/* Test of execute.
   Copyright (C) 2020-2021 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

#include "execute.h"

#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "read-file.h"
#include "macros.h"

#define DATA_FILENAME "test-execute-script.tmp"

int
main ()
{
  unlink (DATA_FILENAME);

  /* Check an invocation of an executable script.
     This should only be supported if the script has a '#!' marker; otherwise
     it is unsecure: <https://sourceware.org/bugzilla/show_bug.cgi?id=13134>.
     POSIX says that the execlp() and execvp() functions support executing
     shell scripts
     <https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
     but this is considered an antiquated feature.  */

  /* This test is an extension of
     "Check stdout is inherited, part 1 (regular file)"
     in test-execute-main.c.  */
  FILE *fp = freopen (DATA_FILENAME, "w", stdout);
  ASSERT (fp != NULL);

  {
    size_t i;

    for (i = 0; i < 2; i++)
      {
        const char *progname =
          (i == 0 ? "executable-script" : "executable-script.sh");
        const char *prog_path =
          (i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
        const char *prog_argv[2] = { prog_path, NULL };

        int ret = execute (progname, prog_argv[0], prog_argv, NULL,
                           false, false, false, false, true, false, NULL);
        ASSERT (ret == 127);
      }
  }

#if defined _WIN32 && !defined __CYGWIN__
  /* On native Windows, scripts - even with '#!' marker - are not executable.
     Only .bat and .cmd files are.  */
  ASSERT (fclose (fp) == 0);
  ASSERT (unlink (DATA_FILENAME) == 0);
  fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
  return 77;
#else
  {
    const char *progname = "executable-shell-script";
    const char *prog_path = SRCDIR "executable-shell-script";
    const char *prog_argv[2] = { prog_path, NULL };

    int ret = execute (progname, prog_argv[0], prog_argv, NULL,
                       false, false, false, false, true, false, NULL);
    ASSERT (ret == 0);

    ASSERT (fclose (fp) == 0);

    size_t length;
    char *contents = read_file (DATA_FILENAME, 0, &length);
    ASSERT (length == 11 && memcmp (contents, "Halle Potta", 11) == 0);
  }

  ASSERT (unlink (DATA_FILENAME) == 0);

  return 0;
#endif
}
