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 |
eacc5e23 | 14 | static char sccsid[] = "@(#)rmt.c 5.2 (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 | ||
41 | char *sprintf(); | |
42 | long lseek(); | |
43 | ||
44 | FILE *debug; | |
70cb830c SL |
45 | #define DEBUG(f) if (debug) fprintf(debug, f) |
46 | #define DEBUG1(f,a) if (debug) fprintf(debug, f, a) | |
47 | #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2) | |
ca880174 BJ |
48 | |
49 | main(argc, argv) | |
50 | int argc; | |
51 | char **argv; | |
52 | { | |
09b7833f | 53 | int rval; |
ca880174 BJ |
54 | char c; |
55 | int n, i, cc; | |
56 | ||
57 | argc--, argv++; | |
58 | if (argc > 0) { | |
59 | debug = fopen(*argv, "w"); | |
60 | if (debug == 0) | |
61 | exit(1); | |
62 | (void) setbuf(debug, (char *)0); | |
63 | } | |
64 | top: | |
65 | errno = 0; | |
66 | rval = 0; | |
67 | if (read(0, &c, 1) != 1) | |
68 | exit(0); | |
69 | switch (c) { | |
70 | ||
71 | case 'O': | |
72 | if (tape >= 0) | |
73 | (void) close(tape); | |
70cb830c SL |
74 | getstring(device); getstring(mode); |
75 | DEBUG2("rmtd: O %s %s\n", device, mode); | |
ca880174 BJ |
76 | tape = open(device, atoi(mode)); |
77 | if (tape < 0) | |
78 | goto ioerror; | |
beb54976 | 79 | goto respond; |
ca880174 BJ |
80 | |
81 | case 'C': | |
70cb830c SL |
82 | DEBUG("rmtd: C\n"); |
83 | getstring(device); /* discard */ | |
ca880174 BJ |
84 | if (close(tape) < 0) |
85 | goto ioerror; | |
86 | tape = -1; | |
beb54976 | 87 | goto respond; |
ca880174 BJ |
88 | |
89 | case 'L': | |
70cb830c SL |
90 | getstring(count); getstring(pos); |
91 | DEBUG2("rmtd: L %s %s\n", count, pos); | |
ca880174 BJ |
92 | rval = lseek(tape, (long) atoi(count), atoi(pos)); |
93 | if (rval < 0) | |
94 | goto ioerror; | |
beb54976 | 95 | goto respond; |
ca880174 BJ |
96 | |
97 | case 'W': | |
70cb830c | 98 | getstring(count); |
ca880174 | 99 | n = atoi(count); |
70cb830c | 100 | DEBUG1("rmtd: W %s\n", count); |
d2f2b385 | 101 | record = checkbuf(record, n); |
ca880174 BJ |
102 | for (i = 0; i < n; i += cc) { |
103 | cc = read(0, &record[i], n - i); | |
104 | if (cc <= 0) { | |
70cb830c | 105 | DEBUG("rmtd: premature eof\n"); |
d2f2b385 | 106 | exit(2); |
ca880174 BJ |
107 | } |
108 | } | |
109 | rval = write(tape, record, n); | |
110 | if (rval < 0) | |
111 | goto ioerror; | |
beb54976 | 112 | goto respond; |
ca880174 BJ |
113 | |
114 | case 'R': | |
70cb830c SL |
115 | getstring(count); |
116 | DEBUG1("rmtd: R %s\n", count); | |
ca880174 | 117 | n = atoi(count); |
d2f2b385 | 118 | record = checkbuf(record, n); |
ca880174 BJ |
119 | rval = read(tape, record, n); |
120 | if (rval < 0) | |
121 | goto ioerror; | |
beb54976 KM |
122 | (void) sprintf(resp, "A%d\n", rval); |
123 | (void) write(1, resp, strlen(resp)); | |
124 | (void) write(1, record, rval); | |
125 | goto top; | |
ca880174 BJ |
126 | |
127 | case 'I': | |
70cb830c SL |
128 | getstring(op); getstring(count); |
129 | DEBUG2("rmtd: I %s %s\n", op, count); | |
ca880174 BJ |
130 | { struct mtop mtop; |
131 | mtop.mt_op = atoi(op); | |
132 | mtop.mt_count = atoi(count); | |
133 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
134 | goto ioerror; | |
135 | rval = mtop.mt_count; | |
136 | } | |
beb54976 | 137 | goto respond; |
ca880174 BJ |
138 | |
139 | case 'S': /* status */ | |
70cb830c | 140 | DEBUG("rmtd: S\n"); |
ca880174 BJ |
141 | { struct mtget mtget; |
142 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
143 | goto ioerror; | |
144 | rval = sizeof (mtget); | |
40b76363 RC |
145 | (void) sprintf(resp, "A%d\n", rval); |
146 | (void) write(1, resp, strlen(resp)); | |
ca880174 | 147 | (void) write(1, (char *)&mtget, sizeof (mtget)); |
40b76363 | 148 | goto top; |
ca880174 BJ |
149 | } |
150 | ||
151 | default: | |
70cb830c | 152 | DEBUG1("rmtd: garbage command %c\n", c); |
d2f2b385 | 153 | exit(3); |
ca880174 | 154 | } |
beb54976 | 155 | respond: |
70cb830c | 156 | DEBUG1("rmtd: A %d\n", rval); |
ca880174 BJ |
157 | (void) sprintf(resp, "A%d\n", rval); |
158 | (void) write(1, resp, strlen(resp)); | |
159 | goto top; | |
160 | ioerror: | |
161 | error(errno); | |
162 | goto top; | |
163 | } | |
164 | ||
70cb830c | 165 | getstring(bp) |
ca880174 BJ |
166 | char *bp; |
167 | { | |
168 | int i; | |
169 | char *cp = bp; | |
170 | ||
171 | for (i = 0; i < SSIZE; i++) { | |
172 | if (read(0, cp+i, 1) != 1) | |
173 | exit(0); | |
174 | if (cp[i] == '\n') | |
175 | break; | |
176 | } | |
177 | cp[i] = '\0'; | |
178 | } | |
179 | ||
d2f2b385 KM |
180 | char * |
181 | checkbuf(record, size) | |
182 | char *record; | |
183 | int size; | |
184 | { | |
185 | extern char *malloc(); | |
186 | ||
187 | if (size <= maxrecsize) | |
188 | return (record); | |
189 | if (record != 0) | |
190 | free(record); | |
191 | record = malloc(size); | |
192 | if (record == 0) { | |
193 | DEBUG("rmtd: cannot allocate buffer space\n"); | |
194 | exit(4); | |
195 | } | |
eacc5e23 | 196 | maxrecsize = size; |
c18a7664 KM |
197 | while (size > 1024 && |
198 | setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0) | |
199 | size -= 1024; | |
d2f2b385 KM |
200 | return (record); |
201 | } | |
202 | ||
ca880174 BJ |
203 | error(num) |
204 | int num; | |
205 | { | |
206 | ||
70cb830c | 207 | DEBUG2("rmtd: E %d (%s)\n", num, sys_errlist[num]); |
ca880174 BJ |
208 | (void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]); |
209 | (void) write(1, resp, strlen (resp)); | |
210 | } |