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84 lines
2.1 KiB
84 lines
2.1 KiB
#include "cache.h" |
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#include "exec-cmd.h" |
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#include "attr.h" |
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/* |
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* Many parts of Git have subprograms communicate via pipe, expect the |
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* upstream of a pipe to die with SIGPIPE when the downstream of a |
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* pipe does not need to read all that is written. Some third-party |
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* programs that ignore or block SIGPIPE for their own reason forget |
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* to restore SIGPIPE handling to the default before spawning Git and |
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* break this carefully orchestrated machinery. |
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* |
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* Restore the way SIGPIPE is handled to default, which is what we |
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* expect. |
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*/ |
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static void restore_sigpipe_to_default(void) |
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{ |
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sigset_t unblock; |
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sigemptyset(&unblock); |
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sigaddset(&unblock, SIGPIPE); |
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sigprocmask(SIG_UNBLOCK, &unblock, NULL); |
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signal(SIGPIPE, SIG_DFL); |
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} |
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int main(int argc, const char **argv) |
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{ |
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int result; |
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struct strbuf tmp = STRBUF_INIT; |
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trace2_initialize_clock(); |
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/* |
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* Always open file descriptors 0/1/2 to avoid clobbering files |
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* in die(). It also avoids messing up when the pipes are dup'ed |
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* onto stdin/stdout/stderr in the child processes we spawn. |
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*/ |
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sanitize_stdfds(); |
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restore_sigpipe_to_default(); |
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git_resolve_executable_dir(argv[0]); |
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git_setup_gettext(); |
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initialize_the_repository(); |
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attr_start(); |
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trace2_initialize(); |
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trace2_cmd_start(argv); |
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trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); |
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if (!strbuf_getcwd(&tmp)) |
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tmp_original_cwd = strbuf_detach(&tmp, NULL); |
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result = cmd_main(argc, argv); |
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/* Not exit(3), but a wrapper calling our common_exit() */ |
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exit(result); |
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} |
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static void check_bug_if_BUG(void) |
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{ |
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if (!bug_called_must_BUG) |
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return; |
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BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()"); |
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} |
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/* We wrap exit() to call common_exit() in git-compat-util.h */ |
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int common_exit(const char *file, int line, int code) |
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{ |
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/* |
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* For non-POSIX systems: Take the lowest 8 bits of the "code" |
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* to e.g. turn -1 into 255. On a POSIX system this is |
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* redundant, see exit(3) and wait(2), but as it doesn't harm |
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* anything there we don't need to guard this with an "ifdef". |
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*/ |
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code &= 0xff; |
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check_bug_if_BUG(); |
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trace2_cmd_exit_fl(file, line, code); |
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return code; |
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}
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