1 /* $NetBSD: sdread.c,v 1.6 2010/03/25 15:00:20 pooka Exp $ */
2
3 /*
4 * Copyright (c) 2009 Antti Kantee. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/types.h>
29 #include <sys/dirent.h>
30 #include <sys/mount.h>
31 #include <sys/dkio.h>
32
33 #include <ufs/ufs/ufsmount.h>
34 #include <msdosfs/msdosfsmount.h>
35 #include <isofs/cd9660/cd9660_mount.h>
36
37 #include <rump/rump.h>
38 #include <rump/rump_syscalls.h>
39
40 #include <err.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 /*
49 * Proof-of-concept program:
50 *
51 * Mount rump file system from device driver stack included in the
52 * rump kernel. Optionally copy a file out of the mounted file system.
53 */
54
55 /* recent -current, appease 5.0 etc. userland */
56 #ifndef DIOCTUR
57 #define DIOCTUR _IOR('d', 128, int)
58 #endif
59
60 static void
waitcd(void)61 waitcd(void)
62 {
63 int fd, val = 0, rounds = 0;
64
65 fd = rump_sys_open("/dev/rcd0d", O_RDWR);
66 if (fd == -1)
67 return;
68
69 do {
70 if (rounds > 0) {
71 if (rounds == 1) {
72 printf("Waiting for CD device to settle ");
73 } else {
74 printf(".");
75 }
76 fflush(stdout);
77 sleep(1);
78 }
79 if (rump_sys_ioctl(fd, DIOCTUR, &val) == -1)
80 err(1, "DIOCTUR");
81 rounds++;
82 } while (val == 0 || rounds >= 30);
83
84 if (!val)
85 printf(" giving up\n");
86 else
87 printf(" done!\n");
88
89 rump_sys_close(fd);
90 }
91
92 int
main(int argc,char * argv[])93 main(int argc, char *argv[])
94 {
95 char buf[2048];
96 struct msdosfs_args args;
97 struct ufs_args uargs;
98 struct iso_args iargs;
99 struct dirent *dp;
100 const char *msg = NULL;
101 int fd, n, fd_h, sverrno;
102 int probeonly = 0;
103
104 if (argc > 1) {
105 if (argc == 2 && strcmp(argv[1], "probe") == 0) {
106 probeonly = 1;
107 } else if (argc != 3) {
108 fprintf(stderr, "usage: a.out [src hostdest]\n");
109 exit(1);
110 }
111 }
112
113 memset(&args, 0, sizeof(args));
114 args.fspec = strdup("/dev/sd0e");
115 args.version = MSDOSFSMNT_VERSION;
116
117 memset(&uargs, 0, sizeof(uargs));
118 uargs.fspec = strdup("/dev/sd0e");
119
120 memset(&iargs, 0, sizeof(iargs));
121 iargs.fspec = strdup("/dev/cd0a");
122
123 if (probeonly)
124 rump_boot_sethowto(RUMP_AB_VERBOSE);
125 rump_init();
126 if (probeonly) {
127 pause();
128 exit(0);
129 }
130
131 if (rump_sys_mkdir("/mp", 0777) == -1)
132 err(1, "mkdir");
133 if (rump_sys_mount(MOUNT_MSDOS, "/mp", MNT_RDONLY,
134 &args, sizeof(args)) == -1) {
135 if (rump_sys_mount(MOUNT_FFS, "/mp", MNT_RDONLY,
136 &uargs, sizeof(uargs)) == -1) {
137 /*
138 * Wait for CD media to settle. In the end,
139 * just try to do it anyway and see if we fail.
140 */
141 waitcd();
142 if (rump_sys_mount(MOUNT_CD9660, "/mp", MNT_RDONLY,
143 &iargs, sizeof(iargs)) == -1) {
144 err(1, "mount");
145 }
146 }
147 }
148
149 fd = rump_sys_open("/mp", O_RDONLY, 0);
150 if (fd == -1) {
151 msg = "open dir";
152 goto out;
153 }
154
155 while ((n = rump_sys_getdents(fd, buf, sizeof(buf))) > 0) {
156 for (dp = (struct dirent *)buf;
157 (char *)dp - buf < n;
158 dp = _DIRENT_NEXT(dp)) {
159 printf("%" PRIu64 ": %s\n", dp->d_fileno, dp->d_name);
160 }
161 }
162 rump_sys_close(fd);
163 if (argc == 1)
164 goto out;
165
166 rump_sys_chdir("/mp");
167 fd = rump_sys_open(argv[1], O_RDONLY, 0);
168 if (fd == -1) {
169 msg = "open fs file";
170 goto out;
171 }
172
173 fd_h = open(argv[2], O_RDWR | O_CREAT, 0777);
174 if (fd_h == -1) {
175 msg = "open host file";
176 goto out;
177 }
178
179 while ((n = rump_sys_read(fd, buf, sizeof(buf))) == sizeof(buf)) {
180 if (write(fd_h, buf, sizeof(buf)) != sizeof(buf)) {
181 msg = "write host file";
182 goto out;
183 }
184 }
185 if (n == -1) {
186 msg = "read fs file";
187 goto out;
188 }
189
190 if (n > 0) {
191 if (write(fd_h, buf, n) == -1)
192 msg = "write tail";
193 }
194
195 out:
196 sverrno = errno;
197 rump_sys_chdir("/");
198 rump_sys_close(fd);
199 close(fd_h);
200 if (rump_sys_unmount("/mp", 0) == -1)
201 err(1, "unmount");
202
203 if (msg) {
204 errno = sverrno;
205 err(1, "%s", msg);
206 }
207
208 return 0;
209 }
210