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-rw-r--r--source3/Makefile.in2
-rw-r--r--source3/include/proto.h6
-rw-r--r--source3/lib/dumpcore.c332
-rw-r--r--source3/lib/util.c2
-rw-r--r--source3/nmbd/nmbd.c2
-rw-r--r--source3/param/loadparm.c2
-rw-r--r--source3/smbd/server.c2
-rw-r--r--source3/winbindd/winbindd.c2
-rwxr-xr-xsource3/wscript_build3
9 files changed, 342 insertions, 11 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in
index 7ba8332eb0..065f0cbad7 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -443,7 +443,7 @@ LIB_OBJ = $(LIBSAMBAUTIL_OBJ) $(UTIL_OBJ) $(CRYPTO_OBJ) \
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 \
diff --git a/source3/include/proto.h b/source3/include/proto.h
index b5b35a4623..bb9241c893 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -515,10 +515,6 @@ void display_set_stderr(void);
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);
@@ -1095,7 +1091,7 @@ const char *uidtoname(uid_t uid);
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);
diff --git a/source3/lib/dumpcore.c b/source3/lib/dumpcore.c
new file mode 100644
index 0000000000..8a1c43a72f
--- /dev/null
+++ b/source3/lib/dumpcore.c
@@ -0,0 +1,332 @@
+/*
+ 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 */
+}
diff --git a/source3/lib/util.c b/source3/lib/util.c
index b6128feaf6..79b10fda5e 100644
--- a/source3/lib/util.c
+++ b/source3/lib/util.c
@@ -1344,7 +1344,7 @@ gid_t nametogid(const char *name)
Something really nasty happened - panic !
********************************************************************/
-void smb_panic(const char *const why)
+void smb_panic_s3(const char *why)
{
char *cmd;
int result;
diff --git a/source3/nmbd/nmbd.c b/source3/nmbd/nmbd.c
index 1735c90576..2aa896476f 100644
--- a/source3/nmbd/nmbd.c
+++ b/source3/nmbd/nmbd.c
@@ -812,7 +812,7 @@ static bool open_sockets(bool isdaemon, int port)
}
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. */
diff --git a/source3/param/loadparm.c b/source3/param/loadparm.c
index a82d21cdb1..ba3cd3c6c5 100644
--- a/source3/param/loadparm.c
+++ b/source3/param/loadparm.c
@@ -9541,6 +9541,8 @@ static bool lp_load_ex(const char *pszFname,
init_iconv();
+ fault_configure(smb_panic_s3);
+
bAllowIncludeRegistry = true;
return (bRetval);
diff --git a/source3/smbd/server.c b/source3/smbd/server.c
index 2c09dd26c5..37c97049b8 100644
--- a/source3/smbd/server.c
+++ b/source3/smbd/server.c
@@ -987,7 +987,7 @@ extern void build_options(bool screen);
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);
diff --git a/source3/winbindd/winbindd.c b/source3/winbindd/winbindd.c
index 99e98ac2b0..47d8be6178 100644
--- a/source3/winbindd/winbindd.c
+++ b/source3/winbindd/winbindd.c
@@ -1230,7 +1230,7 @@ int main(int argc, char **argv, char **envp)
CatchSignal(SIGUSR2, SIG_IGN);
fault_setup();
- dump_core_setup("winbindd");
+ dump_core_setup("winbindd", lp_logfile());
load_case_tables();
diff --git a/source3/wscript_build b/source3/wscript_build
index fd9e4f488b..cb3bbc29be 100755
--- a/source3/wscript_build
+++ b/source3/wscript_build
@@ -69,7 +69,8 @@ LIB_SRC = '''
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
generated by cgit (git 2.34.1) at 2024-11-03 06:49:19 +0000