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 } 129