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authorAndrew Tridgell <tridge@samba.org>2011-03-23 10:25:01 +1100
committerAndrew Tridgell <tridge@samba.org>2011-03-23 11:03:57 +1100
commit058c3bb923c51ef3f1b4b6d698bea2b1220bdd10 (patch)
tree590ac35b3a936d413e2c9a4fdc792399b3f219b0 /source3/lib
parentcb2cc34effedca2af4e9f6d57303ccc779a9cc04 (diff)
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fault: moved s3 fault.c to top level
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/fault.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/source3/lib/fault.c b/source3/lib/fault.c
deleted file mode 100644
index 8bb202086e..0000000000
--- a/source3/lib/fault.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- Critical Fault handling
- Copyright (C) Andrew Tridgell 1992-1998
- Copyright (C) Tim Prouty 2009
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-
-#ifdef HAVE_SYS_SYSCTL_H
-#include <sys/sysctl.h>
-#endif
-
-
-#ifdef HAVE_SYS_PRCTL_H
-#include <sys/prctl.h>
-#endif
-
-static char *corepath;
-
-/*******************************************************************
-report a fault
-********************************************************************/
-static void fault_report(int sig)
-{
- static int counter;
-
- if (counter) _exit(1);
-
- counter++;
-
- DEBUGSEP(0);
- DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)sys_getpid(),samba_version_string()));
- DEBUG(0,("\nPlease read the Trouble-Shooting section of the Samba3-HOWTO\n"));
- DEBUG(0,("\nFrom: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf\n"));
- DEBUGSEP(0);
-
- smb_panic("internal error");
-
- /* smb_panic() never returns, so this is really redundent */
- exit(1);
-}
-
-/****************************************************************************
-catch serious errors
-****************************************************************************/
-static void sig_fault(int sig)
-{
- fault_report(sig);
-}
-
-/*******************************************************************
-setup our fault handlers
-********************************************************************/
-void fault_setup(void)
-{
-#ifdef SIGSEGV
- CatchSignal(SIGSEGV, sig_fault);
-#endif
-#ifdef SIGBUS
- CatchSignal(SIGBUS, sig_fault);
-#endif
-#ifdef SIGABRT
- CatchSignal(SIGABRT, sig_fault);
-#endif
-}
-
-/**
- * Build up the default corepath as "<logbase>/cores/<progname>"
- */
-static char *get_default_corepath(const char *logbase, const char *progname)
-{
- char *tmp_corepath;
-
- /* Setup core dir in logbase. */
- tmp_corepath = talloc_asprintf(NULL, "%s/cores", logbase);
- if (!tmp_corepath)
- return NULL;
-
- if ((mkdir(tmp_corepath, 0700) == -1) && errno != EEXIST)
- goto err_out;
-
- if (chmod(tmp_corepath, 0700) == -1)
- goto err_out;
-
- talloc_free(tmp_corepath);
-
- /* Setup progname-specific core subdir */
- tmp_corepath = talloc_asprintf(NULL, "%s/cores/%s", logbase, progname);
- if (!tmp_corepath)
- return NULL;
-
- if (mkdir(tmp_corepath, 0700) == -1 && errno != EEXIST)
- goto err_out;
-
- if (chown(tmp_corepath, getuid(), getgid()) == -1)
- goto err_out;
-
- if (chmod(tmp_corepath, 0700) == -1)
- goto err_out;
-
- return tmp_corepath;
-
- err_out:
- talloc_free(tmp_corepath);
- return NULL;
-}
-
-/**
- * Get the FreeBSD corepath.
- *
- * On FreeBSD the current working directory is ignored when creating a core
- * file. Instead the core directory is controlled via sysctl. This consults
- * the value of "kern.corefile" so the correct corepath can be printed out
- * before dump_core() calls abort.
- */
-#if (defined(FREEBSD) && defined(HAVE_SYSCTLBYNAME))
-static char *get_freebsd_corepath(void)
-{
- char *tmp_corepath = NULL;
- char *end = NULL;
- size_t len = 128;
- int ret;
-
- /* Loop with increasing sizes so we don't allocate too much. */
- do {
- if (len > 1024) {
- goto err_out;
- }
-
- tmp_corepath = (char *)talloc_realloc(NULL, tmp_corepath,
- char, len);
- if (!tmp_corepath) {
- return NULL;
- }
-
- ret = sysctlbyname("kern.corefile", tmp_corepath, &len, NULL,
- 0);
- if (ret == -1) {
- if (errno != ENOMEM) {
- DEBUG(0, ("sysctlbyname failed getting "
- "kern.corefile %s\n",
- strerror(errno)));
- goto err_out;
- }
-
- /* Not a large enough array, try a bigger one. */
- len = len << 1;
- }
- } while (ret == -1);
-
- /* Strip off the common filename expansion */
- if ((end = strrchr_m(tmp_corepath, '/'))) {
- *end = '\0';
- }
-
- return tmp_corepath;
-
- err_out:
- if (tmp_corepath) {
- talloc_free(tmp_corepath);
- }
- return NULL;
-}
-#endif
-
-#if defined(HAVE_SYS_KERNEL_PROC_CORE_PATTERN)
-
-/**
- * Get the Linux corepath.
- *
- * On Linux the contents of /proc/sys/kernel/core_pattern indicates the
- * location of the core path.
- */
-static char *get_linux_corepath(void)
-{
- char *end;
- int fd;
- char *result;
-
- fd = open("/proc/sys/kernel/core_pattern", O_RDONLY, 0);
- if (fd == -1) {
- return NULL;
- }
-
- result = afdgets(fd, NULL, 0);
- close(fd);
-
- if (result == NULL) {
- return NULL;
- }
-
- if (result[0] != '/') {
- /*
- * No absolute path, use the default (cwd)
- */
- TALLOC_FREE(result);
- return NULL;
- }
- /* Strip off the common filename expansion */
-
- end = strrchr_m(result, '/');
-
- if ((end != result) /* this would be the only / */
- && (end != NULL)) {
- *end = '\0';
- }
- return result;
-}
-#endif
-
-
-/**
- * Try getting system-specific corepath if one exists.
- *
- * If the system doesn't define a corepath, then the default is used.
- */
-static char *get_corepath(const char *logbase, const char *progname)
-{
-#if (defined(FREEBSD) && defined(HAVE_SYSCTLBYNAME))
- char *tmp_corepath = NULL;
- tmp_corepath = get_freebsd_corepath();
-
- /* If this has been set correctly, we're done. */
- if (tmp_corepath) {
- return tmp_corepath;
- }
-#endif
-
-#if defined(HAVE_SYS_KERNEL_PROC_CORE_PATTERN)
- char *tmp_corepath = NULL;
- tmp_corepath = get_linux_corepath();
-
- /* If this has been set correctly, we're done. */
- if (tmp_corepath) {
- return tmp_corepath;
- }
-#endif
-
- /* Fall back to the default. */
- return get_default_corepath(logbase, progname);
-}
-
-/*******************************************************************
-make all the preparations to safely dump a core file
-********************************************************************/
-
-void dump_core_setup(const char *progname)
-{
- char *logbase = NULL;
- char *end = NULL;
-
- if (lp_logfile() && *lp_logfile()) {
- if (asprintf(&logbase, "%s", lp_logfile()) < 0) {
- return;
- }
- if ((end = strrchr_m(logbase, '/'))) {
- *end = '\0';
- }
- } else {
- /* We will end up here if the log file is given on the command
- * line by the -l option but the "log file" option is not set
- * in smb.conf.
- */
- if (asprintf(&logbase, "%s", get_dyn_LOGFILEBASE()) < 0) {
- return;
- }
- }
-
- SMB_ASSERT(progname != NULL);
-
- corepath = get_corepath(logbase, progname);
- if (!corepath) {
- DEBUG(0, ("Unable to setup corepath for %s: %s\n", progname,
- strerror(errno)));
- goto out;
- }
-
-
-#ifdef HAVE_GETRLIMIT
-#ifdef RLIMIT_CORE
- {
- struct rlimit rlp;
- getrlimit(RLIMIT_CORE, &rlp);
- rlp.rlim_cur = MAX(16*1024*1024,rlp.rlim_cur);
- setrlimit(RLIMIT_CORE, &rlp);
- getrlimit(RLIMIT_CORE, &rlp);
- DEBUG(3,("Maximum core file size limits now %d(soft) %d(hard)\n",
- (int)rlp.rlim_cur,(int)rlp.rlim_max));
- }
-#endif
-#endif
-
- /* FIXME: if we have a core-plus-pid facility, configurably set
- * this up here.
- */
- out:
- SAFE_FREE(logbase);
-}
-
- void dump_core(void)
-{
- static bool called;
-
- if (called) {
- DEBUG(0, ("dump_core() called recursive\n"));
- exit(1);
- }
- called = true;
-
- /* Note that even if core dumping has been disabled, we still set up
- * the core path. This is to handle the case where core dumping is
- * turned on in smb.conf and the relevant daemon is not restarted.
- */
- if (!lp_enable_core_files()) {
- DEBUG(0, ("Exiting on internal error (core file administratively disabled)\n"));
- exit(1);
- }
-
-#if DUMP_CORE
- /* If we're running as non root we might not be able to dump the core
- * file to the corepath. There must not be an unbecome_root() before
- * we call abort(). */
- if (geteuid() != sec_initial_uid()) {
- become_root();
- }
-
- if (corepath == NULL) {
- DEBUG(0, ("Can not dump core: corepath not set up\n"));
- exit(1);
- }
-
- if (*corepath != '\0') {
- /* The chdir might fail if we dump core before we finish
- * processing the config file.
- */
- if (chdir(corepath) != 0) {
- DEBUG(0, ("unable to change to %s\n", corepath));
- DEBUGADD(0, ("refusing to dump core\n"));
- exit(1);
- }
-
- DEBUG(0,("dumping core in %s\n", corepath));
- }
-
- umask(~(0700));
- dbgflush();
-
-#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
- /* On Linux we lose the ability to dump core when we change our user
- * ID. We know how to dump core safely, so let's make sure we have our
- * dumpable flag set.
- */
- prctl(PR_SET_DUMPABLE, 1);
-#endif
-
- /* Ensure we don't have a signal handler for abort. */
-#ifdef SIGABRT
- CatchSignal(SIGABRT, SIG_DFL);
-#endif
-
- abort();
-
-#else /* DUMP_CORE */
- exit(1);
-#endif /* DUMP_CORE */
-}
-