contrib/sendmail/test/t_pathconf.c

   1 /*
   2  * Copyright (c) 1999 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  *
   9  */
  10
  11 /*
  12 **  The following test program tries the pathconf(2) routine.  It should
  13 **  be run in a non-NFS-mounted directory (e.g., /tmp) and on remote (NFS)
  14 **  mounted directories running both NFS-v2 and NFS-v3 from systems that
  15 **  both do and do not permit file giveaway.
  16 */
  17
  18 #include <sys/types.h>
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #ifdef EX_OK
  24 # undef EX_OK           /* unistd.h may have another use for this */
  25 #endif /* EX_OK */
  26 #include <sysexits.h>
  27
  28 #ifndef lint
  29 static char id[] = "@(#)$Id: t_pathconf.c,v 8.6 2001/09/23 03:35:41 ca Exp $";
  30 #endif /* ! lint */
  31
  32 int
  33 main(argc, argv)
  34         int argc;
  35         char **argv;
  36 {
  37         int fd;
  38         int i;
  39         char tbuf[100];
  40         extern int errno;
  41
  42         if (geteuid() == 0)
  43         {
  44                 printf("*** Run me as a non-root user! ***\n");
  45                 exit(EX_USAGE);
  46         }
  47
  48         strcpy(tbuf, "TXXXXXX");
  49         fd = mkstemp(tbuf);
  50         if (fd < 0)
  51         {
  52                 printf("*** Could not create test file %s\n", tbuf);
  53                 exit(EX_CANTCREAT);
  54         }
  55         errno = 0;
  56         i = pathconf(".", _PC_CHOWN_RESTRICTED);
  57         printf("pathconf(.) returns %2d, errno = %d\n", i, errno);
  58         errno = 0;
  59         i = pathconf(tbuf, _PC_CHOWN_RESTRICTED);
  60         printf("pathconf(%s) returns %2d, errno = %d\n", tbuf, i, errno);
  61         errno = 0;
  62         i = fpathconf(fd, _PC_CHOWN_RESTRICTED);
  63         printf("fpathconf(%s) returns %2d, errno = %d\n", tbuf, i, errno);
  64         if (errno == 0 && i >= 0)
  65         {
  66                 /* so it claims that it doesn't work -- try anyhow */
  67                 printf("  fpathconf claims that chown is safe ");
  68                 if (fchown(fd, 1, 1) >= 0)
  69                         printf("*** but fchown works anyhow! ***\n");
  70                 else
  71                         printf("and fchown agrees\n");
  72         }
  73         else
  74         {
  75                 /* well, let's see what really happens */
  76                 printf("  fpathconf claims that chown is not safe ");
  77                 if (fchown(fd, 1, 1) >= 0)
  78                         printf("as indeed it is not\n");
  79                 else
  80                         printf("*** but in fact it is safe ***\n");
  81         }
  82         (void) unlink(tbuf);
  83         exit(EX_OK);
  84 }