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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | char copyright[] = | |
36 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)rmt.c 5.6 (Berkeley) 6/1/90"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | /* | |
45 | * rmt | |
46 | */ | |
47 | #include <stdio.h> | |
48 | #include <sgtty.h> | |
49 | #include <sys/types.h> | |
50 | #include <sys/socket.h> | |
51 | #include <sys/mtio.h> | |
52 | #include <errno.h> | |
53 | #include <string.h> | |
54 | ||
55 | int tape = -1; | |
56 | ||
57 | char *record; | |
58 | int maxrecsize = -1; | |
59 | char *checkbuf(); | |
60 | ||
61 | #define SSIZE 64 | |
62 | char device[SSIZE]; | |
63 | char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE]; | |
64 | ||
65 | char resp[BUFSIZ]; | |
66 | ||
67 | long lseek(); | |
68 | ||
69 | FILE *debug; | |
70 | #define DEBUG(f) if (debug) fprintf(debug, f) | |
71 | #define DEBUG1(f,a) if (debug) fprintf(debug, f, a) | |
72 | #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) | |
73 | ||
74 | main(argc, argv) | |
75 | int argc; | |
76 | char **argv; | |
77 | { | |
78 | int rval; | |
79 | char c; | |
80 | int n, i, cc; | |
81 | ||
82 | argc--, argv++; | |
83 | if (argc > 0) { | |
84 | debug = fopen(*argv, "w"); | |
85 | if (debug == 0) | |
86 | exit(1); | |
87 | (void) setbuf(debug, (char *)0); | |
88 | } | |
89 | top: | |
90 | errno = 0; | |
91 | rval = 0; | |
92 | if (read(0, &c, 1) != 1) | |
93 | exit(0); | |
94 | switch (c) { | |
95 | ||
96 | case 'O': | |
97 | if (tape >= 0) | |
98 | (void) close(tape); | |
99 | getstring(device); getstring(mode); | |
100 | DEBUG2("rmtd: O %s %s\n", device, mode); | |
101 | tape = open(device, atoi(mode)); | |
102 | if (tape < 0) | |
103 | goto ioerror; | |
104 | goto respond; | |
105 | ||
106 | case 'C': | |
107 | DEBUG("rmtd: C\n"); | |
108 | getstring(device); /* discard */ | |
109 | if (close(tape) < 0) | |
110 | goto ioerror; | |
111 | tape = -1; | |
112 | goto respond; | |
113 | ||
114 | case 'L': | |
115 | getstring(count); getstring(pos); | |
116 | DEBUG2("rmtd: L %s %s\n", count, pos); | |
117 | rval = lseek(tape, (long) atoi(count), atoi(pos)); | |
118 | if (rval < 0) | |
119 | goto ioerror; | |
120 | goto respond; | |
121 | ||
122 | case 'W': | |
123 | getstring(count); | |
124 | n = atoi(count); | |
125 | DEBUG1("rmtd: W %s\n", count); | |
126 | record = checkbuf(record, n); | |
127 | for (i = 0; i < n; i += cc) { | |
128 | cc = read(0, &record[i], n - i); | |
129 | if (cc <= 0) { | |
130 | DEBUG("rmtd: premature eof\n"); | |
131 | exit(2); | |
132 | } | |
133 | } | |
134 | rval = write(tape, record, n); | |
135 | if (rval < 0) | |
136 | goto ioerror; | |
137 | goto respond; | |
138 | ||
139 | case 'R': | |
140 | getstring(count); | |
141 | DEBUG1("rmtd: R %s\n", count); | |
142 | n = atoi(count); | |
143 | record = checkbuf(record, n); | |
144 | rval = read(tape, record, n); | |
145 | if (rval < 0) | |
146 | goto ioerror; | |
147 | (void) sprintf(resp, "A%d\n", rval); | |
148 | (void) write(1, resp, strlen(resp)); | |
149 | (void) write(1, record, rval); | |
150 | goto top; | |
151 | ||
152 | case 'I': | |
153 | getstring(op); getstring(count); | |
154 | DEBUG2("rmtd: I %s %s\n", op, count); | |
155 | { struct mtop mtop; | |
156 | mtop.mt_op = atoi(op); | |
157 | mtop.mt_count = atoi(count); | |
158 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
159 | goto ioerror; | |
160 | rval = mtop.mt_count; | |
161 | } | |
162 | goto respond; | |
163 | ||
164 | case 'S': /* status */ | |
165 | DEBUG("rmtd: S\n"); | |
166 | { struct mtget mtget; | |
167 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
168 | goto ioerror; | |
169 | rval = sizeof (mtget); | |
170 | (void) sprintf(resp, "A%d\n", rval); | |
171 | (void) write(1, resp, strlen(resp)); | |
172 | (void) write(1, (char *)&mtget, sizeof (mtget)); | |
173 | goto top; | |
174 | } | |
175 | ||
176 | default: | |
177 | DEBUG1("rmtd: garbage command %c\n", c); | |
178 | exit(3); | |
179 | } | |
180 | respond: | |
181 | DEBUG1("rmtd: A %d\n", rval); | |
182 | (void) sprintf(resp, "A%d\n", rval); | |
183 | (void) write(1, resp, strlen(resp)); | |
184 | goto top; | |
185 | ioerror: | |
186 | error(errno); | |
187 | goto top; | |
188 | } | |
189 | ||
190 | getstring(bp) | |
191 | char *bp; | |
192 | { | |
193 | int i; | |
194 | char *cp = bp; | |
195 | ||
196 | for (i = 0; i < SSIZE; i++) { | |
197 | if (read(0, cp+i, 1) != 1) | |
198 | exit(0); | |
199 | if (cp[i] == '\n') | |
200 | break; | |
201 | } | |
202 | cp[i] = '\0'; | |
203 | } | |
204 | ||
205 | char * | |
206 | checkbuf(record, size) | |
207 | char *record; | |
208 | int size; | |
209 | { | |
210 | extern char *malloc(); | |
211 | ||
212 | if (size <= maxrecsize) | |
213 | return (record); | |
214 | if (record != 0) | |
215 | free(record); | |
216 | record = malloc(size); | |
217 | if (record == 0) { | |
218 | DEBUG("rmtd: cannot allocate buffer space\n"); | |
219 | exit(4); | |
220 | } | |
221 | maxrecsize = size; | |
222 | while (size > 1024 && | |
223 | setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) | |
224 | size -= 1024; | |
225 | return (record); | |
226 | } | |
227 | ||
228 | error(num) | |
229 | int num; | |
230 | { | |
231 | ||
232 | DEBUG2("rmtd: E %d (%s)\n", num, strerror(num)); | |
233 | (void) sprintf(resp, "E%d\n%s\n", num, strerror(num)); | |
234 | (void) write(1, resp, strlen(resp)); | |
235 | } |