107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* errors.c -- error message handlers.
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Copyright (C) 1998 Robert Stone <talby@trap.mtview.ca.us>
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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, or (at your option)
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any later version.
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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "errors.h"
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#include "config.h"
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/* compatibility section */
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#ifdef HAVE_SYSLOG_H
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# include <syslog.h>
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#else /* HAVE_SYSLOG_H */
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#warning no syslog facility? Errors will go to stderr.
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# define syslog(x,y,z)
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# define LOG_DEBUG 7
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# define LOG_WARNING 4
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# define LOG_ERR 3
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#endif
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#ifndef HAVE_VPRINTF
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#error no vprintf? not ANSI C3.159-1989 (``ANSI C'') compliant?
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#endif
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#ifndef HAVE_STRERROR
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#define strerror(x) "system error"
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#endif
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/* end compatibility section */
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static char *progname = NULL;
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static int show_status = 0;
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static int use_syslog = 0;
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static int message(int, const char *);
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int initerrors(char *pn, int type, int stat) {
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#ifdef HAVE_SYSLOG_H
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if(type == 0 || type == 1) use_syslog = type;
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#endif /* HAVE_SYSLOG_H */
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if(pn != NULL) progname = pn;
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if(stat == 0 || stat == 1) show_status = stat;
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return(0);
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}
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int status(const char *fmt, ...) {
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static char buf[1024];
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va_list args;
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if(!show_status) return(0);
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va_start(args, fmt);
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vsprintf(buf, fmt, args);
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va_end(args);
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return(message(LOG_DEBUG, buf));
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}
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int warn(const char *fmt, ...) {
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static char buf[1024];
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va_list args;
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va_start(args, fmt);
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vsprintf(buf, fmt, args);
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va_end(args);
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return(message(LOG_WARNING, buf));
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}
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int panic(const char *fmt, ...) {
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static char buf[1024];
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va_list args;
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va_start(args, fmt);
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vsprintf(buf, fmt, args);
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va_end(args);
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message(LOG_ERR, buf);
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exit(1);
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}
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int message(int priority, const char *msg) {
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char buf[1024];
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/* only handle errno if this is not an informational message */
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if(errno && priority < 5) {
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sprintf(buf, "%s: %s", msg, strerror(errno));
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errno = 0;
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} else strcpy(buf, msg);
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if(use_syslog) syslog(priority, "%s", buf);
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else fprintf(stderr, "%s: %s\n", progname, buf);
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return(0);
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}
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