2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2010, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * log.c: Log an Empire error to a file
30 * Known contributors to this file:
32 * Markus Armbruster, 2003-2009
47 #include "prototypes.h"
49 void (*oops_handler)(void) = abort;
51 static char logfile[32];
52 static int logfd = -1;
54 static int logopen(void);
57 * Points log file at PROGRAM.log
60 loginit(char *program)
62 sprintf(logfile, "%.*s.log", (int)sizeof(logfile) - 5, program);
72 fd = open(logfile, O_WRONLY | O_CREAT | O_APPEND,
73 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
75 logerror("Can't open %s (%s)", logfile, strerror(errno));
84 if ((newfd = logopen()) < 0)
89 logerror("Can't close %s (%s)", logfile, strerror(errno));
94 * Write a line to the log file and to stderr.
95 * Messages are silently truncated after 512 characters or a newline.
98 logerror(char *format, ...)
101 ctime_len = 24, /* output of ctime() less the newline */
102 msg_space = 512 /* space for formatted message */
106 char buf[ctime_len + 1 + msg_space + 2];
109 va_start(list, format);
110 msg = buf + ctime_len + 1;
111 vsnprintf(msg, msg_space, format, list);
112 buf[sizeof(buf)-2] = 0;
113 p = msg + strlen(msg);
116 p = strchr(msg, '\n');
121 memcpy(buf, ctime(&now), ctime_len);
122 buf[ctime_len] = ' ';
123 write(logfd, buf, strlen(buf));
129 * Log internal error MSG occured in FILE:LINE.
130 * Call oops handler, and if it returns, return 1.
131 * Oops handler defaults to abort().
134 oops(char *msg, char *file, int line)
136 logerror("Oops: %s in %s:%d", msg ? msg : "bug", file, line);
142 * Report out-of-memory condition and terminate the program.
143 * Use this with restraint! Clean error recovery is preferable, but
144 * not always feasible (e.g. halfway through the update) or worthwhile
145 * (during server startup).
150 logerror("Memory exhausted");