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e3e87d34a0
Obtained from: Apache 1.3.9 (minus unused files), tag APACHE_1_3_9 Submitted by: Apache Group git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83751 13f79535-47bb-0310-9956-ffa450edef68
610 lines
18 KiB
C
610 lines
18 KiB
C
/* ====================================================================
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* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* 4. The names "Apache Server" and "Apache Group" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Group and was originally based
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* on public domain software written at the National Center for
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* Supercomputing Applications, University of Illinois, Urbana-Champaign.
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* For more information on the Apache Group and the Apache HTTP server
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* project, please see <http://www.apache.org/>.
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*
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*/
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/*
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* http_script: keeps all script-related ramblings together.
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*
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* Compliant to CGI/1.1 spec
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*
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* Adapted by rst from original NCSA code by Rob McCool
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*
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* Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for
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* custom error responses, and DOCUMENT_ROOT because we found it useful.
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* It also adds SERVER_ADMIN - useful for scripts to know who to mail when
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* they fail.
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*/
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#include "httpd.h"
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#include "http_config.h"
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#include "http_request.h"
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#include "http_core.h"
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#include "http_protocol.h"
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#include "http_main.h"
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#include "http_log.h"
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#include "util_script.h"
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#include "http_conf_globals.h"
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module MODULE_VAR_EXPORT cgi_module;
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/* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
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* in ScriptAliased directories, which means we need to know if this
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* request came through ScriptAlias or not... so the Alias module
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* leaves a note for us.
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*/
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static int is_scriptaliased(request_rec *r)
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{
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const char *t = ap_table_get(r->notes, "alias-forced-type");
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return t && (!strcasecmp(t, "cgi-script"));
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}
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/* Configuration stuff */
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#define DEFAULT_LOGBYTES 10385760
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#define DEFAULT_BUFBYTES 1024
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typedef struct {
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char *logname;
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long logbytes;
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int bufbytes;
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} cgi_server_conf;
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static void *create_cgi_config(pool *p, server_rec *s)
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{
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cgi_server_conf *c =
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(cgi_server_conf *) ap_pcalloc(p, sizeof(cgi_server_conf));
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c->logname = NULL;
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c->logbytes = DEFAULT_LOGBYTES;
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c->bufbytes = DEFAULT_BUFBYTES;
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return c;
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}
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static void *merge_cgi_config(pool *p, void *basev, void *overridesv)
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{
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cgi_server_conf *base = (cgi_server_conf *) basev, *overrides = (cgi_server_conf *) overridesv;
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return overrides->logname ? overrides : base;
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}
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static const char *set_scriptlog(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->logname = arg;
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return NULL;
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}
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static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->logbytes = atol(arg);
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return NULL;
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}
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static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->bufbytes = atoi(arg);
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return NULL;
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}
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static const command_rec cgi_cmds[] =
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{
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{"ScriptLog", set_scriptlog, NULL, RSRC_CONF, TAKE1,
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"the name of a log for script debugging info"},
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{"ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF, TAKE1,
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"the maximum length (in bytes) of the script debug log"},
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{"ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF, TAKE1,
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"the maximum size (in bytes) to record of a POST request"},
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{NULL}
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};
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static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret,
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int show_errno, char *error)
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{
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FILE *f;
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struct stat finfo;
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ap_log_rerror(APLOG_MARK, show_errno|APLOG_ERR, r,
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"%s: %s", error, r->filename);
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if (!conf->logname ||
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((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
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&& (finfo.st_size > conf->logbytes)) ||
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((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
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"a")) == NULL)) {
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return ret;
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}
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/* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
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fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
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r->args ? "?" : "", r->args ? r->args : "", r->protocol);
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/* "%% 500 /usr/local/apache/cgi-bin */
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fprintf(f, "%%%% %d %s\n", ret, r->filename);
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fprintf(f, "%%error\n%s\n", error);
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ap_pfclose(r->pool, f);
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return ret;
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}
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static int log_script(request_rec *r, cgi_server_conf * conf, int ret,
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char *dbuf, const char *sbuf, BUFF *script_in, BUFF *script_err)
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{
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array_header *hdrs_arr = ap_table_elts(r->headers_in);
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table_entry *hdrs = (table_entry *) hdrs_arr->elts;
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char argsbuffer[HUGE_STRING_LEN];
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FILE *f;
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int i;
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struct stat finfo;
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if (!conf->logname ||
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((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
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&& (finfo.st_size > conf->logbytes)) ||
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((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
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"a")) == NULL)) {
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/* Soak up script output */
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
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continue;
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#ifdef WIN32
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/* Soak up stderr and redirect it to the error log.
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* Script output to stderr is already directed to the error log
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* on Unix, thanks to the magic of fork().
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*/
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
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ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, r,
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"%s", argsbuffer);
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}
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#else
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
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continue;
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#endif
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return ret;
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}
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/* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
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fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
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r->args ? "?" : "", r->args ? r->args : "", r->protocol);
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/* "%% 500 /usr/local/apache/cgi-bin" */
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fprintf(f, "%%%% %d %s\n", ret, r->filename);
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fputs("%request\n", f);
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for (i = 0; i < hdrs_arr->nelts; ++i) {
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if (!hdrs[i].key)
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continue;
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fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
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}
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if ((r->method_number == M_POST || r->method_number == M_PUT)
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&& *dbuf) {
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fprintf(f, "\n%s\n", dbuf);
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}
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fputs("%response\n", f);
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hdrs_arr = ap_table_elts(r->err_headers_out);
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hdrs = (table_entry *) hdrs_arr->elts;
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for (i = 0; i < hdrs_arr->nelts; ++i) {
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if (!hdrs[i].key)
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continue;
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fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
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}
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if (sbuf && *sbuf)
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fprintf(f, "%s\n", sbuf);
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if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
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fputs("%stdout\n", f);
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fputs(argsbuffer, f);
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
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fputs(argsbuffer, f);
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fputs("\n", f);
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}
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if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
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fputs("%stderr\n", f);
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fputs(argsbuffer, f);
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
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fputs(argsbuffer, f);
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fputs("\n", f);
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}
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ap_bclose(script_in);
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ap_bclose(script_err);
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ap_pfclose(r->pool, f);
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return ret;
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}
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/****************************************************************
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*
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* Actual CGI handling...
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*/
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struct cgi_child_stuff {
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#ifdef TPF
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TPF_FORK_CHILD t;
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#endif
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request_rec *r;
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int nph;
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int debug;
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char *argv0;
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};
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static int cgi_child(void *child_stuff, child_info *pinfo)
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{
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struct cgi_child_stuff *cld = (struct cgi_child_stuff *) child_stuff;
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request_rec *r = cld->r;
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char *argv0 = cld->argv0;
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int child_pid;
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#ifdef DEBUG_CGI
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#ifdef OS2
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/* Under OS/2 need to use device con. */
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FILE *dbg = fopen("con", "w");
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#else
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FILE *dbg = fopen("/dev/tty", "w");
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#endif
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int i;
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#endif
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char **env;
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RAISE_SIGSTOP(CGI_CHILD);
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#ifdef DEBUG_CGI
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fprintf(dbg, "Attempting to exec %s as %sCGI child (argv0 = %s)\n",
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r->filename, cld->nph ? "NPH " : "", argv0);
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#endif
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ap_add_cgi_vars(r);
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env = ap_create_environment(r->pool, r->subprocess_env);
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#ifdef DEBUG_CGI
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fprintf(dbg, "Environment: \n");
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for (i = 0; env[i]; ++i)
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fprintf(dbg, "'%s'\n", env[i]);
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#endif
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#ifndef WIN32
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ap_chdir_file(r->filename);
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#endif
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if (!cld->debug)
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ap_error_log2stderr(r->server);
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/* Transumute outselves into the script.
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* NB only ISINDEX scripts get decoded arguments.
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*/
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#ifdef TPF
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return (0);
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#else
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ap_cleanup_for_exec();
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child_pid = ap_call_exec(r, pinfo, argv0, env, 0);
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#if defined(WIN32) || defined(OS2)
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return (child_pid);
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#else
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/* Uh oh. Still here. Where's the kaboom? There was supposed to be an
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* EARTH-shattering kaboom!
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*
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* Oh, well. Muddle through as best we can...
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*
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* Note that only stderr is available at this point, so don't pass in
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* a server to aplog_error.
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*/
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ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed", r->filename);
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exit(0);
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/* NOT REACHED */
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return (0);
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#endif
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#endif /* TPF */
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}
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static int cgi_handler(request_rec *r)
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{
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int retval, nph, dbpos = 0;
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char *argv0, *dbuf = NULL;
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BUFF *script_out, *script_in, *script_err;
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char argsbuffer[HUGE_STRING_LEN];
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int is_included = !strcmp(r->protocol, "INCLUDED");
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void *sconf = r->server->module_config;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(sconf, &cgi_module);
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struct cgi_child_stuff cld;
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if (r->method_number == M_OPTIONS) {
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/* 99 out of 100 CGI scripts, this is all they support */
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r->allowed |= (1 << M_GET);
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r->allowed |= (1 << M_POST);
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return DECLINED;
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}
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if ((argv0 = strrchr(r->filename, '/')) != NULL)
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argv0++;
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else
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argv0 = r->filename;
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nph = !(strncmp(argv0, "nph-", 4));
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if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r))
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return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
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"Options ExecCGI is off in this directory");
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if (nph && is_included)
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return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
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"attempt to include NPH CGI script");
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#if defined(OS2) || defined(WIN32)
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/* Allow for cgi files without the .EXE extension on them under OS/2 */
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if (r->finfo.st_mode == 0) {
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struct stat statbuf;
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char *newfile;
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newfile = ap_pstrcat(r->pool, r->filename, ".EXE", NULL);
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if ((stat(newfile, &statbuf) != 0) || (!S_ISREG(statbuf.st_mode))) {
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return log_scripterror(r, conf, NOT_FOUND, 0,
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"script not found or unable to stat");
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} else {
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r->filename = newfile;
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}
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}
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#else
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if (r->finfo.st_mode == 0)
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return log_scripterror(r, conf, NOT_FOUND, APLOG_NOERRNO,
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"script not found or unable to stat");
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#endif
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if (S_ISDIR(r->finfo.st_mode))
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return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
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"attempt to invoke directory as script");
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if (!ap_suexec_enabled) {
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if (!ap_can_exec(&r->finfo))
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return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
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"file permissions deny server execution");
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}
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if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
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return retval;
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ap_add_common_vars(r);
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cld.argv0 = argv0;
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cld.r = r;
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cld.nph = nph;
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cld.debug = conf->logname ? 1 : 0;
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#ifdef TPF
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cld.t.filename = r->filename;
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cld.t.subprocess_env = r->subprocess_env;
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cld.t.prog_type = FORK_FILE;
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#endif /* TPF */
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#ifdef CHARSET_EBCDIC
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/* XXX:@@@ Is the generated/included output ALWAYS in text/ebcdic format? */
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/* Or must we check the Content-Type first? */
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ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, 1);
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#endif /*CHARSET_EBCDIC*/
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/*
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* we spawn out of r->main if it's there so that we can avoid
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* waiting for free_proc_chain to cleanup in the middle of an
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* SSI request -djg
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*/
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if (!ap_bspawn_child(r->main ? r->main->pool : r->pool, cgi_child,
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(void *) &cld, kill_after_timeout,
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&script_out, &script_in, &script_err)) {
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ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
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"couldn't spawn child process: %s", r->filename);
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return HTTP_INTERNAL_SERVER_ERROR;
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}
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/* Transfer any put/post args, CERN style...
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* Note that we already ignore SIGPIPE in the core server.
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*/
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if (ap_should_client_block(r)) {
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int dbsize, len_read;
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if (conf->logname) {
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dbuf = ap_pcalloc(r->pool, conf->bufbytes + 1);
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dbpos = 0;
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}
|
|
|
|
ap_hard_timeout("copy script args", r);
|
|
|
|
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);
|
|
|
|
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 */
|
|
};
|