| #include "git-compat-util.h" |
| #include "exec-cmd.h" |
| #include "gettext.h" |
| #include "attr.h" |
| #include "repository.h" |
| #include "setup.h" |
| #include "strbuf.h" |
| #include "trace2.h" |
| |
| /* |
| * 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); |
| } |
| |
| int main(int argc, const char **argv) |
| { |
| int result; |
| struct strbuf tmp = STRBUF_INIT; |
| |
| trace2_initialize_clock(); |
| |
| /* |
| * 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(); |
| restore_sigpipe_to_default(); |
| |
| git_resolve_executable_dir(argv[0]); |
| |
| setlocale(LC_CTYPE, ""); |
| git_setup_gettext(); |
| |
| initialize_repository(the_repository); |
| |
| attr_start(); |
| |
| trace2_initialize(); |
| trace2_cmd_start(argv); |
| trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); |
| |
| if (!strbuf_getcwd(&tmp)) |
| tmp_original_cwd = strbuf_detach(&tmp, NULL); |
| |
| result = cmd_main(argc, argv); |
| |
| /* Not exit(3), but a wrapper calling our common_exit() */ |
| exit(result); |
| } |
| |
| static void check_bug_if_BUG(void) |
| { |
| if (!bug_called_must_BUG) |
| return; |
| BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()"); |
| } |
| |
| /* We wrap exit() to call common_exit() in git-compat-util.h */ |
| int common_exit(const char *file, int line, int code) |
| { |
| /* |
| * For non-POSIX systems: Take the lowest 8 bits of the "code" |
| * to e.g. turn -1 into 255. On a POSIX system this is |
| * redundant, see exit(3) and wait(2), but as it doesn't harm |
| * anything there we don't need to guard this with an "ifdef". |
| */ |
| code &= 0xff; |
| |
| check_bug_if_BUG(); |
| trace2_cmd_exit_fl(file, line, code); |
| |
| return code; |
| } |