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/* Change the authentication of 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 (setauth);
#define OPT_NO_SAVE 1
static const struct argp_option options[] =
{
#ifdef SU
{"no-save", OPT_NO_SAVE, 0, 0, "Don't save removed effective ids as available ids"},
#else
{"save", 's', 0, 0, "Save removed effective ids as available ids"},
#endif
{"keep", 'k', 0, 0, "Keep old ids in addition to the new ones"},
{ 0 }
};
static struct argp_child child_argps[] = {{ &frobauth_posix_argp }, { 0 }};
static char doc[] =
"Change the authentication of selected processes";
extern error_t
get_nonsugid_ids (struct idvec *uids, struct idvec *gids);
void
main (int argc, char *argv[])
{
error_t err;
auth_t auth; /* Authority to make changes. */
int save = 0, keep = 0;
struct idvec have_uids = IDVEC_INIT, have_gids = IDVEC_INIT;
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 'k': keep = 1; break;
case OPT_NO_SAVE: save = 0; 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 *new,
pid_t pid, void *hook)
{
struct ugids old = UGIDS_INIT;
ugids_set (&old, ugids);
ugids_set (ugids, new);
if (keep)
ugids_merge (ugids, &old);
if (save)
{
ugids_save (&old);
ugids_merge (ugids, &old);
}
return 0;
}
void print_info (const struct ugids *new,
const struct ugids *old,
const struct ugids *user,
pid_t pid, void *hook)
{
char *new_rep = ugids_rep (new, 1, 1, 0, 0, 0);
printf ("%d: Changed auth to %s\n", pid, new_rep);
free (new_rep);
}
struct argp argp = { options, parse_opt, 0, doc, child_argps };
#ifdef SU
frobauth.default_user = 0;
save = 1; /* Default to saving ids */
#endif
/* Parse our command line. This shouldn't ever return an error. */
argp_parse (&argp, argc, argv, 0, 0, &frobauth);
/* See what the invoking user is authorized to do. */
err = get_nonsugid_ids (&have_uids, &have_gids);
if (err)
error (52, err, "Cannot get invoking authentication");
/* Check passwords. */
err = ugids_verify_make_auth (&frobauth.ugids, &have_uids, &have_gids, 0, 0,
0, 0, &auth);
if (err == EACCES)
error (15, 0, "Invalid password");
else if (err)
error (16, err, "Authentication failure");
if (frobauth_modify (&frobauth, &auth, 1, modify, print_info, 0))
exit (0);
else
exit (1);
}
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