From 1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5 Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Sat, 11 Jan 2020 23:36:56 +0000 Subject: Squashed 'third_party/git/' content from commit cb71568594 git-subtree-dir: third_party/git git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7 --- common-main.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 common-main.c (limited to 'common-main.c') diff --git a/common-main.c b/common-main.c new file mode 100644 index 000000000000..582a7b18869f --- /dev/null +++ b/common-main.c @@ -0,0 +1,57 @@ +#include "cache.h" +#include "exec-cmd.h" +#include "attr.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; + + 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]); + + trace2_initialize(); + trace2_cmd_start(argv); + trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); + + git_setup_gettext(); + + initialize_the_repository(); + + attr_start(); + + result = cmd_main(argc, argv); + + trace2_cmd_exit(result); + + return result; +} -- cgit 1.4.1