/* * %CopyrightBegin% * * Copyright Ericsson AB 1996-2016. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * %CopyrightEnd% */ #include <stdio.h> #include <stdlib.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); }