1#include "cache.h" 2#include "exec_cmd.h" 3 4/* 5 * Many parts of Git have subprograms communicate via pipe, expect the 6 * upstream of a pipe to die with SIGPIPE when the downstream of a 7 * pipe does not need to read all that is written. Some third-party 8 * programs that ignore or block SIGPIPE for their own reason forget 9 * to restore SIGPIPE handling to the default before spawning Git and 10 * break this carefully orchestrated machinery. 11 * 12 * Restore the way SIGPIPE is handled to default, which is what we 13 * expect. 14 */ 15static void restore_sigpipe_to_default(void) 16{ 17 sigset_t unblock; 18 19 sigemptyset(&unblock); 20 sigaddset(&unblock, SIGPIPE); 21 sigprocmask(SIG_UNBLOCK, &unblock, NULL); 22 signal(SIGPIPE, SIG_DFL); 23} 24 25int main(int argc, char **av) 26{ 27 /* 28 * This const trickery is explained in 29 * 84d32bf7678259c08406571cd6ce4b7a6724dcba 30 */ 31 const char **argv = (const char **)av; 32 33 /* 34 * Always open file descriptors 0/1/2 to avoid clobbering files 35 * in die(). It also avoids messing up when the pipes are dup'ed 36 * onto stdin/stdout/stderr in the child processes we spawn. 37 */ 38 sanitize_stdfds(); 39 40 git_setup_gettext(); 41 42 argv[0] = git_extract_argv0_path(argv[0]); 43 44 restore_sigpipe_to_default(); 45 46 return cmd_main(argc, argv); 47}