#include "apr_lib.h"

#include "apr_strings.h"

#include "apr_general.h"

#include "apr_file_io.h"

#include "apr_portable.h"

#include "apr_buckets.h"

#include "apr_optional.h"

#include "apr_signal.h"

#define APR_WANT_STRFUNC

#include "apr_want.h"

#if APR_HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#endif

#if APR_HAVE_UNISTD_H

#include <unistd.h>

#endif

#if APR_HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#define CORE_PRIVATE

#include "util_filter.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 "ap_mpm.h"

#include "unixd.h"

#include "mod_suexec.h"

#include "../filters/mod_include.h"

#include "mod_core.h"

#include <sys/stat.h>

#include <sys/un.h> /* for sockaddr_un */

module AP_MODULE_DECLARE_DATA cgid_module;

static int cgid_start(apr_pool_t *p, server_rec *main_server, apr_proc_t *procnew);

static int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *main_server);

static int handle_exec(include_ctx_t *ctx, ap_filter_t *f, apr_bucket_brigade *bb);

static APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgid_pfn_reg_with_ssi;

static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgid_pfn_gtv;

static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgid_pfn_ps;

static apr_pool_t *pcgi = NULL;

static int total_modules = 0;

static pid_t daemon_pid;

static int daemon_should_exit = 0;

static server_rec *root_server = NULL;

static apr_pool_t *root_pool = NULL;

static void discard_script_output(apr_bucket_brigade *bb);

static int is_scriptaliased(request_rec *r)

{

const char *t = apr_table_get(r->notes, "alias-forced-type");

return t && (!strcasecmp(t, "cgi-script"));

}

#define DEFAULT_LOGBYTES 10385760

#define DEFAULT_BUFBYTES 1024

#define DEFAULT_SOCKET DEFAULT_REL_RUNTIMEDIR "/cgisock"

#define CGI_REQ 1

#define SSI_REQ 2

#define GETPID_REQ 3 /* get the pid of script created for prior request */

#define ERRFN_USERDATA_KEY "CGIDCHILDERRFN"

#ifndef DEFAULT_CGID_LISTENBACKLOG

#define DEFAULT_CGID_LISTENBACKLOG 100

#endif

#ifndef DEFAULT_CONNECT_ATTEMPTS

#define DEFAULT_CONNECT_ATTEMPTS 15

#endif

typedef struct {

const char *sockname;

const char *logname;

long logbytes;

int bufbytes;

} cgid_server_conf;

typedef struct {

int req_type; /* request type (CGI_REQ, SSI_REQ, etc.) */

unsigned long conn_id; /* connection id; daemon uses this as a hash value

int core_module_index;

int have_suexec;

int suexec_module_index;

suexec_config_t suexec_cfg;

int env_count;

apr_size_t filename_len;

apr_size_t argv0_len;

apr_size_t uri_len;

apr_size_t args_len;

apr_size_t mod_userdir_user_len;

int loglevel; /* to stuff in server_rec */

} cgid_req_t;

static char **create_argv(apr_pool_t *p, char *path, char *user, char *group,

char *av0, const char *args)

{

int x, numwords;

char **av;

char *w;

int idx = 0;

if (ap_strchr_c(args, '=')) {

numwords = 0;

}

else {

/* 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 **) apr_pcalloc(p, (numwords + 5) * sizeof(char *));

if (path) {

av[idx++] = path;

}

if (user) {

av[idx++] = user;

}

if (group) {

av[idx++] = group;

}

av[idx++] = apr_pstrdup(p, av0);

for (x = 1; x <= numwords; x++) {

w = ap_getword_nulls(p, &args, '+');

if (strcmp(w, "")) {

ap_unescape_url(w);

av[idx++] = ap_escape_shell_cmd(p, w);

}

}

av[idx] = NULL;

return av;

}

#if APR_HAS_OTHER_CHILD

static void cgid_maint(int reason, void *data, apr_wait_t status)

{

apr_proc_t *proc = data;

switch (reason) {

case APR_OC_REASON_DEATH:

apr_proc_other_child_unregister(data);

/* If apache is not terminating or restarting,

if (!ap_graceful_stop_signalled()) {

ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,

"cgid daemon process died, restarting");

cgid_start(root_pool, root_server, proc);

}

break;

case APR_OC_REASON_RESTART:

/* don't do anything; server is stopping or restarting */

apr_proc_other_child_unregister(data);

break;

case APR_OC_REASON_LOST:

/* Restart the child cgid daemon process */

apr_proc_other_child_unregister(data);

cgid_start(root_pool, root_server, proc);

break;

case APR_OC_REASON_UNREGISTER:

/* we get here when pcgi is cleaned up; pcgi gets cleaned

kill(proc->pid, SIGHUP); /* send signal to daemon telling it to die */

break;

}

}

#endif

static apr_status_t sock_read(int fd, void *vbuf, size_t buf_size)

{

char *buf = vbuf;

int rc;

size_t bytes_read = 0;

do {

do {

rc = read(fd, buf + bytes_read, buf_size - bytes_read);

} while (rc < 0 && errno == EINTR);

switch(rc) {

case -1:

return errno;

case 0: /* unexpected */

return ECONNRESET;

default:

bytes_read += rc;

}

} while (bytes_read < buf_size);

return APR_SUCCESS;

}

static apr_status_t sock_write(int fd, const void *buf, size_t buf_size)

{

int rc;

do {

rc = write(fd, buf, buf_size);

} while (rc < 0 && errno == EINTR);

if (rc < 0) {

return errno;

}

return APR_SUCCESS;

}

static apr_status_t get_req(int fd, request_rec *r, char **argv0, char ***env,

cgid_req_t *req)

{

int i;

char *user;

char **environ;

core_dir_config *temp_core;

void **dconf;

apr_status_t stat;

r->server = apr_pcalloc(r->pool, sizeof(server_rec));

/* read the request header */

stat = sock_read(fd, req, sizeof(*req));

if (stat != APR_SUCCESS) {

return stat;

}

r->server->loglevel = req->loglevel;

if (req->req_type == GETPID_REQ) {

/* no more data sent for this request */

return APR_SUCCESS;

}

/* handle module indexes and such */

dconf = (void **) apr_pcalloc(r->pool, sizeof(void *) * (total_modules + DYNAMIC_MODULE_LIMIT));

temp_core = (core_dir_config *)apr_palloc(r->pool, sizeof(core_module));

dconf[req->core_module_index] = (void *)temp_core;

if (req->have_suexec) {

dconf[req->suexec_module_index] = &req->suexec_cfg;

}

r->per_dir_config = (ap_conf_vector_t *)dconf;

/* Read the filename, argv0, uri, and args */

r->filename = apr_pcalloc(r->pool, req->filename_len + 1);

*argv0 = apr_pcalloc(r->pool, req->argv0_len + 1);

r->uri = apr_pcalloc(r->pool, req->uri_len + 1);

if ((stat = sock_read(fd, r->filename, req->filename_len)) != APR_SUCCESS ||

(stat = sock_read(fd, *argv0, req->argv0_len)) != APR_SUCCESS ||

(stat = sock_read(fd, r->uri, req->uri_len)) != APR_SUCCESS) {

return stat;

}

r->args = apr_pcalloc(r->pool, req->args_len + 1); /* empty string if no args */

if (req->args_len) {

if ((stat = sock_read(fd, r->args, req->args_len)) != APR_SUCCESS) {

return stat;

}

}

/* read the environment variables */

environ = apr_pcalloc(r->pool, (req->env_count + 2) *sizeof(char *));

for (i = 0; i < req->env_count; i++) {

apr_size_t curlen;

if ((stat = sock_read(fd, &curlen, sizeof(curlen))) != APR_SUCCESS) {

return stat;

}

environ[i] = apr_pcalloc(r->pool, curlen + 1);

if ((stat = sock_read(fd, environ[i], curlen)) != APR_SUCCESS) {

return stat;

}

}

*env = environ;

/* basic notes table to avoid segfaults */

r->notes = apr_table_make(r->pool, 1);

/* mod_userdir requires the mod_userdir_user note */

if (req->mod_userdir_user_len) {

user = apr_pcalloc(r->pool, req->mod_userdir_user_len + 1); /* last byte is '\0' */

stat = sock_read(fd, user, req->mod_userdir_user_len);

if (stat != APR_SUCCESS) {

return stat;

}

apr_table_set(r->notes, "mod_userdir_user", (const char *)user);

}

#if 0

#ifdef RLIMIT_CPU

sock_read(fd, &j, sizeof(int));

if (j) {

temp_core->limit_cpu = (struct rlimit *)apr_palloc (sizeof(struct rlimit));

sock_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)

sock_read(fd, &j, sizeof(int));

if (j) {

temp_core->limit_mem = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit));

sock_read(fd, temp_core->limit_mem, sizeof(struct rlimit));

}

else {

temp_core->limit_mem = NULL;

}

#endif

#ifdef RLIMIT_NPROC

sock_read(fd, &j, sizeof(int));

if (j) {

temp_core->limit_nproc = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit));

sock_read(fd, temp_core->limit_nproc, sizeof(struct rlimit));

}

else {

temp_core->limit_nproc = NULL;

}

#endif

#endif

return APR_SUCCESS;

}

static apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,

int req_type)

{

int i;

const char *user;

module *suexec_mod = ap_find_linked_module("mod_suexec.c");

cgid_req_t req = {0};

suexec_config_t *suexec_cfg;

apr_status_t stat;

req.req_type = req_type;

req.conn_id = r->connection->id;

req.core_module_index = core_module.module_index;

if (suexec_mod) {

req.have_suexec = 1;

req.suexec_module_index = suexec_mod->module_index;

suexec_cfg = ap_get_module_config(r->per_dir_config,

suexec_mod);

req.suexec_cfg = *suexec_cfg;

}

for (req.env_count = 0; env[req.env_count]; req.env_count++) {

continue;

}

req.filename_len = strlen(r->filename);

req.argv0_len = strlen(argv0);

req.uri_len = strlen(r->uri);

req.args_len = r->args ? strlen(r->args) : 0;

user = (const char *)apr_table_get(r->notes, "mod_userdir_user");

if (user != NULL) {

req.mod_userdir_user_len = strlen(user);

}

req.loglevel = r->server->loglevel;

/* Write the request header */

if ((stat = sock_write(fd, &req, sizeof(req))) != APR_SUCCESS) {

return stat;

}

/* Write filename, argv0, uri, and args */

if ((stat = sock_write(fd, r->filename, req.filename_len)) != APR_SUCCESS ||

(stat = sock_write(fd, argv0, req.argv0_len)) != APR_SUCCESS ||

(stat = sock_write(fd, r->uri, req.uri_len)) != APR_SUCCESS) {

return stat;

}

if (req.args_len) {

if ((stat = sock_write(fd, r->args, req.args_len)) != APR_SUCCESS) {

return stat;

}

}

/* write the environment variables */

for (i = 0; i < req.env_count; i++) {

apr_size_t curlen = strlen(env[i]);

if ((stat = sock_write(fd, &curlen, sizeof(curlen))) != APR_SUCCESS) {

return stat;

}

if ((stat = sock_write(fd, env[i], curlen)) != APR_SUCCESS) {

return stat;

}

}

/* send a minimal notes table */

if (user) {

if ((stat = sock_write(fd, user, req.mod_userdir_user_len)) != APR_SUCCESS) {

return stat;

}

}

#if 0

#ifdef RLIMIT_CPU

if (conf->limit_cpu) {

len = 1;

stat = sock_write(fd, &len, sizeof(int));

stat = sock_write(fd, conf->limit_cpu, sizeof(struct rlimit));

}

else {

len = 0;

stat = sock_write(fd, &len, sizeof(int));

}

#endif

#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)

if (conf->limit_mem) {

len = 1;

stat = sock_write(fd, &len, sizeof(int));

stat = sock_write(fd, conf->limit_mem, sizeof(struct rlimit));

}

else {

len = 0;

stat = sock_write(fd, &len, sizeof(int));

}

#endif

#ifdef RLIMIT_NPROC

if (conf->limit_nproc) {

len = 1;

stat = sock_write(fd, &len, sizeof(int));

stat = sock_write(fd, conf->limit_nproc, sizeof(struct rlimit));

}

else {

len = 0;

stat = sock_write(fd, &len, sizeof(int));

}

#endif

#endif

return APR_SUCCESS;

}

static void daemon_signal_handler(int sig)

{

if (sig == SIGHUP) {

++daemon_should_exit;

}

}

static void cgid_child_errfn(apr_pool_t *pool, apr_status_t err,

const char *description)

{

request_rec *r;

void *vr;

apr_pool_userdata_get(&vr, ERRFN_USERDATA_KEY, pool);

r = vr;

/* sure we got r, but don't call ap_log_rerror() because we don't

ap_log_error(APLOG_MARK, APLOG_ERR, err, r->server, "%s", description);

}

static int cgid_server(void *data)

{

struct sockaddr_un unix_addr;

int sd, sd2, rc;

mode_t omask;

apr_socklen_t len;

apr_pool_t *ptrans;

server_rec *main_server = data;

cgid_server_conf *sconf = ap_get_module_config(main_server->module_config,

&cgid_module);

apr_hash_t *script_hash = apr_hash_make(pcgi);

apr_pool_create(&ptrans, pcgi);

apr_signal(SIGCHLD, SIG_IGN);

apr_signal(SIGHUP, daemon_signal_handler);

if (unlink(sconf->sockname) < 0 && errno != ENOENT) {

ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,

"Couldn't unlink unix domain socket %s",

sconf->sockname);

/* just a warning; don't bail out */

}

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");

return errno;

}

memset(&unix_addr, 0, sizeof(unix_addr));

unix_addr.sun_family = AF_UNIX;

strcpy(unix_addr.sun_path, sconf->sockname);

omask = umask(0077); /* so that only Apache can use socket */

rc = bind(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr));

umask(omask); /* can't fail, so can't clobber errno */

if (rc < 0) {

ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,

"Couldn't bind unix domain socket %s",

sconf->sockname);

return errno;

}

if (listen(sd, DEFAULT_CGID_LISTENBACKLOG) < 0) {

ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,

"Couldn't listen on unix domain socket");

return errno;

}

if (!geteuid()) {

if (chown(sconf->sockname, unixd_config.user_id, -1) < 0) {

ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server,

"Couldn't change owner of unix domain socket %s",

sconf->sockname);

return errno;

}

}

unixd_setup_child(); /* if running as root, switch to configured user/group */

while (!daemon_should_exit) {

int errfileno = STDERR_FILENO;

char *argv0;

char **env;

const char * const *argv;

apr_int32_t in_pipe;

apr_int32_t out_pipe;

apr_int32_t err_pipe;

apr_cmdtype_e cmd_type;

request_rec *r;

apr_procattr_t *procattr = NULL;

apr_proc_t *procnew = NULL;

apr_file_t *inout;

cgid_req_t cgid_req;

apr_status_t stat;

apr_pool_clear(ptrans);

len = sizeof(unix_addr);

sd2 = accept(sd, (struct sockaddr *)&unix_addr, &len);

if (sd2 < 0) {

if (errno != EINTR) {

ap_log_error(APLOG_MARK, APLOG_ERR, errno,

(server_rec *)data,

"Error accepting on cgid socket");

}

continue;

}

r = apr_pcalloc(ptrans, sizeof(request_rec));

procnew = apr_pcalloc(ptrans, sizeof(*procnew));

r->pool = ptrans;

stat = get_req(sd2, r, &argv0, &env, &cgid_req);

if (stat != APR_SUCCESS) {

ap_log_error(APLOG_MARK, APLOG_ERR, stat,

main_server,

"Error reading request on cgid socket");

close(sd2);

continue;

}

if (cgid_req.req_type == GETPID_REQ) {

pid_t pid;

pid = (pid_t)apr_hash_get(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id));

if (write(sd2, &pid, sizeof(pid)) != sizeof(pid)) {

ap_log_error(APLOG_MARK, APLOG_ERR, 0,

main_server,

"Error writing pid %" APR_PID_T_FMT " to handler", pid);

}

close(sd2);

continue;

}

apr_os_file_put(&r->server->error_log, &errfileno, 0, r->pool);

apr_os_file_put(&inout, &sd2, 0, r->pool);

if (cgid_req.req_type == SSI_REQ) {

in_pipe = APR_NO_PIPE;

out_pipe = APR_FULL_BLOCK;

err_pipe = APR_NO_PIPE;

cmd_type = APR_SHELLCMD;

}

else {

in_pipe = APR_CHILD_BLOCK;

out_pipe = APR_CHILD_BLOCK;

err_pipe = APR_CHILD_BLOCK;

cmd_type = APR_PROGRAM;

}

if (((rc = apr_procattr_create(&procattr, ptrans)) != APR_SUCCESS) ||

((cgid_req.req_type == CGI_REQ) &&

(((rc = apr_procattr_io_set(procattr,

in_pipe,

out_pipe,

err_pipe)) != APR_SUCCESS) ||

/* XXX apr_procattr_child_*_set() is creating an unnecessary

((rc = apr_procattr_child_err_set(procattr, r->server->error_log, NULL)) != APR_SUCCESS) ||

((rc = apr_procattr_child_in_set(procattr, inout, NULL)) != APR_SUCCESS))) ||

((rc = apr_procattr_child_out_set(procattr, inout, NULL)) != APR_SUCCESS) ||

((rc = apr_procattr_dir_set(procattr,

ap_make_dirstr_parent(r->pool, r->filename))) != APR_SUCCESS) ||

((rc = apr_procattr_cmdtype_set(procattr, cmd_type)) != APR_SUCCESS) ||

((rc = apr_procattr_child_errfn_set(procattr, cgid_child_errfn)) != APR_SUCCESS)) {

/* Something bad happened, tell the world.

ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server,

"couldn't set child process attributes: %s", r->filename);

}

else {

apr_pool_userdata_set(r, ERRFN_USERDATA_KEY, apr_pool_cleanup_null, ptrans);

argv = (const char * const *)create_argv(r->pool, NULL, NULL, NULL, argv0, r->args);

/* We want to close sd2 for the new CGI process too.

close(sd2);

rc = ap_os_create_privileged_process(r, procnew, argv0, argv,

(const char * const *)env,

procattr, ptrans);

if (rc != APR_SUCCESS) {

/* Bad things happened. Everyone should have cleaned up.

ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server,

"couldn't create child process: %d: %s", rc,

apr_filepath_name_get(r->filename));

}

else {

apr_hash_set(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id),

(void *)procnew->pid);

}

}

}

return -1;

}

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);

}

cgid_server(main_server);

exit(-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_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;

root_server = main_server;

root_pool = p;

apr_pool_userdata_get((void **)&procnew, userdata_key, main_server->process->pool);

if (!procnew) {

first_time = 1;

procnew = apr_pcalloc(p, 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);

}

if (!first_time) {

total_modules = 0;

for (m = ap_preloaded_modules; *m != NULL; m++)

total_modules++;

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

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;

c->sockname = ap_server_root_relative(p, DEFAULT_SOCKET);

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)

{

server_rec *s = cmd->server;

cgid_server_conf *conf = ap_get_module_config(s->module_config,

&cgid_module);

conf->sockname = ap_server_root_relative(cmd->pool, arg);

if (!conf->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;

APR_BRIGADE_FOREACH(e, bb) {

if (APR_BUCKET_IS_EOS(e)) {

break;

}

rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ);

if (!APR_STATUS_IS_SUCCESS(rv) || (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 apr_status_t close_unix_socket(void *thefd)

{

int fd = (int)thefd;

return close(fd);

}

static int connect_to_daemon(int *sdptr, request_rec *r,

cgid_server_conf *conf)

{

struct sockaddr_un unix_addr;

int sd;

int connect_tries;

apr_interval_time_t sliding_timer;

memset(&unix_addr, 0, sizeof(unix_addr));

unix_addr.sun_family = AF_UNIX;

strcpy(unix_addr.sun_path, conf->sockname);

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 *)&unix_addr, sizeof(unix_addr)) < 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 *)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;

APR_BRIGADE_FOREACH(e, bb) {

if (APR_BUCKET_IS_EOS(e)) {

break;

}

rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ);

if (!APR_STATUS_IS_SUCCESS(rv)) {

break;

}

}

}

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 {

if (kill(pid, 0) < 0) {

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.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;

if (r->method_number == M_OPTIONS) {

/* 99 out of 100 cgid scripts, this is all they support */

r->allowed |= (AP_METHOD_BIT << M_GET);

r->allowed |= (AP_METHOD_BIT << M_POST);

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));

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, 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");

}

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

apr_os_pipe_put(&tempsock, &sd, r->pool);

if ((argv0 = strrchr(r->filename, '/')) != NULL)

argv0++;

else

argv0 = r->filename;

/* Transfer any put/post args, CERN style...

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) {

return rv;

}

APR_BRIGADE_FOREACH(bucket, bb) {

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

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;

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))) {

return log_script(r, conf, ret, dbuf, sbuf, bb, NULL);

}

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

r->method = apr_pstrdup(r->pool, "GET");

r->method_number = M_GET;

/* We already read the message body (if any), so don't allow

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

discard_script_output(bb);

apr_brigade_destroy(bb);

return HTTP_MOVED_TEMPORARILY;

}

/* Passing our socket down the filter chain in a pipe bucket

apr_pool_cleanup_kill(r->pool, (void *)sd, close_unix_socket);

ap_pass_brigade(r->output_filters, bb);

}

if (nph) {

struct ap_filter_t *cur;

/* Passing our socket down the filter chain in a pipe bucket

apr_pool_cleanup_kill(r->pool, (void *)sd, close_unix_socket);

/* get rid of all filters up through protocol... since we

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. */

}

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

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;

}

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

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

apr_os_pipe_put(&tempsock, &sd, r->pool);

/* Passing our socket down the filter chain in a pipe bucket

apr_pool_cleanup_kill(r->pool, (void *)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 (!APR_STATUS_IS_SUCCESS(rv)) {

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 (!APR_STATUS_IS_SUCCESS(rv)) {

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;

}

static void register_hook(apr_pool_t *p)

{

static const char * const aszPre[] = { "mod_include.c", NULL };

ap_hook_post_config(cgid_init, aszPre, NULL, APR_HOOK_MIDDLE);

ap_hook_handler(cgid_handler, NULL, NULL, APR_HOOK_MIDDLE);

}

module AP_MODULE_DECLARE_DATA 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 */

register_hook /* register_handlers */

};