2005-01-27 Jakub Jelinek <jakub@redhat.com>

	* posix/execvp.c: Include stdbool.h.

1 files changed, 66 insertions, 30 deletions

diff --git a/posix/execvp.c b/posix/execvp.c
index d6f60c02e7..a79d4a89c5 100644
--- a/posix/execvp.c
+++ b/posix/execvp.c
@@ -18,6 +18,7 @@
 
 #include <unistd.h>
 #include <stdarg.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -26,9 +27,9 @@
 
 /* The file is accessible but it is not an executable file.  Invoke
    the shell to interpret it as a script.  */
-static void
+static char **
 internal_function
-script_execute (const char *file, char *const argv[])
+allocate_scripts_argv (const char *file, char *const argv[])
 {
   /* Count the arguments.  */
   int argc = 0;
@@ -36,19 +37,19 @@ script_execute (const char *file, char *const argv[])
     ;
 
   /* Construct an argument list for the shell.  */
-  {
-    char *new_argv[argc + 1];
-    new_argv[0] = (char *) _PATH_BSHELL;
-    new_argv[1] = (char *) file;
-    while (argc > 1)
-      {
-	new_argv[argc] = argv[argc - 1];
-	--argc;
-      }
-
-    /* Execute the shell.  */
-    __execve (new_argv[0], new_argv, __environ);
-  }
+  char **new_argv = (char **) malloc ((argc + 1) * sizeof (char *));
+  if (new_argv != NULL)
+    {
+      new_argv[0] = (char *) _PATH_BSHELL;
+      new_argv[1] = (char *) file;
+      while (argc > 1)
+	{
+	  new_argv[argc] = argv[argc - 1];
+	  --argc;
+	}
+    }
+
+  return new_argv;
 }
 
 
@@ -66,42 +67,58 @@ execvp (file, argv)
       return -1;
     }
 
+  char **script_argv = NULL;
+
   if (strchr (file, '/') != NULL)
     {
       /* Don't search when it contains a slash.  */
       __execve (file, argv, __environ);
 
       if (errno == ENOEXEC)
-	script_execute (file, argv);
+	{
+	  script_argv = allocate_scripts_argv (file, argv);
+	  if (script_argv != NULL)
+	    {
+	      __execve (script_argv[0], script_argv, __environ);
+
+	      free (script_argv);
+	    }
+	}
     }
   else
     {
-      int got_eacces = 0;
-      char *path, *p, *name;
-      size_t len;
-      size_t pathlen;
-
-      path = getenv ("PATH");
+      char *path = getenv ("PATH");
+      bool path_malloc = false;
       if (path == NULL)
 	{
 	  /* There is no `PATH' in the environment.
 	     The default search path is the current directory
 	     followed by the path `confstr' returns for `_CS_PATH'.  */
-	  len = confstr (_CS_PATH, (char *) NULL, 0);
-	  path = (char *) __alloca (1 + len);
+	  size_t len = confstr (_CS_PATH, (char *) NULL, 0);
+	  path = (char *) malloc (1 + len);
+	  if (path == NULL)
+	    return -1;
 	  path[0] = ':';
 	  (void) confstr (_CS_PATH, path + 1, len);
+	  path_malloc = true;
 	}
 
-      len = strlen (file) + 1;
-      pathlen = strlen (path);
-      name = __alloca (pathlen + len + 1);
+      size_t len = strlen (file) + 1;
+      size_t pathlen = strlen (path);
+      char *name = malloc (pathlen + len + 1);
+      if (name == NULL)
+	{
+	  if (path_malloc)
+	    free (path);
+	  return -1;
+	}
       /* Copy the file name at the top.  */
       name = (char *) memcpy (name + pathlen + 1, file, len);
       /* And add the slash.  */
       *--name = '/';
 
-      p = path;
+      bool got_eacces = false;
+      char *p = path;
       do
 	{
 	  char *startp;
@@ -120,7 +137,21 @@ execvp (file, argv)
 	  __execve (startp, argv, __environ);
 
 	  if (errno == ENOEXEC)
-	    script_execute (startp, argv);
+	    {
+	      if (script_argv == NULL)
+		{
+		  script_argv = allocate_scripts_argv (file, argv);
+		  if (script_argv == NULL)
+		    {
+		      /* A possible EACCES error is not as important as
+			 the ENOMEM.  */
+		      got_eacces = false;
+		      break;
+		    }
+		}
+
+	      __execve (script_argv[0], script_argv, __environ);
+	    }
 
 	  switch (errno)
 	    {
@@ -128,7 +159,7 @@ execvp (file, argv)
 	      /* Record the we got a `Permission denied' error.  If we end
 		 up finding no executable we can use, we want to diagnose
 		 that we did find one but were denied access.  */
-	      got_eacces = 1;
+	      got_eacces = true;
 	    case ENOENT:
 	    case ESTALE:
 	    case ENOTDIR:
@@ -156,6 +187,11 @@ execvp (file, argv)
 	/* At least one failure was due to permissions, so report that
            error.  */
 	__set_errno (EACCES);
+
+      free (script_argv);
+      free (name);
+      if (path_malloc)
+	free (path);
     }
 
   /* Return the error from the last attempt (probably ENOENT).  */