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[src/trunk]: src/sbin/savecore - always print corrupted dump messages instead...
details: https://anonhg.NetBSD.org/src/rev/9e110ccd7b2b
branches: trunk
changeset: 769513:9e110ccd7b2b
user: christos <christos%NetBSD.org@localhost>
date: Mon Sep 12 21:22:07 2011 +0000
description:
- always print corrupted dump messages instead of silently failing
- don't require /var/crash to be specified, default to it
- determine and print the kernel name
- print all messages to syslog
diffstat:
sbin/savecore/savecore.c | 107 +++++++++++++++++++---------------------------
1 files changed, 45 insertions(+), 62 deletions(-)
diffs (290 lines):
diff -r 9b676fbeef06 -r 9e110ccd7b2b sbin/savecore/savecore.c
--- a/sbin/savecore/savecore.c Mon Sep 12 21:14:29 2011 +0000
+++ b/sbin/savecore/savecore.c Mon Sep 12 21:22:07 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: savecore.c,v 1.82 2011/08/29 14:30:38 joerg Exp $ */
+/* $NetBSD: savecore.c,v 1.83 2011/09/12 21:22:07 christos Exp $ */
/*-
* Copyright (c) 1986, 1992, 1993
@@ -39,7 +39,7 @@
#if 0
static char sccsid[] = "@(#)savecore.c 8.5 (Berkeley) 4/28/95";
#else
-__RCSID("$NetBSD: savecore.c,v 1.82 2011/08/29 14:30:38 joerg Exp $");
+__RCSID("$NetBSD: savecore.c,v 1.83 2011/09/12 21:22:07 christos Exp $");
#endif
#endif /* not lint */
@@ -68,6 +68,7 @@
#include <unistd.h>
#include <util.h>
#include <limits.h>
+#include <stdarg.h>
#include <kvm.h>
extern FILE *zopen(const char *fname, const char *mode);
@@ -141,7 +142,7 @@
static off_t dumpbytes; /* in bytes */
static const char *kernel; /* name of used kernel */
-static char *dirname; /* directory to save dumps in */
+static const char *dirname; /* directory to save dumps in */
static char *ddname; /* name of dump device */
static dev_t dumpdev; /* dump device */
static dev_t dumpcdev = NODEV; /* dump device (char equivalent) */
@@ -167,7 +168,7 @@
static int Open(const char *, int rw);
static char *rawname(char *s);
static void save_core(void);
-__dead static void usage(void);
+__dead static void usage(const char *fmt, ...) __printflike(1, 2);
int
main(int argc, char *argv[])
@@ -175,7 +176,6 @@
int ch, level, testonly;
char *ep;
- dirname = NULL;
kernel = NULL;
level = 1; /* default to fastest gzip compression */
testonly = 0;
@@ -206,25 +206,22 @@
break;
case 'Z':
level = (int)strtol(optarg, &ep, 10);
- if (level < 0 || level > 9) {
- (void)syslog(LOG_ERR, "invalid compression %s",
- optarg);
- usage();
- }
+ if (level < 0 || level > 9)
+ usage("Invalid compression `%s'", optarg);
break;
case '?':
default:
- usage();
+ usage("Unknown flag `%c'", ch);
}
argc -= optind;
argv += optind;
- if (argc != ((clear || testonly) ? 0 : 1))
- usage();
+ if (argc != 0)
+ dirname = argv[0];
+ else
+ dirname = "/var/crash";
gzmode[1] = level + '0';
- if (!clear)
- dirname = argv[0];
(void)time(&now);
kmem_setup();
@@ -297,8 +294,7 @@
}
if (KREAD(kd_kern, current_nl[X_DUMPDEV].n_value, &dumpdev) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
exit(1);
}
if (dumpdev == NODEV) {
@@ -309,8 +305,7 @@
long l_dumplo;
if (KREAD(kd_kern, current_nl[X_DUMPLO].n_value, &l_dumplo) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
exit(1);
}
if (l_dumplo == -1) {
@@ -324,8 +319,7 @@
(void)printf("dumplo = %lld (%ld * %ld)\n",
(long long)dumplo, (long)(dumplo / DEV_BSIZE), (long)DEV_BSIZE);
if (KREAD(kd_kern, current_nl[X_DUMPMAG].n_value, &dumpmag) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_kern));
exit(1);
}
@@ -336,9 +330,8 @@
if (current_nl[X_DUMPCDEV].n_value != 0) {
if (KREAD(kd_kern, current_nl[X_DUMPCDEV].n_value,
&dumpcdev) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s",
- kvm_geterr(kd_kern));
+ syslog(LOG_WARNING, "kvm_read: %s",
+ kvm_geterr(kd_kern));
exit(1);
}
ddname = find_dev(dumpcdev, S_IFCHR);
@@ -405,47 +398,40 @@
if (strcmp(vers, core_vers) != 0)
syslog(LOG_WARNING,
"warning: %s version mismatch:\n\t%s\nand\t%s\n",
- kernel, vers, core_vers);
+ kvm_getkernelname(kd_dump), vers, core_vers);
panicstart = panicend = 0;
if (KREAD(kd_dump, dump_nl[X_PANICSTART].n_value, &panicstart) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (KREAD(kd_dump, dump_nl[X_PANICEND].n_value, &panicend) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (panicstart != 0 && panicend != 0) {
if (KREAD(kd_dump, dump_nl[X_MSGBUF].n_value, &bufp)) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (kvm_read(kd_dump, (long)bufp, &msgbuf,
offsetof(struct kern_msgbuf, msg_bufc)) !=
offsetof(struct kern_msgbuf, msg_bufc)) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (msgbuf.msg_magic != MSG_MAGIC) {
- if (verbose)
- syslog(LOG_WARNING, "msgbuf magic incorrect");
+ syslog(LOG_WARNING, "msgbuf magic incorrect");
goto nomsguf;
}
bufdata = malloc(msgbuf.msg_bufs);
if (bufdata == NULL) {
- if (verbose)
- syslog(LOG_WARNING, "couldn't allocate space for msgbuf data");
+ syslog(LOG_WARNING, "couldn't allocate space for msgbuf data");
goto nomsguf;
}
if (kvm_read(kd_dump, (long)&bufp->msg_bufc, bufdata,
msgbuf.msg_bufs) != msgbuf.msg_bufs) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
free(bufdata);
goto nomsguf;
}
@@ -468,8 +454,7 @@
}
nomsguf:
if (KREAD(kd_dump, dump_nl[X_PANICSTR].n_value, &panicstr) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
return;
}
if (panicstr) {
@@ -477,9 +462,8 @@
panicloc = panicstr;
do {
if (KREAD(kd_dump, panicloc, cp) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s",
- kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s",
+ kvm_geterr(kd_dump));
break;
}
panicloc++;
@@ -494,15 +478,13 @@
u_int32_t newdumpmag;
if (KREAD(kd_dump, dump_nl[X_DUMPMAG].n_value, &newdumpmag) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
return (0);
}
/* Read the dump size. */
if (KREAD(kd_dump, dump_nl[X_DUMPSIZE].n_value, &dumpsize) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
return (0);
}
dumpbytes = (off_t)dumpsize * getpagesize();
@@ -514,9 +496,8 @@
*/
if (newdumpmag != dumpmag) {
if (verbose)
- syslog(LOG_WARNING,
- "magic number mismatch (0x%x != 0x%x)",
- newdumpmag, dumpmag);
+ syslog(LOG_WARNING, "magic number mismatch "
+ "(0x%x != 0x%x)", newdumpmag, dumpmag);
syslog(LOG_WARNING, "no core dump");
return (0);
}
@@ -565,9 +546,7 @@
{
if ((size_t)kvm_read(kd_dump, addr, ptr, size) != size) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s",
- kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
return 1;
}
return 0;
@@ -880,21 +859,20 @@
if (KREAD(kd_dump, dump_nl[X_TIME_SECOND].n_value, &dumptime) != 0) {
if (KREAD(kd_dump, dump_nl[X_TIME].n_value, &dtime) != 0) {
- if (verbose)
- syslog(LOG_WARNING, "kvm_read: %s (and _time_second is not defined also)", kvm_geterr(kd_dump));
+ syslog(LOG_WARNING, "kvm_read: %s (and _time_second "
+ "is not defined also)", kvm_geterr(kd_dump));
return (0);
}
dumptime = dtime.tv_sec;
}
if (dumptime == 0) {
- if (verbose)
- syslog(LOG_ERR, "dump time is zero");
+ syslog(LOG_WARNING, "dump time is zero");
return (0);
}
- (void)printf("savecore: system went down at %s", ctime(&dumptime));
+ syslog(LOG_INFO, "system went down at %s", ctime(&dumptime));
#define LEEWAY (60 * SECSPERDAY)
if (dumptime < now - LEEWAY || dumptime > now + LEEWAY) {
- (void)printf("dump time is unreasonable\n");
+ syslog(LOG_WARNING, "dump time is unreasonable");
return (0);
}
return (1);
@@ -981,9 +959,14 @@
}
static void
-usage(void)
+usage(const char *fmt, ...)
{
+ va_list ap;
+ va_start(ap, fmt);
+ (void)vsyslog(LOG_ERR, fmt, ap);
+ va_end(ap);
(void)syslog(LOG_ERR,
- "usage: savecore [-cfnvz] [-N system] [-Z level] directory");
+ "Usage: %s [-cfnvz] [-N system] [-Z level] [directory]",
+ getprogname());
exit(1);
}
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