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1227625a SP |
1 | /* |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
b45f51d6 | 4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 |
df9ae507 | 5 | * Stelian Pop <pop@cybercable.fr>, 1999 |
1227625a SP |
6 | */ |
7 | ||
8 | /* | |
9 | * Copyright (c) 1983, 1993 | |
10 | * The Regents of the University of California. All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. All advertising materials mentioning features or use of this software | |
21 | * must display the following acknowledgement: | |
22 | * This product includes software developed by the University of | |
23 | * California, Berkeley and its contributors. | |
24 | * 4. Neither the name of the University nor the names of its contributors | |
25 | * may be used to endorse or promote products derived from this software | |
26 | * without specific prior written permission. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 | * SUCH DAMAGE. | |
39 | */ | |
40 | ||
df9ae507 SP |
41 | #ifndef lint |
42 | static const char rcsid[] = | |
43 | "$Id: rmt.c,v 1.6 1999/10/13 09:57:22 stelian Exp $"; | |
44 | #endif /* not linux */ | |
45 | ||
1227625a SP |
46 | /* |
47 | * rmt | |
48 | */ | |
49 | #include <sys/types.h> | |
50 | #include <sys/socket.h> | |
51 | #include <sys/mtio.h> | |
52 | #include <errno.h> | |
53 | #include <fcntl.h> | |
54 | #include <sgtty.h> | |
55 | #include <stdio.h> | |
56 | #include <stdlib.h> | |
57 | #include <string.h> | |
58 | #include <unistd.h> | |
59 | ||
ddd2ef55 SP |
60 | #ifdef __linux__ |
61 | #include <linux/ext2_fs.h> | |
62 | #include <ext2fs/ext2fs.h> | |
63 | #include <bsdcompat.h> | |
64 | #endif | |
65 | ||
1227625a SP |
66 | int tape = -1; |
67 | ||
68 | char *record; | |
69 | int maxrecsize = -1; | |
70 | ||
71 | #define SSIZE 64 | |
72 | char device[SSIZE]; | |
8d4197bb | 73 | char count[SSIZE], filemode[SSIZE], pos[SSIZE], op[SSIZE]; |
1227625a SP |
74 | |
75 | char resp[BUFSIZ]; | |
76 | ||
77 | FILE *debug; | |
78 | #define DEBUG(f) if (debug) fprintf(debug, f) | |
79 | #define DEBUG1(f,a) if (debug) fprintf(debug, f, a) | |
80 | #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) | |
81 | ||
82 | char *checkbuf __P((char *, int)); | |
83 | void error __P((int)); | |
84 | void getstring __P((char *)); | |
85 | ||
86 | int | |
ddd2ef55 | 87 | main(int argc, char *argv[]) |
1227625a | 88 | { |
ddd2ef55 | 89 | int rval = 0; |
1227625a SP |
90 | char c; |
91 | int n, i, cc; | |
92 | ||
93 | argc--, argv++; | |
94 | if (argc > 0) { | |
95 | debug = fopen(*argv, "w"); | |
96 | if (debug == 0) | |
97 | exit(1); | |
98 | (void)setbuf(debug, (char *)0); | |
99 | } | |
100 | top: | |
101 | errno = 0; | |
102 | rval = 0; | |
103 | if (read(0, &c, 1) != 1) | |
104 | exit(0); | |
105 | switch (c) { | |
106 | ||
107 | case 'O': | |
108 | if (tape >= 0) | |
109 | (void) close(tape); | |
110 | getstring(device); | |
8d4197bb SP |
111 | getstring(filemode); |
112 | DEBUG2("rmtd: O %s %s\n", device, filemode); | |
b45f51d6 SP |
113 | /* |
114 | * XXX the rmt protocol does not provide a means to | |
115 | * specify the permission bits; allow rw for everyone, | |
116 | * as modified by the users umask | |
117 | */ | |
8d4197bb | 118 | tape = open(device, atoi(filemode), 0666); |
1227625a SP |
119 | if (tape < 0) |
120 | goto ioerror; | |
121 | goto respond; | |
122 | ||
123 | case 'C': | |
124 | DEBUG("rmtd: C\n"); | |
125 | getstring(device); /* discard */ | |
126 | if (close(tape) < 0) | |
127 | goto ioerror; | |
128 | tape = -1; | |
129 | goto respond; | |
130 | ||
131 | case 'L': | |
132 | getstring(count); | |
133 | getstring(pos); | |
134 | DEBUG2("rmtd: L %s %s\n", count, pos); | |
135 | rval = lseek(tape, (off_t)atol(count), atoi(pos)); | |
136 | if (rval < 0) | |
137 | goto ioerror; | |
138 | goto respond; | |
139 | ||
140 | case 'W': | |
141 | getstring(count); | |
142 | n = atoi(count); | |
143 | DEBUG1("rmtd: W %s\n", count); | |
144 | record = checkbuf(record, n); | |
145 | for (i = 0; i < n; i += cc) { | |
146 | cc = read(0, &record[i], n - i); | |
147 | if (cc <= 0) { | |
148 | DEBUG("rmtd: premature eof\n"); | |
149 | exit(2); | |
150 | } | |
151 | } | |
152 | rval = write(tape, record, n); | |
153 | if (rval < 0) | |
154 | goto ioerror; | |
155 | goto respond; | |
156 | ||
157 | case 'R': | |
158 | getstring(count); | |
159 | DEBUG1("rmtd: R %s\n", count); | |
160 | n = atoi(count); | |
161 | record = checkbuf(record, n); | |
162 | rval = read(tape, record, n); | |
163 | if (rval < 0) | |
164 | goto ioerror; | |
165 | (void)sprintf(resp, "A%d\n", rval); | |
166 | (void)write(1, resp, strlen(resp)); | |
167 | (void)write(1, record, rval); | |
168 | goto top; | |
169 | ||
170 | case 'I': | |
171 | getstring(op); | |
172 | getstring(count); | |
173 | DEBUG2("rmtd: I %s %s\n", op, count); | |
174 | { struct mtop mtop; | |
175 | mtop.mt_op = atoi(op); | |
176 | mtop.mt_count = atoi(count); | |
177 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
178 | goto ioerror; | |
179 | rval = mtop.mt_count; | |
180 | } | |
181 | goto respond; | |
182 | ||
183 | case 'S': /* status */ | |
184 | DEBUG("rmtd: S\n"); | |
185 | { struct mtget mtget; | |
186 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
187 | goto ioerror; | |
188 | rval = sizeof (mtget); | |
189 | (void)sprintf(resp, "A%d\n", rval); | |
190 | (void)write(1, resp, strlen(resp)); | |
191 | (void)write(1, (char *)&mtget, sizeof (mtget)); | |
192 | goto top; | |
193 | } | |
194 | ||
b45f51d6 SP |
195 | case 'V': /* version */ |
196 | getstring(op); | |
197 | DEBUG1("rmtd: V %s\n", op); | |
198 | rval = 2; | |
199 | goto respond; | |
200 | ||
1227625a SP |
201 | default: |
202 | DEBUG1("rmtd: garbage command %c\n", c); | |
203 | exit(3); | |
204 | } | |
205 | respond: | |
206 | DEBUG1("rmtd: A %d\n", rval); | |
207 | (void)sprintf(resp, "A%d\n", rval); | |
208 | (void)write(1, resp, strlen(resp)); | |
209 | goto top; | |
210 | ioerror: | |
211 | error(errno); | |
212 | goto top; | |
213 | } | |
214 | ||
ddd2ef55 | 215 | void getstring(char *bp) |
1227625a SP |
216 | { |
217 | int i; | |
218 | char *cp = bp; | |
219 | ||
220 | for (i = 0; i < SSIZE; i++) { | |
221 | if (read(0, cp+i, 1) != 1) | |
222 | exit(0); | |
223 | if (cp[i] == '\n') | |
224 | break; | |
225 | } | |
226 | cp[i] = '\0'; | |
227 | } | |
228 | ||
229 | char * | |
ddd2ef55 | 230 | checkbuf(char *record, int size) |
1227625a SP |
231 | { |
232 | ||
233 | if (size <= maxrecsize) | |
234 | return (record); | |
235 | if (record != 0) | |
236 | free(record); | |
237 | record = malloc(size); | |
238 | if (record == 0) { | |
239 | DEBUG("rmtd: cannot allocate buffer space\n"); | |
240 | exit(4); | |
241 | } | |
242 | maxrecsize = size; | |
243 | while (size > 1024 && | |
244 | setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) | |
245 | size -= 1024; | |
246 | return (record); | |
247 | } | |
248 | ||
249 | void | |
ddd2ef55 | 250 | error(int num) |
1227625a SP |
251 | { |
252 | ||
253 | DEBUG2("rmtd: E %d (%s)\n", num, strerror(num)); | |
b45f51d6 | 254 | (void)snprintf(resp, sizeof(resp), "E%d\n%s\n", num, strerror(num)); |
1227625a SP |
255 | (void)write(1, resp, strlen(resp)); |
256 | } |