dir.h: move DTYPE defines from cache.h
[git.git] / common-main.c
blob601a875e2fbc7d6d5e244ea9a35654afeec733c0
1 #include "cache.h"
2 #include "exec-cmd.h"
3 #include "gettext.h"
4 #include "attr.h"
5 #include "setup.h"
6 #include "strbuf.h"
7 #include "trace2.h"
9 /*
10 * Many parts of Git have subprograms communicate via pipe, expect the
11 * upstream of a pipe to die with SIGPIPE when the downstream of a
12 * pipe does not need to read all that is written. Some third-party
13 * programs that ignore or block SIGPIPE for their own reason forget
14 * to restore SIGPIPE handling to the default before spawning Git and
15 * break this carefully orchestrated machinery.
17 * Restore the way SIGPIPE is handled to default, which is what we
18 * expect.
20 static void restore_sigpipe_to_default(void)
22 sigset_t unblock;
24 sigemptyset(&unblock);
25 sigaddset(&unblock, SIGPIPE);
26 sigprocmask(SIG_UNBLOCK, &unblock, NULL);
27 signal(SIGPIPE, SIG_DFL);
30 int main(int argc, const char **argv)
32 int result;
33 struct strbuf tmp = STRBUF_INIT;
35 trace2_initialize_clock();
38 * Always open file descriptors 0/1/2 to avoid clobbering files
39 * in die(). It also avoids messing up when the pipes are dup'ed
40 * onto stdin/stdout/stderr in the child processes we spawn.
42 sanitize_stdfds();
43 restore_sigpipe_to_default();
45 git_resolve_executable_dir(argv[0]);
47 setlocale(LC_CTYPE, "");
48 git_setup_gettext();
50 initialize_the_repository();
52 attr_start();
54 trace2_initialize();
55 trace2_cmd_start(argv);
56 trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);
58 if (!strbuf_getcwd(&tmp))
59 tmp_original_cwd = strbuf_detach(&tmp, NULL);
61 result = cmd_main(argc, argv);
63 /* Not exit(3), but a wrapper calling our common_exit() */
64 exit(result);
67 static void check_bug_if_BUG(void)
69 if (!bug_called_must_BUG)
70 return;
71 BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()");
74 /* We wrap exit() to call common_exit() in git-compat-util.h */
75 int common_exit(const char *file, int line, int code)
78 * For non-POSIX systems: Take the lowest 8 bits of the "code"
79 * to e.g. turn -1 into 255. On a POSIX system this is
80 * redundant, see exit(3) and wait(2), but as it doesn't harm
81 * anything there we don't need to guard this with an "ifdef".
83 code &= 0xff;
85 check_bug_if_BUG();
86 trace2_cmd_exit_fl(file, line, code);
88 return code;