lib/fault.c

ソースコードを見る。

関数
static void	fault_report (int sig)
static void	sig_fault (int sig)
void	fault_setup (void(*fn)(void *))
void	dump_core_setup (const char *progname)
void	dump_core (void)
変数
static void(*)	cont_fn (void *)
static pstring	corepath

---

関数

static void fault_report

(

int

sig

)

[static]

fault.c の 33 行で定義されています。

参照先 CatchSignal()・cont_fn・counter・smb_panic()・sys_getpid().

参照元 sig_fault().

{
        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);
}

static void sig_fault

(

int

sig

)

[static]

fault.c の 68 行で定義されています。

参照先 fault_report().

参照元 fault_setup().

{
        fault_report(sig);
}

void fault_setup

(

void(*)(void *)

fn

)

fault.c の 76 行で定義されています。

参照先 CatchSignal()・cont_fn・sig_fault().

参照元 main()・parse_quota_set().

{
        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
}

void dump_core_setup

(

const char *

progname

)

fault.c の 95 行で定義されています。

参照先 corepath・dyn_LOGFILEBASE・snprintf()・strrchr_m()・sys_chown().

参照元 main().

{
        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

)

fault.c の 152 行で定義されています。

参照先 become_root()・CatchSignal()・corepath・dbgflush().

参照元 exit_server_common()・fault_continue()・fault_quit()・smb_panic().

{
        /* 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 != '\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 */
}

---

変数

void(*) cont_fn(void *) [static]

fault.c の 27 行で定義されています。

参照元 fault_report()・fault_setup().

pstring corepath [static]

fault.c の 28 行で定義されています。

参照元 dump_core()・dump_core_setup().

---