_CHILD
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic void cgid_maint(int reason, void *data, apr_wait_t status)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_proc_t *proc = data;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int mpm_state;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int stopping;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony switch (reason) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony case APR_OC_REASON_DEATH:
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_proc_other_child_unregister(data);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* If apache is not terminating or restarting,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * restart the cgid daemon
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stopping = 1; /* if MPM doesn't support query,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * assume we shouldn't restart daemon
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state) == APR_SUCCESS &&
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun mpm_state != AP_MPMQ_STOPPING) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stopping = 0;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (!stopping) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (status == DAEMON_STARTUP_ERROR) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "cgid daemon failed to initialize");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "cgid daemon process died, restarting");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cgid_start(root_pool, root_server, proc);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun break;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun case APR_OC_REASON_RESTART:
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* don't do anything; server is stopping or restarting */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_proc_other_child_unregister(data);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony break;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony case APR_OC_REASON_LOST:
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Restart the child cgid daemon process */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_proc_other_child_unregister(data);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cgid_start(root_pool, root_server, proc);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony break;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony case APR_OC_REASON_UNREGISTER:
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* we get here when pcgi is cleaned up; pcgi gets cleaned
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * up when pconf gets cleaned up
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony kill(proc->pid, SIGHUP); /* send signal to daemon telling it to die */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Remove the cgi socket, we must do it here in order to try and
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * guarantee the same permissions as when the socket was created.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (unlink(sockname) < 0 && errno != ENOENT) {
ff11394b10b5608991f43efb5308193b6d6001dfnilgun ap_log_error(APLOG_MARK, APLOG_ERR, errno, NULL,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun "Couldn't unlink unix domain socket %s",
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sockname);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun break;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgunstatic apr_status_t close_unix_socket(void *thefd)
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun{
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun int fd = (int)((long)thefd);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
ff11394b10b5608991f43efb5308193b6d6001dfnilgun return close(fd);
ff11394b10b5608991f43efb5308193b6d6001dfnilgun}
ff11394b10b5608991f43efb5308193b6d6001dfnilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* deal with incomplete reads and signals
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * assume you really have to read buf_size bytes
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_status_t sock_read(int fd, void *vbuf, size_t buf_size)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony char *buf = vbuf;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int rc;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony size_t bytes_read = 0;
331e0914b4c54463a06069051f0245b4058a90c2nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun do {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony do {
331e0914b4c54463a06069051f0245b4058a90c2nilgun rc = read(fd, buf + bytes_read, buf_size - bytes_read);
331e0914b4c54463a06069051f0245b4058a90c2nilgun } while (rc < 0 && errno == EINTR);
331e0914b4c54463a06069051f0245b4058a90c2nilgun switch(rc) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun case -1:
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return errno;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun case 0: /* unexpected */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return ECONNRESET;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun default:
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun bytes_read += rc;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony } while (bytes_read < buf_size);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return APR_SUCCESS;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony/* deal with signals
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_status_t sock_write(int fd, const void *buf, size_t buf_size)
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int rc;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun do {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun rc = write(fd, buf, buf_size);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony } while (rc < 0 && errno == EINTR);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (rc < 0) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return errno;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return APR_SUCCESS;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_status_t sock_writev(int fd, request_rec *r, int count, ...)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony va_list ap;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun int rc;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony struct iovec *vec;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int i;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun int total_bytes = 0;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony vec = (struct iovec *)apr_palloc(r->pool, count * sizeof(struct iovec));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun va_start(ap, count);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun for (i = 0; i < count; i++) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun vec[i].iov_base = va_arg(ap, caddr_t);
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun vec[i].iov_len = va_arg(ap, apr_size_t);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun total_bytes += vec[i].iov_len;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun va_end(ap);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony do {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun rc = writev(fd, vec, count);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony } while (rc < 0 && errno == EINTR);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (rc < 0) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return errno;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return APR_SUCCESS;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun}
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cgid_req_t *req)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int i;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony char **environ;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony core_request_config *temp_core;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony void **rconf;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_status_t stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun r->server = apr_pcalloc(r->pool, sizeof(server_rec));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* read the request header */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = sock_read(fd, req, sizeof(*req));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (stat != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
331e0914b4c54463a06069051f0245b4058a90c2nilgun r->server->log.level = req->loglevel;
331e0914b4c54463a06069051f0245b4058a90c2nilgun if (req->req_type == GETPID_REQ) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* no more data sent for this request */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return APR_SUCCESS;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* handle module indexes and such */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony rconf = (void **) apr_pcalloc(r->pool, sizeof(void *) * (total_modules + DYNAMIC_MODULE_LIMIT));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun temp_core = (core_request_config *)apr_palloc(r->pool, sizeof(core_module));
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun rconf[req->core_module_index] = (void *)temp_core;
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun r->request_config = (ap_conf_vector_t *)rconf;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_set_module_config(r->request_config, &cgid_module, (void *)&req->ugid);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Read the filename, argv0, uri, and args */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun r->filename = apr_pcalloc(r->pool, req->filename_len + 1);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *argv0 = apr_pcalloc(r->pool, req->argv0_len + 1);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->uri = apr_pcalloc(r->pool, req->uri_len + 1);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((stat = sock_read(fd, r->filename, req->filename_len)) != APR_SUCCESS ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony (stat = sock_read(fd, *argv0, req->argv0_len)) != APR_SUCCESS ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony (stat = sock_read(fd, r->uri, req->uri_len)) != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return stat;
331e0914b4c54463a06069051f0245b4058a90c2nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->args = apr_pcalloc(r->pool, req->args_len + 1); /* empty string if no args */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (req->args_len) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((stat = sock_read(fd, r->args, req->args_len)) != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun /* read the environment variables */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony environ = apr_pcalloc(r->pool, (req->env_count + 2) *sizeof(char *));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony for (i = 0; i < req->env_count; i++) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_size_t curlen;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((stat = sock_read(fd, &curlen, sizeof(curlen))) != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return stat;
ec0d09e3c3fd3a63139d7a68205418e1591454danilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony environ[i] = apr_pcalloc(r->pool, curlen + 1);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((stat = sock_read(fd, environ[i], curlen)) != APR_SUCCESS) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return stat;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony *env = environ;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#if 0
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#ifdef RLIMIT_CPU
331e0914b4c54463a06069051f0245b4058a90c2nilgun sock_read(fd, &j, sizeof(int));
331e0914b4c54463a06069051f0245b4058a90c2nilgun if (j) {
331e0914b4c54463a06069051f0245b4058a90c2nilgun temp_core->limit_cpu = (struct rlimit *)apr_palloc (sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sock_read(fd, temp_core->limit_cpu, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony temp_core->limit_cpu = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun#if defined (RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun sock_read(fd, &j, sizeof(int));
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun if (j) {
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun temp_core->limit_mem = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sock_read(fd, temp_core->limit_mem, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun temp_core->limit_mem = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#ifdef RLIMIT_NPROC
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sock_read(fd, &j, sizeof(int));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (j) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony temp_core->limit_nproc = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sock_read(fd, temp_core->limit_nproc, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun else {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun temp_core->limit_nproc = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return APR_SUCCESS;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun int req_type)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int i;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cgid_req_t req = {0};
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_status_t stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_unix_identity_t * ugid = ap_run_get_suexec_identity(r);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (ugid == NULL) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.ugid = empty_ugid;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony } else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony memcpy(&req.ugid, ugid, sizeof(ap_unix_identity_t));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.req_type = req_type;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.ppid = parent_pid;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.conn_id = r->connection->id;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun req.core_module_index = core_module.module_index;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun for (req.env_count = 0; env[req.env_count]; req.env_count++) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony continue;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.filename_len = strlen(r->filename);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.argv0_len = strlen(argv0);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.uri_len = strlen(r->uri);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.args_len = r->args ? strlen(r->args) : 0;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony req.loglevel = r->server->log.level;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun /* Write the request header */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (req.args_len) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_writev(fd, r, 5,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony &req, sizeof(req),
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->filename, req.filename_len,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun argv0, req.argv0_len,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun r->uri, req.uri_len,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->args, req.args_len);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony } else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = sock_writev(fd, r, 4,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun &req, sizeof(req),
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->filename, req.filename_len,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony argv0, req.argv0_len,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->uri, req.uri_len);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (stat != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun /* write the environment variables */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun for (i = 0; i < req.env_count; i++) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_size_t curlen = strlen(env[i]);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((stat = sock_writev(fd, r, 2, &curlen, sizeof(curlen),
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony env[i], curlen)) != APR_SUCCESS) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return stat;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#if 0
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#ifdef RLIMIT_CPU
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (conf->limit_cpu) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun len = 1;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, &len, sizeof(int));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, conf->limit_cpu, sizeof(struct rlimit));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun else {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun len = 0;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, &len, sizeof(int));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (conf->limit_mem) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony len = 1;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = sock_write(fd, &len, sizeof(int));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = sock_write(fd, conf->limit_mem, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony len = 0;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = sock_write(fd, &len, sizeof(int));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#ifdef RLIMIT_NPROC
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (conf->limit_nproc) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony len = 1;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, &len, sizeof(int));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, conf->limit_nproc, sizeof(struct rlimit));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun else {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun len = 0;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun stat = sock_write(fd, &len, sizeof(int));
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#endif
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return APR_SUCCESS;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic void daemon_signal_handler(int sig)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (sig == SIGHUP) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun ++daemon_should_exit;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic void cgid_child_errfn(apr_pool_t *pool, apr_status_t err,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun const char *description)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun request_rec *r;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony void *vr;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
331e0914b4c54463a06069051f0245b4058a90c2nilgun apr_pool_userdata_get(&vr, ERRFN_USERDATA_KEY, pool);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun r = vr;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* sure we got r, but don't call ap_log_rerror() because we don't
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * have r->headers_in and possibly other storage referenced by
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * ap_log_rerror()
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun ap_log_error(APLOG_MARK, APLOG_ERR, err, r->server, "%s", description);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony}
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctonystatic int cgid_server(void *data)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony{
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int sd, sd2, rc;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun mode_t omask;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_pool_t *ptrans;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun server_rec *main_server = data;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_hash_t *script_hash = apr_hash_make(pcgi);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_status_t rv;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_pool_create(&ptrans, pcgi);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_signal(SIGCHLD, SIG_IGN);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_signal(SIGHUP, daemon_signal_handler);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Close our copy of the listening sockets */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_close_listeners();
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* cgid should use its own suexec doer */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_hook_get_suexec_identity(cgid_suexec_id_doer, NULL, NULL,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun APR_HOOK_REALLY_FIRST);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_hook_sort_all();
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Couldn't create unix domain socket");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return errno;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun omask = umask(0077); /* so that only Apache can use socket */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun rc = bind(sd, (struct sockaddr *)server_addr, server_addr_len);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun umask(omask); /* can't fail, so can't clobber errno */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (rc < 0) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Couldn't bind unix domain socket %s",
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sockname);
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun return errno;
a7f7b4fafb3773005d3126f003cff159c03e72a0nilgun }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Not all flavors of unix use the current umask for AF_UNIX perms */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony rv = apr_file_perms_set(sockname, APR_FPROT_UREAD|APR_FPROT_UWRITE|APR_FPROT_UEXECUTE);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (rv != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_CRIT, rv, main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Couldn't set permissions on unix domain socket %s",
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony sockname);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return rv;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
331e0914b4c54463a06069051f0245b4058a90c2nilgun if (listen(sd, DEFAULT_CGID_LISTENBACKLOG) < 0) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Couldn't listen on unix domain socket");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return errno;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (!geteuid()) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (chown(sockname, ap_unixd_config.user_id, -1) < 0) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun "Couldn't change owner of unix domain socket %s",
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun sockname);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun return errno;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_pool_cleanup_register(pcgi, (void *)((long)sd),
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony close_unix_socket, close_unix_socket);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* if running as root, switch to configured user/group */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if ((rc = ap_run_drop_privileges(pcgi, ap_server_conf)) != 0) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony return rc;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony while (!daemon_should_exit) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony int errfileno = STDERR_FILENO;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony char *argv0 = NULL;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun char **env = NULL;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun const char * const *argv;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_int32_t in_pipe;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_int32_t out_pipe;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_int32_t err_pipe;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_cmdtype_e cmd_type;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun request_rec *r;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_procattr_t *procattr = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_proc_t *procnew = NULL;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_file_t *inout;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cgid_req_t cgid_req;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_status_t stat;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony void *key;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_socklen_t len;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony struct sockaddr_un unix_addr;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_pool_clear(ptrans);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony len = sizeof(unix_addr);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun sd2 = accept(sd, (struct sockaddr *)&unix_addr, &len);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (sd2 < 0) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun#if defined(ENETDOWN)
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (errno == ENETDOWN) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* The network has been shut down, no need to continue. Die gracefully */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ++daemon_should_exit;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony#endif
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (errno != EINTR) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, errno,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony (server_rec *)data,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Error accepting on cgid socket");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun continue;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r = apr_pcalloc(ptrans, sizeof(request_rec));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony procnew = apr_pcalloc(ptrans, sizeof(*procnew));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony r->pool = ptrans;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony stat = get_req(sd2, r, &argv0, &env, &cgid_req);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (stat != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, stat,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Error reading request on cgid socket");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony close(sd2);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony continue;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (cgid_req.ppid != parent_pid) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_CRIT, 0, main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "CGI request received from wrong server instance; "
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "see ScriptSock directive");
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony close(sd2);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony continue;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (cgid_req.req_type == GETPID_REQ) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun pid_t pid;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_status_t rv;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony pid = (pid_t)((long)apr_hash_get(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id)));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony rv = sock_write(sd2, &pid, sizeof(pid));
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (rv != APR_SUCCESS) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_log_error(APLOG_MARK, APLOG_ERR, rv,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony main_server,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony "Error writing pid %" APR_PID_T_FMT " to handler", pid);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony close(sd2);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony continue;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_os_file_put(&r->server->error_log, &errfileno, 0, r->pool);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony apr_os_file_put(&inout, &sd2, 0, r->pool);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun if (cgid_req.req_type == SSI_REQ) {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun in_pipe = APR_NO_PIPE;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun out_pipe = APR_FULL_BLOCK;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun err_pipe = APR_NO_PIPE;
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun cmd_type = APR_SHELLCMD;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony else {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony in_pipe = APR_CHILD_BLOCK;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony out_pipe = APR_CHILD_BLOCK;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony err_pipe = APR_CHILD_BLOCK;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony cmd_type = APR_PROGRAM;
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony }
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony if (((rc = apr_procattr_create(&procattr, ptrans)) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((cgid_req.req_type == CGI_REQ) &&
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun (((rc = apr_procattr_io_set(procattr,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun in_pipe,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun out_pipe,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun err_pipe)) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* XXX apr_procattr_child_*_set() is creating an unnecessary
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * pipe between this process and the child being created...
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * It is cleaned up with the temporary pool for this request.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_child_err_set(procattr, r->server->error_log, NULL)) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_child_in_set(procattr, inout, NULL)) != APR_SUCCESS))) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_child_out_set(procattr, inout, NULL)) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_dir_set(procattr,
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ap_make_dirstr_parent(r->pool, r->filename))) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_cmdtype_set(procattr, cmd_type)) != APR_SUCCESS) ||
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony ((rc = apr_procattr_child_errfn_set(procattr, cgid_child_errfn)) != APR_SUCCESS)) {
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony /* Something bad happened, tell the world.
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * ap_log_rerror() won't work because the header table used by
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * ap_log_rerror() hasn't been replicated in the phony r
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server,
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun "couldn't set child process attributes: %s", r->filename);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun procnew->pid = 0; /* no process to clean up */
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun close(sd2);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun }
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun else {
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun apr_pool_userdata_set(r, ERRFN_USERDATA_KEY, apr_pool_cleanup_null, ptrans);
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun argv = (const char * const *)create_argv(r->pool, NULL, NULL, NULL, argv0, r->args);
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun /* We want to close sd2 for the new CGI process too.
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * If it is left open it'll make ap_pass_brigade() block
243722a207c664dc2c62388a2095b1cba1fea3f0nilgun * waiting for EOF if CGI forked something running long.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * close(sd2) here should be okay, as CGI channel
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * is already dup()ed by apr_procattr_child_{in,out}_set()
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony * above.
4a7be288e6fc28a6cb940e26542dbf574bc907b9pctony */
close(sd2);
if (memcmp(&empty_ugid, &cgid_req.ugid, sizeof(empty_ugid))) {
/* We have a valid identity, and can be sure that
* cgid_suexec_id_doer will return a valid ugid
*/
rc = ap_os_create_privileged_process(r, procnew, argv0, argv,
(const char * const *)env,
procattr, ptrans);
} else {
rc = apr_proc_create(procnew, argv0, argv,
(const char * const *)env,
procattr, ptrans);
}
if (rc != APR_SUCCESS) {
/* Bad things happened. Everyone should have cleaned up.
* ap_log_rerror() won't work because the header table used by
* ap_log_rerror() hasn't been replicated in the phony r
*/
ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server,
"couldn't create child process: %d: %s", rc,
apr_filepath_name_get(r->filename));
procnew->pid = 0; /* no process to clean up */
}
}
/* If the script process was created, remember the pid for
* later cleanup. If the script process wasn't created, clear
* out any prior pid with the same key.
*
* We don't want to leak storage for the key, so only allocate
* a key if the key doesn't exist yet in the hash; there are
* only a limited number of possible keys (one for each
* possible thread in the server), so we can allocate a copy
* of the key the first time a thread has a cgid request.
* Note that apr_hash_set() only uses the storage passed in
* for the key if it is adding the key to the hash for the
* first time; new key storage isn't needed for replacing the
* existing value of a key.
*/
if (apr_hash_get(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id))) {
key = &cgid_req.conn_id;
}
else {
key = apr_pcalloc(pcgi, sizeof(cgid_req.conn_id));
memcpy(key, &cgid_req.conn_id, sizeof(cgid_req.conn_id));
}
apr_hash_set(script_hash, key, sizeof(cgid_req.conn_id),
(void *)((long)procnew->pid));
}
return -1; /* should be <= 0 to distinguish from startup errors */
}
static int cgid_start(apr_pool_t *p, server_rec *main_server,
apr_proc_t *procnew)
{
daemon_should_exit = 0; /* clear setting from previous generation */
if ((daemon_pid = fork()) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
"mod_cgid: Couldn't spawn cgid daemon process");
return DECLINED;
}
else if (daemon_pid == 0) {
if (pcgi == NULL) {
apr_pool_create(&pcgi, p);
}
exit(cgid_server(main_server) > 0 ? DAEMON_STARTUP_ERROR : -1);
}
procnew->pid = daemon_pid;
procnew->err = procnew->in = procnew->out = NULL;
apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
#if APR_HAS_OTHER_CHILD
apr_proc_other_child_register(procnew, cgid_maint, procnew, NULL, p);
#endif
return OK;
}
static int cgid_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp)
{
sockname = ap_append_pid(pconf, DEFAULT_SOCKET, ".");
return OK;
}
static int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp,
server_rec *main_server)
{
apr_proc_t *procnew = NULL;
int first_time = 0;
const char *userdata_key = "cgid_init";
module **m;
int ret = OK;
void *data;
root_server = main_server;
root_pool = p;
apr_pool_userdata_get(&data, userdata_key, main_server->process->pool);
if (!data) {
first_time = 1;
procnew = apr_pcalloc(main_server->process->pool, sizeof(*procnew));
procnew->pid = -1;
procnew->err = procnew->in = procnew->out = NULL;
apr_pool_userdata_set((const void *)procnew, userdata_key,
apr_pool_cleanup_null, main_server->process->pool);
}
else {
procnew = data;
}
if (!first_time) {
total_modules = 0;
for (m = ap_preloaded_modules; *m != NULL; m++)
total_modules++;
parent_pid = getpid();
sockname = ap_server_root_relative(p, sockname);
server_addr_len = APR_OFFSETOF(struct sockaddr_un, sun_path) + strlen(sockname);
server_addr = (struct sockaddr_un *)apr_palloc(p, server_addr_len + 1);
server_addr->sun_family = AF_UNIX;
strcpy(server_addr->sun_path, sockname);
ret = cgid_start(p, main_server, procnew);
if (ret != OK ) {
return ret;
}
cgid_pfn_reg_with_ssi = APR_RETRIEVE_OPTIONAL_FN(ap_register_include_handler);
cgid_pfn_gtv = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_get_tag_and_value);
cgid_pfn_ps = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_parse_string);
if ((cgid_pfn_reg_with_ssi) && (cgid_pfn_gtv) && (cgid_pfn_ps)) {
/* Required by mod_include filter. This is how mod_cgid registers
* with mod_include to provide processing of the exec directive.
*/
cgid_pfn_reg_with_ssi("exec", handle_exec);
}
}
return ret;
}
static void *create_cgid_config(apr_pool_t *p, server_rec *s)
{
cgid_server_conf *c =
(cgid_server_conf *) apr_pcalloc(p, sizeof(cgid_server_conf));
c->logname = NULL;
c->logbytes = DEFAULT_LOGBYTES;
c->bufbytes = DEFAULT_BUFBYTES;
return c;
}
static void *merge_cgid_config(apr_pool_t *p, void *basev, void *overridesv)
{
cgid_server_conf *base = (cgid_server_conf *) basev, *overrides = (cgid_server_conf *) overridesv;
return overrides->logname ? overrides : base;
}
static const char *set_scriptlog(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf = ap_get_module_config(s->module_config,
&cgid_module);
conf->logname = ap_server_root_relative(cmd->pool, arg);
if (!conf->logname) {
return apr_pstrcat(cmd->pool, "Invalid ScriptLog path ",
arg, NULL);
}
return NULL;
}
static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf = ap_get_module_config(s->module_config,
&cgid_module);
conf->logbytes = atol(arg);
return NULL;
}
static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy, const char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf = ap_get_module_config(s->module_config,
&cgid_module);
conf->bufbytes = atoi(arg);
return NULL;
}
static const char *set_script_socket(cmd_parms *cmd, void *dummy, const char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
/* Make sure the pid is appended to the sockname */
sockname = ap_append_pid(cmd->pool, arg, ".");
sockname = ap_server_root_relative(cmd->pool, sockname);
if (!sockname) {
return apr_pstrcat(cmd->pool, "Invalid ScriptSock path",
arg, NULL);
}
return NULL;
}
static const command_rec cgid_cmds[] =
{
AP_INIT_TAKE1("ScriptLog", set_scriptlog, NULL, RSRC_CONF,
"the name of a log for script debugging info"),
AP_INIT_TAKE1("ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF,
"the maximum length (in bytes) of the script debug log"),
AP_INIT_TAKE1("ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF,
"the maximum size (in bytes) to record of a POST request"),
AP_INIT_TAKE1("ScriptSock", set_script_socket, NULL, RSRC_CONF,
"the name of the socket to use for communication with "
"the cgi daemon."),
{NULL}
};
static int log_scripterror(request_rec *r, cgid_server_conf * conf, int ret,
apr_status_t rv, char *error)
{
apr_file_t *f = NULL;
struct stat finfo;
char time_str[APR_CTIME_LEN];
int log_flags = rv ? APLOG_ERR : APLOG_ERR;
ap_log_rerror(APLOG_MARK, log_flags, rv, r,
"%s: %s", error, r->filename);
/* XXX Very expensive mainline case! Open, then getfileinfo! */
if (!conf->logname ||
((stat(conf->logname, &finfo) == 0)
&& (finfo.st_size > conf->logbytes)) ||
(apr_file_open(&f, conf->logname,
APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) {
return ret;
}
/* "%% [Wed Jun 19 10:53:21 1996] GET /cgid-bin/printenv HTTP/1.0" */
apr_ctime(time_str, apr_time_now());
apr_file_printf(f, "%%%% [%s] %s %s%s%s %s\n", time_str, r->method, r->uri,
r->args ? "?" : "", r->args ? r->args : "", r->protocol);
/* "%% 500 /usr/local/apache/cgid-bin */
apr_file_printf(f, "%%%% %d %s\n", ret, r->filename);
apr_file_printf(f, "%%error\n%s\n", error);
apr_file_close(f);
return ret;
}
static int log_script(request_rec *r, cgid_server_conf * conf, int ret,
char *dbuf, const char *sbuf, apr_bucket_brigade *bb,
apr_file_t *script_err)
{
const apr_array_header_t *hdrs_arr = apr_table_elts(r->headers_in);
const apr_table_entry_t *hdrs = (apr_table_entry_t *) hdrs_arr->elts;
char argsbuffer[HUGE_STRING_LEN];
apr_file_t *f = NULL;
apr_bucket *e;
const char *buf;
apr_size_t len;
apr_status_t rv;
int first;
int i;
struct stat finfo;
char time_str[APR_CTIME_LEN];
/* XXX Very expensive mainline case! Open, then getfileinfo! */
if (!conf->logname ||
((stat(conf->logname, &finfo) == 0)
&& (finfo.st_size > conf->logbytes)) ||
(apr_file_open(&f, conf->logname,
APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) {
/* Soak up script output */
discard_script_output(bb);
if (script_err) {
while (apr_file_gets(argsbuffer, HUGE_STRING_LEN,
script_err) == APR_SUCCESS)
continue;
}
return ret;
}
/* "%% [Wed Jun 19 10:53:21 1996] GET /cgid-bin/printenv HTTP/1.0" */
apr_ctime(time_str, apr_time_now());
apr_file_printf(f, "%%%% [%s] %s %s%s%s %s\n", time_str, r->method, r->uri,
r->args ? "?" : "", r->args ? r->args : "", r->protocol);
/* "%% 500 /usr/local/apache/cgid-bin" */
apr_file_printf(f, "%%%% %d %s\n", ret, r->filename);
apr_file_puts("%request\n", f);
for (i = 0; i < hdrs_arr->nelts; ++i) {
if (!hdrs[i].key)
continue;
apr_file_printf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
}
if ((r->method_number == M_POST || r->method_number == M_PUT)
&& *dbuf) {
apr_file_printf(f, "\n%s\n", dbuf);
}
apr_file_puts("%response\n", f);
hdrs_arr = apr_table_elts(r->err_headers_out);
hdrs = (const apr_table_entry_t *) hdrs_arr->elts;
for (i = 0; i < hdrs_arr->nelts; ++i) {
if (!hdrs[i].key)
continue;
apr_file_printf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
}
if (sbuf && *sbuf)
apr_file_printf(f, "%s\n", sbuf);
first = 1;
for (e = APR_BRIGADE_FIRST(bb);
e != APR_BRIGADE_SENTINEL(bb);
e = APR_BUCKET_NEXT(e))
{
if (APR_BUCKET_IS_EOS(e)) {
break;
}
rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS || (len == 0)) {
break;
}
if (first) {
apr_file_puts("%stdout\n", f);
first = 0;
}
apr_file_write(f, buf, &len);
apr_file_puts("\n", f);
}
if (script_err) {
if (apr_file_gets(argsbuffer, HUGE_STRING_LEN,
script_err) == APR_SUCCESS) {
apr_file_puts("%stderr\n", f);
apr_file_puts(argsbuffer, f);
while (apr_file_gets(argsbuffer, HUGE_STRING_LEN,
script_err) == APR_SUCCESS)
apr_file_puts(argsbuffer, f);
apr_file_puts("\n", f);
}
}
if (script_err) {
apr_file_close(script_err);
}
apr_file_close(f);
return ret;
}
static int connect_to_daemon(int *sdptr, request_rec *r,
cgid_server_conf *conf)
{
int sd;
int connect_tries;
apr_interval_time_t sliding_timer;
connect_tries = 0;
sliding_timer = 100000; /* 100 milliseconds */
while (1) {
++connect_tries;
if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,
"unable to create socket to cgi daemon");
}
if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {
if (errno == ECONNREFUSED && connect_tries < DEFAULT_CONNECT_ATTEMPTS) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, errno, r,
"connect #%d to cgi daemon failed, sleeping before retry",
connect_tries);
close(sd);
apr_sleep(sliding_timer);
if (sliding_timer < apr_time_from_sec(2)) {
sliding_timer *= 2;
}
}
else {
close(sd);
return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, errno,
"unable to connect to cgi daemon after multiple tries");
}
}
else {
apr_pool_cleanup_register(r->pool, (void *)((long)sd),
close_unix_socket, apr_pool_cleanup_null);
break; /* we got connected! */
}
/* gotta try again, but make sure the cgid daemon is still around */
if (kill(daemon_pid, 0) != 0) {
return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, errno,
"cgid daemon is gone; is Apache terminating?");
}
}
*sdptr = sd;
return OK;
}
static void discard_script_output(apr_bucket_brigade *bb)
{
apr_bucket *e;
const char *buf;
apr_size_t len;
apr_status_t rv;
for (e = APR_BRIGADE_FIRST(bb);
e != APR_BRIGADE_SENTINEL(bb);
e = APR_BUCKET_NEXT(e))
{
if (APR_BUCKET_IS_EOS(e)) {
break;
}
rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
break;
}
}
}
/****************************************************************
*
* Actual cgid handling...
*/
struct cleanup_script_info {
request_rec *r;
unsigned long conn_id;
cgid_server_conf *conf;
};
static apr_status_t dead_yet(pid_t pid, apr_interval_time_t max_wait)
{
apr_interval_time_t interval = 10000; /* 10 ms */
apr_interval_time_t total = 0;
do {
#ifdef _AIX
/* On AIX, for processes like mod_cgid's script children where
* SIGCHLD is ignored, kill(pid,0) returns success for up to
* one second after the script child exits, based on when a
* daemon runs to clean up unnecessary process table entries.
* getpgid() can report the proper info (-1/ESRCH) immediately.
*/
if (getpgid(pid) < 0) {
#else
if (kill(pid, 0) < 0) {
#endif
return APR_SUCCESS;
}
apr_sleep(interval);
total = total + interval;
if (interval < 500000) {
interval *= 2;
}
} while (total < max_wait);
return APR_EGENERAL;
}
static apr_status_t cleanup_nonchild_process(request_rec *r, pid_t pid)
{
kill(pid, SIGTERM); /* in case it isn't dead yet */
if (dead_yet(pid, apr_time_from_sec(3)) == APR_SUCCESS) {
return APR_SUCCESS;
}
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"CGI process %" APR_PID_T_FMT " didn't exit, sending SIGKILL",
pid);
kill(pid, SIGKILL);
if (dead_yet(pid, apr_time_from_sec(3)) == APR_SUCCESS) {
return APR_SUCCESS;
}
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"CGI process %" APR_PID_T_FMT " didn't exit, sending SIGKILL again",
pid);
kill(pid, SIGKILL);
return APR_EGENERAL;
}
static apr_status_t cleanup_script(void *vptr)
{
struct cleanup_script_info *info = vptr;
int sd;
int rc;
cgid_req_t req = {0};
pid_t pid;
apr_status_t stat;
rc = connect_to_daemon(&sd, info->r, info->conf);
if (rc != OK) {
return APR_EGENERAL;
}
/* we got a socket, and there is already a cleanup registered for it */
req.req_type = GETPID_REQ;
req.ppid = parent_pid;
req.conn_id = info->r->connection->id;
stat = sock_write(sd, &req, sizeof(req));
if (stat != APR_SUCCESS) {
return stat;
}
/* wait for pid of script */
stat = sock_read(sd, &pid, sizeof(pid));
if (stat != APR_SUCCESS) {
return stat;
}
if (pid == 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, info->r,
"daemon couldn't find CGI process for connection %lu",
info->conn_id);
return APR_EGENERAL;
}
return cleanup_nonchild_process(info->r, pid);
}
static int cgid_handler(request_rec *r)
{
conn_rec *c = r->connection;
int retval, nph, dbpos = 0;
char *argv0, *dbuf = NULL;
apr_bucket_brigade *bb;
apr_bucket *b;
cgid_server_conf *conf;
int is_included;
int seen_eos, child_stopped_reading;
int sd;
char **env;
apr_file_t *tempsock;
struct cleanup_script_info *info;
apr_status_t rv;
if (strcmp(r->handler,CGI_MAGIC_TYPE) && strcmp(r->handler,"cgi-script"))
return DECLINED;
conf = ap_get_module_config(r->server->module_config, &cgid_module);
is_included = !strcmp(r->protocol, "INCLUDED");
if ((argv0 = strrchr(r->filename, '/')) != NULL)
argv0++;
else
argv0 = r->filename;
nph = !(strncmp(argv0, "nph-", 4));
argv0 = r->filename;
if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r))
return log_scripterror(r, conf, HTTP_FORBIDDEN, 0,
"Options ExecCGI is off in this directory");
if (nph && is_included)
return log_scripterror(r, conf, HTTP_FORBIDDEN, 0,
"attempt to include NPH CGI script");
#if defined(OS2) || defined(WIN32)
#error mod_cgid does not work on this platform. If you teach it to, look
#error at mod_cgi.c for required code in this path.
#else
if (r->finfo.filetype == 0)
return log_scripterror(r, conf, HTTP_NOT_FOUND, 0,
"script not found or unable to stat");
#endif
if (r->finfo.filetype == APR_DIR)
return log_scripterror(r, conf, HTTP_FORBIDDEN, 0,
"attempt to invoke directory as script");
if ((r->used_path_info == AP_REQ_REJECT_PATH_INFO) &&
r->path_info && *r->path_info)
{
/* default to accept */
return log_scripterror(r, conf, HTTP_NOT_FOUND, 0,
"AcceptPathInfo off disallows user's path");
}
/*
if (!ap_suexec_enabled) {
if (!ap_can_exec(&r->finfo))
return log_scripterror(r, conf, HTTP_FORBIDDEN, 0,
"file permissions deny server execution");
}
*/
ap_add_common_vars(r);
ap_add_cgi_vars(r);
env = ap_create_environment(r->pool, r->subprocess_env);
if ((retval = connect_to_daemon(&sd, r, conf)) != OK) {
return retval;
}
rv = send_req(sd, r, argv0, env, CGI_REQ);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"write to cgi daemon process");
}
info = apr_palloc(r->pool, sizeof(struct cleanup_script_info));
info->r = r;
info->conn_id = r->connection->id;
info->conf = conf;
apr_pool_cleanup_register(r->pool, info,
cleanup_script,
apr_pool_cleanup_null);
/* We are putting the socket discriptor into an apr_file_t so that we can
* use a pipe bucket to send the data to the client. APR will create
* a cleanup for the apr_file_t which will close the socket, so we'll
* get rid of the cleanup we registered when we created the socket.
*/
apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool);
apr_pool_cleanup_kill(r->pool, (void *)((long)sd), close_unix_socket);
if ((argv0 = strrchr(r->filename, '/')) != NULL)
argv0++;
else
argv0 = r->filename;
/* Transfer any put/post args, CERN style...
* Note that we already ignore SIGPIPE in the core server.
*/
bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
seen_eos = 0;
child_stopped_reading = 0;
if (conf->logname) {
dbuf = apr_palloc(r->pool, conf->bufbytes + 1);
dbpos = 0;
}
do {
apr_bucket *bucket;
rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
APR_BLOCK_READ, HUGE_STRING_LEN);
if (rv != APR_SUCCESS) {
if (APR_STATUS_IS_TIMEUP(rv)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"Timeout during reading request entity data");
return HTTP_REQUEST_TIME_OUT;
}
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"Error reading request entity data");
return HTTP_INTERNAL_SERVER_ERROR;
}
for (bucket = APR_BRIGADE_FIRST(bb);
bucket != APR_BRIGADE_SENTINEL(bb);
bucket = APR_BUCKET_NEXT(bucket))
{
const char *data;
apr_size_t len;
if (APR_BUCKET_IS_EOS(bucket)) {
seen_eos = 1;
break;
}
/* We can't do much with this. */
if (APR_BUCKET_IS_FLUSH(bucket)) {
continue;
}
/* If the child stopped, we still must read to EOS. */
if (child_stopped_reading) {
continue;
}
/* read */
apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
if (conf->logname && dbpos < conf->bufbytes) {
int cursize;
if ((dbpos + len) > conf->bufbytes) {
cursize = conf->bufbytes - dbpos;
}
else {
cursize = len;
}
memcpy(dbuf + dbpos, data, cursize);
dbpos += cursize;
}
/* Keep writing data to the child until done or too much time
* elapses with no progress or an error occurs.
*/
rv = apr_file_write_full(tempsock, data, len, NULL);
if (rv != APR_SUCCESS) {
/* silly script stopped reading, soak up remaining message */
child_stopped_reading = 1;
}
}
apr_brigade_cleanup(bb);
}
while (!seen_eos);
if (conf->logname) {
dbuf[dbpos] = '\0';
}
/* we're done writing, or maybe we didn't write at all;
* force EOF on child's stdin so that the cgi detects end (or
* absence) of data
*/
shutdown(sd, 1);
/* Handle script return... */
if (!nph) {
const char *location;
char sbuf[MAX_STRING_LEN];
int ret;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
b = apr_bucket_pipe_create(tempsock, c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
b = apr_bucket_eos_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
if ((ret = ap_scan_script_header_err_brigade(r, bb, sbuf))) {
ret = log_script(r, conf, ret, dbuf, sbuf, bb, NULL);
/*
* ret could be HTTP_NOT_MODIFIED in the case that the CGI script
* does not set an explicit status and ap_meets_conditions, which
* is called by ap_scan_script_header_err_brigade, detects that
* the conditions of the requests are met and the response is
* not modified.
* In this case set r->status and return OK in order to prevent
* running through the error processing stack as this would
* break with mod_cache, if the conditions had been set by
* mod_cache itself to validate a stale entity.
* BTW: We circumvent the error processing stack anyway if the
* CGI script set an explicit status code (whatever it is) and
* the only possible values for ret here are:
*
* HTTP_NOT_MODIFIED (set by ap_meets_conditions)
* HTTP_PRECONDITION_FAILED (set by ap_meets_conditions)
* HTTP_INTERNAL_SERVER_ERROR (if something went wrong during the
* processing of the response of the CGI script, e.g broken headers
* or a crashed CGI process).
*/
if (ret == HTTP_NOT_MODIFIED) {
r->status = ret;
return OK;
}
return ret;
}
location = apr_table_get(r->headers_out, "Location");
if (location && location[0] == '/' && r->status == 200) {
/* Soak up all the script output */
discard_script_output(bb);
apr_brigade_destroy(bb);
/* This redirect needs to be a GET no matter what the original
* method was.
*/
r->method = apr_pstrdup(r->pool, "GET");
r->method_number = M_GET;
/* We already read the message body (if any), so don't allow
* the redirected request to think it has one. We can ignore
* Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR.
*/
apr_table_unset(r->headers_in, "Content-Length");
ap_internal_redirect_handler(location, r);
return OK;
}
else if (location && r->status == 200) {
/* XX Note that if a script wants to produce its own Redirect
* body, it now has to explicitly *say* "Status: 302"
*/
discard_script_output(bb);
apr_brigade_destroy(bb);
return HTTP_MOVED_TEMPORARILY;
}
ap_pass_brigade(r->output_filters, bb);
}
if (nph) {
struct ap_filter_t *cur;
/* get rid of all filters up through protocol... since we
* haven't parsed off the headers, there is no way they can
* work
*/
cur = r->proto_output_filters;
while (cur && cur->frec->ftype < AP_FTYPE_CONNECTION) {
cur = cur->next;
}
r->output_filters = r->proto_output_filters = cur;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
b = apr_bucket_pipe_create(tempsock, c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
b = apr_bucket_eos_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
ap_pass_brigade(r->output_filters, bb);
}
return OK; /* NOT r->status, even if it has changed. */
}
/*============================================================================
*============================================================================
* This is the beginning of the cgi filter code moved from mod_include. This
* is the code required to handle the "exec" SSI directive.
*============================================================================
*============================================================================*/
static apr_status_t include_cgi(include_ctx_t *ctx, ap_filter_t *f,
apr_bucket_brigade *bb, char *s)
{
request_rec *r = f->r;
request_rec *rr = ap_sub_req_lookup_uri(s, r, f->next);
int rr_status;
if (rr->status != HTTP_OK) {
ap_destroy_sub_req(rr);
return APR_EGENERAL;
}
/* No hardwired path info or query allowed */
if ((rr->path_info && rr->path_info[0]) || rr->args) {
ap_destroy_sub_req(rr);
return APR_EGENERAL;
}
if (rr->finfo.filetype != APR_REG) {
ap_destroy_sub_req(rr);
return APR_EGENERAL;
}
/* Script gets parameters of the *document*, for back compatibility */
rr->path_info = r->path_info; /* hard to get right; see mod_cgi.c */
rr->args = r->args;
/* Force sub_req to be treated as a CGI request, even if ordinary
* typing rules would have called it something else.
*/
ap_set_content_type(rr, CGI_MAGIC_TYPE);
/* Run it. */
rr_status = ap_run_sub_req(rr);
if (ap_is_HTTP_REDIRECT(rr_status)) {
const char *location = apr_table_get(rr->headers_out, "Location");
if (location) {
char *buffer;
location = ap_escape_html(rr->pool, location);
buffer = apr_pstrcat(ctx->pool, "<a href=\"", location, "\">",
location, "</a>", NULL);
APR_BRIGADE_INSERT_TAIL(bb, apr_bucket_pool_create(buffer,
strlen(buffer), ctx->pool,
f->c->bucket_alloc));
}
}
ap_destroy_sub_req(rr);
return APR_SUCCESS;
}
/* This is the special environment used for running the "exec cmd="
* variety of SSI directives.
*/
static void add_ssi_vars(request_rec *r)
{
apr_table_t *e = r->subprocess_env;
if (r->path_info && r->path_info[0] != '\0') {
request_rec *pa_req;
apr_table_setn(e, "PATH_INFO", ap_escape_shell_cmd(r->pool, r->path_info));
pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), r, NULL);
if (pa_req->filename) {
apr_table_setn(e, "PATH_TRANSLATED",
apr_pstrcat(r->pool, pa_req->filename, pa_req->path_info, NULL));
}
ap_destroy_sub_req(pa_req);
}
if (r->args) {
char *arg_copy = apr_pstrdup(r->pool, r->args);
apr_table_setn(e, "QUERY_STRING", r->args);
ap_unescape_url(arg_copy);
apr_table_setn(e, "QUERY_STRING_UNESCAPED", ap_escape_shell_cmd(r->pool, arg_copy));
}
}
static int include_cmd(include_ctx_t *ctx, ap_filter_t *f,
apr_bucket_brigade *bb, char *command)
{
char **env;
int sd;
int retval;
apr_file_t *tempsock = NULL;
request_rec *r = f->r;
cgid_server_conf *conf = ap_get_module_config(r->server->module_config,
&cgid_module);
struct cleanup_script_info *info;
add_ssi_vars(r);
env = ap_create_environment(r->pool, r->subprocess_env);
if ((retval = connect_to_daemon(&sd, r, conf)) != OK) {
return retval;
}
send_req(sd, r, command, env, SSI_REQ);
info = apr_palloc(r->pool, sizeof(struct cleanup_script_info));
info->r = r;
info->conn_id = r->connection->id;
info->conf = conf;
/* for this type of request, the script is invoked through an
* intermediate shell process... cleanup_script is only able
* to knock out the shell process, not the actual script
*/
apr_pool_cleanup_register(r->pool, info,
cleanup_script,
apr_pool_cleanup_null);
/* We are putting the socket discriptor into an apr_file_t so that we can
* use a pipe bucket to send the data to the client. APR will create
* a cleanup for the apr_file_t which will close the socket, so we'll
* get rid of the cleanup we registered when we created the socket.
*/
apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool);
apr_pool_cleanup_kill(r->pool, (void *)((long)sd), close_unix_socket);
APR_BRIGADE_INSERT_TAIL(bb, apr_bucket_pipe_create(tempsock,
f->c->bucket_alloc));
ctx->flush_now = 1;
return APR_SUCCESS;
}
static apr_status_t handle_exec(include_ctx_t *ctx, ap_filter_t *f,
apr_bucket_brigade *bb)
{
char *tag = NULL;
char *tag_val = NULL;
request_rec *r = f->r;
char *file = r->filename;
char parsed_string[MAX_STRING_LEN];
if (!ctx->argc) {
ap_log_rerror(APLOG_MARK,
(ctx->flags & SSI_FLAG_PRINTING)
? APLOG_ERR : APLOG_WARNING,
0, r, "missing argument for exec element in %s",
r->filename);
}
if (!(ctx->flags & SSI_FLAG_PRINTING)) {
return APR_SUCCESS;
}
if (!ctx->argc) {
SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
return APR_SUCCESS;
}
if (ctx->flags & SSI_FLAG_NO_EXEC) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "exec used but not allowed "
"in %s", r->filename);
SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
return APR_SUCCESS;
}
while (1) {
cgid_pfn_gtv(ctx, &tag, &tag_val, SSI_VALUE_DECODED);
if (!tag || !tag_val) {
break;
}
if (!strcmp(tag, "cmd")) {
apr_status_t rv;
cgid_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
SSI_EXPAND_LEAVE_NAME);
rv = include_cmd(ctx, f, bb, parsed_string);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"execution failure for parameter \"%s\" "
"to tag exec in file %s", tag, r->filename);
SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
break;
}
}
else if (!strcmp(tag, "cgi")) {
apr_status_t rv;
cgid_pfn_ps(ctx, tag_val, parsed_string, sizeof(parsed_string),
SSI_EXPAND_DROP_NAME);
rv = include_cgi(ctx, f, bb, parsed_string);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "invalid CGI ref "
"\"%s\" in %s", tag_val, file);
SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
break;
}
}
else {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "unknown parameter "
"\"%s\" to tag exec in %s", tag, file);
SSI_CREATE_ERROR_BUCKET(ctx, f, bb);
break;
}
}
return APR_SUCCESS;
}
/*============================================================================
*============================================================================
* This is the end of the cgi filter code moved from mod_include.
*============================================================================
*============================================================================*/
static void register_hook(apr_pool_t *p)
{
static const char * const aszPre[] = { "mod_include.c", NULL };
ap_hook_pre_config(cgid_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_post_config(cgid_init, aszPre, NULL, APR_HOOK_MIDDLE);
ap_hook_handler(cgid_handler, NULL, NULL, APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(cgid) = {
STANDARD20_MODULE_STUFF,
NULL, /* dir config creater */
NULL, /* dir merger --- default is to override */
create_cgid_config, /* server config */
merge_cgid_config, /* merge server config */
cgid_cmds, /* command table */
register_hook /* register_handlers */
};