diff options
Diffstat (limited to 'modules/generators/mod_cgid.c')
| -rw-r--r-- | modules/generators/mod_cgid.c | 1300 |
1 files changed, 0 insertions, 1300 deletions
diff --git a/modules/generators/mod_cgid.c b/modules/generators/mod_cgid.c deleted file mode 100644 index cbb09d3525..0000000000 --- a/modules/generators/mod_cgid.c +++ /dev/null @@ -1,1300 +0,0 @@ -/* ==================================================================== - * The Apache Software License, Version 1.1 - * - * Copyright (c) 2000-2001 The Apache Software Foundation. All rights - * reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. The end-user documentation included with the redistribution, - * if any, must include the following acknowledgment: - * "This product includes software developed by the - * Apache Software Foundation (http://www.apache.org/)." - * Alternately, this acknowledgment may appear in the software itself, - * if and wherever such third-party acknowledgments normally appear. - * - * 4. The names "Apache" and "Apache Software Foundation" must - * not be used to endorse or promote products derived from this - * software without prior written permission. For written - * permission, please contact apache@apache.org. - * - * 5. Products derived from this software may not be called "Apache", - * nor may "Apache" appear in their name, without prior written - * permission of the Apache Software Foundation. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * ==================================================================== - * - * This software consists of voluntary contributions made by many - * individuals on behalf of the Apache Software Foundation. For more - * information on the Apache Software Foundation, please see - * <http://www.apache.org/>. - * - * Portions of this software are based upon public domain software - * originally written at the National Center for Supercomputing Applications, - * University of Illinois, Urbana-Champaign. - */ - -/* - * http_script: keeps all script-related ramblings together. - * - * Compliant to cgi/1.1 spec - * - * Adapted by rst from original NCSA code by Rob McCool - * - * Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for - * custom error responses, and DOCUMENT_ROOT because we found it useful. - * It also adds SERVER_ADMIN - useful for scripts to know who to mail when - * they fail. - */ - -#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 void 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; -static int total_modules = 0; - -/* KLUDGE --- for back-combatibility, we don't have to check Execcgid - * in ScriptAliased directories, which means we need to know if this - * request came through ScriptAlias or not... so the Alias module - * leaves a note for us. - */ - -static int is_scriptaliased(request_rec *r) -{ - const char *t = 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 "logs/cgisock" - -#define SHELL_PATH "/bin/sh" - -#define CGI_REQ 1 -#define SSI_REQ 2 - -/* 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 - -typedef struct { - const char *sockname; - const char *logname; - long logbytes; - int bufbytes; -} cgid_server_conf; - -/* If a request includes query info in the URL (stuff after "?"), and - * the query info does not contain "=" (indicative of a FORM submission), - * then this routine is called to create the argument list to be passed - * to the CGI script. When suexec is enabled, the suexec path, user, and - * group are the first three arguments to be passed; if not, all three - * must be NULL. The query info is split into separate arguments, where - * "+" is the separator between keyword arguments. - * - * XXXX: note that the WIN32 code uses one of the suexec strings - * to pass an interpreter name. Remember this if changing the way they - * are handled in create_argv. - * - */ -static char **create_argv(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; - - /* 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) -{ - pid_t *sd = data; - switch (reason) { - case APR_OC_REASON_DEATH: - case APR_OC_REASON_LOST: - /* stop gap to make sure everything else works. In the end, - * we'll just restart the cgid server. */ - apr_pool_destroy(pcgi); - kill(getpid(), SIGWINCH); /* yes, to ourself */ - break; - case APR_OC_REASON_RESTART: - apr_proc_other_child_unregister(data); - break; - case APR_OC_REASON_UNREGISTER: - apr_pool_destroy(pcgi); - kill(*sd, SIGHUP); - break; - } -} -#endif - -static void get_req(int fd, request_rec *r, char **argv0, char ***env, int *req_type) -{ - int i, len, j; - unsigned char *data; - char **environ; - core_dir_config *temp_core; - void **dconf; - module *suexec_mod = ap_find_linked_module("mod_suexec.c"); - - r->server = apr_pcalloc(r->pool, sizeof(server_rec)); - - read(fd, req_type, sizeof(int)); - read(fd, &j, sizeof(int)); - read(fd, &len, sizeof(int)); - data = apr_pcalloc(r->pool, len + 1); /* get a cleared byte for final '\0' */ - i = read(fd, data, len); - - r->filename = ap_getword(r->pool, (const char **)&data, '\n'); - *argv0 = ap_getword(r->pool, (const char **)&data, '\n'); - - r->uri = ap_getword(r->pool, (const char **)&data, '\n'); - - environ = apr_pcalloc(r->pool, (j + 2) *sizeof(char *)); - i = 0; - for (i = 0; i < j; i++) { - environ[i] = ap_getword(r->pool, (const char **)&data, '\n'); - } - *env = environ; - r->args = ap_getword(r->pool, (const char **)&data, '\n'); - - read(fd, &i, sizeof(int)); - - /* add 1, so that if i == 0, we still malloc something. */ - - 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[i] = (void *)temp_core; - - if (suexec_mod) { - suexec_config_t *suexec_cfg = apr_pcalloc(r->pool, sizeof(*suexec_cfg)); - - read(fd, &i, sizeof(int)); - read(fd, &suexec_cfg->ugid.uid, sizeof(uid_t)); - read(fd, &suexec_cfg->ugid.gid, sizeof(gid_t)); - read(fd, &suexec_cfg->active, sizeof(int)); - dconf[i] = (void *)suexec_cfg; - } - - r->per_dir_config = (ap_conf_vector_t *)dconf; -#if 0 -#ifdef RLIMIT_CPU - read(fd, &j, sizeof(int)); - if (j) { - temp_core->limit_cpu = (struct rlimit *)apr_palloc (sizeof(struct rlimit)); - read(fd, temp_core->limit_cpu, sizeof(struct rlimit)); - } - else { - temp_core->limit_cpu = NULL; - } -#endif - -#if defined (RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS) - read(fd, &j, sizeof(int)); - if (j) { - temp_core->limit_mem = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit)); - read(fd, temp_core->limit_mem, sizeof(struct rlimit)); - } - else { - temp_core->limit_mem = NULL; - } -#endif - -#ifdef RLIMIT_NPROC - read(fd, &j, sizeof(int)); - if (j) { - temp_core->limit_nproc = (struct rlimit *)apr_palloc(r->pool, sizeof(struct rlimit)); - read(fd, temp_core->limit_nproc, sizeof(struct rlimit)); - } - else { - temp_core->limit_nproc = NULL; - } -#endif -#endif - /* For right now, just make the notes table. At some point we will need - * to actually fill this out, but for now we just don't want suexec to - * seg fault. - */ - r->notes = apr_table_make(r->pool, 1); -} - - - -static void send_req(int fd, request_rec *r, char *argv0, char **env, int req_type) -{ - int len, r_type = req_type; - int i = 0; - char *data; - module *suexec_mod = ap_find_linked_module("mod_suexec.c"); - - data = apr_pstrcat(r->pool, r->filename, "\n", argv0, "\n", r->uri, "\n", - NULL); - - for (i =0; env[i]; i++) { - continue; - } - - /* Write the request type (SSI "exec cmd" or cgi). */ - if (write(fd, &r_type, sizeof(int)) < 0) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "write to cgi daemon process"); - } - - /* Write the number of entries in the environment. */ - if (write(fd, &i, sizeof(int)) < 0) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "write to cgi daemon process"); - } - - for (i = 0; env[i]; i++) { - data = apr_pstrcat(r->pool, data, env[i], "\n", NULL); - } - data = apr_pstrcat(r->pool, data, r->args, NULL); - len = strlen(data); - /* Write the length of the concatenated env string. */ - if (write(fd, &len, sizeof(int)) < 0) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "write to cgi daemon process"); - } - /* Write the concatted env string. */ - if (write(fd, data, len) < 0) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "write to cgi daemon process"); - } - /* Write module_index id value. */ - if (write(fd, &core_module.module_index, sizeof(int)) < 0) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "write to cgi daemon process"); - } - if (suexec_mod) { - suexec_config_t *suexec_cfg = ap_get_module_config(r->per_dir_config, - suexec_mod); - - write(fd, &suexec_mod->module_index, sizeof(int)); - write(fd, &suexec_cfg->ugid.uid, sizeof(uid_t)); - write(fd, &suexec_cfg->ugid.gid, sizeof(gid_t)); - write(fd, &suexec_cfg->active, sizeof(int)); - } - -#if 0 -#ifdef RLIMIT_CPU - if (conf->limit_cpu) { - len = 1; - write(fd, &len, sizeof(int)); - write(fd, conf->limit_cpu, sizeof(struct rlimit)); - } - else { - len = 0; - write(fd, &len, sizeof(int)); - } -#endif - -#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS) - if (conf->limit_mem) { - len = 1; - write(fd, &len, sizeof(int)); - write(fd, conf->limit_mem, sizeof(struct rlimit)); - } - else { - len = 0; - write(fd, &len, sizeof(int)); - } -#endif - -#ifdef RLIMIT_NPROC - if (conf->limit_nproc) { - len = 1; - write(fd, &len, sizeof(int)); - write(fd, conf->limit_nproc, sizeof(struct rlimit)); - } - else { - len = 0; - write(fd, &len, sizeof(int)); - } -#endif -#endif -} - -static int cgid_server(void *data) -{ - struct sockaddr_un unix_addr; - int sd, sd2, rc, req_type; - 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_pool_create(&ptrans, pcgi); - - apr_signal(SIGCHLD, SIG_IGN); - 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 (1) { - int errfileno = STDERR_FILENO; - char *argv0; - char **env; - const char * const *argv; - apr_int32_t in_pipe = APR_CHILD_BLOCK; - apr_int32_t out_pipe = APR_CHILD_BLOCK; - apr_int32_t err_pipe = APR_CHILD_BLOCK; - apr_cmdtype_e cmd_type = APR_PROGRAM; - request_rec *r; - apr_procattr_t *procattr = NULL; - apr_proc_t *procnew = NULL; - apr_file_t *inout; - - 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; - get_req(sd2, r, &argv0, &env, &req_type); - apr_os_file_put(&r->server->error_log, &errfileno, r->pool); - apr_os_file_put(&inout, &sd2, r->pool); - - if (req_type == SSI_REQ) { - in_pipe = APR_NO_PIPE; - out_pipe = APR_FULL_BLOCK; - err_pipe = APR_NO_PIPE; - cmd_type = APR_SHELLCMD; - } - - if (((rc = apr_procattr_create(&procattr, ptrans)) != APR_SUCCESS) || - ((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)) { - /* Something bad happened, tell the world. */ - ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, - "couldn't set child process attributes: %s", r->filename); - } - else { - argv = (const char * const *)create_argv(r->pool, NULL, NULL, NULL, argv0, r->args); - - /* We want to sd2 close for new CGI process too. - * If it's remained 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(APLOG_MARK, APLOG_ERR, rc, r, - "couldn't create child process: %d: %s", rc, r->filename); - } - } - } - return -1; -} - -static void cgid_init(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, - server_rec *main_server) -{ - pid_t pid; - apr_proc_t *procnew; - void *data; - int first_time = 0; - const char *userdata_key = "cgid_init"; - module **m; - - apr_pool_userdata_get(&data, userdata_key, main_server->process->pool); - if (!data) { - first_time = 1; - apr_pool_userdata_set((const void *)1, userdata_key, - apr_pool_cleanup_null, main_server->process->pool); - } - - if (!first_time) { - apr_pool_create(&pcgi, p); - - total_modules = 0; - for (m = ap_preloaded_modules; *m != NULL; m++) - total_modules++; - - - if ((pid = fork()) < 0) { - ap_log_error(APLOG_MARK, APLOG_ERR, errno, main_server, - "Couldn't spawn cgid daemon process"); - } - else if (pid == 0) { - cgid_server(main_server); - exit(-1); - } - procnew = apr_pcalloc(p, sizeof(*procnew)); - procnew->pid = pid; - procnew->err = procnew->in = procnew->out = NULL; - apr_pool_note_subprocess(p, procnew, kill_after_timeout); -#if APR_HAS_OTHER_CHILD - apr_proc_other_child_register(procnew, cgid_maint, &procnew->pid, NULL, p); -#endif - - 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); - } - } -} - -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 = arg; - 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); - 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_NOERRNO | APLOG_ERR; - - ap_log_rerror(APLOG_MARK, log_flags, rv, r, - "%s: %s", error, r->filename); - - if (!conf->logname || - ((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0) - && (finfo.st_size > conf->logbytes)) || - (apr_file_open(&f, ap_server_root_relative(r->pool, 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_file_t *script_in, apr_file_t *script_err) -{ - apr_array_header_t *hdrs_arr = apr_table_elts(r->headers_in); - apr_table_entry_t *hdrs = (apr_table_entry_t *) hdrs_arr->elts; - char argsbuffer[HUGE_STRING_LEN]; - apr_file_t *f = NULL; - int i; - struct stat finfo; - char time_str[APR_CTIME_LEN]; - - if (!conf->logname || - ((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0) - && (finfo.st_size > conf->logbytes)) || - (apr_file_open(&f, ap_server_root_relative(r->pool, conf->logname), - APR_APPEND|APR_WRITE|APR_CREATE, APR_OS_DEFAULT, r->pool) != APR_SUCCESS)) { - /* Soak up script output */ - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_in) == 0) - continue; - if (script_err) { - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_err) == 0) - 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 = (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); - - if (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_in) == 0) { - apr_file_puts("%stdout\n", f); - apr_file_puts(argsbuffer, f); - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_in) == 0) - apr_file_puts(argsbuffer, f); - apr_file_puts("\n", f); - } - - if (script_err) { - if (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_err) == 0) { - apr_file_puts("%stderr\n", f); - apr_file_puts(argsbuffer, f); - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_err) == 0) - apr_file_puts(argsbuffer, f); - apr_file_puts("\n", f); - } - } - - apr_file_close(script_in); - if (script_err) { - apr_file_close(script_err); - } - - apr_file_close(f); - return ret; -} - - - -/**************************************************************** - * - * Actual cgid handling... - */ -static int cgid_handler(request_rec *r) -{ - int retval, nph, dbpos = 0; - char *argv0, *dbuf = NULL; - apr_bucket_brigade *bb; - apr_bucket *b; - char argsbuffer[HUGE_STRING_LEN]; - cgid_server_conf *conf; - int is_included; - int sd; - char **env; - struct sockaddr_un unix_addr; - apr_file_t *tempsock; - apr_size_t nbytes; - - 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 |= (1 << M_GET); - r->allowed |= (1 << 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 (!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 ((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"); - } - memset(&unix_addr, 0, sizeof(unix_addr)); - unix_addr.sun_family = AF_UNIX; - strcpy(unix_addr.sun_path, conf->sockname); - - if (connect(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) { - return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno, - "unable to connect to cgi daemon"); - } - - send_req(sd, r, argv0, env, CGI_REQ); - - /* We are putting the tempsock variable into a file so that we can use - * a pipe bucket to send the data to the client. - */ - apr_os_file_put(&tempsock, &sd, r->pool); - - if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR))) - return retval; - - if ((argv0 = strrchr(r->filename, '/')) != NULL) - argv0++; - else - argv0 = r->filename; - - /* Transfer any put/post args, CERN style... - * Note that we already ignore SIGPIPE in the core server. - */ - - if (ap_should_client_block(r)) { - int dbsize, len_read; - - if (conf->logname) { - dbuf = apr_pcalloc(r->pool, conf->bufbytes + 1); - dbpos = 0; - } - - while ((len_read = - ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN)) > 0) { - if (conf->logname) { - if ((dbpos + len_read) > conf->bufbytes) { - dbsize = conf->bufbytes - dbpos; - } - else { - dbsize = len_read; - } - memcpy(dbuf + dbpos, argsbuffer, dbsize); - dbpos += dbsize; - } - nbytes = len_read; - apr_file_write(tempsock, argsbuffer, &nbytes); - if (nbytes < len_read) { - /* silly script stopped reading, soak up remaining message */ - while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN) > 0) { - /* dump it */ - } - break; - } - } - } - /* 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; - - if ((ret = ap_scan_script_header_err(r, tempsock, sbuf))) { - return log_script(r, conf, ret, dbuf, sbuf, tempsock, NULL); - } - - location = apr_table_get(r->headers_out, "Location"); - - if (location && location[0] == '/' && r->status == 200) { - - /* Soak up all the script output */ - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, tempsock) > 0) { - continue; - } - /* 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" - */ - return HTTP_MOVED_TEMPORARILY; - } - - if (!r->header_only) { - bb = apr_brigade_create(r->pool); - b = apr_bucket_pipe_create(tempsock); - APR_BRIGADE_INSERT_TAIL(bb, b); - b = apr_bucket_eos_create(); - APR_BRIGADE_INSERT_TAIL(bb, b); - ap_pass_brigade(r->output_filters, bb); - } - } - - if (nph) { - bb = apr_brigade_create(r->pool); - b = apr_bucket_pipe_create(tempsock); - APR_BRIGADE_INSERT_TAIL(bb, b); - b = apr_bucket_eos_create(); - APR_BRIGADE_INSERT_TAIL(bb, b); - ap_pass_brigade(r->output_filters, bb); - } - - apr_file_close(tempsock); - - 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) { - return -1; - } - - /* No hardwired path info or query allowed */ - - if ((rr->path_info && rr->path_info[0]) || rr->args) { - return -1; - } - if (rr->finfo.protection == 0) { - 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. - */ - - rr->content_type = CGI_MAGIC_TYPE; - - /* Run it. */ - - rr_status = ap_run_sub_req(rr); - if (ap_is_HTTP_REDIRECT(rr_status)) { - apr_size_t len_loc, h_wrt; - const char *location = apr_table_get(rr->headers_out, "Location"); - - location = ap_escape_html(rr->pool, location); - len_loc = strlen(location); - - tmp_buck = apr_bucket_immortal_create("<A HREF=\"", sizeof("<A HREF=\"")); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp_buck); - tmp2_buck = apr_bucket_heap_create(location, len_loc, 1, &h_wrt); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_immortal_create("\">", sizeof("\">")); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_heap_create(location, len_loc, 1, &h_wrt); - APR_BUCKET_INSERT_BEFORE(head_ptr, tmp2_buck); - tmp2_buck = apr_bucket_immortal_create("</A>", sizeof("</A>")); - 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, next); - if (pa_req->filename) { - apr_table_setn(e, "PATH_TRANSLATED", - apr_pstrcat(r->pool, pa_req->filename, pa_req->path_info, NULL)); - } - } - - 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; - const char *location; - int sd; - int retval; - apr_bucket_brigade *bcgi; - apr_bucket *b; - struct sockaddr_un unix_addr; - apr_file_t *tempsock = NULL; - cgid_server_conf *conf = ap_get_module_config(r->server->module_config, - &cgid_module); - - add_ssi_vars(r, f->next); - env = ap_create_environment(r->pool, r->subprocess_env); - - if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { - return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, 0, - "unable to create socket to cgi daemon"); - } - - memset(&unix_addr, 0, sizeof(unix_addr)); - unix_addr.sun_family = AF_UNIX; - strcpy(unix_addr.sun_path, conf->sockname); - - if (connect(sd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) { - return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, 0, - "unable to connect to cgi daemon"); - } - - SPLIT_AND_PASS_PRETAG_BUCKETS(*bb, ctx, f->next); - - send_req(sd, r, command, env, SSI_REQ); - - /* We are putting the tempsock variable into a file so that we can use - * a pipe bucket to send the data to the client. - */ - apr_os_file_put(&tempsock, &sd, r->pool); - - if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR))) - return retval; - - location = apr_table_get(r->headers_out, "Location"); - - if (location && location[0] == '/' && r->status == 200) { - char argsbuffer[HUGE_STRING_LEN]; - - /* Soak up all the script output */ - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, tempsock) > 0) { - continue; - } - /* 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" - */ - return HTTP_MOVED_TEMPORARILY; - } - - if (!r->header_only) { - bcgi = apr_brigade_create(r->pool); - b = apr_bucket_pipe_create(tempsock); - 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_NOERRNO|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, tag_val, parsed_string, sizeof(parsed_string), 1); - if (include_cmd(ctx, bb, parsed_string, r, f) == -1) { - ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|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")) { - cgid_pfn_ps(r, tag_val, parsed_string, sizeof(parsed_string), 0); - SPLIT_AND_PASS_PRETAG_BUCKETS(*bb, ctx, f->next); - if (include_cgi(parsed_string, r, f->next, head_ptr, inserted_head) == -1) { - ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|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_NOERRNO|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 */ -}; - |