Andrew's git - gitweb.git/blob

   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}