Andrew's git - gitweb.git/blob

   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, const char **argv)
  26{
  27        /*
  28         * Always open file descriptors 0/1/2 to avoid clobbering files
  29         * in die().  It also avoids messing up when the pipes are dup'ed
  30         * onto stdin/stdout/stderr in the child processes we spawn.
  31         */
  32        sanitize_stdfds();
  33
  34        git_setup_gettext();
  35
  36        argv[0] = git_extract_argv0_path(argv[0]);
  37
  38        restore_sigpipe_to_default();
  39
  40        return cmd_main(argc, argv);
  41}