6 * Many parts of Git have subprograms communicate via pipe, expect the
7 * upstream of a pipe to die with SIGPIPE when the downstream of a
8 * pipe does not need to read all that is written. Some third-party
9 * programs that ignore or block SIGPIPE for their own reason forget
10 * to restore SIGPIPE handling to the default before spawning Git and
11 * break this carefully orchestrated machinery.
13 * Restore the way SIGPIPE is handled to default, which is what we
16 static void restore_sigpipe_to_default(void)
20 sigemptyset(&unblock);
21 sigaddset(&unblock, SIGPIPE);
22 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
23 signal(SIGPIPE, SIG_DFL);
26 int main(int argc, const char **argv)
30 trace2_initialize_clock();
33 * Always open file descriptors 0/1/2 to avoid clobbering files
34 * in die(). It also avoids messing up when the pipes are dup'ed
35 * onto stdin/stdout/stderr in the child processes we spawn.
38 restore_sigpipe_to_default();
40 git_resolve_executable_dir(argv[0]);
43 trace2_cmd_start(argv);
44 trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
48 initialize_the_repository();
52 result = cmd_main(argc, argv);
54 trace2_cmd_exit(result);