1 /* $NetBSD: t_nullpts.c,v 1.6 2017/01/13 21:30:40 christos 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
mountptyfs(const char * mp,int flags)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
mountnull(const char * what,const char * mp,int flags)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);
ATF_TC_HEAD(nullrevoke,tc)60 ATF_TC_HEAD(nullrevoke, tc)
61 {
62 atf_tc_set_md_var(tc, "descr", "null mount ptyfs and revoke");
63 }
64
ATF_TC_BODY(nullrevoke,tc)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
ATF_TP_ADD_TCS(tp)122 ATF_TP_ADD_TCS(tp)
123 {
124
125 ATF_TP_ADD_TC(tp, nullrevoke);
126
127 return atf_no_error();
128 }
129