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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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/>.
*/
/*
* Simple program to rotate Apache logs without having to kill the server.
*
* Contributed by Ben Laurie <ben@algroup.co.uk>
*
* 12 Mar 1996
*
* Ported to APR by Mladen Turk <mturk@mappingsoft.com>
*
* 23 Sep 2001
*/
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_errno.h"
#include "apr_file_io.h"
#include "apr_file_info.h"
#include "apr_general.h"
#include "apr_time.h"
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_STRINGS_H
#include <strings.h>
#endif
#define BUFSIZE 65536
#define ERRMSGSZ 82
#ifndef MAX_PATH
#define MAX_PATH 1024
#endif
int main (int argc, char *argv[])
{
char buf[BUFSIZE], buf2[MAX_PATH], errbuf[ERRMSGSZ];
int tLogEnd = 0, tRotation, utc_offset = 0;
int nMessCount = 0;
apr_size_t nRead, nWrite;
int use_strftime = 0;
int now;
char *szLogRoot;
apr_file_t *f_stdin, *nLogFD = NULL, *nLogFDprev = NULL;
apr_pool_t *pool;
apr_initialize();
atexit(apr_terminate);
apr_pool_create(&pool, NULL);
if (argc < 3 || argc > 4) {
fprintf(stderr,
"Usage: %s <logfile> <rotation time in seconds> "
"[offset minutes from UTC]\n\n",
argv[0]);
#ifdef OS2
fprintf(stderr,
"Add this:\n\nTransferLog \"|%s.exe /some/where 86400\"\n\n",
argv[0]);
#else
fprintf(stderr,
"Add this:\n\nTransferLog \"|%s /some/where 86400\"\n\n",
argv[0]);
#endif
fprintf(stderr,
"to httpd.conf. The generated name will be /some/where.nnnn "
"where nnnn is the\nsystem time at which the log nominally "
"starts (N.B. this time will always be a\nmultiple of the "
"rotation time, so you can synchronize cron scripts with it).\n"
"At the end of each rotation time a new log is started.\n");
exit(1);
}
szLogRoot = argv[1];
if (argc >= 4) {
utc_offset = atoi(argv[3]) * 60;
}
tRotation = atoi(argv[2]);
if (tRotation <= 0) {
fprintf(stderr, "Rotation time must be > 0\n");
exit(6);
}
use_strftime = (strchr(szLogRoot, '%') != NULL);
if (apr_file_open_stdin(&f_stdin, pool) != APR_SUCCESS) {
fprintf(stderr, "Unable to open stdin\n");
exit(1);
}
for (;;) {
nRead = sizeof(buf);
if (apr_file_read(f_stdin, buf, &nRead) != APR_SUCCESS)
exit(3);
now = (int)(apr_time_now() / APR_USEC_PER_SEC) + utc_offset;
if (nRead == 0)
exit(3);
if (nLogFD != NULL && (now >= tLogEnd || nRead < 0)) {
nLogFDprev = nLogFD;
nLogFD = NULL;
}
if (nLogFD == NULL) {
int tLogStart = (now / tRotation) * tRotation;
if (use_strftime) {
apr_time_t tNow = tLogStart * APR_USEC_PER_SEC;
apr_time_exp_t e;
apr_size_t rs;
apr_explode_gmt(&e, tNow);
apr_strftime(buf2, &rs, sizeof(buf2), szLogRoot, &e);
}
else {
sprintf(buf2, "%s.%010d", szLogRoot, tLogStart);
}
tLogEnd = tLogStart + tRotation;
apr_file_open(&nLogFD, buf2, APR_READ | APR_WRITE | APR_CREATE | APR_APPEND,
APR_OS_DEFAULT, pool);
if (nLogFD == NULL) {
/* Uh-oh. Failed to open the new log file. Try to clear
* the previous log file, note the lost log entries,
* and keep on truckin'. */
if (nLogFDprev == NULL) {
fprintf(stderr, "1 Previous file handle doesn't exists %s\n", buf2);
exit(2);
}
else {
nLogFD = nLogFDprev;
sprintf(errbuf,
"Resetting log file due to error opening "
"new log file. %10d messages lost.\n",
nMessCount);
nWrite = strlen(errbuf);
apr_file_trunc(nLogFD, 0);
if (apr_file_write(nLogFD, errbuf, &nWrite) != APR_SUCCESS) {
fprintf(stderr, "Error witing to the file %s\n", buf2);
exit(2);
}
}
}
else if (nLogFDprev) {
apr_file_close(nLogFDprev);
}
nMessCount = 0;
}
do {
nWrite = nRead;
apr_file_write(nLogFD, buf, &nWrite);
} while (nWrite < 0 && errno == EINTR);
if (nWrite != nRead) {
nMessCount++;
sprintf(errbuf,
"Error writing to log file. "
"%10d messages lost.\n",
nMessCount);
nWrite = strlen(errbuf);
apr_file_trunc(nLogFD, 0);
if (apr_file_write(nLogFD, errbuf, &nWrite) != APR_SUCCESS) {
fprintf(stderr, "Error witing to the file %s\n", buf2);
exit(2);
}
}
else {
nMessCount++;
}
}
/* Of course we never, but prevent compiler warnings */
return 0;
}
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