projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| ca880174 BJ |
1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)rmt.c 4.1 82/04/02"; | |
| 3 | #endif | |
| 4 | ||
| 5 | /* | |
| 6 | * rmt | |
| 7 | */ | |
| 8 | #include <stdio.h> | |
| 9 | #include <sgtty.h> | |
| 10 | #include <sys/types.h> | |
| 11 | #include <sys/mtio.h> | |
| 12 | #include <errno.h> | |
| 13 | ||
| 14 | int tape = -1; | |
| 15 | ||
| 16 | #define MAXRECSIZ (60*1024) | |
| 17 | char record[MAXRECSIZ]; | |
| 18 | ||
| 19 | #define SSIZE 64 | |
| 20 | char device[SSIZE]; | |
| 21 | char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE]; | |
| 22 | ||
| 23 | extern errno; | |
| 24 | char *sys_errlist[]; | |
| 25 | char resp[BUFSIZ]; | |
| 26 | ||
| 27 | char *sprintf(); | |
| 28 | long lseek(); | |
| 29 | ||
| 30 | FILE *debug; | |
| 31 | ||
| 32 | main(argc, argv) | |
| 33 | int argc; | |
| 34 | char **argv; | |
| 35 | { | |
| 36 | long rval; | |
| 37 | char c; | |
| 38 | int n, i, cc; | |
| 39 | ||
| 40 | argc--, argv++; | |
| 41 | if (argc > 0) { | |
| 42 | debug = fopen(*argv, "w"); | |
| 43 | if (debug == 0) | |
| 44 | exit(1); | |
| 45 | (void) setbuf(debug, (char *)0); | |
| 46 | } | |
| 47 | top: | |
| 48 | errno = 0; | |
| 49 | rval = 0; | |
| 50 | if (read(0, &c, 1) != 1) | |
| 51 | exit(0); | |
| 52 | switch (c) { | |
| 53 | ||
| 54 | case 'O': | |
| 55 | if (tape >= 0) | |
| 56 | (void) close(tape); | |
| 57 | gets(device); gets(mode); | |
| 58 | if (debug) fprintf(debug, "rmtd: O %s %s\n", device, mode); | |
| 59 | tape = open(device, atoi(mode)); | |
| 60 | if (tape < 0) | |
| 61 | goto ioerror; | |
| 62 | break; | |
| 63 | ||
| 64 | case 'C': | |
| 65 | if (debug) fprintf(debug, "rmtd: C\n"); | |
| 66 | gets(device); /* discard */ | |
| 67 | if (close(tape) < 0) | |
| 68 | goto ioerror; | |
| 69 | tape = -1; | |
| 70 | break; | |
| 71 | ||
| 72 | case 'L': | |
| 73 | gets(count); gets(pos); | |
| 74 | if (debug) fprintf(debug, "rmtd: L %s %s\n", count, pos); | |
| 75 | rval = lseek(tape, (long) atoi(count), atoi(pos)); | |
| 76 | if (rval < 0) | |
| 77 | goto ioerror; | |
| 78 | break; | |
| 79 | ||
| 80 | case 'W': | |
| 81 | gets(count); | |
| 82 | n = atoi(count); | |
| 83 | if (debug) fprintf(debug, "rmtd: W %s\n", count); | |
| 84 | for (i = 0; i < n; i += cc) { | |
| 85 | cc = read(0, &record[i], n - i); | |
| 86 | if (cc <= 0) { | |
| 87 | if (debug) fprintf(debug, "rmtd: premature eof\n"); | |
| 88 | exit(1); | |
| 89 | } | |
| 90 | } | |
| 91 | rval = write(tape, record, n); | |
| 92 | if (rval < 0) | |
| 93 | goto ioerror; | |
| 94 | break; | |
| 95 | ||
| 96 | case 'R': | |
| 97 | gets(count); | |
| 98 | if (debug) fprintf(debug, "rmtd: R %s\n", count); | |
| 99 | n = atoi(count); | |
| 100 | if (n > sizeof (record)) | |
| 101 | n = sizeof (record); | |
| 102 | rval = read(tape, record, n); | |
| 103 | if (rval < 0) | |
| 104 | goto ioerror; | |
| 105 | (void) write(1, record, n); | |
| 106 | break; | |
| 107 | ||
| 108 | case 'I': | |
| 109 | gets(op); gets(count); | |
| 110 | if (debug) fprintf(debug, "rmtd: I %s %s\n", op, count); | |
| 111 | { struct mtop mtop; | |
| 112 | mtop.mt_op = atoi(op); | |
| 113 | mtop.mt_count = atoi(count); | |
| 114 | if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0) | |
| 115 | goto ioerror; | |
| 116 | rval = mtop.mt_count; | |
| 117 | } | |
| 118 | break; | |
| 119 | ||
| 120 | case 'S': /* status */ | |
| 121 | if (debug) fprintf(debug, "rmtd: S\n"); | |
| 122 | { struct mtget mtget; | |
| 123 | if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0) | |
| 124 | goto ioerror; | |
| 125 | rval = sizeof (mtget); | |
| 126 | (void) write(1, (char *)&mtget, sizeof (mtget)); | |
| 127 | break; | |
| 128 | } | |
| 129 | ||
| 130 | default: | |
| 131 | if (debug) fprintf(debug, "rmtd: garbage command %c\n", c); | |
| 132 | exit(1); | |
| 133 | } | |
| 134 | (void) sprintf(resp, "A%d\n", rval); | |
| 135 | (void) write(1, resp, strlen(resp)); | |
| 136 | goto top; | |
| 137 | ioerror: | |
| 138 | error(errno); | |
| 139 | goto top; | |
| 140 | } | |
| 141 | ||
| 142 | gets(bp) | |
| 143 | char *bp; | |
| 144 | { | |
| 145 | int i; | |
| 146 | char *cp = bp; | |
| 147 | ||
| 148 | for (i = 0; i < SSIZE; i++) { | |
| 149 | if (read(0, cp+i, 1) != 1) | |
| 150 | exit(0); | |
| 151 | if (cp[i] == '\n') | |
| 152 | break; | |
| 153 | } | |
| 154 | cp[i] = '\0'; | |
| 155 | } | |
| 156 | ||
| 157 | error(num) | |
| 158 | int num; | |
| 159 | { | |
| 160 | ||
| 161 | (void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]); | |
| 162 | (void) write(1, resp, strlen (resp)); | |
| 163 | } |