Merge branch 'dl/compat-cleanup'
[git/git.git] / common-main.c
1 #include "cache.h"
2 #include "exec-cmd.h"
3 #include "attr.h"
4
5 /*
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.
12 *
13 * Restore the way SIGPIPE is handled to default, which is what we
14 * expect.
15 */
16 static void restore_sigpipe_to_default(void)
17 {
18 sigset_t unblock;
19
20 sigemptyset(&unblock);
21 sigaddset(&unblock, SIGPIPE);
22 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
23 signal(SIGPIPE, SIG_DFL);
24 }
25
26 int main(int argc, const char **argv)
27 {
28 int result;
29
30 trace2_initialize_clock();
31
32 /*
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.
36 */
37 sanitize_stdfds();
38 restore_sigpipe_to_default();
39
40 git_resolve_executable_dir(argv[0]);
41
42 git_setup_gettext();
43
44 initialize_the_repository();
45
46 attr_start();
47
48 trace2_initialize();
49 trace2_cmd_start(argv);
50 trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
51
52 result = cmd_main(argc, argv);
53
54 trace2_cmd_exit(result);
55
56 return result;
57 }