common-main.c 1.28 KB
Newer Older
1
#include "cache.h"
2
#include "exec-cmd.h"
3
#include "attr.h"
4

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
/*
 * Many parts of Git have subprograms communicate via pipe, expect the
 * upstream of a pipe to die with SIGPIPE when the downstream of a
 * pipe does not need to read all that is written.  Some third-party
 * programs that ignore or block SIGPIPE for their own reason forget
 * to restore SIGPIPE handling to the default before spawning Git and
 * break this carefully orchestrated machinery.
 *
 * Restore the way SIGPIPE is handled to default, which is what we
 * expect.
 */
static void restore_sigpipe_to_default(void)
{
	sigset_t unblock;

	sigemptyset(&unblock);
	sigaddset(&unblock, SIGPIPE);
	sigprocmask(SIG_UNBLOCK, &unblock, NULL);
	signal(SIGPIPE, SIG_DFL);
}

26
int main(int argc, const char **argv)
27
{
28 29
	int result;

30 31 32 33 34 35
	/*
	 * Always open file descriptors 0/1/2 to avoid clobbering files
	 * in die().  It also avoids messing up when the pipes are dup'ed
	 * onto stdin/stdout/stderr in the child processes we spawn.
	 */
	sanitize_stdfds();
36 37 38 39
	restore_sigpipe_to_default();

	trace2_initialize();
	trace2_cmd_start(argv);
40
	trace2_collect_process_info();
41

42 43
	git_resolve_executable_dir(argv[0]);

44 45
	git_setup_gettext();

46 47
	initialize_the_repository();

48 49
	attr_start();

50 51 52
	result = cmd_main(argc, argv);

	trace2_cmd_exit(result);
53

54
	return result;
55
}