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/* $Id: suidconnect.c,v 1.10 2006/01/21 23:55:48 dm Exp $ */
/*
*
* Copyright (C) 1998, 1999 David Mazieres (dm@uun.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, 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 "sfs-internal.h"
#include "sfsagent.h"
int suidprotect = 1;
int opt_quiet;
static int
sendfd (int fd, int wfd)
{
char c = '\175';
return writefd (fd, &c, 1, wfd);
}
static void
usage (void)
{
fprintf (stderr, "usage: suidconnect [-q] program\n");
exit (1);
}
static bool_t
checkprog (const char *prog)
{
if (!*prog)
return FALSE;
for (; *prog; prog++)
if (!isalnum (*prog) && *prog != '_')
return FALSE;
return TRUE;
}
static bool_t
getaddr (struct sockaddr_un *sun, const char *prog)
{
static const char *runinplace = "";
static const char suffix[] = ".sock";
const char *sockdir;
#ifdef DMALLOC
if (!suidsafe ()) {
xputenv ("DMALLOC_LOGFILE=/dev/null");
xputenv ("DMALLOC_OPTIONS=");
dmalloc_debug (0);
}
#endif /* DMALLOC */
sockdir = getsfssockdir ();
if (!checkprog (prog)
|| (strlen (sockdir) + 1 + strlen (runinplace)
+ strlen (prog) + sizeof (suffix) > sizeof (sun->sun_path)))
return FALSE;
strcpy (sun->sun_path, sockdir);
strcat (sun->sun_path, runinplace);
strcat (sun->sun_path, "/");
strcat (sun->sun_path, prog);
strcat (sun->sun_path, suffix);
sun->sun_family = AF_UNIX;
return TRUE;
}
int
main (int argc, char **argv)
{
struct sockaddr_un sun;
int fd;
AUTH *auth;
int res;
enum clnt_stat err;
int argn;
for (argn = 1; argn < argc && argv[argn][0] == '-'; argn++) {
if (!strcmp (argv[argn], "-q"))
opt_quiet = 1;
else
usage ();
}
if (argn + 1 != argc || !getaddr (&sun, argv[argn]))
usage ();
if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0
|| connect (fd, (struct sockaddr *) &sun, sizeof (sun)) < 0) {
if (!opt_quiet)
perror (sun.sun_path);
exit (1);
}
auth = authunix_create_realids ();
if (!auth) {
fprintf (stderr, "could not create auth_unix structure\n");
exit (1);
}
err = srpc_callraw (fd, SETUID_PROG, SETUID_VERS, SETUIDPROC_SETUID,
(xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_int, &res,
auth);
if (err)
fprintf (stderr, "%s: %s\n", argv[1], clnt_sperrno (err));
else if (res)
fprintf (stderr, "%s: %s\n", argv[1], strerror (res));
else if (sendfd (0, fd) >= 0) {
#ifdef __APPLE__
/* Work around garbage-collection bug in MacOS where passed socket
* becomes invalid if we exit too soon. */
if (fd < FD_SETSIZE) {
fd_set fds;
struct timeval tv;
FD_ZERO (&fds);
FD_SET (fd, &fds);
tv.tv_sec = 60;
tv.tv_usec = 0;
select (fd + 1, &fds, NULL, NULL, &tv);
}
#endif /* __APPLE__ */
exit (0);
}
else
perror ("suidconnect: sendfd");
exit (1);
}
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