attr: change validity check for attribute names to use positive logic
[git/git.git] / common-main.c
1 #include "cache.h"
2 #include "exec_cmd.h"
3
4 /*
5 * Many parts of Git have subprograms communicate via pipe, expect the
6 * upstream of a pipe to die with SIGPIPE when the downstream of a
7 * pipe does not need to read all that is written. Some third-party
8 * programs that ignore or block SIGPIPE for their own reason forget
9 * to restore SIGPIPE handling to the default before spawning Git and
10 * break this carefully orchestrated machinery.
11 *
12 * Restore the way SIGPIPE is handled to default, which is what we
13 * expect.
14 */
15 static void restore_sigpipe_to_default(void)
16 {
17 sigset_t unblock;
18
19 sigemptyset(&unblock);
20 sigaddset(&unblock, SIGPIPE);
21 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
22 signal(SIGPIPE, SIG_DFL);
23 }
24
25 int main(int argc, const char **argv)
26 {
27 /*
28 * Always open file descriptors 0/1/2 to avoid clobbering files
29 * in die(). It also avoids messing up when the pipes are dup'ed
30 * onto stdin/stdout/stderr in the child processes we spawn.
31 */
32 sanitize_stdfds();
33
34 git_setup_gettext();
35
36 git_extract_argv0_path(argv[0]);
37
38 restore_sigpipe_to_default();
39
40 return cmd_main(argc, argv);
41 }