implemented numeric sort (sort -g)

[oweals/busybox.git] / chroot.c

diff --git a/chroot.c b/chroot.c
index ca0bfcf3fbc6c58a3506b5c2f36b8049f1273b83..16524d92eae2f2f53fde2c0343b7df05cbb24fc3 100644 (file)
--- a/chroot.c
+++ b/chroot.c
@@ -1,32 +1,66 @@
+/*
+ * Mini chroot implementation for busybox
+ *
+ *
+ * Copyright (C) 1999 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ *
+ * 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 2 of the License, 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
 #include "internal.h"
+#include <stdlib.h>
 #include <stdio.h>
-#include <unistd.h>
+#include <errno.h>
+
+
+static const char chroot_usage[] = "chroot NEWROOT [COMMAND...]\n\n"
+"Run COMMAND with root directory set to NEWROOT.\n";
 
 
-const char chroot_usage[] = "chroot directory [command]\n"
-  "Run a command with special root directory.\n";
 
-extern int
-chroot_main (struct FileInfo *i, int argc, char **argv)
+int chroot_main(int argc, char **argv)
 {
-  char *prog;
+    if ( (argc < 2) || (**(argv+1) == '-') ) {
+       usage( chroot_usage);
+    }
+    argc--;
+    argv++;
 
-  if (chroot (argv[1]))
-    {
-      name_and_error ("cannot chroot to that directory");
-      return 1;
+    if (chroot (*argv) || (chdir ("/"))) {
+       fprintf(stderr, "chroot: cannot change root directory to %s: %s\n",
+               *argv, strerror(errno));
+       exit( FALSE);
     }
-  if (argc > 2)
-    {
-      execvp (argv[2], argv + 2);
+
+    argc--;
+    argv++;
+    if (argc >= 1) {
+       fprintf(stderr, "command: %s\n", *argv);
+       execvp (*argv, argv);
     }
-  else
-    {
-      prog = getenv ("SHELL");
-      if (!prog)
-       prog = "/bin/sh";
-      execlp (prog, prog, NULL);
+    else {
+       char *prog;
+       prog = getenv ("SHELL");
+       if (!prog)
+           prog = "/bin/sh";
+       execlp (prog, prog, NULL);
     }
-  name_and_error ("cannot exec");
-  return 1;
+    fprintf(stderr, "chroot: cannot execute %s: %s\n",
+               *argv, strerror(errno));
+    exit( FALSE);
 }
+