| /* ==================================================================== |
| * 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 */ |
| }; |
