diff options
author | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
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committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c | |
parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c')
-rw-r--r-- | rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c | 1744 |
1 files changed, 0 insertions, 1744 deletions
diff --git a/rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c b/rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c deleted file mode 100644 index 55ac3b04..00000000 --- a/rubbos/app/httpd-2.0.64/modules/generators/mod_cgid.c +++ /dev/null @@ -1,1744 +0,0 @@ -/* 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 - * - * 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 <sys/socket.h> -#endif -#if APR_HAVE_UNISTD_H -#include <unistd.h> -#endif -#if APR_HAVE_SYS_TYPES_H -#include <sys/types.h> -#endif - -#define CORE_PRIVATE - -#include "util_filter.h" -#include "httpd.h" -#include "http_config.h" -#include "http_request.h" -#include "http_core.h" -#include "http_protocol.h" -#include "http_main.h" -#include "http_log.h" -#include "util_script.h" -#include "ap_mpm.h" -#include "unixd.h" -#include "mod_suexec.h" -#include "../filters/mod_include.h" - -#include "mod_core.h" - - -/* ### should be tossed in favor of APR */ -#include <sys/stat.h> -#include <sys/un.h> /* for sockaddr_un */ - - -module AP_MODULE_DECLARE_DATA cgid_module; - -static int cgid_start(apr_pool_t *p, server_rec *main_server, apr_proc_t *procnew); -static int cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *main_server); -static int handle_exec(include_ctx_t *ctx, 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; -static ap_unix_identity_t empty_ugid = { (uid_t)-1, (gid_t)-1, -1 }; - -/* 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 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 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 */ -} 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 **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->loglevel = 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 **) apr_pcalloc(r->pool, sizeof(void *) * (total_modules + DYNAMIC_MODULE_LIMIT)); - - temp_core = (core_request_config *)apr_palloc(r->pool, sizeof(core_module)); - rconf[req->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; - -#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; - cgid_req_t req = {0}; - apr_status_t stat; - ap_unix_identity_t * ugid = ap_run_get_suexec_identity(r); - - if (ugid == NULL) { - req.ugid = empty_ugid; - } else { - memcpy(&req.ugid, ugid, sizeof(ap_unix_identity_t)); - } - - req.req_type = req_type; - req.conn_id = r->connection->id; - req.core_module_index = core_module.module_index; - 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->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; - } - } - -#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", -#ifdef AP_UNSAFE_ERROR_LOG_UNESCAPED - description -#else - ap_escape_logitem(pool, description) -#endif - ); -} - -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 */ - } - - /* 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, - "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); - - if (memcmp(&empty_ugid, &cgid_req.ugid, sizeof(empty_ugid))) { - /* We have a valid identity, and can be sure that - * cgid_suexec_id_doer will return a valid ugid - */ - rc = ap_os_create_privileged_process(r, procnew, argv0, argv, - (const char * const *)env, - procattr, ptrans); - } else { - rc = apr_proc_create(procnew, argv0, argv, - (const char * const *)env, - procattr, ptrans); - } - - if (rc != APR_SUCCESS) { - /* Bad things happened. Everyone should have cleaned up. - * ap_log_rerror() won't work because the header table used by - * ap_log_rerror() hasn't been replicated in the phony r - */ - ap_log_error(APLOG_MARK, APLOG_ERR, rc, r->server, - "couldn't create child process: %d: %s", rc, - apr_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; - - conf = ap_get_module_config(r->server->module_config, &cgid_module); - is_included = !strcmp(r->protocol, "INCLUDED"); - - if ((argv0 = strrchr(r->filename, '/')) != NULL) - argv0++; - else - argv0 = r->filename; - - nph = !(strncmp(argv0, "nph-", 4)); - - argv0 = r->filename; - - if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r)) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "Options ExecCGI is off in this directory"); - if (nph && is_included) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "attempt to include NPH CGI script"); - -#if defined(OS2) || defined(WIN32) -#error mod_cgid does not work on this platform. If you teach it to, look -#error at mod_cgi.c for required code in this path. -#else - if (r->finfo.filetype == 0) - return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, - "script not found or unable to stat"); -#endif - if (r->finfo.filetype == APR_DIR) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "attempt to invoke directory as script"); - - if ((r->used_path_info == AP_REQ_REJECT_PATH_INFO) && - r->path_info && *r->path_info) - { - /* default to accept */ - return log_scripterror(r, conf, HTTP_NOT_FOUND, 0, - "AcceptPathInfo off disallows user's path"); - } -/* - if (!ap_suexec_enabled) { - if (!ap_can_exec(&r->finfo)) - return log_scripterror(r, conf, HTTP_FORBIDDEN, 0, - "file permissions deny server execution"); - } -*/ - ap_add_common_vars(r); - ap_add_cgi_vars(r); - env = ap_create_environment(r->pool, r->subprocess_env); - - if ((retval = connect_to_daemon(&sd, r, conf)) != OK) { - return retval; - } - - rv = send_req(sd, r, argv0, env, CGI_REQ); - if (rv != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "write to cgi daemon process"); - } - - info = apr_palloc(r->pool, sizeof(struct cleanup_script_info)); - info->r = r; - info->conn_id = r->connection->id; - info->conf = conf; - apr_pool_cleanup_register(r->pool, info, - cleanup_script, - apr_pool_cleanup_null); - /* We are putting the socket discriptor into an apr_file_t so that we can - * use a pipe bucket to send the data to the client. APR will create - * a cleanup for the apr_file_t which will close the socket, so we'll - * get rid of the cleanup we registered when we created the socket. - */ - - apr_os_pipe_put_ex(&tempsock, &sd, 1, r->pool); - apr_pool_cleanup_kill(r->pool, (void *)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) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "Error reading request entity data"); - return HTTP_INTERNAL_SERVER_ERROR; - } - - 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("<A HREF=\"", - sizeof("<A HREF=\"") - 1, - c->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("</A>", sizeof("</A>") - 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 */ -}; - |