/* Copyright 1999-2004 The Apache Software Foundation * * Licensed 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 * * Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for * custom error responses, and DOCUMENT_ROOT because we found it useful. * It also adds SERVER_ADMIN - useful for scripts to know who to mail when * they fail. */ #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 #endif #if APR_HAVE_UNISTD_H #include #endif #if APR_HAVE_SYS_TYPES_H #include #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" /* ### should be tossed in favor of APR */ #include #include /* 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, apr_bucket_brigade **bb, request_rec *r, ap_filter_t *f, apr_bucket *head_ptr, apr_bucket **inserted_head); 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; /* Read and discard the data in the brigade produced by a CGI script */ static void discard_script_output(apr_bucket_brigade *bb); /* 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 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" /* 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 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 * to find the script pid when it is time for that * process to be cleaned up */ 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; /* 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 (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; 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) { 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 * up when pconf gets cleaned up */ kill(proc->pid, SIGHUP); /* send signal to daemon telling it to die */ break; } } #endif /* 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 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 * have r->headers_in and possibly other storage referenced by * ap_log_rerror() */ 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 * 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) || ((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, "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. * 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); 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_rerror() won't work because the header table used by * ap_log_rerror() hasn't been replicated in the phony r */ ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server, "couldn't create child process: %d: %s", rc, apr_filename_of_pathname(r->filename)); } else { /* 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. */ void *key; if (apr_hash_get(script_hash, &cgid_req.conn_id, sizeof(cgid_req.conn_id))) { key = &cgid_req.conn_id; } else { key = apr_pcalloc(pcgi, sizeof(cgid_req.conn_id)); memcpy(key, &cgid_req.conn_id, sizeof(cgid_req.conn_id)); } apr_hash_set(script_hash, key, sizeof(cgid_req.conn_id), (void *)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(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); } 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 * 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; 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; } } } /**************************************************************** * * Actual cgid handling... */ struct cleanup_script_info { request_rec *r; unsigned long conn_id; cgid_server_conf *conf; }; static apr_status_t dead_yet(pid_t pid, apr_interval_time_t max_wait) { apr_interval_time_t interval = 10000; /* 10 ms */ apr_interval_time_t total = 0; do { #ifdef _AIX /* On AIX, for processes like mod_cgid's script children where * SIGCHLD is ignored, kill(pid,0) returns success for up to * one second after the script child exits, based on when a * daemon runs to clean up unnecessary process table entries. * getpgid() can report the proper info (-1/ESRCH) immediately. */ if (getpgid(pid) < 0) { #else if (kill(pid, 0) < 0) { #endif return APR_SUCCESS; } apr_sleep(interval); total = total + interval; if (interval < 500000) { interval *= 2; } } while (total < max_wait); return APR_EGENERAL; } static apr_status_t cleanup_nonchild_process(request_rec *r, pid_t pid) { kill(pid, SIGTERM); /* in case it isn't dead yet */ if (dead_yet(pid, apr_time_from_sec(3)) == APR_SUCCESS) { return APR_SUCCESS; } ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "CGI process %" APR_PID_T_FMT " didn't exit, sending SIGKILL", pid); kill(pid, SIGKILL); if (dead_yet(pid, apr_time_from_sec(3)) == APR_SUCCESS) { return APR_SUCCESS; } ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "CGI process %" APR_PID_T_FMT " didn't exit, sending SIGKILL again", pid); kill(pid, SIGKILL); return APR_EGENERAL; } static apr_status_t cleanup_script(void *vptr) { struct cleanup_script_info *info = vptr; int sd; int rc; cgid_req_t req = {0}; pid_t pid; apr_status_t stat; rc = connect_to_daemon(&sd, info->r, info->conf); if (rc != OK) { return APR_EGENERAL; } /* we got a socket, and there is already a cleanup registered for it */ req.req_type = GETPID_REQ; req.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"); } /* if (!ap_suexec_enabled) { if (!ap_can_exec(&r->finfo)) return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, "file permissions deny server execution"); } */ ap_add_common_vars(r); ap_add_cgi_vars(r); env = ap_create_environment(r->pool, r->subprocess_env); if ((retval = connect_to_daemon(&sd, r, conf)) != OK) { return retval; } rv = send_req(sd, r, argv0, env, CGI_REQ); if (rv != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "write to cgi daemon process"); } info = apr_palloc(r->pool, sizeof(struct cleanup_script_info)); info->r = r; info->conn_id = r->connection->id; info->conf = conf; apr_pool_cleanup_register(r->pool, info, cleanup_script, apr_pool_cleanup_null); /* We are putting the socket discriptor into an apr_file_t so that we can * use a pipe bucket to send the data to the client. APR will create * a cleanup for the apr_file_t which will close the socket, so we'll * get rid of the cleanup we registered when we created the socket. */ apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool); apr_pool_cleanup_kill(r->pool, (void *)sd, close_unix_socket); if ((argv0 = strrchr(r->filename, '/')) != NULL) argv0++; else argv0 = r->filename; /* Transfer any put/post args, CERN style... * Note that we already ignore SIGPIPE in the core server. */ bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); seen_eos = 0; child_stopped_reading = 0; if (conf->logname) { dbuf = apr_palloc(r->pool, conf->bufbytes + 1); dbpos = 0; } do { apr_bucket *bucket; rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES, APR_BLOCK_READ, HUGE_STRING_LEN); if (rv != APR_SUCCESS) { 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 * elapses with no progress or an error occurs. */ rv = apr_file_write_full(tempsock, data, len, NULL); if (rv != APR_SUCCESS) { /* silly script stopped reading, soak up remaining message */ child_stopped_reading = 1; } } apr_brigade_cleanup(bb); } while (!seen_eos); if (conf->logname) { dbuf[dbpos] = '\0'; } /* we're done writing, or maybe we didn't write at all; * force EOF on child's stdin so that the cgi detects end (or * absence) of data */ shutdown(sd, 1); /* Handle script return... */ if (!nph) { const char *location; char sbuf[MAX_STRING_LEN]; int ret; bb = apr_brigade_create(r->pool, c->bucket_alloc); b = apr_bucket_pipe_create(tempsock, c->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); b = apr_bucket_eos_create(c->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); if ((ret = ap_scan_script_header_err_brigade(r, bb, sbuf))) { 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 * method was. */ r->method = apr_pstrdup(r->pool, "GET"); r->method_number = M_GET; /* We already read the message body (if any), so don't allow * the redirected request to think it has one. We can ignore * Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR. */ apr_table_unset(r->headers_in, "Content-Length"); ap_internal_redirect_handler(location, r); return OK; } else if (location && r->status == 200) { /* XX Note that if a script wants to produce its own Redirect * body, it now has to explicitly *say* "Status: 302" */ discard_script_output(bb); apr_brigade_destroy(bb); return HTTP_MOVED_TEMPORARILY; } ap_pass_brigade(r->output_filters, bb); } if (nph) { struct ap_filter_t *cur; /* get rid of all filters up through protocol... since we * haven't parsed off the headers, there is no way they can * work */ cur = r->proto_output_filters; while (cur && cur->frec->ftype < AP_FTYPE_CONNECTION) { cur = cur->next; } r->output_filters = r->proto_output_filters = cur; bb = apr_brigade_create(r->pool, c->bucket_alloc); b = apr_bucket_pipe_create(tempsock, c->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); b = apr_bucket_eos_create(c->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); ap_pass_brigade(r->output_filters, bb); } return OK; /* NOT r->status, even if it has changed. */ } /*============================================================================ *============================================================================ * This is the beginning of the cgi filter code moved from mod_include. This * is the code required to handle the "exec" SSI directive. *============================================================================ *============================================================================*/ static int include_cgi(char *s, request_rec *r, ap_filter_t *next, apr_bucket *head_ptr, apr_bucket **inserted_head) { request_rec *rr = ap_sub_req_lookup_uri(s, r, next); int rr_status; apr_bucket *tmp_buck, *tmp2_buck; if (rr->status != HTTP_OK) { ap_destroy_sub_req(rr); return -1; } /* No hardwired path info or query allowed */ if ((rr->path_info && rr->path_info[0]) || rr->args) { ap_destroy_sub_req(rr); return -1; } if (rr->finfo.filetype != APR_REG) { ap_destroy_sub_req(rr); return -1; } /* 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)) { apr_size_t len_loc; const char *location = apr_table_get(rr->headers_out, "Location"); conn_rec *c = r->connection; location = ap_escape_html(rr->pool, location); len_loc = strlen(location); /* XXX: if most of this stuff is going to get copied anyway, * it'd be more efficient to pstrcat it into a single pool buffer * and a single pool bucket */ tmp_buck = apr_bucket_immortal_create("bucket_alloc); APR_BUCKET_INSERT_BEFORE(head_ptr, tmp_buck); tmp2_buck = apr_bucket_heap_create(location, len_loc, NULL, c->bucket_alloc); APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); tmp2_buck = apr_bucket_immortal_create("\">", sizeof("\">") - 1, c->bucket_alloc); APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); tmp2_buck = apr_bucket_heap_create(location, len_loc, NULL, c->bucket_alloc); APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); tmp2_buck = apr_bucket_immortal_create("", sizeof("") - 1, c->bucket_alloc); APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); if (*inserted_head == NULL) { *inserted_head = tmp_buck; } } ap_destroy_sub_req(rr); return 0; } /* This is the special environment used for running the "exec cmd=" * variety of SSI directives. */ static void add_ssi_vars(request_rec *r, ap_filter_t *next) { 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, apr_bucket_brigade **bb, char *command, request_rec *r, ap_filter_t *f) { char **env; int sd; apr_status_t rc = APR_SUCCESS; int retval; apr_bucket_brigade *bcgi; apr_bucket *b; apr_file_t *tempsock = NULL; cgid_server_conf *conf = ap_get_module_config(r->server->module_config, &cgid_module); struct cleanup_script_info *info; add_ssi_vars(r, f->next); env = ap_create_environment(r->pool, r->subprocess_env); if ((retval = connect_to_daemon(&sd, r, conf)) != OK) { return retval; } SPLIT_AND_PASS_PRETAG_BUCKETS(*bb, ctx, f->next, rc); if (rc != APR_SUCCESS) { return rc; } send_req(sd, r, command, env, SSI_REQ); info = apr_palloc(r->pool, sizeof(struct cleanup_script_info)); info->r = r; info->conn_id = r->connection->id; info->conf = conf; /* for this type of request, the script is invoked through an * intermediate shell process... cleanup_script is only able * to knock out the shell process, not the actual script */ apr_pool_cleanup_register(r->pool, info, cleanup_script, apr_pool_cleanup_null); /* We are putting the socket discriptor into an apr_file_t so that we can * use a pipe bucket to send the data to the client. APR will create * a cleanup for the apr_file_t which will close the socket, so we'll * get rid of the cleanup we registered when we created the socket. */ apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool); apr_pool_cleanup_kill(r->pool, (void *)sd, close_unix_socket); bcgi = apr_brigade_create(r->pool, r->connection->bucket_alloc); b = apr_bucket_pipe_create(tempsock, r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bcgi, b); ap_pass_brigade(f->next, bcgi); return 0; } static int handle_exec(include_ctx_t *ctx, apr_bucket_brigade **bb, request_rec *r, ap_filter_t *f, apr_bucket *head_ptr, apr_bucket **inserted_head) { char *tag = NULL; char *tag_val = NULL; char *file = r->filename; apr_bucket *tmp_buck; char parsed_string[MAX_STRING_LEN]; *inserted_head = NULL; if (ctx->flags & FLAG_PRINTING) { if (ctx->flags & FLAG_NO_EXEC) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "exec used but not allowed in %s", r->filename); CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, *inserted_head); } else { while (1) { cgid_pfn_gtv(ctx, &tag, &tag_val, 1); if (tag_val == NULL) { if (tag == NULL) { return (0); } else { return 1; } } if (!strcmp(tag, "cmd")) { cgid_pfn_ps(r, ctx, tag_val, parsed_string, sizeof(parsed_string), 1); if (include_cmd(ctx, bb, parsed_string, r, f) == -1) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "execution failure for parameter \"%s\" " "to tag exec in file %s", tag, r->filename); CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, *inserted_head); } /* just in case some stooge changed directories */ } else if (!strcmp(tag, "cgi")) { apr_status_t retval = APR_SUCCESS; cgid_pfn_ps(r, ctx, tag_val, parsed_string, sizeof(parsed_string), 0); SPLIT_AND_PASS_PRETAG_BUCKETS(*bb, ctx, f->next, retval); if (retval != APR_SUCCESS) { return retval; } if (include_cgi(parsed_string, r, f->next, head_ptr, inserted_head) == -1) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "invalid CGI ref \"%s\" in %s", tag_val, file); CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, *inserted_head); } } else { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "unknown parameter \"%s\" to tag exec in %s", tag, file); CREATE_ERROR_BUCKET(ctx, tmp_buck, head_ptr, *inserted_head); } } } } return 0; } /*============================================================================ *============================================================================ * 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_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 */ };