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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
/* arguments */
#define MODE 1
#define OWNPATH 2
#define SYSLOGCONF 3
#define NARG 3
/* status codes */
#define OK 0
#define ARG_ERROR -1
#define FILE_ERROR -2
#define KILL_ERROR -3
#define PIPE_NOT_FOUND 1
/* hardwired */
#define SYSLOG_PID "/etc/syslog.pid"
#define PIPENAME "syslog.otp"
#define SYSLOGCONF_ORIG "syslog.conf.ORIG"
#define SYSLOGCONF_OTP "syslog.conf.OTP"
#define BUFFER_SIZE 1001
#define MAXNAME_SIZE 1001
#define FALSE 0
#define TRUE 1
#define WAIT 1
int main(int argc, char *argv[])
/* usage: mod_syslog mode ownpath syslogconf */
{
int syslogd_pid, n_lines_copied=0;
int otp_sw, find_sw=FALSE;
char buf[BUFFER_SIZE], pipename[MAXNAME_SIZE], srcname[MAXNAME_SIZE];
FILE *srcfile, *destfile, *pidfile;
void make_exit(int);
/* enough arguments? */
if(argc < NARG+1)
make_exit(ARG_ERROR);
/* enable OTP or not */
if(strcmp(argv[MODE], "otp") == 0)
otp_sw = TRUE;
else if(strcmp(argv[MODE], "nootp") == 0)
otp_sw = FALSE;
else
make_exit(ARG_ERROR);
/* make pipename */
strcpy(pipename, argv[OWNPATH]);
strcat(pipename, "/");
strcat(pipename, PIPENAME);
/* remove old pipe and make a new one */
if(otp_sw){
/* remove */
unlink(pipename);
/* make a new */
if(mknod(pipename, S_IFIFO | S_IRUSR | S_IWUSR | S_IRGRP |
S_IWGRP | S_IROTH | S_IWOTH, (dev_t)0) != 0)
make_exit(FILE_ERROR);
}
/* make source filename */
strcpy(srcname, argv[OWNPATH]);
strcat(srcname, "/");
strcat(srcname, otp_sw?SYSLOGCONF_OTP:SYSLOGCONF_ORIG);
/* open source and destination, exit if error */
if((srcfile = fopen(srcname, "r")) == NULL ||
(destfile = fopen(argv[SYSLOGCONF], "w")) == NULL)
make_exit(FILE_ERROR);
/* copy source and destination, exit if error */
while(fgets(buf, BUFFER_SIZE-1, srcfile) != NULL){
/* find_sw |= strstr(buf, PIPENAME) != NULL; */
n_lines_copied++;
if(fputs(buf, destfile) == EOF)
make_exit(FILE_ERROR);
}
if(ferror(srcfile) || n_lines_copied == 0)
make_exit(FILE_ERROR);
/* open pidfile, exit if error */
if((pidfile = fopen(SYSLOG_PID, "r")) == NULL)
make_exit(FILE_ERROR);
/* read pid for syslogd, exit if error */
if(fscanf(pidfile, "%d", &syslogd_pid) == 0)
make_exit(FILE_ERROR);
/* send HUP to syslogd, exit if error */
if(syslogd_pid < 0 || kill((pid_t)syslogd_pid, SIGHUP) != 0)
make_exit(KILL_ERROR);
/* remove pipe */
if(!otp_sw){
sleep((unsigned)WAIT);
unlink(pipename);
}
/* ending successful or with warning */
/* if(!find_sw && otp_sw)
make_exit(PIPE_NOT_FOUND);
else */
make_exit(OK);
return 0;
}
void make_exit(int exit_code)
{
printf("%d", exit_code);
exit(0);
}
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