Markus Armbruster
9c94a23709
(logfd, logopen): New. (loginit): Set logfd, return success. (logerror): Use logfd. (logreopen): New. (relo, main): Use it.
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* log.c: Log an Empire error to a file
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*
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* Known contributors to this file:
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* Dave Pare, 1989
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*/
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#include <config.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <unistd.h>
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#include "misc.h"
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#include "optlist.h"
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#include "player.h"
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#include "prototypes.h"
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/* Debugging? If yes call abort() on internal error. */
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int debug = 0;
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static char logfile[32];
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static int logfd = -1;
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static int logopen(void);
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/*
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* Points log file at PROGRAM.log
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*/
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int
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loginit(char *program)
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{
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sprintf(logfile, "%.*s.log", (int)sizeof(logfile) - 5, program);
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logfd = logopen();
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return logfd;
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}
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static int
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logopen(void)
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{
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int fd;
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fd = open(logfile, O_WRONLY | O_CREAT | O_APPEND, S_IRWUG);
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if (fd < 0)
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logerror("Can't open %s (%s)", logfile, strerror(errno));
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return fd;
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}
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int
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logreopen(void)
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{
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int newfd, res;
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if ((newfd = logopen()) < 0)
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return -1;
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res = close(logfd);
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logfd = newfd;
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if (res < 0)
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logerror("Can't close %s (%s)", logfile, strerror(errno));
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return res;
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}
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/*
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* Write a line to the log file and to stderr.
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* Messages are silently truncated after 512 characters or a newline.
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*/
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void
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logerror(char *format, ...)
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{
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enum {
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ctime_len = 24, /* output of ctime() less the newline */
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msg_space = 512 /* space for formatted message */
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};
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va_list list;
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time_t now;
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char buf[ctime_len + 1 + msg_space + 2];
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char *msg, *p;
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va_start(list, format);
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msg = buf + ctime_len + 1;
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vsnprintf(msg, msg_space, format, list);
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buf[sizeof(buf)-2] = 0;
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p = msg + strlen(msg);
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p[0] = '\n';
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p[1] = 0;
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p = strchr(msg, '\n');
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p[1] = 0;
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fputs(msg, stderr);
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if (logfd >= 0) {
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time(&now);
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memcpy(buf, ctime(&now), ctime_len);
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buf[ctime_len] = ' ';
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write(logfd, buf, strlen(buf));
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}
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va_end(list);
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}
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/*
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* Log internal error MSG occured in FILE:LINE.
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* If debugging, call abort(), else return 1.
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*/
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int
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oops(char *msg, char *file, int line)
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{
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logerror("Oops: %s in %s:%d", msg ? msg : "bug", file, line);
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if (debug) abort();
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return 1;
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}
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/*
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* Report out-of-memory condition and terminate the program.
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* Use this with restraint! Clean error recovery is preferable, but
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* not always feasible (e.g. halfway through the update) or worthwhile
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* (during server startup).
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*/
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void
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exit_nomem(void)
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{
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logerror("Memory exhausted");
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exit(1);
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}
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