Mercurial > hg > mlmmj
view src/log_oper.c @ 919:e371a935a0cd default tip master
Added tag RELEASE_1_3_0 for changeset 570dd6d4942b
author | Ben Schmidt |
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date | Thu, 25 May 2017 09:08:47 +1000 |
parents | e27531f82b91 |
children |
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/* Copyright (C) 2005 Mads Martin Joergensen < mmj AT mmj DOT dk > * * $Id$ * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #include <stdio.h> #include <errno.h> #include <fcntl.h> #include <time.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <string.h> #include <stdlib.h> #include <stdarg.h> #include "mlmmj.h" #include "log_error.h" #include "log_oper.h" #include "strgen.h" #include "mylocking.h" #include "wrappers.h" #include "memory.h" int log_oper(const char *prefix, const char *basename, const char *fmt, ...) { int fd, statres; char ct[26], *logstr, *logfilename, *tmp, log_msg[256]; struct stat st; time_t t; va_list ap; size_t i; logfilename = concatstr(3, prefix, "/", basename); statres = lstat(logfilename, &st); if(statres < 0 && errno != ENOENT) { log_error(LOG_ARGS, "Could not stat logfile %s", logfilename); myfree(logfilename); return -1; } if(statres >= 0 && st.st_size > (off_t)OPLOGSIZE) { tmp = concatstr(2, logfilename, ".rotated"); if(rename(logfilename, tmp) < 0) { log_error(LOG_ARGS, "Could not rename %s,%s", logfilename, tmp); } myfree(tmp); } fd = open(logfilename, O_RDWR|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR); if(fd < 0) { log_error(LOG_ARGS, "Could not open %s", logfilename); myfree(logfilename); return -1; } if((time(&t) == (time_t)-1) || (ctime_r(&t, ct) == NULL)) strncpy(ct, "Unknown time", sizeof(ct)); else ct[24] = '\0'; if(myexcllock(fd) < 0) { log_error(LOG_ARGS, "Could not lock %s", logfilename); myfree(logfilename); return -1; } va_start(ap, fmt); i = vsnprintf(log_msg, sizeof(log_msg), fmt, ap); if(i < 0) { va_end(ap); log_error(LOG_ARGS, "Failed to format log message: %s", fmt); return -1; } if(i > sizeof(log_msg)) log_error(LOG_ARGS, "Log message truncated"); va_end(ap); logstr = concatstr(4, ct, " ", log_msg, "\n"); if(writen(fd, logstr, strlen(logstr)) < 0) log_error(LOG_ARGS, "Could not write to %s", logfilename); close(fd); myfree(logfilename); myfree(logstr); return 0; }