94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
// Copyright (C) 2007-2009 Hendrik Baecker <andurin@process-zero.de>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as
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// published by the Free Software Foundation;
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <stdio.h>
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#include <sys/time.h>
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#include "../include/config.h"
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#include "../include/pnp.h"
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int write_log(char *);
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extern char* log_file;
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extern int use_syslog;
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extern int loglevel;
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extern int max_logfile_size;
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int do_log(char *message) {
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if (use_syslog) {
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syslog(LOG_NOTICE, "%s", message);
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return OK;
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} else if (use_syslog == FALSE) {
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if (write_log(message)==0)
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return OK;
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else
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return ERROR;
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}
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return OK;
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}
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int write_log(char *message) {
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int fd;
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long filelen;
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struct timeval tv;
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char temp_buffer[2048];
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time_t curtime;
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gettimeofday(&tv, NULL);
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curtime = tv.tv_sec;
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strftime(temp_buffer, sizeof(temp_buffer) - 1, "[%m-%d-%Y %T] NPCD: ",
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localtime(&curtime));
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strcat(temp_buffer, message);
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/* open / create logfile */
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if ((fd = open(log_file, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR
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| S_IRGRP | S_IROTH)) == -1) {
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printf("Cannot open log file %s\n", log_file);
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return 0;
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}
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/* write log message */
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if (write(fd, temp_buffer, strlen(temp_buffer)) != strlen(temp_buffer)) {
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perror("NPCD: Error writing to log file");
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close(fd);
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return 0;
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}
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/* rotate logfile if size > max_logfile_size */
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if ((filelen = lseek(fd, 0L, SEEK_END)) > max_logfile_size) {
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/* LOG(0, "Begin Logrotation!\n"); */
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char buffer[PATH_MAX];
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close(fd);
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/* delete .old log file */
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strncpy(buffer, log_file, sizeof(buffer) - 1);
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strncat(buffer, ".old", sizeof(buffer) - 1);
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unlink(buffer);
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/* rename log_file to log_file.old */
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if (rename(log_file, buffer) != 0) {
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snprintf(buffer, sizeof(buffer) - 1, "Error rename() logfile - %s",
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strerror(errno));
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LOG(0, buffer);
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//perror("Error renaming logfile\n");
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return 0;
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}
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LOG(0, "Logfile rotated!\n");
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} else {
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close(fd);
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}
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return filelen;
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}
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