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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 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
*/
#include "apr.h"
#include <stdlib.h>
#include <time.h>
#include <errno.h>
#if APR_HAVE_STDIO_H
#include <stdio.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_IO_H
#include <io.h>
#endif
#if APR_HAVE_FCNTL_H
#include <fcntl.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];
time_t tLogEnd = 0, tRotation;
int nLogFD = -1, nLogFDprev = -1, nMessCount = 0, nRead, nWrite;
char *szLogRoot;
if (argc != 3) {
fprintf(stderr,
"%s <logfile> <rotation time in seconds>\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];
tRotation = atoi(argv[2]);
if (tRotation <= 0) {
fprintf(stderr, "Rotation time must be > 0\n");
exit(6);
}
for (;;) {
nRead = read(0, buf, sizeof buf);
if (nRead == 0)
exit(3);
if (nRead < 0)
if (errno != EINTR)
exit(4);
if (nLogFD >= 0 && (time(NULL) >= tLogEnd || nRead < 0)) {
nLogFDprev = nLogFD;
nLogFD = -1;
}
if (nLogFD < 0) {
time_t tLogStart = (time(NULL) / tRotation) * tRotation;
sprintf(buf2, "%s.%010d", szLogRoot, (int) tLogStart);
tLogEnd = tLogStart + tRotation;
nLogFD = open(buf2, O_WRONLY | O_CREAT | O_APPEND, 0666);
if (nLogFD < 0) {
/* 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 == -1) {
perror(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);
#ifdef WIN32
chsize(nLogFD, 0);
#else
ftruncate(nLogFD, 0);
#endif
write(nLogFD, errbuf, nWrite);
}
}
else {
close(nLogFDprev);
}
nMessCount = 0;
}
do {
nWrite = write(nLogFD, buf, nRead);
} while (nWrite < 0 && errno == EINTR);
if (nWrite != nRead) {
nMessCount++;
sprintf(errbuf,
"Error writing to log file. "
"%10d messages lost.\n",
nMessCount);
nWrite = strlen(errbuf);
#ifdef WIN32
chsize(nLogFD, 0);
#else
ftruncate(nLogFD, 0);
#endif
write (nLogFD, errbuf, nWrite);
}
else {
nMessCount++;
}
}
/* Of course we never, but prevent compiler warnings */
return 0;
}
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