tests/test-execute-script.c

   1 /* Test of execute.
   2    Copyright (C) 2020-2021 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include "execute.h"
  20
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #include "read-file.h"
  27 #include "macros.h"
  28
  29 #define DATA_FILENAME "test-execute-script.tmp"
  30
  31 int
  32 main ()
  33 {
  34   unlink (DATA_FILENAME);
  35
  36   /* Check an invocation of an executable script.
  37      This should only be supported if the script has a '#!' marker; otherwise
  38      it is unsecure: <https://sourceware.org/bugzilla/show_bug.cgi?id=13134>.
  39      POSIX says that the execlp() and execvp() functions support executing
  40      shell scripts
  41      <https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html>,
  42      but this is considered an antiquated feature.  */
  43
  44   /* This test is an extension of
  45      "Check stdout is inherited, part 1 (regular file)"
  46      in test-execute-main.c.  */
  47   FILE *fp = freopen (DATA_FILENAME, "w", stdout);
  48   ASSERT (fp != NULL);
  49
  50   {
  51     size_t i;
  52
  53     for (i = 0; i < 2; i++)
  54       {
  55         const char *progname =
  56           (i == 0 ? "executable-script" : "executable-script.sh");
  57         const char *prog_path =
  58           (i == 0 ? SRCDIR "executable-script" : SRCDIR "executable-script.sh");
  59         const char *prog_argv[2] = { prog_path, NULL };
  60
  61         int ret = execute (progname, prog_argv[0], prog_argv, NULL,
  62                            false, false, false, false, true, false, NULL);
  63         ASSERT (ret == 127);
  64       }
  65   }
  66
  67 #if defined _WIN32 && !defined __CYGWIN__
  68   /* On native Windows, scripts - even with '#!' marker - are not executable.
  69      Only .bat and .cmd files are.  */
  70   ASSERT (fclose (fp) == 0);
  71   ASSERT (unlink (DATA_FILENAME) == 0);
  72   fprintf (stderr, "Skipping test: scripts are not executable on this platform.\n");
  73   return 77;
  74 #else
  75   {
  76     const char *progname = "executable-shell-script";
  77     const char *prog_path = SRCDIR "executable-shell-script";
  78     const char *prog_argv[2] = { prog_path, NULL };
  79
  80     int ret = execute (progname, prog_argv[0], prog_argv, NULL,
  81                        false, false, false, false, true, false, NULL);
  82     ASSERT (ret == 0);
  83
  84     ASSERT (fclose (fp) == 0);
  85
  86     size_t length;
  87     char *contents = read_file (DATA_FILENAME, 0, &length);
  88     ASSERT (length == 11 && memcmp (contents, "Halle Potta", 11) == 0);
  89   }
  90
  91   ASSERT (unlink (DATA_FILENAME) == 0);
  92
  93   return 0;
  94 #endif
  95 }