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* zassert.h: New header file to declare a quagga-specific assert macro. * log.c: (_zlog_assert_failed) New function called when assert fails to log the error and abort. * zebra.h: Include "zassert.h" instead of <assert.h>. * regex.c: Include "zassert.h" instead of <assert.h>. * dict.c: Include "zassert.h" instead of <assert.h>.
493 lines
9.8 KiB
C
493 lines
9.8 KiB
C
/* Logging of zebra
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* Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include <zebra.h>
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#include "log.h"
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#include "memory.h"
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#include "command.h"
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struct zlog *zlog_default = NULL;
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const char *zlog_proto_names[] =
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{
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"NONE",
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"DEFAULT",
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"ZEBRA",
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"RIP",
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"BGP",
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"OSPF",
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"RIPNG",
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"OSPF6",
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"ISIS",
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"MASC",
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NULL,
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};
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const char *zlog_priority[] =
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{
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"emergencies",
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"alerts",
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"critical",
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"errors",
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"warnings",
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"notifications",
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"informational",
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"debugging",
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NULL,
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};
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/* For time string format. */
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#define TIME_BUF 27
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/* Utility routine for current time printing. */
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static void
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time_print (FILE *fp)
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{
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int ret;
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char buf [TIME_BUF];
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time_t clock;
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struct tm *tm;
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time (&clock);
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tm = localtime (&clock);
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ret = strftime (buf, TIME_BUF, "%Y/%m/%d %H:%M:%S", tm);
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if (ret == 0) {
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zlog_warn ("strftime error");
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}
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fprintf (fp, "%s ", buf);
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}
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/* va_list version of zlog. */
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static void
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vzlog (struct zlog *zl, int priority, const char *format, va_list args)
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{
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/* If zlog is not specified, use default one. */
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if (zl == NULL)
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zl = zlog_default;
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/* When zlog_default is also NULL, use stderr for logging. */
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if (zl == NULL)
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{
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time_print (stderr);
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fprintf (stderr, "%s: ", "unknown");
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vfprintf (stderr, format, args);
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fprintf (stderr, "\n");
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fflush (stderr);
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/* In this case we return at here. */
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return;
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}
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/* only log this information if it has not been masked out */
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if ( priority > zl->maskpri )
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return ;
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/* Syslog output */
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if (zl->flags & ZLOG_SYSLOG)
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{
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va_list ac;
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va_copy(ac, args);
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vsyslog (priority|zlog_default->facility, format, ac);
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va_end(ac);
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}
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/* File output. */
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if (zl->flags & ZLOG_FILE)
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{
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va_list ac;
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time_print (zl->fp);
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if (zl->record_priority)
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fprintf (zl->fp, "%s: ", zlog_priority[priority]);
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fprintf (zl->fp, "%s: ", zlog_proto_names[zl->protocol]);
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va_copy(ac, args);
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vfprintf (zl->fp, format, ac);
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va_end(ac);
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fprintf (zl->fp, "\n");
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fflush (zl->fp);
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}
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/* stdout output. */
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if (zl->flags & ZLOG_STDOUT)
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{
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va_list ac;
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time_print (stdout);
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if (zl->record_priority)
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fprintf (stdout, "%s: ", zlog_priority[priority]);
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fprintf (stdout, "%s: ", zlog_proto_names[zl->protocol]);
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va_copy(ac, args);
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vfprintf (stdout, format, ac);
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va_end(ac);
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fprintf (stdout, "\n");
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fflush (stdout);
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}
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/* stderr output. */
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if (zl->flags & ZLOG_STDERR)
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{
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va_list ac;
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time_print (stderr);
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if (zl->record_priority)
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fprintf (stderr, "%s: ", zlog_priority[priority]);
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fprintf (stderr, "%s: ", zlog_proto_names[zl->protocol]);
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va_copy(ac, args);
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vfprintf (stderr, format, ac);
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va_end(ac);
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fprintf (stderr, "\n");
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fflush (stderr);
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}
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/* Terminal monitor. */
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vty_log (zlog_proto_names[zl->protocol], format, args);
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}
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static char *
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str_append(char *dst, int len, const char *src)
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{
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while ((len-- > 0) && *src)
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*dst++ = *src++;
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return dst;
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}
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static char *
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num_append(char *s, int len, u_long x)
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{
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char buf[30];
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char *t = &buf[29];
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*t = '\0';
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while (x && (t > buf))
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{
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*--t = '0'+(x % 10);
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x /= 10;
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}
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return str_append(s,len,t);
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}
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/* Note: the goal here is to use only async-signal-safe functions. */
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void
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zlog_signal(int signo, const char *action)
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{
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time_t now;
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char buf[sizeof("DEFAULT: Received signal S at T; aborting...")+60];
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char *s = buf;
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#define LOC s,buf+sizeof(buf)-s
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time(&now);
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if (zlog_default)
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{
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s = str_append(LOC,zlog_proto_names[zlog_default->protocol]);
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*s++ = ':';
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*s++ = ' ';
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}
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s = str_append(LOC,"Received signal ");
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s = num_append(LOC,signo);
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s = str_append(LOC," at ");
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s = num_append(LOC,now);
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s = str_append(LOC,"; ");
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s = str_append(LOC,action);
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*s++ = '\n';
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#define DUMP(FP) write(fileno(FP),buf,s-buf);
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if (!zlog_default)
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DUMP(stderr)
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else
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{
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if ((zlog_default->flags & ZLOG_FILE) && zlog_default->fp)
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DUMP(zlog_default->fp)
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if (zlog_default->flags & ZLOG_STDOUT)
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DUMP(stdout)
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if (zlog_default->flags & ZLOG_STDERR)
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DUMP(stderr)
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/* Is there a signal-safe way to send a syslog message? */
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}
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#undef DUMP
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/* Now try for a backtrace. */
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#ifdef HAVE_GLIBC_BACKTRACE
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{
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void *array[20];
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size_t size;
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size = backtrace(array,sizeof(array)/sizeof(array[0]));
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s = buf;
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s = str_append(LOC,"Backtrace for ");
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s = num_append(LOC,size);
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s = str_append(LOC," stack frames:\n");
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#define DUMP(FP) { \
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write(fileno(FP),buf,s-buf); \
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backtrace_symbols_fd(array, size, fileno(FP)); \
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}
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if (!zlog_default)
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DUMP(stderr)
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else
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{
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if ((zlog_default->flags & ZLOG_FILE) && zlog_default->fp)
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DUMP(zlog_default->fp)
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if (zlog_default->flags & ZLOG_STDOUT)
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DUMP(stdout)
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if (zlog_default->flags & ZLOG_STDERR)
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DUMP(stderr)
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/* Is there a signal-safe way to send a syslog message? */
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}
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#undef DUMP
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}
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#endif /* HAVE_GLIBC_BACKTRACE */
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#undef LOC
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}
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void
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zlog (struct zlog *zl, int priority, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vzlog (zl, priority, format, args);
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va_end (args);
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}
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#define ZLOG_FUNC(FUNCNAME,PRIORITY) \
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void \
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FUNCNAME(const char *format, ...) \
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{ \
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va_list args; \
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va_start(args, format); \
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vzlog (NULL, PRIORITY, format, args); \
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va_end(args); \
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}
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ZLOG_FUNC(zlog_err, LOG_ERR)
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ZLOG_FUNC(zlog_warn, LOG_WARNING)
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ZLOG_FUNC(zlog_info, LOG_INFO)
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ZLOG_FUNC(zlog_notice, LOG_NOTICE)
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ZLOG_FUNC(zlog_debug, LOG_DEBUG)
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#undef ZLOG_FUNC
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#define PLOG_FUNC(FUNCNAME,PRIORITY) \
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void \
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FUNCNAME(struct zlog *zl, const char *format, ...) \
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{ \
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va_list args; \
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va_start(args, format); \
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vzlog (zl, PRIORITY, format, args); \
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va_end(args); \
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}
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PLOG_FUNC(plog_err, LOG_ERR)
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PLOG_FUNC(plog_warn, LOG_WARNING)
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PLOG_FUNC(plog_info, LOG_INFO)
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PLOG_FUNC(plog_notice, LOG_NOTICE)
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PLOG_FUNC(plog_debug, LOG_DEBUG)
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#undef PLOG_FUNC
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void
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_zlog_assert_failed (const char *assertion, const char *file,
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unsigned int line, const char *function)
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{
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zlog_err("Assertion `%s' failed in file %s, line %u, function %s",
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assertion,file,line,(function ? function : "?"));
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abort();
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}
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/* Open log stream */
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struct zlog *
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openzlog (const char *progname, int flags, zlog_proto_t protocol,
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int syslog_flags, int syslog_facility)
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{
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struct zlog *zl;
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zl = XMALLOC(MTYPE_ZLOG, sizeof (struct zlog));
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memset (zl, 0, sizeof (struct zlog));
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zl->ident = progname;
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zl->flags = flags;
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zl->protocol = protocol;
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zl->facility = syslog_facility;
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zl->maskpri = LOG_DEBUG;
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zl->record_priority = 0;
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openlog (progname, syslog_flags, zl->facility);
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return zl;
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}
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void
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closezlog (struct zlog *zl)
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{
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closelog();
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fclose (zl->fp);
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XFREE (MTYPE_ZLOG, zl);
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}
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/* Called from command.c. */
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void
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zlog_set_flag (struct zlog *zl, int flags)
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{
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if (zl == NULL)
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zl = zlog_default;
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zl->flags |= flags;
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}
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void
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zlog_reset_flag (struct zlog *zl, int flags)
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{
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if (zl == NULL)
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zl = zlog_default;
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zl->flags &= ~flags;
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}
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int
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zlog_set_file (struct zlog *zl, const char *filename)
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{
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FILE *fp;
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mode_t oldumask;
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/* There is opend file. */
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zlog_reset_file (zl);
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/* Set default zl. */
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if (zl == NULL)
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zl = zlog_default;
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/* Open file. */
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oldumask = umask (0777 & ~LOGFILE_MASK);
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fp = fopen (filename, "a");
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if (fp == NULL)
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{
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umask(oldumask);
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return 0;
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}
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umask(oldumask);
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/* Set flags. */
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zl->filename = strdup (filename);
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zl->flags |= ZLOG_FILE;
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zl->fp = fp;
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return 1;
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}
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/* Reset opend file. */
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int
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zlog_reset_file (struct zlog *zl)
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{
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if (zl == NULL)
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zl = zlog_default;
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zl->flags &= ~ZLOG_FILE;
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if (zl->fp)
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fclose (zl->fp);
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zl->fp = NULL;
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if (zl->filename)
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free (zl->filename);
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zl->filename = NULL;
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return 1;
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}
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/* Reopen log file. */
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int
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zlog_rotate (struct zlog *zl)
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{
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FILE *fp;
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if (zl == NULL)
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zl = zlog_default;
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if (zl->fp)
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fclose (zl->fp);
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zl->fp = NULL;
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if (zl->filename)
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{
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mode_t oldumask;
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oldumask = umask (0777 & ~LOGFILE_MASK);
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fp = fopen (zl->filename, "a");
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if (fp == NULL)
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{
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umask(oldumask);
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return -1;
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}
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umask(oldumask);
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zl->fp = fp;
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}
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return 1;
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}
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/* Message lookup function. */
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const char *
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lookup (struct message *mes, int key)
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{
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struct message *pnt;
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for (pnt = mes; pnt->key != 0; pnt++)
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if (pnt->key == key)
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return pnt->str;
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return "";
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}
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/* Very old hacky version of message lookup function. Still partly
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used in bgpd and ospfd. FIXME Seems that it's not used any more. */
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const char *
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mes_lookup (struct message *meslist, int max, int index)
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{
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if (index < 0 || index >= max)
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{
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zlog_err ("message index out of bound: %d", max);
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return NULL;
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}
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return meslist[index].str;
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}
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/* Wrapper around strerror to handle case where it returns NULL. */
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const char *
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safe_strerror(int errnum)
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{
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const char *s = strerror(errnum);
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return (s != NULL) ? s : "Unknown error";
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}
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