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[gnulib.git] / lib / execute.c

diff --git a/lib/execute.c b/lib/execute.c
index 71da46f..253b5a6 100644 (file)
--- a/lib/execute.c
+++ b/lib/execute.c
@@ -35,7 +35,7 @@
 
 #define _(str) gettext (str)
 
-#if defined _MSC_VER || defined __MINGW32__
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
 
 /* Native Woe32 API.  */
 # include <process.h>
@@ -44,13 +44,7 @@
 #else
 
 /* Unix API.  */
-# if HAVE_POSIX_SPAWN
-#  include <spawn.h>
-# else
-#  if HAVE_VFORK_H
-#   include <vfork.h>
-#  endif
-# endif
+# include <spawn.h>
 
 #endif
 
@@ -110,7 +104,7 @@ execute (const char *progname,
         bool slave_process, bool exit_on_error,
         int *termsigp)
 {
-#if defined _MSC_VER || defined __MINGW32__
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
 
   /* Native Woe32 API.  */
   int orig_stdin;
@@ -125,11 +119,11 @@ execute (const char *progname,
 
   /* Save standard file handles of parent process.  */
   if (null_stdin)
-    orig_stdin = dup_noinherit (STDIN_FILENO);
+    orig_stdin = dup_safer_noinherit (STDIN_FILENO);
   if (null_stdout)
-    orig_stdout = dup_noinherit (STDOUT_FILENO);
+    orig_stdout = dup_safer_noinherit (STDOUT_FILENO);
   if (null_stderr)
-    orig_stderr = dup_noinherit (STDERR_FILENO);
+    orig_stderr = dup_safer_noinherit (STDERR_FILENO);
   exitcode = -1;
 
   /* Create standard file handles of child process.  */
@@ -160,14 +154,16 @@ execute (const char *progname,
        copy of the environment block - ignoring the effects of putenv() and
        [un]setenv().  */
     {
-      exitcode = spawnvpe (P_WAIT, prog_path, prog_argv, environ);
+      exitcode = spawnvpe (P_WAIT, prog_path, (const char **) prog_argv,
+                          (const char **) environ);
       if (exitcode < 0 && errno == ENOEXEC)
        {
          /* prog is not an native executable.  Try to execute it as a
             shell script.  Note that prepare_spawn() has already prepended
             a hidden element "sh.exe" to prog_argv.  */
          --prog_argv;
-         exitcode = spawnvpe (P_WAIT, prog_argv[0], prog_argv, environ);
+         exitcode = spawnvpe (P_WAIT, prog_argv[0], (const char **) prog_argv,
+                              (const char **) environ);
        }
     }
   if (nulloutfd >= 0)
@@ -177,11 +173,11 @@ execute (const char *progname,
 
   /* Restore standard file handles of parent process.  */
   if (null_stderr)
-    dup2 (orig_stderr, STDERR_FILENO), close (orig_stderr);
+    undup_safer_noinherit (orig_stderr, STDERR_FILENO);
   if (null_stdout)
-    dup2 (orig_stdout, STDOUT_FILENO), close (orig_stdout);
+    undup_safer_noinherit (orig_stdout, STDOUT_FILENO);
   if (null_stdin)
-    dup2 (orig_stdin, STDIN_FILENO), close (orig_stdin);
+    undup_safer_noinherit (orig_stdin, STDIN_FILENO);
 
   if (termsigp != NULL)
     *termsigp = 0;
@@ -204,7 +200,6 @@ execute (const char *progname,
      subprocess to exit with return code 127.  It is implementation
      dependent which error is reported which way.  We treat both cases as
      equivalent.  */
-#if HAVE_POSIX_SPAWN
   sigset_t blocked_signals;
   posix_spawn_file_actions_t actions;
   bool actions_allocated;
@@ -212,11 +207,7 @@ execute (const char *progname,
   bool attrs_allocated;
   int err;
   pid_t child;
-#else
-  int child;
-#endif
 
-#if HAVE_POSIX_SPAWN
   if (slave_process)
     {
       sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
@@ -274,48 +265,6 @@ execute (const char *progname,
   posix_spawn_file_actions_destroy (&actions);
   if (attrs_allocated)
     posix_spawnattr_destroy (&attrs);
-#else
-  if (slave_process)
-    block_fatal_signals ();
-  /* Use vfork() instead of fork() for efficiency.  */
-  if ((child = vfork ()) == 0)
-    {
-      /* Child process code.  */
-      int nullinfd;
-      int nulloutfd;
-
-      if ((!null_stdin
-          || ((nullinfd = open ("/dev/null", O_RDONLY, 0)) >= 0
-              && (nullinfd == STDIN_FILENO
-                  || (dup2 (nullinfd, STDIN_FILENO) >= 0
-                      && close (nullinfd) >= 0))))
-         && (!(null_stdout || null_stderr)
-             || ((nulloutfd = open ("/dev/null", O_RDWR, 0)) >= 0
-                 && (!null_stdout
-                     || nulloutfd == STDOUT_FILENO
-                     || dup2 (nulloutfd, STDOUT_FILENO) >= 0)
-                 && (!null_stderr
-                     || nulloutfd == STDERR_FILENO
-                     || dup2 (nulloutfd, STDERR_FILENO) >= 0)
-                 && ((null_stdout && nulloutfd == STDOUT_FILENO)
-                     || (null_stderr && nulloutfd == STDERR_FILENO)
-                     || close (nulloutfd) >= 0)))
-         && (!slave_process || (unblock_fatal_signals (), true)))
-       execvp (prog_path, prog_argv);
-      _exit (127);
-    }
-  if (child == -1)
-    {
-      if (slave_process)
-       unblock_fatal_signals ();
-      if (termsigp != NULL)
-       *termsigp = 0;
-      if (exit_on_error || !null_stderr)
-       error (exit_on_error ? EXIT_FAILURE : 0, errno,
-              _("%s subprocess failed"), progname);
-      return 127;
-    }
-#endif
   if (slave_process)
     {
       register_slave_subprocess (child);