mod_cgid.c revision 36906f11e659bf5e500ccc93025dab95cd790291
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering/* ====================================================================
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * The Apache Software License, Version 1.1
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * Copyright (c) 2000 The Apache Software Foundation. All rights
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * reserved.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * Redistribution and use in source and binary forms, with or without
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * modification, are permitted provided that the following conditions
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * are met:
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * 1. Redistributions of source code must retain the above copyright
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * notice, this list of conditions and the following disclaimer.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * 2. Redistributions in binary form must reproduce the above copyright
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * notice, this list of conditions and the following disclaimer in
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * the documentation and/or other materials provided with the
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * distribution.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * 3. The end-user documentation included with the redistribution,
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * if any, must include the following acknowledgment:
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * "This product includes software developed by the
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * Apache Software Foundation (http://www.apache.org/)."
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * Alternately, this acknowledgment may appear in the software itself,
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * if and wherever such third-party acknowledgments normally appear.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering *
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * 4. The names "Apache" and "Apache Software Foundation" must
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering * not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/*
* http_script: keeps all script-related ramblings together.
*
* Compliant to cgi/1.1 spec
*
* Adapted by rst from original NCSA code by Rob McCool
*
* Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for
* custom error responses, and DOCUMENT_ROOT because we found it useful.
* It also adds SERVER_ADMIN - useful for scripts to know who to mail when
* they fail.
*/
#define CORE_PRIVATE
#include "apr_lib.h"
#include "apr_general.h"
#include "apr_file_io.h"
#include "apr_portable.h"
#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_main.h"
#include "http_log.h"
#include "util_script.h"
#include "http_conf_globals.h"
#include "buff.h"
#include "ap_mpm.h"
#include "iol_socket.h"
#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif
#ifndef sockaddr_un
struct sockaddr_un {
unsigned short sun_family;
char sun_path[UNIX_PATH_MAX];
};
#endif
module MODULE_VAR_EXPORT cgid_module;
static void cgid_init(ap_pool_t *p, ap_pool_t *plog, ap_pool_t *ptemp, server_rec *main_server);
static int once_through = 0;
static ap_pool_t *pcgi;
/* KLUDGE --- for back-combatibility, we don't have to check Execcgid
* in ScriptAliased directories, which means we need to know if this
* request came through ScriptAlias or not... so the Alias module
* leaves a note for us.
*/
static int is_scriptaliased(request_rec *r)
{
const char *t = ap_table_get(r->notes, "alias-forced-type");
return t && (!strcasecmp(t, "cgi-script"));
}
/* Configuration stuff */
#define DEFAULT_LOGBYTES 10385760
#define DEFAULT_BUFBYTES 1024
#define DEFAULT_SOCKET "logs/cgisock"
#define SHELL_PATH "/bin/sh"
typedef struct {
const char *sockname;
char *logname;
long logbytes;
int bufbytes;
BUFF *bin;
BUFF *bout;
BUFF *berror;
} cgid_server_conf;
/* If a request includes query info in the URL (stuff after "?"), and
* the query info does not contain "=" (indicative of a FORM submission),
* then this routine is called to create the argument list to be passed
* to the CGI script. When suexec is enabled, the suexec path, user, and
* group are the first three arguments to be passed; if not, all three
* must be NULL. The query info is split into separate arguments, where
* "+" is the separator between keyword arguments.
*
* XXXX: note that the WIN32 code uses one of the suexec strings
* to pass an interpreter name. Remember this if changing the way they
* are handled in create_argv.
*
*/
static char **create_argv(ap_pool_t *p, char *path, char *user, char *group,
char *av0, const char *args)
{
int x, numwords;
char **av;
char *w;
int idx = 0;
/* count the number of keywords */
for (x = 0, numwords = 1; args[x]; x++) {
if (args[x] == '+') {
++numwords;
}
}
if (numwords > APACHE_ARG_MAX - 5) {
numwords = APACHE_ARG_MAX - 5; /* Truncate args to prevent overrun */
}
av = (char **) ap_palloc(p, (numwords + 5) * sizeof(char *));
if (path) {
av[idx++] = path;
}
if (user) {
av[idx++] = user;
}
if (group) {
av[idx++] = group;
}
av[idx++] = av0;
for (x = 1; x <= numwords; x++) {
w = ap_getword_nulls(p, &args, '+');
ap_unescape_url(w);
av[idx++] = ap_escape_shell_cmd(p, w);
}
av[idx] = NULL;
return av;
}
static int call_exec(request_rec *r, char *argv0, char **env, int shellcmd)
{
int pid = 0;
int errfileno = STDERR_FILENO;
/* the fd on r->server->error_log is closed, but we need somewhere to * put the error messages from the log_* functions. So, we use stderr,
* since that is better than allowing errors to go unnoticed.
*/
ap_put_os_file(&r->server->error_log, &errfileno, r->pool);
/* TODO: reimplement suexec */
#if 0
if (ap_suexec_enabled
&& ((r->server->server_uid != ap_user_id)
|| (r->server->server_gid != ap_group_id)
|| (!strncmp("/~", r->uri, 2)))) {
char *execuser, *grpname;
struct passwd *pw;
struct group *gr;
if (!strncmp("/~", r->uri, 2)) {
gid_t user_gid;
char *username = ap_pstrdup(r->pool, r->uri + 2);
char *pos = strchr(username, '/');
if (pos) {
*pos = '\0';
}
if ((pw = getpwnam(username)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getpwnam: invalid username %s", username);
return (pid);
}
execuser = ap_pstrcat(r->pool, "~", pw->pw_name, NULL);
user_gid = pw->pw_gid;
if ((gr = getgrgid(user_gid)) == NULL) {
if ((grpname = ap_palloc(r->pool, 16)) == NULL) {
return (pid);
}
else {
ap_snprintf(grpname, 16, "%ld", (long) user_gid);
}
}
else {
grpname = gr->gr_name;
}
}
else {
if ((pw = getpwuid(r->server->server_uid)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getpwuid: invalid userid %ld",
(long) r->server->server_uid);
return (pid);
}
execuser = ap_pstrdup(r->pool, pw->pw_name);
if ((gr = getgrgid(r->server->server_gid)) == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"getgrgid: invalid groupid %ld",
(long) r->server->server_gid);
return (pid);
}
grpname = gr->gr_name;
}
if (shellcmd) {
execle(SUEXEC_BIN, SUEXEC_BIN, execuser, grpname, argv0,
NULL, env);
}
else if ((!r->args) || (!r->args[0]) || strchr(r->args, '=')) {
execle(SUEXEC_BIN, SUEXEC_BIN, execuser, grpname, argv0,
NULL, env);
}
else {
execve(SUEXEC_BIN,
create_argv(r->pool, SUEXEC_BIN, execuser, grpname,
argv0, r->args),
env);
}
}
else {
#endif
if (shellcmd) {
execle(SHELL_PATH, SHELL_PATH, "-c", argv0, NULL, env);
}
else if ((!r->args) || (!r->args[0]) || strchr(r->args, '=')) {
execle(r->filename, argv0, NULL, env);
}
else {
execve(r->filename,
create_argv(r->pool, NULL, NULL, NULL, argv0, r->args),
env);
}
#if 0
}
#endif
return (pid);
}
static void cgid_maint(int reason, void *data, ap_wait_t status)
{
#ifdef APR_HAS_OTHER_CHILD
int *sd = data;
switch (reason) {
case APR_OC_REASON_DEATH:
case APR_OC_REASON_LOST:
/* stop gap to make sure everything else works. In the end,
* we'll just restart the cgid server. */
ap_destroy_pool(pcgi);
kill(getppid(), SIGWINCH);
break;
case APR_OC_REASON_RESTART:
case APR_OC_REASON_UNREGISTER:
ap_destroy_pool(pcgi);
kill(*sd, SIGHUP);
break;
}
#endif
}
static void get_req(int fd, request_rec *r, char **filename, char **argv0, char ***env)
{
int i, len, j;
unsigned char *data;
char **environ;
core_dir_config *temp_core;
void **dconf;
r->server = ap_pcalloc(r->pool, sizeof(server_rec));
read(fd, &j, sizeof(int));
read(fd, &len, sizeof(int));
data = ap_pcalloc(r->pool, len);
i = read(fd, data, len);
r->filename = ap_getword(r->pool, (const char **)&data, '\n');
*argv0 = ap_getword(r->pool, (const char **)&data, '\n');
r->uri = ap_getword(r->pool, (const char **)&data, '\n');
environ = ap_pcalloc(r->pool, (j + 2) *sizeof(char *));
i = 0;
for (i = 0; i < j; i++) {
environ[i] = ap_getword(r->pool, (const char **)&data, '\n');
}
*env = environ;
r->args = ap_getword(r->pool, (const char **)&data, '\n');
read(fd, &r->server->server_uid, sizeof(uid_t));
read(fd, &r->server->server_gid, sizeof(gid_t));
read(fd, &i, sizeof(int));
/* add 1, so that if i == 0, we still malloc something. */
dconf = (void **)malloc(sizeof(void *) * i + 1);
temp_core = (core_dir_config *)malloc(sizeof(core_module));
#if 0
#ifdef RLIMIT_CPU
read(fd, &j, sizeof(int));
if (j) {
temp_core->limit_cpu = (struct rlimit *)malloc (sizeof(struct rlimit));
read(fd, temp_core->limit_cpu, sizeof(struct rlimit));
}
else {
temp_core->limit_cpu = NULL;
}
#endif
#if defined (RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
read(fd, &j, sizeof(int));
if (j) {
temp_core->limit_mem = (struct rlimit *)malloc (sizeof(struct rlimit));
read(fd, temp_core->limit_mem, sizeof(struct rlimit));
}
else {
temp_core->limit_mem = NULL;
}
#endif
#ifdef RLIMIT_NPROC
read(fd, &j, sizeof(int));
if (j) {
temp_core->limit_nproc = (struct rlimit *)malloc (sizeof(struct rlimit));
read(fd, temp_core->limit_nproc, sizeof(struct rlimit));
}
else {
temp_core->limit_nproc = NULL;
}
#endif
#endif
dconf[i] = (void *)temp_core;
r->per_dir_config = dconf;
}
static void send_req(int fd, request_rec *r, char *argv0, char **env)
{
int len;
int i = 0;
char *data;
data = ap_pstrcat(r->pool, r->filename, "\n", argv0, "\n", r->uri, "\n",
NULL);
for (i =0; env[i]; i++) {
continue;
}
if (write(fd, &i, sizeof(int)) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
for (i = 0; env[i]; i++) {
data = ap_pstrcat(r->pool, data, env[i], "\n", NULL);
}
data = ap_pstrcat(r->pool, data, r->args, NULL);
len = strlen(data);
if (write(fd, &len, sizeof(int)) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
if (write(fd, data, len) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
if (write(fd, &r->server->server_uid, sizeof(uid_t)) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
if (write(fd, &r->server->server_gid, sizeof(gid_t)) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
if (write(fd, &core_module.module_index, sizeof(int)) < 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
"write to cgi daemon process");
}
#if 0
#ifdef RLIMIT_CPU
if (conf->limit_cpu) {
len = 1;
write(fd, &len, sizeof(int));
write(fd, conf->limit_cpu, sizeof(struct rlimit));
}
else {
len = 0;
write(fd, &len, sizeof(int));
}
#endif
#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
if (conf->limit_mem) {
len = 1;
write(fd, &len, sizeof(int));
write(fd, conf->limit_mem, sizeof(struct rlimit));
}
else {
len = 0;
write(fd, &len, sizeof(int));
}
#endif
#ifdef RLIMIT_NPROC
if (conf->limit_nproc) {
len = 1;
write(fd, &len, sizeof(int));
write(fd, conf->limit_nproc, sizeof(struct rlimit));
}
else {
len = 0;
write(fd, &len, sizeof(int));
}
#endif
#endif
}
static int cgid_server_child(int sd)
{
char *argv0;
char *filename;
char **env;
ap_pool_t *p;
request_rec *r;
ap_create_pool(&p, pcgi);
r = ap_pcalloc(p, sizeof(request_rec));
r->pool = p;
dup2(sd, STDIN_FILENO);
dup2(sd, STDOUT_FILENO);
get_req(sd, r, &filename, &argv0, &env);
call_exec(r, argv0, env, 0);
exit(-1); /* We should NEVER get here */
}
static int cgid_server(void *data)
{
struct sockaddr_un unix_addr;
int pid;
int sd, sd2, len;
int errfile;
server_rec *main_server = data;
cgid_server_conf *sconf = (cgid_server_conf *)ap_get_module_config(
main_server->module_config, &cgid_module);
ap_signal(SIGCHLD, SIG_IGN);
unlink(sconf->sockname);
if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
"Couldn't create unix domain socket");
}
memset(&unix_addr, 0, sizeof(unix_addr));
unix_addr.sun_family = AF_UNIX;
strcpy(unix_addr.sun_path, sconf->sockname);
if (bind(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
"Couldn't bind unix domain socket");
}
/* Most implementations silently enforce a value of 5 anyway.
* This way, it'll work the same everywhere. */
if (listen(sd, 5) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
"Couldn't listen on unix domain socket");
}
while (1) {
sd2 = accept(sd, (struct sockaddr *)&unix_addr, &len);
if (sd2 < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, (server_rec *)data,
"Error accepting on cgid socket.");
continue;
}
if ((pid = fork()) > 0) {
close(sd2);
}
else if (pid == 0) {
/* setup the STDERR here, because I have all the info
* for it. I'll do the STDIN and STDOUT later, but I can't
* do STDERR as easily.
*/
if (sconf->logname) {
dup2(open(sconf->logname, O_WRONLY), STDERR_FILENO);
}
else {
ap_get_os_file(&errfile, main_server->error_log);
dup2(errfile, STDERR_FILENO);
}
cgid_server_child(sd2);
}
else {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, (server_rec *)data,
"Couldn't fork cgi script");
}
}
return -1;
}
static void cgid_init(ap_pool_t *p, ap_pool_t *plog, ap_pool_t *ptemp, server_rec *main_server)
{
int pid;
ap_proc_t ap_pid;
int tempfd;
cgid_server_conf *sconf = (cgid_server_conf *)ap_get_module_config(
main_server->module_config, &cgid_module);
if (once_through > 0) {
ap_create_pool(&pcgi, p);
tempfd = creat(sconf->sockname, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
close(tempfd);
if ((pid = fork()) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,
"Couldn't spawn cgid daemon process");
}
else if (pid == 0) {
cgid_server(main_server);
exit(-1);
}
#ifdef APR_HAS_OTHER_CHILD
ap_pid.pid = pid;
ap_pid.err = ap_pid.in = ap_pid.out = NULL;
ap_register_other_child(&ap_pid, cgid_maint, NULL, NULL, p);
#endif
}
else once_through++;
}
static void *create_cgid_config(ap_pool_t *p, server_rec *s)
{
cgid_server_conf *c =
(cgid_server_conf *) ap_pcalloc(p, sizeof(cgid_server_conf));
c->logname = NULL;
c->logbytes = DEFAULT_LOGBYTES;
c->bufbytes = DEFAULT_BUFBYTES;
c->sockname = ap_server_root_relative(p, DEFAULT_SOCKET);
c->bin = c->bout = c->berror = NULL;
return c;
}
static void *merge_cgid_config(ap_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, char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf =
(cgid_server_conf *) ap_get_module_config(s->module_config, &cgid_module);
conf->logname = arg;
return NULL;
}
static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf =
(cgid_server_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, char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf =
(cgid_server_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, char *arg)
{
server_rec *s = cmd->server;
cgid_server_conf *conf =
(cgid_server_conf *) ap_get_module_config(s->module_config, &cgid_module);
conf->sockname = ap_server_root_relative(cmd->pool, arg);
return NULL;
}
static const command_rec cgid_cmds[] =
{
{"ScriptLog", set_scriptlog, NULL, RSRC_CONF, TAKE1,
"the name of a log for script debugging info"},
{"ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF, TAKE1,
"the maximum length (in bytes) of the script debug log"},
{"ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF, TAKE1,
"the maximum size (in bytes) to record of a POST request"},
{"Scriptsock", set_script_socket, NULL, RSRC_CONF, TAKE1,
"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,
int show_errno, char *error)
{
ap_file_t *f = NULL;
struct stat finfo;
char time_str[AP_CTIME_LEN];
ap_log_rerror(APLOG_MARK, show_errno|APLOG_ERR, errno, r,
"%s: %s", error, r->filename);
if (!conf->logname ||
((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
&& (finfo.st_size > conf->logbytes)) ||
(ap_open(&f, ap_server_root_relative(r->pool, conf->logname),
APR_APPEND, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) {
return ret;
}
/* "%% [Wed Jun 19 10:53:21 1996] GET /cgid-bin/printenv HTTP/1.0" */
ap_ctime(time_str, ap_now());
ap_fprintf(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 */
ap_fprintf(f, "%%%% %d %s\n", ret, r->filename);
ap_fprintf(f, "%%error\n%s\n", error);
ap_close(f);
return ret;
}
static int log_script(request_rec *r, cgid_server_conf * conf, int ret,
char *dbuf, const char *sbuf, BUFF *script_in, BUFF *script_err)
{
ap_array_header_t *hdrs_arr = ap_table_elts(r->headers_in);
ap_table_entry_t *hdrs = (ap_table_entry_t *) hdrs_arr->elts;
char argsbuffer[HUGE_STRING_LEN];
ap_file_t *f = NULL;
int i;
struct stat finfo;
char time_str[AP_CTIME_LEN];
if (!conf->logname ||
((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
&& (finfo.st_size > conf->logbytes)) ||
(ap_open(&f, ap_server_root_relative(r->pool, conf->logname),
APR_APPEND, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) {
/* Soak up script output */
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
continue;
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
continue;
return ret;
}
/* "%% [Wed Jun 19 10:53:21 1996] GET /cgid-bin/printenv HTTP/1.0" */
ap_ctime(time_str, ap_now());
ap_fprintf(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" */
ap_fprintf(f, "%%%% %d %s\n", ret, r->filename);
ap_puts("%request\n", f);
for (i = 0; i < hdrs_arr->nelts; ++i) {
if (!hdrs[i].key)
continue;
ap_fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
}
if ((r->method_number == M_POST || r->method_number == M_PUT)
&& *dbuf) {
ap_fprintf(f, "\n%s\n", dbuf);
}
ap_puts("%response\n", f);
hdrs_arr = ap_table_elts(r->err_headers_out);
hdrs = (ap_table_entry_t *) hdrs_arr->elts;
for (i = 0; i < hdrs_arr->nelts; ++i) {
if (!hdrs[i].key)
continue;
ap_fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
}
if (sbuf && *sbuf)
ap_fprintf(f, "%s\n", sbuf);
if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
ap_puts("%stdout\n", f);
ap_puts(argsbuffer, f);
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
ap_puts(argsbuffer, f);
ap_puts("\n", f);
}
if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
ap_puts("%stderr\n", f);
ap_puts(argsbuffer, f);
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
ap_puts(argsbuffer, f);
ap_puts("\n", f);
}
ap_bclose(script_in);
ap_bclose(script_err);
ap_close(f);
return ret;
}
/****************************************************************
*
* Actual cgid handling...
*/
static int cgid_handler(request_rec *r)
{
int retval, nph, dbpos = 0;
char *argv0, *dbuf = NULL;
BUFF *script = NULL;
char argsbuffer[HUGE_STRING_LEN];
void *sconf = r->server->module_config;
cgid_server_conf *conf = (cgid_server_conf *) ap_get_module_config(sconf, &cgid_module);
int is_included = !strcmp(r->protocol, "INCLUDED");
int sd;
char **env;
struct sockaddr_un unix_addr;
ap_socket_t *tempsock = NULL;
int nbytes;
ap_iol *iol;
script = ap_bcreate(r->pool, B_RDWR);
if (r->method_number == M_OPTIONS) {
/* 99 out of 100 cgid scripts, this is all they support */
r->allowed |= (1 << M_GET);
r->allowed |= (1 << M_POST);
return DECLINED;
}
if ((argv0 = strrchr(r->filename, '/')) != NULL)
argv0++;
else
argv0 = r->filename;
nph = !(strncmp(argv0, "nph-", 4));
if ((argv0 = strrchr(r->filename, '/')) != NULL)
argv0++;
else
argv0 = r->filename;
if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r))
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
"Options ExecCGI is off in this directory");
if (nph && is_included)
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
"attempt to include NPH CGI script");
#if defined(OS2) || defined(WIN32)
/* Allow for cgid files without the .EXE extension on them under OS/2 */
if (r->finfo.st_mode == 0) {
struct stat statbuf;
char *newfile;
newfile = ap_pstrcat(r->pool, r->filename, ".EXE", NULL);
if ((stat(newfile, &statbuf) != 0) || (!S_ISREG(statbuf.st_mode))) {
return log_scripterror(r, conf, NOT_FOUND, 0,
"script not found or unable to stat");
} else {
r->filename = newfile;
}
}
#else
if (r->finfo.protection == 0)
return log_scripterror(r, conf, NOT_FOUND, APLOG_NOERRNO,
"script not found or unable to stat");
#endif
if (r->finfo.filetype == APR_DIR)
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
"attempt to invoke directory as script");
/*
if (!ap_suexec_enabled) {
if (!ap_can_exec(&r->finfo))
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
"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 ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
return log_scripterror(r, conf, NOT_FOUND, 0,
"unable to create socket to cgi daemon");
}
memset(&unix_addr, 0, sizeof(unix_addr));
unix_addr.sun_family = AF_UNIX;
strcpy(unix_addr.sun_path, conf->sockname);
if (connect(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) {
return log_scripterror(r, conf, NOT_FOUND, 0,
"unable to connect to cgi daemon");
}
send_req(sd, r, argv0, env);
ap_put_os_sock(&tempsock, &sd, pcgi);
iol = unix_attach_socket(tempsock);
ap_bpush_iol(script, iol);
if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
return retval;
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.
*/
if (ap_should_client_block(r)) {
int dbsize, len_read;
if (conf->logname) {
dbuf = ap_pcalloc(r->pool, conf->bufbytes + 1);
dbpos = 0;
}
while ((len_read =
ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN)) > 0) {
if (conf->logname) {
if ((dbpos + len_read) > conf->bufbytes) {
dbsize = conf->bufbytes - dbpos;
}
else {
dbsize = len_read;
}
memcpy(dbuf + dbpos, argsbuffer, dbsize);
dbpos += dbsize;
}
ap_bwrite(script, argsbuffer, len_read, &nbytes);
if (nbytes < len_read) {
/* silly script stopped reading, soak up remaining message */
while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN) > 0) {
/* dump it */
}
break;
}
}
ap_bflush(script);
}
/* Handle script return... */
if (script && !nph) {
const char *location;
char sbuf[MAX_STRING_LEN];
int ret;
if ((ret = ap_scan_script_header_err_buff(r, script, sbuf))) {
return log_script(r, conf, ret, dbuf, sbuf, script, NULL);
}
location = ap_table_get(r->headers_out, "Location");
if (location && location[0] == '/' && r->status == 200) {
/* Soak up all the script output */
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script) > 0) {
continue;
}
/* This redirect needs to be a GET no matter what the original
* method was.
*/
r->method = ap_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.
*/
ap_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"
*/
return REDIRECT;
}
ap_send_http_header(r);
if (!r->header_only) {
ap_send_fb(script, r);
}
ap_bclose(script);
}
if (script && nph) {
ap_send_fb(script, r);
}
return OK; /* NOT r->status, even if it has changed. */
}
static const handler_rec cgid_handlers[] =
{
{CGI_MAGIC_TYPE, cgid_handler},
{"cgi-script", cgid_handler},
{NULL}
};
static void register_hook(void)
{
ap_hook_post_config(cgid_init, NULL, NULL, AP_HOOK_MIDDLE);
}
module MODULE_VAR_EXPORT cgid_module = {
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 */
cgid_handlers, /* handlers */
register_hook /* register_handlers */
};