diff options
Diffstat (limited to 'modules/generators/mod_cgi.c')
| -rw-r--r-- | modules/generators/mod_cgi.c | 1005 |
1 files changed, 0 insertions, 1005 deletions
diff --git a/modules/generators/mod_cgi.c b/modules/generators/mod_cgi.c deleted file mode 100644 index 3431936985..0000000000 --- a/modules/generators/mod_cgi.c +++ /dev/null @@ -1,1005 +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.h" -#include "apr_strings.h" -#include "apr_thread_proc.h" /* for RLIMIT stuff */ -#include "apr_optional.h" -#include "apr_buckets.h" - -#define APR_WANT_STRFUNC -#include "apr_want.h" - -#define CORE_PRIVATE - -#include "util_filter.h" -#include "ap_config.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 "mod_core.h" -#include "../filters/mod_include.h" - - -module AP_MODULE_DECLARE_DATA cgi_module; - -static APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *cgi_pfn_reg_with_ssi; -static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *cgi_pfn_gtv; -static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *cgi_pfn_ps; - -typedef enum {RUN_AS_SSI, RUN_AS_CGI} prog_types; - -typedef struct { - apr_int32_t in_pipe; - apr_int32_t out_pipe; - apr_int32_t err_pipe; - apr_cmdtype_e cmd_type; - prog_types prog_type; - apr_bucket_brigade **bb; - include_ctx_t *ctx; - ap_filter_t *next; -} exec_info; - -/* 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 - -typedef struct { - const char *logname; - long logbytes; - int bufbytes; -} cgi_server_conf; - -static void *create_cgi_config(apr_pool_t *p, server_rec *s) -{ - cgi_server_conf *c = - (cgi_server_conf *) apr_pcalloc(p, sizeof(cgi_server_conf)); - - c->logname = NULL; - c->logbytes = DEFAULT_LOGBYTES; - c->bufbytes = DEFAULT_BUFBYTES; - - return c; -} - -static void *merge_cgi_config(apr_pool_t *p, void *basev, void *overridesv) -{ - cgi_server_conf *base = (cgi_server_conf *) basev, *overrides = (cgi_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; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_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; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_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; - cgi_server_conf *conf = ap_get_module_config(s->module_config, - &cgi_module); - - conf->bufbytes = atoi(arg); - return NULL; -} - -static const command_rec cgi_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"), - {NULL} -}; - -static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret, - apr_status_t rv, char *error) -{ - apr_file_t *f = NULL; - apr_finfo_t 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 || - ((apr_stat(&finfo, ap_server_root_relative(r->pool, conf->logname), - APR_FINFO_SIZE, r->pool) == APR_SUCCESS) - && (finfo.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 /cgi-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/cgi-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; -} - -/* Soak up stderr from a script and redirect it to the error log. - */ -static void log_script_err(request_rec *r, apr_file_t *script_err) -{ - char argsbuffer[HUGE_STRING_LEN]; - char *newline; - - while (apr_file_gets(argsbuffer, HUGE_STRING_LEN, script_err) == 0) { - newline = strchr(argsbuffer, '\n'); - if (newline) { - *newline = '\0'; - } - ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, r, - "%s", argsbuffer); - } -} - -static int log_script(request_rec *r, cgi_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; - apr_finfo_t finfo; - char time_str[APR_CTIME_LEN]; - - if (!conf->logname || - ((apr_stat(&finfo, ap_server_root_relative(r->pool, conf->logname), - APR_FINFO_SIZE, r->pool) == APR_SUCCESS) - && (finfo.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; - - log_script_err(r, script_err); - return ret; - } - - /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-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/cgi-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 (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); - apr_file_close(script_err); - - apr_file_close(f); - return ret; -} - - -/* 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 apr_status_t run_cgi_child(apr_file_t **script_out, - apr_file_t **script_in, - apr_file_t **script_err, - const char *command, - const char * const argv[], - request_rec *r, - apr_pool_t *p, - exec_info *e_info) -{ - const char * const *env; - apr_procattr_t *procattr; - apr_proc_t *procnew; - apr_status_t rc = APR_SUCCESS; - -#if defined(RLIMIT_CPU) || defined(RLIMIT_NPROC) || \ - defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined (RLIMIT_AS) - - core_dir_config *conf = ap_get_module_config(r->per_dir_config, - &core_module); -#endif - - -#ifdef DEBUG_CGI -#ifdef OS2 - /* Under OS/2 need to use device con. */ - FILE *dbg = fopen("con", "w"); -#else - FILE *dbg = fopen("/dev/tty", "w"); -#endif - int i; -#endif - - RAISE_SIGSTOP(CGI_CHILD); -#ifdef DEBUG_CGI - fprintf(dbg, "Attempting to exec %s as %sCGI child (argv0 = %s)\n", - r->filename, cld->nph ? "NPH " : "", argv0); -#endif - - if (e_info->prog_type == RUN_AS_CGI) { - ap_add_cgi_vars(r); - } - else /* SSIs want a controlled environment and a special path. */ - { - add_ssi_vars(r, e_info->next); - } - env = (const char * const *)ap_create_environment(p, r->subprocess_env); - -#ifdef DEBUG_CGI - fprintf(dbg, "Environment: \n"); - for (i = 0; env[i]; ++i) - fprintf(dbg, "'%s'\n", env[i]); -#endif - - /* Transmute ourselves into the script. - * NB only ISINDEX scripts get decoded arguments. - */ - if (((rc = apr_procattr_create(&procattr, p)) != APR_SUCCESS) || - ((rc = apr_procattr_io_set(procattr, - e_info->in_pipe, - e_info->out_pipe, - e_info->err_pipe)) != APR_SUCCESS) || - ((rc = apr_procattr_dir_set(procattr, - ap_make_dirstr_parent(r->pool, r->filename))) != APR_SUCCESS) || -#ifdef RLIMIT_CPU - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_CPU, conf->limit_cpu)) != APR_SUCCESS) || -#endif -#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS) - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_MEM, conf->limit_mem)) != APR_SUCCESS) || -#endif -#ifdef RLIMIT_NPROC - ((rc = apr_procattr_limit_set(procattr, APR_LIMIT_NPROC, conf->limit_nproc)) != APR_SUCCESS) || -#endif - ((rc = apr_procattr_cmdtype_set(procattr, e_info->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 { - procnew = apr_pcalloc(p, sizeof(*procnew)); - if (e_info->prog_type == RUN_AS_SSI) { - SPLIT_AND_PASS_PRETAG_BUCKETS(*(e_info->bb), e_info->ctx, e_info->next); - } - - rc = ap_os_create_privileged_process(r, procnew, command, argv, env, procattr, p); - - 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); - } - else { - apr_pool_note_subprocess(p, procnew, kill_after_timeout); - - *script_in = procnew->out; - if (!script_in) - return APR_EBADF; - apr_file_pipe_timeout_set(*script_in, (int)(r->server->timeout * APR_USEC_PER_SEC)); - - if (e_info->prog_type == RUN_AS_CGI) { - *script_out = procnew->in; - if (!*script_out) - return APR_EBADF; - apr_file_pipe_timeout_set(*script_out, (int)(r->server->timeout * APR_USEC_PER_SEC)); - - *script_err = procnew->err; - if (!*script_err) - return APR_EBADF; - apr_file_pipe_timeout_set(*script_err, (int)(r->server->timeout * APR_USEC_PER_SEC)); - } - } - } - return (rc); -} - -static apr_status_t build_argv_list(const char ***argv, request_rec *r, - apr_pool_t *p) -{ - int numwords, x, idx; - char *w; - const char *args = r->args; - - if (!args || !args[0] || ap_strchr_c(args, '=')) { - numwords = 1; - } - else { - /* count the number of keywords */ - for (x = 0, numwords = 2; args[x]; x++) { - if (args[x] == '+') { - ++numwords; - } - } - } - /* Everything is - 1 to account for the first parameter which is the - * program name. We didn't used to have to do this, but APR wants it. - */ - if (numwords > APACHE_ARG_MAX - 1) { - numwords = APACHE_ARG_MAX - 1; /* Truncate args to prevent overrun */ - } - *argv = apr_palloc(p, (numwords + 2) * sizeof(char *)); - - for (x = 1, idx = 1; x < numwords; x++) { - w = ap_getword_nulls(p, &args, '+'); - ap_unescape_url(w); - (*argv)[idx++] = ap_escape_shell_cmd(p, w); - } - (*argv)[idx] = NULL; - - return APR_SUCCESS; -} - -static apr_status_t build_command_line(const char **cmd, request_rec *r, - apr_pool_t *p) -{ -#ifdef WIN32 - char *quoted_filename = NULL; - char *interpreter = NULL; - char *arguments = NULL; - file_type_e fileType; -#endif - const char *argv0; - - /* Allow suexec's "/" check to succeed */ - if ((argv0 = strrchr(r->filename, '/')) != NULL) - argv0++; - else - argv0 = r->filename; - -#ifdef WIN32 - *cmd = NULL; - fileType = ap_get_win32_interpreter(r, &interpreter, &arguments); - - if (fileType == eFileTypeUNKNOWN) { - ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, r, - "%s is not executable; ensure interpreted scripts have " - "\"#!\" first line", - r->filename); - return APR_EBADF; - } - - /* - * Build the command string to pass to ap_os_create_privileged_process() - */ - quoted_filename = apr_pstrcat(p, "\"", r->filename, "\"", NULL); - if (interpreter && *interpreter) { - if (arguments && *arguments) - *cmd = apr_pstrcat(p, interpreter, " ", quoted_filename, " ", - arguments, NULL); - else - *cmd = apr_pstrcat(p, interpreter, " ", quoted_filename, " ", NULL); - } - else if (arguments && *arguments) { - *cmd = apr_pstrcat(p, quoted_filename, " ", arguments, NULL); - } - else { - *cmd = apr_pstrcat(p, quoted_filename, NULL); - } -#else - *cmd = argv0; -#endif - return APR_SUCCESS; -} - -static int cgi_handler(request_rec *r) -{ - int retval, nph, dbpos = 0; - const char *argv0; - const char *command; - const char **argv; - char *dbuf = NULL; - apr_file_t *script_out = NULL, *script_in = NULL, *script_err = NULL; - apr_bucket_brigade *bb; - apr_bucket *b; - char argsbuffer[HUGE_STRING_LEN]; - int is_included = !strcmp(r->protocol, "INCLUDED"); - apr_pool_t *p; - cgi_server_conf *conf; - apr_status_t rv; - exec_info e_info; - - if(strcmp(r->handler,CGI_MAGIC_TYPE) && strcmp(r->handler,"cgi-script")) - return DECLINED; - - p = r->main ? r->main->pool : r->pool; - - if (r->method_number == M_OPTIONS) { - /* 99 out of 100 CGI scripts, this is all they support */ - r->allowed |= (1 << M_GET); - r->allowed |= (1 << M_POST); - return DECLINED; - } - - if ((argv0 = strrchr(r->filename, '/')) != NULL) - argv0++; - else - argv0 = r->filename; - - nph = !(strncmp(argv0, "nph-", 4)); - conf = ap_get_module_config(r->server->module_config, &cgi_module); - - 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) - /* XXX: This is wrong. As an option, perhaps, but not by default... - * we are back to the same argument that a url should be a unique - * entity until the sysadmin overrides that behavior. - * Allow for cgi files without the .EXE extension on them under OS/2 - */ - if (r->finfo.filetype == 0) { - apr_finfo_t finfo; - char *newfile; - apr_status_t rv; - - newfile = apr_pstrcat(r->pool, r->filename, ".EXE", NULL); - if (((rv = apr_stat(&finfo, newfile, APR_FINFO_TYPE, r->pool)) - != APR_SUCCESS) || (finfo.filetype != APR_REG)) { - return log_scripterror(r, conf, HTTP_NOT_FOUND, rv, - "script not found or unable to stat"); - } else { - r->filename = newfile; - } - } -#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"); - } - -*/ - if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR))) - return retval; - - ap_add_common_vars(r); - - /* build the command line */ - if ((rv = build_command_line(&command, r, p)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "couldn't spawn child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - /* build the argument list */ - else if ((rv = build_argv_list(&argv, r, p)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "couldn't spawn child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - argv[0] = apr_pstrdup(p, command); - - e_info.cmd_type = APR_PROGRAM; - e_info.in_pipe = APR_CHILD_BLOCK; - e_info.out_pipe = APR_CHILD_BLOCK; - e_info.err_pipe = APR_CHILD_BLOCK; - e_info.prog_type = RUN_AS_CGI; - e_info.bb = NULL; - e_info.ctx = NULL; - e_info.next = NULL; - - /* run the script in its own process */ - if ((rv = run_cgi_child(&script_out, &script_in, &script_err, - command, argv, r, p, &e_info)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "couldn't spawn child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* 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; - apr_size_t bytes_written, bytes_to_write; - apr_status_t rv; - - 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; - } - /* Keep writing data to the child until done or too much time - * elapses with no progress or an error occurs. - */ - bytes_written = 0; - do { - bytes_to_write = len_read - bytes_written; - rv = apr_file_write(script_out, argsbuffer + bytes_written, - &bytes_to_write); - bytes_written += bytes_to_write; - } while (rv == APR_SUCCESS && bytes_written < len_read); - if (rv != APR_SUCCESS || bytes_written < len_read) { - /* silly script stopped reading, soak up remaining message */ - while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN) > 0) { - /* dump it */ - } - break; - } - } - apr_file_flush(script_out); - } - - apr_file_close(script_out); - - /* Handle script return... */ - if (script_in && !nph) { - const char *location; - char sbuf[MAX_STRING_LEN]; - int ret; - - if ((ret = ap_scan_script_header_err(r, script_in, sbuf))) { - return log_script(r, conf, ret, dbuf, sbuf, script_in, script_err); - } - - 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, script_in) == 0) { - continue; - } - log_script_err(r, script_err); - /* 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(script_in); - APR_BRIGADE_INSERT_TAIL(bb, b); - b = apr_bucket_eos_create(); - APR_BRIGADE_INSERT_TAIL(bb, b); - ap_pass_brigade(r->output_filters, bb); - } - - log_script_err(r, script_err); - apr_file_close(script_err); - } - - if (script_in && nph) { - bb = apr_brigade_create(r->pool); - b = apr_bucket_pipe_create(script_in); - APR_BRIGADE_INSERT_TAIL(bb, b); - b = apr_bucket_eos_create(); - 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) { - 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; -} - - -static int include_cmd(include_ctx_t *ctx, apr_bucket_brigade **bb, char *command, - request_rec *r, ap_filter_t *f) -{ - exec_info e_info; - const char **argv; - apr_file_t *script_out = NULL, *script_in = NULL, *script_err = NULL; - apr_bucket_brigade *bcgi; - apr_bucket *b; - - if (build_argv_list(&argv, r, r->pool) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "couldn't spawn cmd child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - argv[0] = apr_pstrdup(r->pool, command); - - e_info.cmd_type = APR_SHELLCMD; - e_info.in_pipe = APR_NO_PIPE; - e_info.out_pipe = APR_FULL_BLOCK; - e_info.err_pipe = APR_NO_PIPE; - e_info.prog_type = RUN_AS_SSI; - e_info.bb = bb; - e_info.ctx = ctx; - e_info.next = f->next; - - /* run the script in its own process */ - if (run_cgi_child(&script_out, &script_in, &script_err, - command, argv, r, r->pool, &e_info) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, - "couldn't spawn child process: %s", r->filename); - return HTTP_INTERNAL_SERVER_ERROR; - } - - bcgi = apr_brigade_create(r->pool); - b = apr_bucket_pipe_create(script_in); - APR_BRIGADE_INSERT_TAIL(bcgi, b); - ap_pass_brigade(f->next, bcgi); - - /* We can't close the pipe here, because we may return before the - * full CGI has been sent to the network. That's okay though, - * because we can rely on the pool to close the pipe for us. - */ - - 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) { - cgi_pfn_gtv(ctx, &tag, &tag_val, 1); - if (tag_val == NULL) { - if (tag == NULL) { - return (0); - } - else { - return 1; - } - } - if (!strcmp(tag, "cmd")) { - cgi_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); - } - } - else if (!strcmp(tag, "cgi")) { - cgi_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 cgi_post_config(apr_pool_t *p, apr_pool_t *plog, - apr_pool_t *ptemp, server_rec *s) -{ - cgi_pfn_reg_with_ssi = APR_RETRIEVE_OPTIONAL_FN(ap_register_include_handler); - cgi_pfn_gtv = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_get_tag_and_value); - cgi_pfn_ps = APR_RETRIEVE_OPTIONAL_FN(ap_ssi_parse_string); - - if ((cgi_pfn_reg_with_ssi) && (cgi_pfn_gtv) && (cgi_pfn_ps)) { - /* Required by mod_include filter. This is how mod_cgi registers - * with mod_include to provide processing of the exec directive. - */ - cgi_pfn_reg_with_ssi("exec", handle_exec); - } -} - -static void register_hooks(apr_pool_t *p) -{ - static const char * const aszPre[] = { "mod_include.c", NULL }; - ap_hook_handler(cgi_handler, NULL, NULL, APR_HOOK_MIDDLE); - ap_hook_post_config(cgi_post_config, aszPre, NULL, APR_HOOK_REALLY_FIRST); -} - -module AP_MODULE_DECLARE_DATA cgi_module = -{ - STANDARD20_MODULE_STUFF, - NULL, /* dir config creater */ - NULL, /* dir merger --- default is to override */ - create_cgi_config, /* server config */ - merge_cgi_config, /* merge server config */ - cgi_cmds, /* command apr_table_t */ - register_hooks /* register hooks */ -}; |