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/* $Id: pathinfo.c,v 1.4 2002/08/07 18:36:21 dm Exp $ */
/*
*
* Copyright (C) 2001 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 "sysconf.h"
#include "rwfd.h"
int suidprotect = 1;
char *progname;
static void fperror (char *msg) __attribute__ ((noreturn));
static void
fperror (char *msg)
{
perror (msg);
exit (1);
}
static int
isunixsocket (int fd)
{
struct sockaddr_un su;
socklen_t sulen = sizeof (su);
bzero (&su, sizeof (su));
su.sun_family = AF_UNIX;
if (getsockname (fd, (struct sockaddr *) &su, &sulen) < 0
|| su.sun_family != AF_UNIX)
return -1;
return 0;
}
static void
pathinfo (char *path)
{
int fd;
struct stat sb;
dev_t dev;
char cwd[PATH_MAX+1];
char buf[2*PATH_MAX+3];
char res[3*PATH_MAX+40];
char *rp;
FILE *dfpipe;
if (chdir (path) < 0
|| (fd = open (".", O_RDONLY)) < 0
|| fstat (fd, &sb) < 0)
fperror (path);
dev = sb.st_dev;
if (!getcwd (cwd, sizeof (cwd)))
fperror ("getcwd");
strcpy (buf, cwd);
while ((rp = strrchr (buf, '/'))) {
rp[1] = '\0';
if (stat (buf, &sb) < 0)
fperror (buf);
if (sb.st_dev != dev) {
if (!(rp = strchr (cwd + (rp - buf) + 1, '/')))
rp = "/";
break;
}
rp[0] = '\0';
}
if (!rp)
rp = cwd;
dfpipe = popen (PATH_DF
#ifdef DF_NEEDS_DASH_K
" -k"
#endif /* DF_NEEDS_DASH_K */
" . | sed -ne '2s/ .*//; 2p'", "r");
if (!dfpipe || !fgets (buf, sizeof (buf) - 1, dfpipe)
|| pclose (dfpipe) < 0)
fperror (PATH_DF);
if (!strchr (buf, '\n'))
strcat (buf, "\n");
sprintf (res, "0x%" U64F "x\n%s%s\n", (u_int64_t) dev, buf, rp);
if (isunixsocket (1) < 0)
write (1, res, strlen (res));
else
writefd (1, res, strlen (res), fd);
}
static void
usage (void)
{
fprintf (stderr, "usage: %s [-u uid] path\n", progname);
exit (1);
}
int
main (int argc, char **argv)
{
int ch;
if ((progname = strrchr (argv[0], '/')))
progname++;
else
progname = argv[0];
while ((ch = getopt (argc, argv, "u:")) != -1)
switch (ch) {
case 'u':
if (setuid (atoi (optarg)) < 0)
fperror ("setuid");
break;
default:
usage ();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage ();
pathinfo (argv[0]);
exit (0);
}
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