1#include "cache.h" 2#include "exec-cmd.h" 3#include "attr.h" 4 5/* 6 * Many parts of Git have subprograms communicate via pipe, expect the 7 * upstream of a pipe to die with SIGPIPE when the downstream of a 8 * pipe does not need to read all that is written. Some third-party 9 * programs that ignore or block SIGPIPE for their own reason forget 10 * to restore SIGPIPE handling to the default before spawning Git and 11 * break this carefully orchestrated machinery. 12 * 13 * Restore the way SIGPIPE is handled to default, which is what we 14 * expect. 15 */ 16static void restore_sigpipe_to_default(void) 17{ 18 sigset_t unblock; 19 20 sigemptyset(&unblock); 21 sigaddset(&unblock, SIGPIPE); 22 sigprocmask(SIG_UNBLOCK, &unblock, NULL); 23 signal(SIGPIPE, SIG_DFL); 24} 25 26int main(int argc, const char **argv) 27{ 28 int result; 29 30 trace2_initialize_clock(); 31 32 /* 33 * Always open file descriptors 0/1/2 to avoid clobbering files 34 * in die(). It also avoids messing up when the pipes are dup'ed 35 * onto stdin/stdout/stderr in the child processes we spawn. 36 */ 37 sanitize_stdfds(); 38 restore_sigpipe_to_default(); 39 40 git_resolve_executable_dir(argv[0]); 41 42 trace2_initialize(); 43 trace2_cmd_start(argv); 44 trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); 45 46 git_setup_gettext(); 47 48 initialize_the_repository(); 49 50 attr_start(); 51 52 result = cmd_main(argc, argv); 53 54 trace2_cmd_exit(result); 55 56 return result; 57}