#define USE_THE_REPOSITORY_VARIABLE

#include "git-compat-util.h"

#include "exec-cmd.h"

#include "gettext.h"

#include "attr.h"

#include "repository.h"

#include "setup.h"

#include "strbuf.h"

#include "trace2.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;

  struct strbuf tmp = STRBUF_INIT;

  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]);

  setlocale(LC_CTYPE, "");

  git_setup_gettext();

  initialize_repository(the_repository);

  attr_start();

  trace2_initialize();

  trace2_cmd_start(argv);

  trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP);

  if (!strbuf_getcwd(&tmp))

    tmp_original_cwd = strbuf_detach(&tmp, NULL);

  result = cmd_main(argc, argv);

  /* Not exit(3), but a wrapper calling our common_exit() */

  exit(result);

}

static void check_bug_if_BUG(void)

{

  if (!bug_called_must_BUG)

    return;

  BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()");

}

/* We wrap exit() to call common_exit() in git-compat-util.h */

int common_exit(const char *file, int line, int code)

{

  /*

   * For non-POSIX systems: Take the lowest 8 bits of the "code"

   * to e.g. turn -1 into 255. On a POSIX system this is

   * redundant, see exit(3) and wait(2), but as it doesn't harm

   * anything there we don't need to guard this with an "ifdef".

   */

  code &= 0xff;

  check_bug_if_BUG();

  trace2_cmd_exit_fl(file, line, code);

  return code;

}