*/
#include "includes.h"
+#include "system/filesys.h"
+#include "version.h"
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#include <sys/prctl.h>
#endif
-static char *corepath;
+static struct {
+ bool disabled;
+ smb_panic_handler_t panic_handler;
+} fault_state;
+
+
+/*******************************************************************
+setup variables used for fault handling
+********************************************************************/
+void fault_configure(smb_panic_handler_t panic_handler)
+{
+ fault_state.panic_handler = panic_handler;
+}
+
+
+/**
+ disable setting up fault handlers
+ This is used for the bind9 dlz module, as we
+ don't want a Samba module in bind9 to override the bind
+ fault handling
+**/
+_PUBLIC_ void fault_setup_disable(void)
+{
+ fault_state.disabled = true;
+}
+
/*******************************************************************
report a fault
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"));
+ 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 Samba HOWTO\n"));
DEBUGSEP(0);
smb_panic("internal error");
********************************************************************/
void fault_setup(void)
{
+ if (fault_state.disabled) {
+ return;
+ }
#ifdef SIGSEGV
CatchSignal(SIGSEGV, sig_fault);
#endif
#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;
+_PUBLIC_ const char *panic_action = NULL;
- 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)
+/*
+ default smb_panic() implementation
+*/
+static void smb_panic_default(const char *why)
{
- 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;
- }
+ int result;
+
+ if (panic_action && *panic_action) {
+ char pidstr[20];
+ char cmdstring[200];
+ safe_strcpy(cmdstring, panic_action, sizeof(cmdstring)-1);
+ snprintf(pidstr, sizeof(pidstr), "%d", (int) getpid());
+ all_string_sub(cmdstring, "%PID%", pidstr, sizeof(cmdstring));
+ DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmdstring));
+ result = system(cmdstring);
+
+ if (result == -1)
+ DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
+ strerror(errno)));
+ else
+ DEBUG(0, ("smb_panic(): action returned status %d\n",
+ WEXITSTATUS(result)));
+ }
+ DEBUG(0,("PANIC: %s\n", why));
- 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;
-}
+#ifdef SIGABRT
+ CatchSignal(SIGABRT, SIG_DFL);
#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;
+ abort();
}
-#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)
+ Something really nasty happened - panic !
+**/
+_PUBLIC_ void smb_panic(const char *why)
{
- 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));
+ if (fault_state.panic_handler) {
+ fault_state.panic_handler(why);
+ _exit(1);
}
-
- 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 */
+ smb_panic_default(why);
}
**/
_PUBLIC_ _NORETURN_ void smb_panic(const char *why);
-#if _SAMBA_BUILD_ == 4
-/**
-setup our fault handlers
-**/
-_PUBLIC_ void fault_setup(const char *pname);
+typedef void (*smb_panic_handler_t)(const char *why);
+
+_PUBLIC_ void fault_configure(smb_panic_handler_t panic_handler);
+_PUBLIC_ void fault_setup(void);
_PUBLIC_ void fault_setup_disable(void);
-#endif
+_PUBLIC_ void dump_core_setup(const char *progname, const char *logfile);
+_PUBLIC_ void smb_panic(const char *reason);
+
/**
register a fault handler.
lib/addrchange.o \
$(TDB_LIB_OBJ) \
$(VERSION_OBJ) lib/charcnv.o ../lib/util/debug.o ../lib/util/debug_s3.o ../lib/util/fault.o \
- lib/interface.o lib/pidfile.o \
+ lib/interface.o lib/pidfile.o lib/dumpcore.o \
lib/system.o lib/sendfile.o lib/recvfile.o lib/time.o \
lib/username.o \
../libds/common/flag_mapping.o \
NTSTATUS map_nt_error_from_unix(int unix_error);
int map_errno_from_nt_status(NTSTATUS status);
-/* The following definitions come from lib/fault.c */
-void fault_setup(void);
-void dump_core_setup(const char *progname);
-
/* The following definitions come from lib/file_id.c */
struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf);
char *gidtoname(gid_t gid);
uid_t nametouid(const char *name);
gid_t nametogid(const char *name);
-void smb_panic(const char *const why);
+void smb_panic_s3(const char *why);
void log_stack_trace(void);
const char *readdirname(SMB_STRUCT_DIR *p);
bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive);
--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+
+ Copyright (C) Andrew Tridgell 1992-2011
+
+ based on old fault.c code, which had:
+
+ Copyright (C) Jeremy Allison 2001-2007
+ Copyright (C) Simo Sorce 2001
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+ Copyright (C) James Peach 2006
+
+ 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"
+
+static char *corepath;
+
+/**
+ * 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, const char *logfile)
+{
+ char *logbase = NULL;
+ char *end = NULL;
+
+ if (logfile && *logfile) {
+ if (asprintf(&logbase, "%s", 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 */
+}
Something really nasty happened - panic !
********************************************************************/
-void smb_panic(const char *const why)
+void smb_panic_s3(const char *why)
{
char *cmd;
int result;
}
fault_setup();
- dump_core_setup("nmbd");
+ dump_core_setup("nmbd", lp_logfile());
/* POSIX demands that signals are inherited. If the invoking process has
* these signals masked, we will have problems, as we won't receive them. */
init_iconv();
+ fault_configure(smb_panic_s3);
+
bAllowIncludeRegistry = true;
return (bRetval);
gain_root_group_privilege();
fault_setup();
- dump_core_setup("smbd");
+ dump_core_setup("smbd", lp_logfile());
/* we are never interested in SIGPIPE */
BlockSignals(True,SIGPIPE);
CatchSignal(SIGUSR2, SIG_IGN);
fault_setup();
- dump_core_setup("winbindd");
+ dump_core_setup("winbindd", lp_logfile());
load_case_tables();
lib/util_transfer_file.c
lib/addrchange.c
${TDB_LIB_SRC}
- ../lib/util/debug_s3.c ../lib/util/fault.c
+ ../lib/util/debug_s3.c
+ lib/dumpcore.c
lib/interface.c lib/pidfile.c
lib/system.c lib/sendfile.c lib/recvfile.c lib/time.c
lib/username.c
git.samba.org / samba.git / commitdiff