tests/fs/ptyfs/t_nullpts.c

   1 /*      $NetBSD: t_nullpts.c,v 1.5 2011/01/10 11:11:04 hannken Exp $    */
   2
   3 #include <sys/types.h>
   4 #include <sys/mount.h>
   5 #include <sys/ioctl.h>
   6
   7 #include <atf-c.h>
   8 #include <err.h>
   9 #include <errno.h>
  10 #include <fcntl.h>
  11 #include <stdio.h>
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15
  16 #include <rump/rump.h>
  17 #include <rump/rump_syscalls.h>
  18
  19 #include <fs/ptyfs/ptyfs.h>
  20 #include <miscfs/nullfs/null.h>
  21
  22 #include "../../h_macros.h"
  23
  24 static void
  25 mountptyfs(const char *mp, int flags)
  26 {
  27         struct ptyfs_args args;
  28
  29         if (rump_sys_mkdir(mp, 0777) == -1) {
  30                 if (errno != EEXIST)
  31                         atf_tc_fail_errno("null create %s", mp);
  32         }
  33         memset(&args, 0, sizeof(args));
  34         args.version = PTYFS_ARGSVERSION;
  35         args.mode = 0777;
  36         if (rump_sys_mount(MOUNT_PTYFS, mp, flags, &args, sizeof(args)) == -1)
  37                 atf_tc_fail_errno("could not mount ptyfs");
  38 }
  39
  40 static void
  41 mountnull(const char *what, const char *mp, int flags)
  42 {
  43         struct null_args nargs;
  44
  45         if (rump_sys_mkdir(what, 0777) == -1) {
  46                 if (errno != EEXIST)
  47                         atf_tc_fail_errno("null create %s", what);
  48         }
  49         if (rump_sys_mkdir(mp, 0777) == -1) {
  50                 if (errno != EEXIST)
  51                         atf_tc_fail_errno("null create %s", mp);
  52         }
  53         memset(&nargs, 0, sizeof(nargs));
  54         nargs.nulla_target = __UNCONST(what);
  55         if (rump_sys_mount(MOUNT_NULL, mp, flags, &nargs, sizeof(nargs)) == -1)
  56                 atf_tc_fail_errno("could not mount nullfs");
  57 }
  58
  59 ATF_TC(nullrevoke);
  60 ATF_TC_HEAD(nullrevoke, tc)
  61 {
  62         atf_tc_set_md_var(tc, "descr", "null mount ptyfs and revoke");
  63 }
  64
  65 ATF_TC_BODY(nullrevoke, tc)
  66 {
  67         char path[MAXPATHLEN];
  68         struct ptmget ptg;
  69         int ptm;
  70
  71         rump_init();
  72
  73         /*
  74          * mount /dev/pts
  75          */
  76         mountptyfs("/dev/pts", 0);
  77
  78         /*
  79          * null mount /dev/pts to /null/dev/pts
  80          */
  81         if (rump_sys_mkdir("/null", 0777) == -1) {
  82                 if (errno != EEXIST)
  83                         atf_tc_fail_errno("null create /null");
  84         }
  85         if (rump_sys_mkdir("/null/dev", 0777) == -1) {
  86                 if (errno != EEXIST)
  87                         atf_tc_fail_errno("null create /null/dev");
  88         }
  89
  90         mountnull("/dev/pts", "/null/dev/pts", 0);
  91
  92         /*
  93          * get slave/master pair.
  94          */
  95         ptm = rump_sys_open("/dev/ptm", O_RDWR);
  96         if (rump_sys_ioctl(ptm, TIOCPTMGET, &ptg) == -1)
  97                 atf_tc_fail_errno("get pty");
  98
  99         /*
 100          * Build nullfs path to slave.
 101          */
 102         strcpy(path, "/null");
 103         strcat(path, ptg.sn);
 104
 105         /*
 106          * Open slave tty via nullfs.
 107          */
 108         if (rump_sys_open(path, O_RDWR) == -1)
 109                 atf_tc_fail_errno("slave null open");
 110
 111         /*
 112          * Close slave opened with /dev/ptm.  Need purely non-null refs to it.
 113          */
 114         rump_sys_close(ptg.sfd);
 115
 116         /* revoke slave tty. */
 117         rump_sys_revoke(path);
 118
 119         /* done */
 120 }
 121
 122 ATF_TP_ADD_TCS(tp)
 123 {
 124
 125         ATF_TP_ADD_TC(tp, nullrevoke);
 126
 127         return atf_no_error();
 128 }