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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. 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. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" 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 names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /*
- * 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 "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 "http_conf_globals.h"
-
- module MODULE_VAR_EXPORT cgi_module;
-
- /* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
- * in ScriptAliased directories, which means we need to know if this
- * request came through ScriptAlias or not... so the Alias module
- * leaves a note for us.
- */
-
- static int is_scriptaliased(request_rec *r)
- {
- const char *t = ap_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 {
- char *logname;
- long logbytes;
- int bufbytes;
- } cgi_server_conf;
-
- static void *create_cgi_config(pool *p, server_rec *s)
- {
- cgi_server_conf *c =
- (cgi_server_conf *) ap_pcalloc(p, sizeof(cgi_server_conf));
-
- c->logname = NULL;
- c->logbytes = DEFAULT_LOGBYTES;
- c->bufbytes = DEFAULT_BUFBYTES;
-
- return c;
- }
-
- static void *merge_cgi_config(pool *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, char *arg)
- {
- server_rec *s = cmd->server;
- cgi_server_conf *conf =
- (cgi_server_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, char *arg)
- {
- server_rec *s = cmd->server;
- cgi_server_conf *conf =
- (cgi_server_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, char *arg)
- {
- server_rec *s = cmd->server;
- cgi_server_conf *conf =
- (cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
-
- conf->bufbytes = atoi(arg);
- return NULL;
- }
-
- static const command_rec cgi_cmds[] =
- {
- {"ScriptLog", set_scriptlog, NULL, RSRC_CONF, TAKE1,
- "the name of a log for script debugging info"},
- {"ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF, TAKE1,
- "the maximum length (in bytes) of the script debug log"},
- {"ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF, TAKE1,
- "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,
- int show_errno, char *error)
- {
- FILE *f;
- struct stat finfo;
-
- ap_log_rerror(APLOG_MARK, show_errno|APLOG_ERR, 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)) ||
- ((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
- "a")) == NULL)) {
- return ret;
- }
-
- /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
- fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
- r->args ? "?" : "", r->args ? r->args : "", r->protocol);
- /* "%% 500 /usr/local/apache/cgi-bin */
- fprintf(f, "%%%% %d %s\n", ret, r->filename);
-
- fprintf(f, "%%error\n%s\n", error);
-
- ap_pfclose(r->pool, f);
- return ret;
- }
-
- static int log_script(request_rec *r, cgi_server_conf * conf, int ret,
- char *dbuf, const char *sbuf, BUFF *script_in, BUFF *script_err)
- {
- array_header *hdrs_arr = ap_table_elts(r->headers_in);
- table_entry *hdrs = (table_entry *) hdrs_arr->elts;
- char argsbuffer[HUGE_STRING_LEN];
- FILE *f;
- int i;
- struct stat finfo;
-
- if (!conf->logname ||
- ((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
- && (finfo.st_size > conf->logbytes)) ||
- ((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
- "a")) == NULL)) {
- /* Soak up script output */
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
- continue;
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
- continue;
- return ret;
- }
-
- /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
- fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
- r->args ? "?" : "", r->args ? r->args : "", r->protocol);
- /* "%% 500 /usr/local/apache/cgi-bin" */
- fprintf(f, "%%%% %d %s\n", ret, r->filename);
-
- fputs("%request\n", f);
- for (i = 0; i < hdrs_arr->nelts; ++i) {
- if (!hdrs[i].key)
- continue;
- fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
- }
- if ((r->method_number == M_POST || r->method_number == M_PUT)
- && *dbuf) {
- fprintf(f, "\n%s\n", dbuf);
- }
-
- fputs("%response\n", f);
- hdrs_arr = ap_table_elts(r->err_headers_out);
- hdrs = (table_entry *) hdrs_arr->elts;
-
- for (i = 0; i < hdrs_arr->nelts; ++i) {
- if (!hdrs[i].key)
- continue;
- fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
- }
-
- if (sbuf && *sbuf)
- fprintf(f, "%s\n", sbuf);
-
- if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
- fputs("%stdout\n", f);
- fputs(argsbuffer, f);
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
- fputs(argsbuffer, f);
- fputs("\n", f);
- }
-
- if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
- fputs("%stderr\n", f);
- fputs(argsbuffer, f);
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
- fputs(argsbuffer, f);
- fputs("\n", f);
- }
-
- ap_bclose(script_in);
- ap_bclose(script_err);
-
- ap_pfclose(r->pool, f);
- return ret;
- }
-
- /****************************************************************
- *
- * Actual CGI handling...
- */
-
-
- struct cgi_child_stuff {
- request_rec *r;
- int nph;
- int debug;
- char *argv0;
- };
-
- static int cgi_child(void *child_stuff, child_info *pinfo)
- {
- struct cgi_child_stuff *cld = (struct cgi_child_stuff *) child_stuff;
- request_rec *r = cld->r;
- char *argv0 = cld->argv0;
- int child_pid;
-
- #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
-
- char **env;
-
- 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
-
- ap_add_cgi_vars(r);
- env = ap_create_environment(r->pool, r->subprocess_env);
-
- #ifdef DEBUG_CGI
- fprintf(dbg, "Environment: \n");
- for (i = 0; env[i]; ++i)
- fprintf(dbg, "'%s'\n", env[i]);
- #endif
-
- #ifndef WIN32
- ap_chdir_file(r->filename);
- #endif
- if (!cld->debug)
- ap_error_log2stderr(r->server);
-
- /* Transumute outselves into the script.
- * NB only ISINDEX scripts get decoded arguments.
- */
-
- ap_cleanup_for_exec();
-
- child_pid = ap_call_exec(r, pinfo, argv0, env, 0);
- #ifdef WIN32
- return (child_pid);
- #else
-
- /* Uh oh. Still here. Where's the kaboom? There was supposed to be an
- * EARTH-shattering kaboom!
- *
- * Oh, well. Muddle through as best we can...
- *
- * Note that only stderr is available at this point, so don't pass in
- * a server to aplog_error.
- */
-
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed", r->filename);
- exit(0);
- /* NOT REACHED */
- return (0);
- #endif
- }
-
- static int cgi_handler(request_rec *r)
- {
- int retval, nph, dbpos = 0;
- char *argv0, *dbuf = NULL;
- BUFF *script_out, *script_in, *script_err;
- char argsbuffer[HUGE_STRING_LEN];
- int is_included = !strcmp(r->protocol, "INCLUDED");
- void *sconf = r->server->module_config;
- cgi_server_conf *conf =
- (cgi_server_conf *) ap_get_module_config(sconf, &cgi_module);
-
- struct cgi_child_stuff cld;
-
- 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));
-
- if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r))
- return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
- "Options ExecCGI is off in this directory");
- if (nph && is_included)
- return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
- "attempt to include NPH CGI script");
-
- #if defined(OS2) || defined(WIN32)
- /* Allow for cgi files without the .EXE extension on them under OS/2 */
- if (r->finfo.st_mode == 0) {
- struct stat statbuf;
- char *newfile;
-
- newfile = ap_pstrcat(r->pool, r->filename, ".EXE", NULL);
-
- if ((stat(newfile, &statbuf) != 0) || (!S_ISREG(statbuf.st_mode))) {
- return log_scripterror(r, conf, NOT_FOUND, 0,
- "script not found or unable to stat");
- } else {
- r->filename = newfile;
- }
- }
- #else
- if (r->finfo.st_mode == 0)
- return log_scripterror(r, conf, NOT_FOUND, APLOG_NOERRNO,
- "script not found or unable to stat");
- #endif
- if (S_ISDIR(r->finfo.st_mode))
- return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
- "attempt to invoke directory as script");
- if (!ap_suexec_enabled) {
- if (!ap_can_exec(&r->finfo))
- return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
- "file permissions deny server execution");
- }
-
- if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
- return retval;
-
- ap_add_common_vars(r);
- cld.argv0 = argv0;
- cld.r = r;
- cld.nph = nph;
- cld.debug = conf->logname ? 1 : 0;
-
- #ifdef CHARSET_EBCDIC
- /* XXX:@@@ Is the generated/included output ALWAYS in text/ebcdic format? */
- /* Or must we check the Content-Type first? */
- ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, 1);
- #endif /*CHARSET_EBCDIC*/
-
- /*
- * we spawn out of r->main if it's there so that we can avoid
- * waiting for free_proc_chain to cleanup in the middle of an
- * SSI request -djg
- */
- if (!ap_bspawn_child(r->main ? r->main->pool : r->pool, cgi_child,
- (void *) &cld, kill_after_timeout,
- &script_out, &script_in, &script_err)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "couldn't spawn child process: %s", r->filename);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- /* Transfer any put/post args, CERN style...
- * Note that if a buggy script fails to read everything we throw
- * at it, or a buggy client sends too much, we get a SIGPIPE, so
- * we have to ignore SIGPIPE while doing this. CERN does the same
- * (and in fact, they pretty nearly guarantee themselves a SIGPIPE
- * on every invocation by chasing the real client data with a
- * spurious newline).
- */
-
- if (ap_should_client_block(r)) {
- void (*handler) (int);
- int dbsize, len_read;
-
- if (conf->logname) {
- dbuf = ap_pcalloc(r->pool, conf->bufbytes + 1);
- dbpos = 0;
- }
-
- ap_hard_timeout("copy script args", r);
- #ifdef SIGPIPE
- handler = signal(SIGPIPE, SIG_IGN);
- #endif
-
- 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;
- }
- ap_reset_timeout(r);
- if (ap_bwrite(script_out, argsbuffer, len_read) < len_read) {
- /* silly script stopped reading, soak up remaining message */
- while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN) > 0) {
- /* dump it */
- }
- break;
- }
- }
-
- ap_bflush(script_out);
- signal(SIGPIPE, handler);
-
- ap_kill_timeout(r);
- }
-
- ap_bclose(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_buff(r, script_in, sbuf))) {
- return log_script(r, conf, ret, dbuf, sbuf, script_in, script_err);
- }
-
- #ifdef CHARSET_EBCDIC
- /* Now check the Content-Type to decide if conversion is needed */
- ap_checkconv(r);
- #endif /*CHARSET_EBCDIC*/
-
- location = ap_table_get(r->headers_out, "Location");
-
- if (location && location[0] == '/' && r->status == 200) {
-
- /* Soak up all the script output */
- ap_hard_timeout("read from script", r);
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
- continue;
- }
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
- continue;
- }
- ap_kill_timeout(r);
-
-
- /* This redirect needs to be a GET no matter what the original
- * method was.
- */
- r->method = ap_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.
- */
- ap_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 REDIRECT;
- }
-
- ap_send_http_header(r);
- if (!r->header_only) {
- ap_send_fb(script_in, r);
- }
- ap_bclose(script_in);
-
- ap_soft_timeout("soaking script stderr", r);
- while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
- continue;
- }
- ap_kill_timeout(r);
- ap_bclose(script_err);
- }
-
- if (script_in && nph) {
- ap_send_fb(script_in, r);
- }
-
- return OK; /* NOT r->status, even if it has changed. */
- }
-
- static const handler_rec cgi_handlers[] =
- {
- {CGI_MAGIC_TYPE, cgi_handler},
- {"cgi-script", cgi_handler},
- {NULL}
- };
-
- module MODULE_VAR_EXPORT cgi_module =
- {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- 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 table */
- cgi_handlers, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- NULL, /* fixups */
- NULL, /* logger */
- NULL, /* header parser */
- NULL, /* child_init */
- NULL, /* child_exit */
- NULL /* post read-request */
- };
-