diff options
Diffstat (limited to 'source/lib/fault.c')
| -rw-r--r-- | source/lib/fault.c | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/source/lib/fault.c b/source/lib/fault.c deleted file mode 100644 index 4a949320f0..0000000000 --- a/source/lib/fault.c +++ /dev/null @@ -1,248 +0,0 @@ -/* - Unix SMB/CIFS implementation. - Critical Fault handling - Copyright (C) Andrew Tridgell 1992-1998 - - 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_PRCTL_H -#include <sys/prctl.h> -#endif - -static void (*cont_fn)(void *); -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"); - - if (cont_fn) { - cont_fn(NULL); -#ifdef SIGSEGV - CatchSignal(SIGSEGV,SIGNAL_CAST SIG_DFL); -#endif -#ifdef SIGBUS - CatchSignal(SIGBUS,SIGNAL_CAST SIG_DFL); -#endif -#ifdef SIGABRT - CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL); -#endif - return; /* this should cause a core dump */ - } - exit(1); -} - -/**************************************************************************** -catch serious errors -****************************************************************************/ -static void sig_fault(int sig) -{ - fault_report(sig); -} - -/******************************************************************* -setup our fault handlers -********************************************************************/ -void fault_setup(void (*fn)(void *)) -{ - cont_fn = fn; - -#ifdef SIGSEGV - CatchSignal(SIGSEGV,SIGNAL_CAST sig_fault); -#endif -#ifdef SIGBUS - CatchSignal(SIGBUS,SIGNAL_CAST sig_fault); -#endif -#ifdef SIGABRT - CatchSignal(SIGABRT,SIGNAL_CAST sig_fault); -#endif -} - -/******************************************************************* -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 is 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); - - if (asprintf(&corepath, "%s/cores", logbase) < 0) { - SAFE_FREE(logbase); - return; - } - if (mkdir(corepath,0700) == -1) { - if (errno != EEXIST) { - SAFE_FREE(corepath); - SAFE_FREE(logbase); - return; - } - } - if (chmod(corepath,0700) == -1) { - SAFE_FREE(corepath); - SAFE_FREE(logbase); - return; - } - - SAFE_FREE(corepath); - if (asprintf(&corepath, "%s/cores/%s", - logbase, progname) < 0) { - SAFE_FREE(logbase); - return; - } - if (mkdir(corepath,0700) == -1) { - if (errno != EEXIST) { - SAFE_FREE(corepath); - SAFE_FREE(logbase); - return; - } - } - - if (sys_chown(corepath,getuid(),getgid()) == -1) { - SAFE_FREE(corepath); - SAFE_FREE(logbase); - return; - } - if (chmod(corepath,0700) == -1) { - SAFE_FREE(corepath); - SAFE_FREE(logbase); - return; - } - - SAFE_FREE(logbase); - -#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 - -#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 - - /* FIXME: if we have a core-plus-pid facility, configurably set - * this up here. - */ -} - - 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() != 0) { - 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(); - - /* Ensure we don't have a signal handler for abort. */ -#ifdef SIGABRT - CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL); -#endif - - abort(); - -#else /* DUMP_CORE */ - exit(1); -#endif /* DUMP_CORE */ -} - |