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
#include "includes.h"
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
+
+
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
counter++;
DEBUGSEP(0);
- DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)sys_getpid(),SAMBA_VERSION_STRING));
+ 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);
#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
+
+/**
+ * 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))
+
+ /* @todo: Add support for the linux corepath. */
+
+ 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
+
+ /* Fall back to the default. */
+ return get_default_corepath(logbase, progname);
+}
+
/*******************************************************************
make all the preparations to safely dump a core file
********************************************************************/
*end = '\0';
}
} else {
- /* We will end up here is the log file is given on the command
+ /* 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.
*/
SMB_ASSERT(progname != NULL);
- if (asprintf(&corepath, "%s/cores", logbase) < 0) {
- SAFE_FREE(logbase);
- return;
- }
- mkdir(corepath,0700);
-
- SAFE_FREE(corepath);
- if (asprintf(&corepath, "%s/cores/%s",
- logbase, progname) < 0) {
- SAFE_FREE(logbase);
- return;
+ corepath = get_corepath(logbase, progname);
+ if (!corepath) {
+ DEBUG(0, ("Unable to setup corepath for %s: %s\n", progname,
+ strerror(errno)));
+ goto out;
}
- mkdir(corepath,0700);
- sys_chown(corepath,getuid(),getgid());
- chmod(corepath,0700);
-
- SAFE_FREE(logbase);
#ifdef HAVE_GETRLIMIT
#ifdef RLIMIT_CORE
/* FIXME: if we have a core-plus-pid facility, configurably set
* this up here.
*/
+ out:
+ SAFE_FREE(logbase);
}
void dump_core(void)
/* 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() != 0) {
+ 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.
git.samba.org / samba.git / blobdiff