Commit | Line | Data |
---|---|---|
8c5eec2f DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
ca880174 | 13 | #ifndef lint |
9bd38ba8 | 14 | static char sccsid[] = "@(#)rmt.c 5.3 (Berkeley) %G%"; |
8c5eec2f | 15 | #endif not lint |
ca880174 BJ |
16 | |
17 | /* | |
18 | * rmt | |
19 | */ | |
20 | #include <stdio.h> | |
21 | #include <sgtty.h> | |
22 | #include <sys/types.h> | |
2622d866 | 23 | #include <sys/socket.h> |
ca880174 BJ |
24 | #include <sys/mtio.h> |
25 | #include <errno.h> | |
26 | ||
27 | int tape = -1; | |
28 | ||
d2f2b385 KM |
29 | char *record; |
30 | int maxrecsize = -1; | |
31 | char *checkbuf(); | |
ca880174 BJ |
32 | |
33 | #define SSIZE 64 | |
34 | char device[SSIZE]; | |
35 | char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE]; | |
36 | ||
37 | extern errno; | |
38 | char *sys_errlist[]; | |
39 | char resp[BUFSIZ]; | |
40 | ||
ca880174 BJ |
41 | long lseek(); |
42 | ||
43 | FILE *debug; | |
70cb830c SL |
44 | #define DEBUG(f) if (debug) fprintf(debug, f) |
45 | #define DEBUG1(f,a) if (debug) fprintf(debug, f, a) | |
46 | #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) | |
ca880174 BJ |
47 | |
48 | main(argc, argv) | |
49 | int argc; | |
50 | char **argv; | |
51 | { | |
09b7833f | 52 | int rval; |
ca880174 BJ |
53 | char c; |
54 | int n, i, cc; | |
55 | ||
56 | argc--, argv++; | |
57 | if (argc > 0) { | |
58 | debug = fopen(*argv, "w"); | |
59 | if (debug == 0) | |
60 | exit(1); | |
61 | (void) setbuf(debug, (char *)0); | |
62 | } | |
63 | top: | |
64 | errno = 0; | |
65 | rval = 0; | |
66 | if (read(0, &c, 1) != 1) | |
67 | exit(0); | |
68 | switch (c) { | |
69 | ||
70 | case 'O': | |
71 | if (tape >= 0) | |
72 | (void) close(tape); | |
70cb830c SL |
73 | getstring(device); getstring(mode); |
74 | DEBUG2("rmtd: O %s %s\n", device, mode); | |
ca880174 BJ |
75 | tape = open(device, atoi(mode)); |
76 | if (tape < 0) | |
77 | goto ioerror; | |
beb54976 | 78 | goto respond; |
ca880174 BJ |
79 | |
80 | case 'C': | |
70cb830c SL |
81 | DEBUG("rmtd: C\n"); |
82 | getstring(device); /* discard */ | |
ca880174 BJ |
83 | if (close(tape) < 0) |
84 | goto ioerror; | |
85 | tape = -1; | |
beb54976 | 86 | goto respond; |
ca880174 BJ |
87 | |
88 | case 'L': | |
70cb830c SL |
89 | getstring(count); getstring(pos); |
90 | DEBUG2("rmtd: L %s %s\n", count, pos); | |
ca880174 BJ |
91 | rval = lseek(tape, (long) atoi(count), atoi(pos)); |
92 | if (rval < 0) | |
93 | goto ioerror; | |
beb54976 | 94 | goto respond; |
ca880174 BJ |
95 | |
96 | case 'W': | |
70cb830c | 97 | getstring(count); |
ca880174 | 98 | n = atoi(count); |
70cb830c | 99 | DEBUG1("rmtd: W %s\n", count); |
d2f2b385 | 100 | record = checkbuf(record, n); |
ca880174 BJ |
101 | for (i = 0; i < n; i += cc) { |
102 | cc = read(0, &record[i], n - i); | |
103 | if (cc <= 0) { | |
70cb830c | 104 | DEBUG("rmtd: premature eof\n"); |
d2f2b385 | 105 | exit(2); |
ca880174 BJ |
106 | } |
107 | } | |
108 | rval = write(tape, record, n); | |
109 | if (rval < 0) | |
110 | goto ioerror; | |
beb54976 | 111 | goto respond; |
ca880174 BJ |
112 | |
113 | case 'R': | |
70cb830c SL |
114 | getstring(count); |
115 | DEBUG1("rmtd: R %s\n", count); | |
ca880174 | 116 | n = atoi(count); |
d2f2b385 | 117 | record = checkbuf(record, n); |
ca880174 BJ |
118 | rval = read(tape, record, n); |
119 | if (rval < 0) | |
120 | goto ioerror; | |
beb54976 KM |
121 | (void) sprintf(resp, "A%d\n", rval); |
122 | (void) write(1, resp, strlen(resp)); | |
123 | (void) write(1, record, rval); | |
124 | goto top; | |
ca880174 BJ |
125 | |
126 | case 'I': | |
70cb830c SL |
127 | getstring(op); getstring(count); |
128 | DEBUG2("rmtd: I %s %s\n", op, count); | |
ca880174 BJ |
129 | { struct mtop mtop; |
130 | mtop.mt_op = atoi(op); | |
131 | mtop.mt_count = atoi(count); | |
132 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
133 | goto ioerror; | |
134 | rval = mtop.mt_count; | |
135 | } | |
beb54976 | 136 | goto respond; |
ca880174 BJ |
137 | |
138 | case 'S': /* status */ | |
70cb830c | 139 | DEBUG("rmtd: S\n"); |
ca880174 BJ |
140 | { struct mtget mtget; |
141 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
142 | goto ioerror; | |
143 | rval = sizeof (mtget); | |
40b76363 RC |
144 | (void) sprintf(resp, "A%d\n", rval); |
145 | (void) write(1, resp, strlen(resp)); | |
ca880174 | 146 | (void) write(1, (char *)&mtget, sizeof (mtget)); |
40b76363 | 147 | goto top; |
ca880174 BJ |
148 | } |
149 | ||
150 | default: | |
70cb830c | 151 | DEBUG1("rmtd: garbage command %c\n", c); |
d2f2b385 | 152 | exit(3); |
ca880174 | 153 | } |
beb54976 | 154 | respond: |
70cb830c | 155 | DEBUG1("rmtd: A %d\n", rval); |
ca880174 BJ |
156 | (void) sprintf(resp, "A%d\n", rval); |
157 | (void) write(1, resp, strlen(resp)); | |
158 | goto top; | |
159 | ioerror: | |
160 | error(errno); | |
161 | goto top; | |
162 | } | |
163 | ||
70cb830c | 164 | getstring(bp) |
ca880174 BJ |
165 | char *bp; |
166 | { | |
167 | int i; | |
168 | char *cp = bp; | |
169 | ||
170 | for (i = 0; i < SSIZE; i++) { | |
171 | if (read(0, cp+i, 1) != 1) | |
172 | exit(0); | |
173 | if (cp[i] == '\n') | |
174 | break; | |
175 | } | |
176 | cp[i] = '\0'; | |
177 | } | |
178 | ||
d2f2b385 KM |
179 | char * |
180 | checkbuf(record, size) | |
181 | char *record; | |
182 | int size; | |
183 | { | |
184 | extern char *malloc(); | |
185 | ||
186 | if (size <= maxrecsize) | |
187 | return (record); | |
188 | if (record != 0) | |
189 | free(record); | |
190 | record = malloc(size); | |
191 | if (record == 0) { | |
192 | DEBUG("rmtd: cannot allocate buffer space\n"); | |
193 | exit(4); | |
194 | } | |
eacc5e23 | 195 | maxrecsize = size; |
c18a7664 KM |
196 | while (size > 1024 && |
197 | setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) | |
198 | size -= 1024; | |
d2f2b385 KM |
199 | return (record); |
200 | } | |
201 | ||
ca880174 BJ |
202 | error(num) |
203 | int num; | |
204 | { | |
205 | ||
70cb830c | 206 | DEBUG2("rmtd: E %d (%s)\n", num, sys_errlist[num]); |
ca880174 BJ |
207 | (void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]); |
208 | (void) write(1, resp, strlen (resp)); | |
209 | } |