1 static char *sccsid = "@(#)mt.c 4.2 (Berkeley) 81/07/05"; 2 3 /* 4 * mt 5 */ 6 7 #include <stdio.h> 8 #include <ctype.h> 9 #include <sys/types.h> 10 #include <sys/mtio.h> 11 #include <sys/ioctl.h> 12 13 struct commands { 14 char *c_name; 15 int c_code; 16 int c_ronly; 17 } com[] = { 18 "eof", MTWEOF, 0, 19 "fsf", MTFSF, 1, 20 "bsf", MTBSF, 1, 21 "fsr", MTFSR, 1, 22 "bsr", MTBSR, 1, 23 "rewind", MTREW, 1, 24 "offline", MTOFFL, 1, 25 0,0 26 }; 27 28 int mtfd; 29 struct mtop mt_com; 30 char *tape; 31 32 main(argc, argv) 33 char **argv; 34 { 35 char line[80], *getenv(); 36 register char *cp; 37 register struct commands *comp; 38 39 if (argc < 2) { 40 fprintf(stderr, "usage: mt [ -t tape ] command [ count ]\n"); 41 exit(1); 42 } 43 if ((strcmp(argv[1], "-t") == 0) && argc > 2) { 44 argc -= 2; 45 tape = argv[2]; 46 argv += 2; 47 } else 48 if ((tape = getenv("TAPE")) == NULL) 49 tape = "/dev/rmt12"; 50 cp = argv[1]; 51 for (comp = com; comp->c_name != NULL; comp++) 52 if (strncmp(cp, comp->c_name, strlen(cp)) == 0) 53 break; 54 if (comp->c_name == NULL) { 55 fprintf(stderr, "mt: don't grok \"%s\"\n", cp); 56 exit(1); 57 } 58 if ((mtfd = open(tape, comp->c_ronly ? 0 : 2)) < 0) { 59 perror(tape); 60 exit(1); 61 } 62 mt_com.mt_count = (argc > 2 ? atoi(argv[2]) : 1); 63 mt_com.mt_op = comp->c_code; 64 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) { 65 fprintf(stderr, "%s %d ", comp->c_name, mt_com.mt_count); 66 perror("failed"); 67 } 68 } 69