1 files changed, 121 insertions, 0 deletions
diff --git a/utils/rmauth.c b/utils/rmauth.c
new file mode 100644
index 00000000..56d6a6a4
--- /dev/null
+++ b/utils/rmauth.c
@@ -0,0 +1,121 @@
+/* Remove authentication from selected processes
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <argp.h>
+#include <error.h>
+#include <version.h>
+
+#include "frobauth.h"
+
+const char *argp_program_version = STANDARD_HURD_VERSION (rmauth);
+
+static const struct argp_option options[] =
+{
+#ifndef UNSU
+  {"save",   's', 0, 0, "Save removed effective ids as available ids"},
+#endif
+  { 0 }
+};
+
+#ifdef UNSU
+static struct argp_child child_argps[] = {{ &frobauth_posix_argp }, { 0 }};
+#else
+static struct argp_child child_argps[] = {{ &frobauth_ea_argp }, { 0 }};
+#endif
+
+static char doc[] =
+  "Remove user/group ids from the authentication of selected processes";
+
+void 
+main (int argc, char *argv[])
+{
+  int save = 0;			/* save effective ids */
+  struct frobauth frobauth = FROBAUTH_INIT;
+  error_t parse_opt (int key, char *arg, struct argp_state *state)
+    {
+      switch (key)
+	{
+	case 's': save = 1; break;
+	case ARGP_KEY_INIT:
+	  state->child_inputs[0] = state->input; break;
+	default:
+	  return ARGP_ERR_UNKNOWN;
+	}
+      return 0;
+    }
+  /* Modify UGIDS, to be what PID's new authentication should be, UGIDS is
+     what the user specified.  */
+  error_t modify (struct ugids *ugids, const struct ugids *remove,
+		  pid_t pid, void *hook)
+    {
+      error_t err = 0;
+      struct ugids saved = UGIDS_INIT;
+
+      if (save)
+	ugids_set (&saved, ugids);
+
+      err = ugids_subtract (ugids, remove);
+
+      if (save)
+	{
+	  ugids_subtract (&saved, ugids);
+	  ugids_save (&saved);
+	  ugids_merge (ugids, &saved);
+	}
+
+      return err;
+    }
+  void print_info (const struct ugids *new,
+		   const struct ugids *old,
+		   const struct ugids *removed,
+		   pid_t pid, void *hook)
+    {
+      char *delta_rep;
+      struct ugids delta = UGIDS_INIT;
+
+      ugids_set (&delta, old);
+      ugids_subtract (&delta, new);
+
+      delta_rep = ugids_rep (&delta, 1, 1, 0, 0, 0);
+      printf ("%d: Removed %s\n", pid, delta_rep);
+
+      free (delta_rep);
+      ugids_fini (&delta);
+    }
+  struct argp argp = { options, parse_opt, 0, doc, child_argps };
+
+#ifdef UNSU
+  frobauth.default_user = 0;
+#endif
+  frobauth.require_ids = 1;
+
+  /* Parse our command line.  This shouldn't ever return an error.  */
+  argp_parse (&argp, argc, argv, 0, 0, &frobauth);
+
+  if (frobauth_modify (&frobauth, modify, print_info, 0))
+    exit (0);
+  else
+    exit (1);
+}