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Diffstat (limited to 'sbin/savecore/savecore_old.c')
-rw-r--r--sbin/savecore/savecore_old.c662
1 files changed, 662 insertions, 0 deletions
diff --git a/sbin/savecore/savecore_old.c b/sbin/savecore/savecore_old.c
new file mode 100644
index 00000000000..9de2a14ad52
--- /dev/null
+++ b/sbin/savecore/savecore_old.c
@@ -0,0 +1,662 @@
+/* $NetBSD: savecore_old.c,v 1.1.1.1 1996/03/16 10:25:11 leo Exp $ */
+
+/*-
+ * Copyright (c) 1986, 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1986, 1992, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)savecore.c 8.3 (Berkeley) 1/2/94";
+#else
+static char rcsid[] = "$NetBSD: savecore_old.c,v 1.1.1.1 1996/03/16 10:25:11 leo Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <sys/syslog.h>
+#include <sys/time.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <nlist.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tzfile.h>
+#include <unistd.h>
+
+extern FILE *zopen __P((const char *fname, const char *mode, int bits));
+
+#define ok(number) ((number) - KERNBASE)
+
+struct nlist current_nl[] = { /* Namelist for currently running system. */
+#define X_DUMPDEV 0
+ { "_dumpdev" },
+#define X_DUMPLO 1
+ { "_dumplo" },
+#define X_TIME 2
+ { "_time" },
+#define X_DUMPSIZE 3
+ { "_dumpsize" },
+#define X_VERSION 4
+ { "_version" },
+#define X_PANICSTR 5
+ { "_panicstr" },
+#define X_DUMPMAG 6
+ { "_dumpmag" },
+ { "" },
+};
+int cursyms[] = { X_DUMPDEV, X_DUMPLO, X_VERSION, X_DUMPMAG, -1 };
+int dumpsyms[] = { X_TIME, X_DUMPSIZE, X_VERSION, X_PANICSTR, X_DUMPMAG, -1 };
+
+struct nlist dump_nl[] = { /* Name list for dumped system. */
+ { "_dumpdev" }, /* Entries MUST be the same as */
+ { "_dumplo" }, /* those in current_nl[]. */
+ { "_time" },
+ { "_dumpsize" },
+ { "_version" },
+ { "_panicstr" },
+ { "_dumpmag" },
+ { "" },
+};
+
+/* Types match kernel declarations. */
+long dumplo; /* where dump starts on dumpdev */
+int dumpmag; /* magic number in dump */
+int dumpsize; /* amount of memory dumped */
+
+char *kernel;
+char *dirname; /* directory to save dumps in */
+char *ddname; /* name of dump device */
+dev_t dumpdev; /* dump device */
+int dumpfd; /* read/write descriptor on block dev */
+time_t now; /* current date */
+char panic_mesg[1024];
+int panicstr;
+char vers[1024];
+
+int clear, compress, force, verbose; /* flags */
+
+void check_kmem __P((void));
+int check_space __P((void));
+void clear_dump __P((void));
+int Create __P((char *, int));
+int dump_exists __P((void));
+char *find_dev __P((dev_t, int));
+int get_crashtime __P((void));
+void kmem_setup __P((void));
+void log __P((int, char *, ...));
+void Lseek __P((int, off_t, int));
+int Open __P((char *, int rw));
+int Read __P((int, void *, int));
+char *rawname __P((char *s));
+void save_core __P((void));
+void usage __P((void));
+void Write __P((int, void *, int));
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ int ch;
+
+ openlog("savecore", LOG_PERROR, LOG_DAEMON);
+
+ while ((ch = getopt(argc, argv, "cdfN:vz")) != -1)
+ switch(ch) {
+ case 'c':
+ clear = 1;
+ break;
+ case 'd': /* Not documented. */
+ case 'v':
+ verbose = 1;
+ break;
+ case 'f':
+ force = 1;
+ break;
+ case 'N':
+ kernel = optarg;
+ break;
+ case 'z':
+ compress = 1;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (!clear) {
+ if (argc != 1 && argc != 2)
+ usage();
+ dirname = argv[0];
+ }
+ if (argc == 2)
+ kernel = argv[1];
+
+ (void)time(&now);
+ kmem_setup();
+
+ if (clear) {
+ clear_dump();
+ exit(0);
+ }
+
+ if (!dump_exists() && !force)
+ exit(1);
+
+ check_kmem();
+
+ if (panicstr)
+ syslog(LOG_ALERT, "reboot after panic: %s", panic_mesg);
+ else
+ syslog(LOG_ALERT, "reboot");
+
+ if ((!get_crashtime() || !check_space()) && !force)
+ exit(1);
+
+ save_core();
+
+ clear_dump();
+ exit(0);
+}
+
+void
+kmem_setup()
+{
+ FILE *fp;
+ int kmem, i;
+ char *dump_sys;
+
+ /*
+ * Some names we need for the currently running system, others for
+ * the system that was running when the dump was made. The values
+ * obtained from the current system are used to look for things in
+ * /dev/kmem that cannot be found in the dump_sys namelist, but are
+ * presumed to be the same (since the disk partitions are probably
+ * the same!)
+ */
+ if ((nlist(_PATH_UNIX, current_nl)) == -1)
+ syslog(LOG_ERR, "%s: nlist: %s", _PATH_UNIX, strerror(errno));
+ for (i = 0; cursyms[i] != -1; i++)
+ if (current_nl[cursyms[i]].n_value == 0) {
+ syslog(LOG_ERR, "%s: %s not in namelist",
+ _PATH_UNIX, current_nl[cursyms[i]].n_name);
+ exit(1);
+ }
+
+ dump_sys = kernel ? kernel : _PATH_UNIX;
+ if ((nlist(dump_sys, dump_nl)) == -1)
+ syslog(LOG_ERR, "%s: nlist: %s", dump_sys, strerror(errno));
+ for (i = 0; dumpsyms[i] != -1; i++)
+ if (dump_nl[dumpsyms[i]].n_value == 0) {
+ syslog(LOG_ERR, "%s: %s not in namelist",
+ dump_sys, dump_nl[dumpsyms[i]].n_name);
+ exit(1);
+ }
+
+ kmem = Open(_PATH_KMEM, O_RDONLY);
+ Lseek(kmem, (off_t)current_nl[X_DUMPDEV].n_value, L_SET);
+ (void)Read(kmem, &dumpdev, sizeof(dumpdev));
+ if (dumpdev == NODEV) {
+ syslog(LOG_WARNING, "no core dump (no dumpdev)");
+ exit(1);
+ }
+ Lseek(kmem, (off_t)current_nl[X_DUMPLO].n_value, L_SET);
+ (void)Read(kmem, &dumplo, sizeof(dumplo));
+ dumplo *= DEV_BSIZE;
+ if (verbose)
+ (void)printf("dumplo = %d (%d * %d)\n",
+ dumplo, dumplo / DEV_BSIZE, DEV_BSIZE);
+ Lseek(kmem, (off_t)current_nl[X_DUMPMAG].n_value, L_SET);
+ (void)Read(kmem, &dumpmag, sizeof(dumpmag));
+ ddname = find_dev(dumpdev, S_IFBLK);
+ dumpfd = Open(ddname, O_RDWR);
+ fp = fdopen(kmem, "r");
+ if (fp == NULL) {
+ syslog(LOG_ERR, "%s: fdopen: %m", _PATH_KMEM);
+ exit(1);
+ }
+ if (kernel)
+ return;
+ (void)fseek(fp, (off_t)current_nl[X_VERSION].n_value, L_SET);
+ (void)fgets(vers, sizeof(vers), fp);
+
+ /* Don't fclose(fp), we use dumpfd later. */
+}
+
+void
+check_kmem()
+{
+ register char *cp;
+ FILE *fp;
+ char core_vers[1024];
+
+ fp = fdopen(dumpfd, "r");
+ if (fp == NULL) {
+ syslog(LOG_ERR, "%s: fdopen: %m", ddname);
+ exit(1);
+ }
+ fseek(fp, (off_t)(dumplo + ok(dump_nl[X_VERSION].n_value)), L_SET);
+ fgets(core_vers, sizeof(core_vers), fp);
+ if (strcmp(vers, core_vers) && kernel == 0)
+ syslog(LOG_WARNING,
+ "warning: %s version mismatch:\n\t%s\nand\t%s\n",
+ _PATH_UNIX, vers, core_vers);
+ (void)fseek(fp,
+ (off_t)(dumplo + ok(dump_nl[X_PANICSTR].n_value)), L_SET);
+ (void)fread(&panicstr, sizeof(panicstr), 1, fp);
+ if (panicstr) {
+ (void)fseek(fp, dumplo + ok(panicstr), L_SET);
+ cp = panic_mesg;
+ do
+ *cp = getc(fp);
+ while (*cp++ && cp < &panic_mesg[sizeof(panic_mesg)]);
+ }
+ /* Don't fclose(fp), we use dumpfd later. */
+}
+
+void
+clear_dump()
+{
+ long newdumplo;
+
+ newdumplo = 0;
+ Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET);
+ Write(dumpfd, &newdumplo, sizeof(newdumplo));
+}
+
+int
+dump_exists()
+{
+ int newdumpmag;
+
+ Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET);
+ (void)Read(dumpfd, &newdumpmag, sizeof(newdumpmag));
+
+ /* Read the dump size. */
+ Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPSIZE].n_value)), L_SET);
+ (void)Read(dumpfd, &dumpsize, sizeof(dumpsize));
+ dumpsize *= getpagesize();
+
+ /*
+ * Return zero if core dump doesn't seem to be there, and note
+ * it for syslog. This check and return happens after the dump size
+ * is read, so dumpsize is whether or not the core is valid (for -f).
+ */
+ if (newdumpmag != dumpmag) {
+ if (verbose)
+ syslog(LOG_WARNING, "magic number mismatch (%x != %x)",
+ newdumpmag, dumpmag);
+ syslog(LOG_WARNING, "no core dump");
+ return (0);
+ }
+ return (1);
+}
+
+char buf[1024 * 1024];
+
+void
+save_core()
+{
+ register FILE *fp;
+ register int bounds, ifd, nr, nw, ofd;
+ char *rawp, path[MAXPATHLEN];
+
+ /*
+ * Get the current number and update the bounds file. Do the update
+ * now, because may fail later and don't want to overwrite anything.
+ */
+ (void)snprintf(path, sizeof(path), "%s/bounds", dirname);
+ if ((fp = fopen(path, "r")) == NULL)
+ goto err1;
+ if (fgets(buf, sizeof(buf), fp) == NULL) {
+ if (ferror(fp))
+err1: syslog(LOG_WARNING, "%s: %s", path, strerror(errno));
+ bounds = 0;
+ } else
+ bounds = atoi(buf);
+ if (fp != NULL)
+ (void)fclose(fp);
+ if ((fp = fopen(path, "w")) == NULL)
+ syslog(LOG_ERR, "%s: %m", path);
+ else {
+ (void)fprintf(fp, "%d\n", bounds + 1);
+ (void)fclose(fp);
+ }
+ (void)fclose(fp);
+
+ /* Create the core file. */
+ (void)snprintf(path, sizeof(path), "%s/netbsd.%d.core%s",
+ dirname, bounds, compress ? ".Z" : "");
+ if (compress) {
+ if ((fp = zopen(path, "w", 0)) == NULL) {
+ syslog(LOG_ERR, "%s: %s", path, strerror(errno));
+ exit(1);
+ }
+ } else
+ ofd = Create(path, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+
+ /* Open the raw device. */
+ rawp = rawname(ddname);
+ if ((ifd = open(rawp, O_RDONLY)) == -1) {
+ syslog(LOG_WARNING, "%s: %m; using block device", rawp);
+ ifd = dumpfd;
+ }
+
+ /* Seek to the start of the core. */
+ Lseek(ifd, (off_t)dumplo, L_SET);
+
+ /* Copy the core file. */
+ syslog(LOG_NOTICE, "writing %score to %s",
+ compress ? "compressed " : "", path);
+ for (; dumpsize > 0; dumpsize -= nr) {
+ (void)printf("%6dK\r", dumpsize / 1024);
+ (void)fflush(stdout);
+ nr = read(ifd, buf, MIN(dumpsize, sizeof(buf)));
+ if (nr <= 0) {
+ if (nr == 0)
+ syslog(LOG_WARNING,
+ "WARNING: EOF on dump device");
+ else
+ syslog(LOG_ERR, "%s: %m", rawp);
+ goto err2;
+ }
+ if (compress)
+ nw = fwrite(buf, 1, nr, fp);
+ else
+ nw = write(ofd, buf, nr);
+ if (nw != nr) {
+ syslog(LOG_ERR, "%s: %s",
+ path, strerror(nw == 0 ? EIO : errno));
+err2: syslog(LOG_WARNING,
+ "WARNING: core may be incomplete");
+ (void)printf("\n");
+ exit(1);
+ }
+ }
+ (void)close(ifd);
+ if (compress)
+ (void)fclose(fp);
+ else
+ (void)close(ofd);
+
+ /* Copy the kernel. */
+ ifd = Open(kernel ? kernel : _PATH_UNIX, O_RDONLY);
+ (void)snprintf(path, sizeof(path), "%s/netbsd.%d%s",
+ dirname, bounds, compress ? ".Z" : "");
+ if (compress) {
+ if ((fp = zopen(path, "w", 0)) == NULL) {
+ syslog(LOG_ERR, "%s: %s", path, strerror(errno));
+ exit(1);
+ }
+ } else
+ ofd = Create(path, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+ syslog(LOG_NOTICE, "writing %skernel to %s",
+ compress ? "compressed " : "", path);
+ while ((nr = read(ifd, buf, sizeof(buf))) > 0) {
+ if (compress)
+ nw = fwrite(buf, 1, nr, fp);
+ else
+ nw = write(ofd, buf, nr);
+ if (nw != nr) {
+ syslog(LOG_ERR, "%s: %s",
+ path, strerror(nw == 0 ? EIO : errno));
+ syslog(LOG_WARNING,
+ "WARNING: kernel may be incomplete");
+ exit(1);
+ }
+ }
+ if (nr < 0) {
+ syslog(LOG_ERR, "%s: %s",
+ kernel ? kernel : _PATH_UNIX, strerror(errno));
+ syslog(LOG_WARNING,
+ "WARNING: kernel may be incomplete");
+ exit(1);
+ }
+ if (compress)
+ (void)fclose(fp);
+ else
+ (void)close(ofd);
+}
+
+char *
+find_dev(dev, type)
+ register dev_t dev;
+ register int type;
+{
+ register DIR *dfd;
+ struct dirent *dir;
+ struct stat sb;
+ char *dp, devname[MAXPATHLEN + 1];
+
+ if ((dfd = opendir(_PATH_DEV)) == NULL) {
+ syslog(LOG_ERR, "%s: %s", _PATH_DEV, strerror(errno));
+ exit(1);
+ }
+ (void)strcpy(devname, _PATH_DEV);
+ while ((dir = readdir(dfd))) {
+ (void)strcpy(devname + sizeof(_PATH_DEV) - 1, dir->d_name);
+ if (lstat(devname, &sb)) {
+ syslog(LOG_ERR, "%s: %s", devname, strerror(errno));
+ continue;
+ }
+ if ((sb.st_mode & S_IFMT) != type)
+ continue;
+ if (dev == sb.st_rdev) {
+ closedir(dfd);
+ if ((dp = strdup(devname)) == NULL) {
+ syslog(LOG_ERR, "%s", strerror(errno));
+ exit(1);
+ }
+ return (dp);
+ }
+ }
+ closedir(dfd);
+ syslog(LOG_ERR, "can't find device %d/%d", major(dev), minor(dev));
+ exit(1);
+}
+
+char *
+rawname(s)
+ char *s;
+{
+ char *sl, name[MAXPATHLEN];
+
+ if ((sl = strrchr(s, '/')) == NULL || sl[1] == '0') {
+ syslog(LOG_ERR,
+ "can't make raw dump device name from %s", s);
+ return (s);
+ }
+ (void)snprintf(name, sizeof(name), "%.*s/r%s", sl - s, s, sl + 1);
+ if ((sl = strdup(name)) == NULL) {
+ syslog(LOG_ERR, "%s", strerror(errno));
+ exit(1);
+ }
+ return (sl);
+}
+
+int
+get_crashtime()
+{
+ time_t dumptime; /* Time the dump was taken. */
+
+ Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_TIME].n_value)), L_SET);
+ (void)Read(dumpfd, &dumptime, sizeof(dumptime));
+ if (dumptime == 0) {
+ if (verbose)
+ syslog(LOG_ERR, "dump time is zero");
+ return (0);
+ }
+ (void)printf("savecore: system went down at %s", ctime(&dumptime));
+#define LEEWAY (7 * SECSPERDAY)
+ if (dumptime < now - LEEWAY || dumptime > now + LEEWAY) {
+ (void)printf("dump time is unreasonable\n");
+ return (0);
+ }
+ return (1);
+}
+
+int
+check_space()
+{
+ register FILE *fp;
+ char *tkernel;
+ off_t minfree, spacefree, kernelsize, needed;
+ struct stat st;
+ struct statfs fsbuf;
+ char buf[100], path[MAXPATHLEN];
+
+ tkernel = kernel ? kernel : _PATH_UNIX;
+ if (stat(tkernel, &st) < 0) {
+ syslog(LOG_ERR, "%s: %m", tkernel);
+ exit(1);
+ }
+ kernelsize = st.st_blocks * S_BLKSIZE;
+ if (statfs(dirname, &fsbuf) < 0) {
+ syslog(LOG_ERR, "%s: %m", dirname);
+ exit(1);
+ }
+ spacefree = (fsbuf.f_bavail * fsbuf.f_bsize) / 1024;
+
+ (void)snprintf(path, sizeof(path), "%s/minfree", dirname);
+ if ((fp = fopen(path, "r")) == NULL)
+ minfree = 0;
+ else {
+ if (fgets(buf, sizeof(buf), fp) == NULL)
+ minfree = 0;
+ else
+ minfree = atoi(buf);
+ (void)fclose(fp);
+ }
+
+ needed = (dumpsize + kernelsize) / 1024;
+ if (minfree > 0 && spacefree - needed < minfree) {
+ syslog(LOG_WARNING,
+ "no dump, not enough free space on device");
+ return (0);
+ }
+ if (spacefree - needed < minfree)
+ syslog(LOG_WARNING,
+ "dump performed, but free space threshold crossed");
+ return (1);
+}
+
+int
+Open(name, rw)
+ char *name;
+ int rw;
+{
+ int fd;
+
+ if ((fd = open(name, rw, 0)) < 0) {
+ syslog(LOG_ERR, "%s: %m", name);
+ exit(1);
+ }
+ return (fd);
+}
+
+int
+Read(fd, bp, size)
+ int fd, size;
+ void *bp;
+{
+ int nr;
+
+ nr = read(fd, bp, size);
+ if (nr != size) {
+ syslog(LOG_ERR, "read: %m");
+ exit(1);
+ }
+ return (nr);
+}
+
+void
+Lseek(fd, off, flag)
+ int fd, flag;
+ off_t off;
+{
+ off_t ret;
+
+ ret = lseek(fd, off, flag);
+ if (ret == -1) {
+ syslog(LOG_ERR, "lseek: %m");
+ exit(1);
+ }
+}
+
+int
+Create(file, mode)
+ char *file;
+ int mode;
+{
+ register int fd;
+
+ fd = open(file, O_WRONLY | O_CREAT | O_TRUNC, mode);
+ if (fd < 0) {
+ syslog(LOG_ERR, "%s: %m", file);
+ exit(1);
+ }
+ return (fd);
+}
+
+void
+Write(fd, bp, size)
+ int fd, size;
+ void *bp;
+{
+ int n;
+
+ if ((n = write(fd, bp, size)) < size) {
+ syslog(LOG_ERR, "write: %s", strerror(n == -1 ? errno : EIO));
+ exit(1);
+ }
+}
+
+void
+usage()
+{
+ (void)syslog(LOG_ERR, "usage: savecore [-cfvz] [-N system] directory");
+ exit(1);
+}
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