Commit | Line | Data |
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8c5eec2f DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
a4fb2c81 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
8c5eec2f DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
20 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
21 | All rights reserved.\n"; | |
a4fb2c81 | 22 | #endif /* not lint */ |
8c5eec2f | 23 | |
ca880174 | 24 | #ifndef lint |
ca67e7b4 | 25 | static char sccsid[] = "@(#)rmt.c 5.4 (Berkeley) 6/29/88"; |
a4fb2c81 | 26 | #endif /* not lint */ |
ca880174 BJ |
27 | |
28 | /* | |
29 | * rmt | |
30 | */ | |
31 | #include <stdio.h> | |
32 | #include <sgtty.h> | |
33 | #include <sys/types.h> | |
2622d866 | 34 | #include <sys/socket.h> |
ca880174 BJ |
35 | #include <sys/mtio.h> |
36 | #include <errno.h> | |
37 | ||
38 | int tape = -1; | |
39 | ||
d2f2b385 KM |
40 | char *record; |
41 | int maxrecsize = -1; | |
42 | char *checkbuf(); | |
ca880174 BJ |
43 | |
44 | #define SSIZE 64 | |
45 | char device[SSIZE]; | |
46 | char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE]; | |
47 | ||
48 | extern errno; | |
49 | char *sys_errlist[]; | |
50 | char resp[BUFSIZ]; | |
51 | ||
ca880174 BJ |
52 | long lseek(); |
53 | ||
54 | FILE *debug; | |
70cb830c SL |
55 | #define DEBUG(f) if (debug) fprintf(debug, f) |
56 | #define DEBUG1(f,a) if (debug) fprintf(debug, f, a) | |
57 | #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) | |
ca880174 BJ |
58 | |
59 | main(argc, argv) | |
60 | int argc; | |
61 | char **argv; | |
62 | { | |
09b7833f | 63 | int rval; |
ca880174 BJ |
64 | char c; |
65 | int n, i, cc; | |
66 | ||
67 | argc--, argv++; | |
68 | if (argc > 0) { | |
69 | debug = fopen(*argv, "w"); | |
70 | if (debug == 0) | |
71 | exit(1); | |
72 | (void) setbuf(debug, (char *)0); | |
73 | } | |
74 | top: | |
75 | errno = 0; | |
76 | rval = 0; | |
77 | if (read(0, &c, 1) != 1) | |
78 | exit(0); | |
79 | switch (c) { | |
80 | ||
81 | case 'O': | |
82 | if (tape >= 0) | |
83 | (void) close(tape); | |
70cb830c SL |
84 | getstring(device); getstring(mode); |
85 | DEBUG2("rmtd: O %s %s\n", device, mode); | |
ca880174 BJ |
86 | tape = open(device, atoi(mode)); |
87 | if (tape < 0) | |
88 | goto ioerror; | |
beb54976 | 89 | goto respond; |
ca880174 BJ |
90 | |
91 | case 'C': | |
70cb830c SL |
92 | DEBUG("rmtd: C\n"); |
93 | getstring(device); /* discard */ | |
ca880174 BJ |
94 | if (close(tape) < 0) |
95 | goto ioerror; | |
96 | tape = -1; | |
beb54976 | 97 | goto respond; |
ca880174 BJ |
98 | |
99 | case 'L': | |
70cb830c SL |
100 | getstring(count); getstring(pos); |
101 | DEBUG2("rmtd: L %s %s\n", count, pos); | |
ca880174 BJ |
102 | rval = lseek(tape, (long) atoi(count), atoi(pos)); |
103 | if (rval < 0) | |
104 | goto ioerror; | |
beb54976 | 105 | goto respond; |
ca880174 BJ |
106 | |
107 | case 'W': | |
70cb830c | 108 | getstring(count); |
ca880174 | 109 | n = atoi(count); |
70cb830c | 110 | DEBUG1("rmtd: W %s\n", count); |
d2f2b385 | 111 | record = checkbuf(record, n); |
ca880174 BJ |
112 | for (i = 0; i < n; i += cc) { |
113 | cc = read(0, &record[i], n - i); | |
114 | if (cc <= 0) { | |
70cb830c | 115 | DEBUG("rmtd: premature eof\n"); |
d2f2b385 | 116 | exit(2); |
ca880174 BJ |
117 | } |
118 | } | |
119 | rval = write(tape, record, n); | |
120 | if (rval < 0) | |
121 | goto ioerror; | |
beb54976 | 122 | goto respond; |
ca880174 BJ |
123 | |
124 | case 'R': | |
70cb830c SL |
125 | getstring(count); |
126 | DEBUG1("rmtd: R %s\n", count); | |
ca880174 | 127 | n = atoi(count); |
d2f2b385 | 128 | record = checkbuf(record, n); |
ca880174 BJ |
129 | rval = read(tape, record, n); |
130 | if (rval < 0) | |
131 | goto ioerror; | |
beb54976 KM |
132 | (void) sprintf(resp, "A%d\n", rval); |
133 | (void) write(1, resp, strlen(resp)); | |
134 | (void) write(1, record, rval); | |
135 | goto top; | |
ca880174 BJ |
136 | |
137 | case 'I': | |
70cb830c SL |
138 | getstring(op); getstring(count); |
139 | DEBUG2("rmtd: I %s %s\n", op, count); | |
ca880174 BJ |
140 | { struct mtop mtop; |
141 | mtop.mt_op = atoi(op); | |
142 | mtop.mt_count = atoi(count); | |
143 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
144 | goto ioerror; | |
145 | rval = mtop.mt_count; | |
146 | } | |
beb54976 | 147 | goto respond; |
ca880174 BJ |
148 | |
149 | case 'S': /* status */ | |
70cb830c | 150 | DEBUG("rmtd: S\n"); |
ca880174 BJ |
151 | { struct mtget mtget; |
152 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
153 | goto ioerror; | |
154 | rval = sizeof (mtget); | |
40b76363 RC |
155 | (void) sprintf(resp, "A%d\n", rval); |
156 | (void) write(1, resp, strlen(resp)); | |
ca880174 | 157 | (void) write(1, (char *)&mtget, sizeof (mtget)); |
40b76363 | 158 | goto top; |
ca880174 BJ |
159 | } |
160 | ||
161 | default: | |
70cb830c | 162 | DEBUG1("rmtd: garbage command %c\n", c); |
d2f2b385 | 163 | exit(3); |
ca880174 | 164 | } |
beb54976 | 165 | respond: |
70cb830c | 166 | DEBUG1("rmtd: A %d\n", rval); |
ca880174 BJ |
167 | (void) sprintf(resp, "A%d\n", rval); |
168 | (void) write(1, resp, strlen(resp)); | |
169 | goto top; | |
170 | ioerror: | |
171 | error(errno); | |
172 | goto top; | |
173 | } | |
174 | ||
70cb830c | 175 | getstring(bp) |
ca880174 BJ |
176 | char *bp; |
177 | { | |
178 | int i; | |
179 | char *cp = bp; | |
180 | ||
181 | for (i = 0; i < SSIZE; i++) { | |
182 | if (read(0, cp+i, 1) != 1) | |
183 | exit(0); | |
184 | if (cp[i] == '\n') | |
185 | break; | |
186 | } | |
187 | cp[i] = '\0'; | |
188 | } | |
189 | ||
d2f2b385 KM |
190 | char * |
191 | checkbuf(record, size) | |
192 | char *record; | |
193 | int size; | |
194 | { | |
195 | extern char *malloc(); | |
196 | ||
197 | if (size <= maxrecsize) | |
198 | return (record); | |
199 | if (record != 0) | |
200 | free(record); | |
201 | record = malloc(size); | |
202 | if (record == 0) { | |
203 | DEBUG("rmtd: cannot allocate buffer space\n"); | |
204 | exit(4); | |
205 | } | |
eacc5e23 | 206 | maxrecsize = size; |
c18a7664 KM |
207 | while (size > 1024 && |
208 | setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) | |
209 | size -= 1024; | |
d2f2b385 KM |
210 | return (record); |
211 | } | |
212 | ||
ca880174 BJ |
213 | error(num) |
214 | int num; | |
215 | { | |
216 | ||
70cb830c | 217 | DEBUG2("rmtd: E %d (%s)\n", num, sys_errlist[num]); |
ca880174 BJ |
218 | (void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]); |
219 | (void) write(1, resp, strlen (resp)); | |
220 | } |