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-rw-r--r--modules/generators/mod_cgid.c1978
1 files changed, 1978 insertions, 0 deletions
diff --git a/modules/generators/mod_cgid.c b/modules/generators/mod_cgid.c
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index 0000000..2258a68
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+++ b/modules/generators/mod_cgid.c
@@ -0,0 +1,1978 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * http_script: keeps all script-related ramblings together.
+ *
+ * Compliant to cgi/1.1 spec
+ *
+ * Adapted by rst from original NCSA code by Rob McCool
+ *
+ * This modules uses a httpd core function (ap_add_common_vars) to add some new env vars,
+ * like REDIRECT_URL and REDIRECT_QUERY_STRING for custom error responses and DOCUMENT_ROOT.
+ * It also adds SERVER_ADMIN - useful for scripts to know who to mail when they fail.
+ *
+ */
+
+#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
+
+#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 "mpm_common.h"
+#include "mod_suexec.h"
+#include "../filters/mod_include.h"
+
+#include "mod_core.h"
+
+
+/* ### should be tossed in favor of APR */
+#include <sys/stat.h>
+#include <sys/un.h> /* for sockaddr_un */
+
+#if APR_HAVE_STRUCT_RLIMIT
+#if defined (RLIMIT_CPU) || defined (RLIMIT_NPROC) || defined (RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
+#define AP_CGID_USE_RLIMIT
+#endif
+#endif
+
+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 pid_t daemon_pid;
+static int daemon_should_exit = 0;
+static server_rec *root_server = NULL;
+static apr_pool_t *root_pool = NULL;
+static const char *sockname;
+static struct sockaddr_un *server_addr;
+static apr_socklen_t server_addr_len;
+static pid_t parent_pid;
+static ap_unix_identity_t empty_ugid = { (uid_t)-1, (gid_t)-1, -1 };
+
+typedef struct {
+ apr_interval_time_t timeout;
+} cgid_dirconf;
+
+/* The APR other-child API doesn't tell us how the daemon exited
+ * (SIGSEGV vs. exit(1)). The other-child maintenance function
+ * needs to decide whether to restart the daemon after a failure
+ * based on whether or not it exited due to a fatal startup error
+ * or something that happened at steady-state. This exit status
+ * is unlikely to collide with exit signals.
+ */
+#define DAEMON_STARTUP_ERROR 254
+
+/* Read and discard the data in the brigade produced by a CGI script */
+static void discard_script_output(apr_bucket_brigade *bb);
+
+/* This doer will only ever be called when we are sure that we have
+ * a valid ugid.
+ */
+static ap_unix_identity_t *cgid_suexec_id_doer(const request_rec *r)
+{
+ return (ap_unix_identity_t *)
+ ap_get_module_config(r->request_config, &cgid_module);
+}
+
+/* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
+ * 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 = apr_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 "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"
+
+/* DEFAULT_CGID_LISTENBACKLOG controls the max depth on the unix socket's
+ * pending connection queue. If a bunch of cgi requests arrive at about
+ * the same time, connections from httpd threads/processes will back up
+ * in the queue while the cgid process slowly forks off a child to process
+ * each connection on the unix socket. If the queue is too short, the
+ * httpd process will get ECONNREFUSED when trying to connect.
+ */
+#ifndef DEFAULT_CGID_LISTENBACKLOG
+#define DEFAULT_CGID_LISTENBACKLOG 100
+#endif
+
+/* DEFAULT_CONNECT_ATTEMPTS controls how many times we'll try to connect
+ * to the cgi daemon from the thread/process handling the cgi request.
+ * Generally we want to retry when we get ECONNREFUSED since it is
+ * probably because the listen queue is full. We need to try harder so
+ * the client doesn't see it as a 503 error.
+ *
+ * Set this to 0 to continually retry until the connect works or Apache
+ * terminates.
+ */
+#ifndef DEFAULT_CONNECT_ATTEMPTS
+#define DEFAULT_CONNECT_ATTEMPTS 15
+#endif
+
+#ifndef DEFAULT_CONNECT_STARTUP_DELAY
+#define DEFAULT_CONNECT_STARTUP_DELAY 60
+#endif
+
+typedef struct {
+ const char *logname;
+ long logbytes;
+ int bufbytes;
+} cgid_server_conf;
+
+#ifdef AP_CGID_USE_RLIMIT
+typedef struct {
+#ifdef RLIMIT_CPU
+ int limit_cpu_set;
+ struct rlimit limit_cpu;
+#endif
+#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS)
+ int limit_mem_set;
+ struct rlimit limit_mem;
+#endif
+#ifdef RLIMIT_NPROC
+ int limit_nproc_set;
+ struct rlimit limit_nproc;
+#endif
+
+} cgid_rlimit_t;
+#endif
+
+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
+ * to find the script pid when it is time for that
+ * process to be cleaned up
+ */
+ pid_t ppid; /* sanity check for config problems leading to
+ * wrong cgid socket use
+ */
+ int env_count;
+ ap_unix_identity_t ugid;
+ apr_size_t filename_len;
+ apr_size_t argv0_len;
+ apr_size_t uri_len;
+ apr_size_t args_len;
+ int loglevel; /* to stuff in server_rec */
+
+#ifdef AP_CGID_USE_RLIMIT
+ cgid_rlimit_t limits;
+#endif
+} cgid_req_t;
+
+/* 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.
+ *
+ * Do not process the args if they containing an '=' assignment.
+ */
+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 (!(*args) || 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, '+');
+ 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;
+ int mpm_state;
+ int stopping;
+
+ switch (reason) {
+ case APR_OC_REASON_DEATH:
+ apr_proc_other_child_unregister(data);
+ /* If apache is not terminating or restarting,
+ * restart the cgid daemon
+ */
+ stopping = 1; /* if MPM doesn't support query,
+ * assume we shouldn't restart daemon
+ */
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state) == APR_SUCCESS &&
+ mpm_state != AP_MPMQ_STOPPING) {
+ stopping = 0;
+ }
+ if (!stopping) {
+ if (status == DAEMON_STARTUP_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(01238)
+ "cgid daemon failed to initialize");
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(01239)
+ "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
+ * up when pconf gets cleaned up
+ */
+ kill(proc->pid, SIGHUP); /* send signal to daemon telling it to die */
+
+ /* Remove the cgi socket, we must do it here in order to try and
+ * guarantee the same permissions as when the socket was created.
+ */
+ if (unlink(sockname) < 0 && errno != ENOENT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, ap_server_conf, APLOGNO(01240)
+ "Couldn't unlink unix domain socket %s",
+ sockname);
+ }
+ break;
+ }
+}
+#endif
+
+static apr_status_t close_unix_socket(void *thefd)
+{
+ int fd = (int)((long)thefd);
+
+ return close(fd);
+}
+
+/* deal with incomplete reads and signals
+ * assume you really have to read buf_size bytes
+ */
+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;
+}
+
+/* deal with signals
+ */
+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 sock_writev(int fd, request_rec *r, int count, ...)
+{
+ va_list ap;
+ int rc;
+ struct iovec *vec;
+ int i;
+
+ vec = (struct iovec *)apr_palloc(r->pool, count * sizeof(struct iovec));
+ va_start(ap, count);
+ for (i = 0; i < count; i++) {
+ vec[i].iov_base = va_arg(ap, caddr_t);
+ vec[i].iov_len = va_arg(ap, apr_size_t);
+ }
+ va_end(ap);
+
+ do {
+ rc = writev(fd, vec, count);
+ } 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 **environ;
+ core_request_config *temp_core;
+ void **rconf;
+ 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->log.level = req->loglevel;
+ if (req->req_type == GETPID_REQ) {
+ /* no more data sent for this request */
+ return APR_SUCCESS;
+ }
+
+ /* handle module indexes and such */
+ rconf = (void **)ap_create_request_config(r->pool);
+
+ temp_core = (core_request_config *)apr_palloc(r->pool, sizeof(core_module));
+ rconf[AP_CORE_MODULE_INDEX] = (void *)temp_core;
+ r->request_config = (ap_conf_vector_t *)rconf;
+ ap_set_module_config(r->request_config, &cgid_module, (void *)&req->ugid);
+
+ /* 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;
+
+#ifdef AP_CGID_USE_RLIMIT
+ if ((stat = sock_read(fd, &(req->limits), sizeof(cgid_rlimit_t))) != APR_SUCCESS)
+ return stat;
+#endif
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t send_req(int fd, request_rec *r, char *argv0, char **env,
+ int req_type)
+{
+ int i;
+ cgid_req_t req = {0};
+ apr_status_t stat;
+ ap_unix_identity_t * ugid = ap_run_get_suexec_identity(r);
+ core_dir_config *core_conf = ap_get_core_module_config(r->per_dir_config);
+
+
+ if (ugid == NULL) {
+ req.ugid = empty_ugid;
+ } else {
+ memcpy(&req.ugid, ugid, sizeof(ap_unix_identity_t));
+ }
+
+ req.req_type = req_type;
+ req.ppid = parent_pid;
+ req.conn_id = r->connection->id;
+ 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;
+ req.loglevel = r->server->log.level;
+
+ /* Write the request header */
+ if (req.args_len) {
+ stat = sock_writev(fd, r, 5,
+ &req, sizeof(req),
+ r->filename, req.filename_len,
+ argv0, req.argv0_len,
+ r->uri, req.uri_len,
+ r->args, req.args_len);
+ } else {
+ stat = sock_writev(fd, r, 4,
+ &req, sizeof(req),
+ r->filename, req.filename_len,
+ argv0, req.argv0_len,
+ r->uri, req.uri_len);
+ }
+
+ if (stat != 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_writev(fd, r, 2, &curlen, sizeof(curlen),
+ env[i], curlen)) != APR_SUCCESS) {
+ return stat;
+ }
+ }
+#if defined(RLIMIT_CPU) && defined(AP_CGID_USE_RLIMIT)
+ if (core_conf->limit_cpu) {
+ req.limits.limit_cpu = *(core_conf->limit_cpu);
+ req.limits.limit_cpu_set = 1;
+ }
+ else {
+ req.limits.limit_cpu_set = 0;
+ }
+#endif
+
+#if defined(AP_CGID_USE_RLIMIT) && (defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS))
+ if (core_conf->limit_mem) {
+ req.limits.limit_mem = *(core_conf->limit_mem);
+ req.limits.limit_mem_set = 1;
+ }
+ else {
+ req.limits.limit_mem_set = 0;
+ }
+
+#endif
+
+#if defined(RLIMIT_NPROC) && defined(AP_CGID_USE_RLIMIT)
+ if (core_conf->limit_nproc) {
+ req.limits.limit_nproc = *(core_conf->limit_nproc);
+ req.limits.limit_nproc_set = 1;
+ }
+ else {
+ req.limits.limit_nproc_set = 0;
+ }
+#endif
+
+#ifdef AP_CGID_USE_RLIMIT
+ if ( (stat = sock_write(fd, &(req.limits), sizeof(cgid_rlimit_t))) != APR_SUCCESS)
+ return stat;
+#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
+ * have r->headers_in and possibly other storage referenced by
+ * ap_log_rerror()
+ */
+ ap_log_error(APLOG_MARK, APLOG_ERR, err, r->server, APLOGNO(01241) "%s", description);
+}
+
+static int cgid_server(void *data)
+{
+ int sd, sd2, rc;
+ mode_t omask;
+ apr_pool_t *ptrans;
+ server_rec *main_server = data;
+ apr_hash_t *script_hash = apr_hash_make(pcgi);
+ apr_status_t rv;
+
+ apr_pool_create(&ptrans, pcgi);
+ apr_pool_tag(ptrans, "cgid_ptrans");
+
+ apr_signal(SIGCHLD, SIG_IGN);
+ apr_signal(SIGHUP, daemon_signal_handler);
+
+ /* Close our copy of the listening sockets */
+ ap_close_listeners();
+
+ /* cgid should use its own suexec doer */
+ ap_hook_get_suexec_identity(cgid_suexec_id_doer, NULL, NULL,
+ APR_HOOK_REALLY_FIRST);
+ apr_hook_sort_all();
+
+ if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, APLOGNO(01242)
+ "Couldn't create unix domain socket");
+ return errno;
+ }
+
+ apr_pool_cleanup_register(pcgi, (void *)((long)sd),
+ close_unix_socket, close_unix_socket);
+
+ omask = umask(0077); /* so that only Apache can use socket */
+ rc = bind(sd, (struct sockaddr *)server_addr, server_addr_len);
+ umask(omask); /* can't fail, so can't clobber errno */
+ if (rc < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, APLOGNO(01243)
+ "Couldn't bind unix domain socket %s",
+ sockname);
+ return errno;
+ }
+
+ /* Not all flavors of unix use the current umask for AF_UNIX perms */
+ rv = apr_file_perms_set(sockname, APR_FPROT_UREAD|APR_FPROT_UWRITE|APR_FPROT_UEXECUTE);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, main_server, APLOGNO(01244)
+ "Couldn't set permissions on unix domain socket %s",
+ sockname);
+ return rv;
+ }
+
+ if (listen(sd, DEFAULT_CGID_LISTENBACKLOG) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, APLOGNO(01245)
+ "Couldn't listen on unix domain socket");
+ return errno;
+ }
+
+ if (!geteuid()) {
+ if (chown(sockname, ap_unixd_config.user_id, -1) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, APLOGNO(01246)
+ "Couldn't change owner of unix domain socket %s",
+ sockname);
+ return errno;
+ }
+ }
+
+ /* if running as root, switch to configured user/group */
+ if ((rc = ap_run_drop_privileges(pcgi, ap_server_conf)) != 0) {
+ return rc;
+ }
+
+ while (!daemon_should_exit) {
+ int errfileno = STDERR_FILENO;
+ char *argv0 = NULL;
+ char **env = NULL;
+ 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;
+ void *key;
+ apr_socklen_t len;
+ struct sockaddr_un unix_addr;
+
+ apr_pool_clear(ptrans);
+
+ len = sizeof(unix_addr);
+ sd2 = accept(sd, (struct sockaddr *)&unix_addr, &len);
+ if (sd2 < 0) {
+#if defined(ENETDOWN)
+ if (errno == ENETDOWN) {
+ /* The network has been shut down, no need to continue. Die gracefully */
+ ++daemon_should_exit;
+ }
+#endif
+ if (errno != EINTR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno,
+ (server_rec *)data, APLOGNO(01247)
+ "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, APLOGNO(01248)
+ "Error reading request on cgid socket");
+ close(sd2);
+ continue;
+ }
+
+ if (cgid_req.ppid != parent_pid) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, 0, main_server, APLOGNO(01249)
+ "CGI request received from wrong server instance; "
+ "see ScriptSock directive");
+ close(sd2);
+ continue;
+ }
+
+ if (cgid_req.req_type == GETPID_REQ) {
+ pid_t pid;
+ apr_status_t rv;
+
+ pid = (pid_t)((long)apr_hash_get(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id)));
+ rv = sock_write(sd2, &pid, sizeof(pid));
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv,
+ main_server, APLOGNO(01250)
+ "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
+ * pipe between this process and the child being created...
+ * It is cleaned up with the temporary pool for this request.
+ */
+ ((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) ||
+#ifdef AP_CGID_USE_RLIMIT
+#ifdef RLIMIT_CPU
+ ( (cgid_req.limits.limit_cpu_set) && ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_CPU,
+ &cgid_req.limits.limit_cpu)) != APR_SUCCESS)) ||
+#endif
+#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
+ ( (cgid_req.limits.limit_mem_set) && ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_MEM,
+ &cgid_req.limits.limit_mem)) != APR_SUCCESS)) ||
+#endif
+#ifdef RLIMIT_NPROC
+ ( (cgid_req.limits.limit_nproc_set) && ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_NPROC,
+ &cgid_req.limits.limit_nproc)) != APR_SUCCESS)) ||
+#endif
+#endif
+
+ ((rc = apr_procattr_child_errfn_set(procattr, cgid_child_errfn)) != APR_SUCCESS)) {
+ /* Something bad happened, tell the world.
+ * 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, APLOGNO(01251)
+ "couldn't set child process attributes: %s", r->filename);
+
+ procnew->pid = 0; /* no process to clean up */
+ close(sd2);
+ }
+ 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.
+ * If it is left open it'll make ap_pass_brigade() block
+ * waiting for EOF if CGI forked something running long.
+ * close(sd2) here should be okay, as CGI channel
+ * is already dup()ed by apr_procattr_child_{in,out}_set()
+ * above.
+ */
+ 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, APLOGNO(01252)
+ "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_pmemdup(pcgi, &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, APLOGNO(01253)
+ "mod_cgid: Couldn't spawn cgid daemon process");
+ return DECLINED;
+ }
+ else if (daemon_pid == 0) {
+ if (pcgi == NULL) {
+ apr_pool_create(&pcgi, p);
+ apr_pool_tag(pcgi, "cgid_pcgi");
+ }
+ 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;
+ const char *userdata_key = "cgid_init";
+ 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) {
+ 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);
+ return ret;
+ }
+ else {
+ procnew = data;
+ }
+
+ if (ap_state_query(AP_SQ_MAIN_STATE) != AP_SQ_MS_CREATE_PRE_CONFIG) {
+ char *tmp_sockname;
+
+ parent_pid = getpid();
+ tmp_sockname = ap_runtime_dir_relative(p, sockname);
+ if (strlen(tmp_sockname) > sizeof(server_addr->sun_path) - 1) {
+ tmp_sockname[sizeof(server_addr->sun_path)] = '\0';
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server, APLOGNO(01254)
+ "The length of the ScriptSock path exceeds maximum, "
+ "truncating to %s", tmp_sockname);
+ }
+ sockname = tmp_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 void *create_cgid_dirconf(apr_pool_t *p, char *dummy)
+{
+ cgid_dirconf *c = (cgid_dirconf *) apr_pcalloc(p, sizeof(cgid_dirconf));
+ return c;
+}
+
+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_runtime_dir_relative(cmd->pool, sockname);
+
+ if (!sockname) {
+ return apr_pstrcat(cmd->pool, "Invalid ScriptSock path",
+ arg, NULL);
+ }
+
+ return NULL;
+}
+static const char *set_script_timeout(cmd_parms *cmd, void *dummy, const char *arg)
+{
+ cgid_dirconf *dc = dummy;
+
+ if (ap_timeout_parameter_parse(arg, &dc->timeout, "s") != APR_SUCCESS) {
+ return "CGIDScriptTimeout has wrong format";
+ }
+
+ 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."),
+ AP_INIT_TAKE1("CGIDScriptTimeout", set_script_timeout, NULL, RSRC_CONF | ACCESS_CONF,
+ "The amount of time to wait between successful reads from "
+ "the CGI script, in seconds."),
+
+ {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;
+
+ /* Intentional no APLOGNO */
+ /* Callee provides APLOGNO in error text */
+ 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_full(f, buf, len, NULL);
+ 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;
+ int connect_errno;
+ apr_interval_time_t sliding_timer;
+
+ connect_tries = 0;
+ sliding_timer = 100000; /* 100 milliseconds */
+ while (1) {
+ connect_errno = 0;
+ ++connect_tries;
+ if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,
+ APLOGNO(01255) "unable to create socket to cgi daemon");
+ }
+ if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {
+ /* Save errno for later */
+ connect_errno = errno;
+ /* ECONNREFUSED means the listen queue is full; ENOENT means that
+ * the cgid server either hasn't started up yet, or we're pointing
+ * at the wrong socket file */
+ if ((errno == ECONNREFUSED || errno == ENOENT) &&
+ connect_tries < DEFAULT_CONNECT_ATTEMPTS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, errno, r, APLOGNO(01256)
+ "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, APLOGNO(01257)
+ "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! */
+ }
+
+ /* If we didn't find the socket but the server was not recently restarted,
+ * chances are there's something wrong with the cgid daemon
+ */
+ if (connect_errno == ENOENT &&
+ apr_time_sec(apr_time_now() - ap_scoreboard_image->global->restart_time) >
+ DEFAULT_CONNECT_STARTUP_DELAY) {
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno,
+ apr_pstrcat(r->pool, APLOGNO(02833) "ScriptSock ", sockname, " does not exist", NULL));
+ }
+
+ /* gotta try again, but make sure the cgid daemon is still around */
+ if (connect_errno != ENOENT && kill(daemon_pid, 0) != 0) {
+ return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO(01258)
+ "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;
+
+ for (e = APR_BRIGADE_FIRST(bb);
+ e != APR_BRIGADE_SENTINEL(bb) && !APR_BUCKET_IS_EOS(e);
+ e = APR_BRIGADE_FIRST(bb))
+ {
+ if (apr_bucket_read(e, &buf, &len, APR_BLOCK_READ)) {
+ break;
+ }
+ apr_bucket_delete(e);
+ }
+}
+
+/****************************************************************
+ *
+ * Actual cgid handling...
+ */
+
+struct cleanup_script_info {
+ request_rec *r;
+ cgid_server_conf *conf;
+ pid_t pid;
+};
+
+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, APLOGNO(01259)
+ "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, APLOGNO(01260)
+ "CGI process %" APR_PID_T_FMT " didn't exit, sending SIGKILL again",
+ pid);
+ kill(pid, SIGKILL);
+
+ return APR_EGENERAL;
+}
+
+static apr_status_t get_cgi_pid(request_rec *r, cgid_server_conf *conf, pid_t *pid) {
+ cgid_req_t req = {0};
+ apr_status_t stat;
+ int rc, sd;
+
+ rc = connect_to_daemon(&sd, r, conf);
+ if (rc != OK) {
+ return APR_EGENERAL;
+ }
+
+ req.req_type = GETPID_REQ;
+ req.ppid = parent_pid;
+ req.conn_id = 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, r, APLOGNO(01261)
+ "daemon couldn't find CGI process for connection %lu",
+ r->connection->id);
+ return APR_EGENERAL;
+ }
+
+ return APR_SUCCESS;
+}
+
+
+static apr_status_t cleanup_script(void *vptr)
+{
+ struct cleanup_script_info *info = vptr;
+ return cleanup_nonchild_process(info->r, info->pid);
+}
+
+static int cgid_handler(request_rec *r)
+{
+ int retval, nph, dbpos;
+ char *argv0, *dbuf;
+ 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;
+ cgid_dirconf *dc;
+
+ 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);
+ dc = ap_get_module_config(r->per_dir_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, APLOGNO(01262)
+ "Options ExecCGI is off in this directory");
+ }
+
+ if (nph && is_included) {
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01263)
+ "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 == APR_NOFILE) {
+ return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, APLOGNO(01264)
+ "script not found or unable to stat");
+ }
+#endif
+ if (r->finfo.filetype == APR_DIR) {
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01265)
+ "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, APLOGNO(01266)
+ "AcceptPathInfo off disallows user's path");
+ }
+ /*
+ if (!ap_suexec_enabled) {
+ if (!ap_can_exec(&r->finfo))
+ return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, APLOGNO(01267)
+ "file permissions deny server execution");
+ }
+ */
+
+ /*
+ * httpd core function used to add common environment variables like
+ * DOCUMENT_ROOT.
+ */
+ 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, APLOGNO(01268)
+ "write to cgi daemon process");
+ }
+
+ info = apr_palloc(r->pool, sizeof(struct cleanup_script_info));
+ info->conf = conf;
+ info->r = r;
+ rv = get_cgi_pid(r, conf, &(info->pid));
+
+ if (APR_SUCCESS == rv){
+ apr_pool_cleanup_register(r->pool, info,
+ cleanup_script,
+ apr_pool_cleanup_null);
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "error determining cgi PID");
+ }
+
+ /* 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);
+ if (dc->timeout > 0) {
+ apr_file_pipe_timeout_set(tempsock, dc->timeout);
+ }
+ else {
+ apr_file_pipe_timeout_set(tempsock, r->server->timeout);
+ }
+ apr_pool_cleanup_kill(r->pool, (void *)((long)sd), close_unix_socket);
+
+ /* 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;
+ dbuf = NULL;
+ dbpos = 0;
+ if (conf->logname) {
+ dbuf = apr_palloc(r->pool, conf->bufbytes + 1);
+ }
+ 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) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01270)
+ "Error reading request entity data");
+ return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
+ }
+
+ 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;
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02651)
+ "Error writing request body to script %s",
+ r->filename);
+
+ }
+ }
+ 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) {
+ conn_rec *c = r->connection;
+ 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_ex(r, bb, sbuf,
+ APLOG_MODULE_INDEX)))
+ {
+ 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 = "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) {
+ /* XXX: 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;
+ }
+
+ rv = ap_pass_brigade(r->output_filters, bb);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE1, rv, r,
+ "Failed to flush CGI output to client");
+ }
+ }
+
+ if (nph) {
+ conn_rec *c = r->connection;
+ 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);
+ cgid_dirconf *dc = ap_get_module_config(r->per_dir_config, &cgid_module);
+
+ struct cleanup_script_info *info;
+ apr_status_t rv;
+
+ 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->conf = conf;
+ info->r = r;
+ rv = get_cgi_pid(r, conf, &(info->pid));
+ if (APR_SUCCESS == rv) {
+ /* 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);
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "error determining cgi PID (for SSI)");
+ }
+
+ 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);
+ if (dc->timeout > 0) {
+ apr_file_pipe_timeout_set(tempsock, dc->timeout);
+ }
+ else {
+ apr_file_pipe_timeout_set(tempsock, r->server->timeout);
+ }
+
+ 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, APLOGNO(03196)
+ "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, APLOGNO(01271) "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, APLOGNO(01272)
+ "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, APLOGNO(01273) "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, APLOGNO(01274) "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,
+ create_cgid_dirconf, /* 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 */
+};
+