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main: install crash handler for creating core dumps

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This commit is contained in:
Lennart Poettering 2010-04-10 21:40:40 +02:00
parent dec1c02a34
commit 97c4f35cd5
1 changed files with 64 additions and 0 deletions
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64
main.c
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@ -28,6 +28,7 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <signal.h>
#include "manager.h"
#include "log.h"
@ -44,6 +45,66 @@ static enum {
static char *default_unit = NULL;
static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
static bool dump_core = true;
_noreturn static void freeze(void) {
for (;;)
pause();
}
_noreturn static void crash(int sig) {
if (!dump_core)
log_error("Caught <%s>, not dumping core.", strsignal(sig));
else {
pid_t pid;
log_warning("Caugh <%s>, dumping core.", strsignal(sig));
if ((pid = fork()) < 0)
log_error("Caught <%s>, cannot dump core: %s", strsignal(sig), strerror(errno));
else if (pid == 0) {
struct sigaction sa;
struct rlimit rl;
/* Enable default signal handler for core dump */
zero(sa);
sa.sa_handler = SIG_DFL;
assert_se(sigaction(sig, &sa, NULL) == 0);
/* Don't limit the core dump size */
zero(rl);
rl.rlim_cur = RLIM_INFINITY;
rl.rlim_max = RLIM_INFINITY;
setrlimit(RLIMIT_CORE, &rl);
/* Just to be sure... */
assert_se(chdir("/") == 0);
/* Raise the signal again */
raise(sig);
assert_not_reached("We shouldn't be here...");
_exit(1);
}
}
log_error("Freezing execution.");
freeze();
}
static void install_crash_handler(void) {
struct sigaction sa;
zero(sa);
sa.sa_handler = crash;
sa.sa_flags = SA_NODEFER;
assert_se(sigaction(SIGSEGV, &sa, NULL) == 0);
assert_se(sigaction(SIGABRT, &sa, NULL) == 0);
}
static int set_default_unit(const char *u) {
char *c;
@ -307,6 +368,9 @@ int main(int argc, char *argv[]) {
log_open_syslog();
log_open_kmsg();
install_crash_handler();
assert(!"esel");
log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));
if (running_as == MANAGER_INIT)