diff options
Diffstat (limited to 'source3/lib/fault.c')
| -rw-r--r-- | source3/lib/fault.c | 97 |
1 files changed, 95 insertions, 2 deletions
diff --git a/source3/lib/fault.c b/source3/lib/fault.c index 3cb6684639..8ae45f2435 100644 --- a/source3/lib/fault.c +++ b/source3/lib/fault.c @@ -20,7 +20,12 @@ #include "includes.h" +#ifdef HAVE_SYS_PRCTL_H +#include <sys/prctl.h> +#endif + static void (*cont_fn)(void *); +static pstring corepath; /******************************************************************* report a fault @@ -33,11 +38,11 @@ static void fault_report(int sig) counter++; - DEBUG(0,("===============================================================\n")); + 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,("===============================================================\n")); + DEBUGSEP(0); smb_panic("internal error"); @@ -82,3 +87,91 @@ void fault_setup(void (*fn)(void *)) CatchSignal(SIGABRT,SIGNAL_CAST sig_fault); #endif } + +/******************************************************************* +make all the preparations to safely dump a core file +********************************************************************/ + +void dump_core_setup(const char *progname) +{ + pstring logbase; + char * end; + + if (lp_logfile() && *lp_logfile()) { + snprintf(logbase, sizeof(logbase), "%s", lp_logfile()); + 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. + */ + snprintf(logbase, sizeof(logbase), "%s", dyn_LOGFILEBASE); + } + + SMB_ASSERT(progname != NULL); + + snprintf(corepath, sizeof(corepath), "%s/cores", logbase); + mkdir(corepath,0700); + + snprintf(corepath, sizeof(corepath), "%s/cores/%s", + logbase, progname); + mkdir(corepath,0700); + + sys_chown(corepath,getuid(),getgid()); + chmod(corepath,0700); + +#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) +{ + 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", 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(); +} + |