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Celestin Apprentice 4
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Apache 1.0
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mod_log_agent.c
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1995-12-04
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/* ====================================================================
* Copyright (c) 1995 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.
*
* 5. 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
* IT'S 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/>.
*
*/
#include "httpd.h"
#include "http_config.h"
#define DEFAULT_AGENTLOG "logs/agent_log"
module agent_log_module;
static int xfer_flags = ( O_WRONLY | O_APPEND | O_CREAT );
static mode_t xfer_mode = ( S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
typedef struct {
char *fname;
int agent_fd;
} agent_log_state;
void *make_agent_log_state (pool *p, server_rec *s)
{
agent_log_state *cls =
(agent_log_state *)palloc (p, sizeof (agent_log_state));
cls->fname = DEFAULT_AGENTLOG;
cls->agent_fd = -1;
return (void *)cls;
}
char *set_agent_log (cmd_parms *parms, void *dummy, char *arg)
{
agent_log_state *cls = get_module_config (parms->server->module_config,
&agent_log_module);
cls->fname = arg;
return NULL;
}
command_rec agent_log_cmds[] = {
{ "AgentLog", set_agent_log, NULL, RSRC_CONF, TAKE1,
"the filename of the agent log" },
{ NULL }
};
void agent_log_child (void *cmd)
{
/* Child process code for 'AgentLog "|..."';
* may want a common framework for this, since I expect it will
* be common for other foo-loggers to want this sort of thing...
*/
cleanup_for_exec();
signal (SIGHUP, SIG_IGN);
execl (SHELL_PATH, SHELL_PATH, "-c", (char *)cmd, NULL);
exit (1);
}
void open_agent_log (server_rec *s, pool *p)
{
agent_log_state *cls = get_module_config (s->module_config,
&agent_log_module);
char *fname = server_root_relative (p, cls->fname);
if (cls->agent_fd > 0) return; /* virtual log shared w/main server */
if (*cls->fname == '|') {
FILE *dummy;
spawn_child(p, agent_log_child, (void *)(cls->fname+1),
kill_after_timeout, &dummy, NULL);
if (dummy == NULL) {
fprintf (stderr, "Couldn't fork child for AgentLog process\n");
exit (1);
}
cls->agent_fd = fileno (dummy);
}
else if((cls->agent_fd = popenf(p, fname, xfer_flags, xfer_mode)) < 0) {
fprintf(stderr,"httpd: could not open transfer log file %s.\n", fname);
perror("open");
exit(1);
}
}
void init_agent_log (server_rec *s, pool *p)
{
for (; s; s = s->next) open_agent_log (s, p);
}
int agent_log_transaction(request_rec *orig)
{
agent_log_state *cls = get_module_config (orig->server->module_config,
&agent_log_module);
char str[HUGE_STRING_LEN];
char *agent;
request_rec *r;
if(cls->agent_fd <0)
return OK;
for (r = orig; r->next; r = r->next)
continue;
agent = table_get(orig->headers_in, "User-Agent");
if(agent != NULL)
{
sprintf(str, "%s\n", agent);
write(cls->agent_fd, str, strlen(str));
}
return OK;
}
module agent_log_module = {
STANDARD_MODULE_STUFF,
init_agent_log, /* initializer */
NULL, /* create per-dir config */
NULL, /* merge per-dir config */
make_agent_log_state, /* server config */
NULL, /* merge server config */
agent_log_cmds, /* command table */
NULL, /* handlers */
NULL, /* filename translation */
NULL, /* check_user_id */
NULL, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* fixups */
agent_log_transaction /* logger */
};