1 static char *sccsid = "@(#)mt.c 4.1 (Berkeley) 81/05/11"; 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 } com[] = { 17 "eof", MTWEOF, 18 "fsf", MTFSF, 19 "bsf", MTBSF, 20 "fsr", MTFSR, 21 "bsr", MTBSR, 22 "rewind", MTREW, 23 "offline", MTOFFL, 24 0,0 25 }; 26 27 int mtfd; 28 struct mtop mt_com; 29 char *tape; 30 31 main(argc, argv) 32 char **argv; 33 { 34 char line[80], *getenv(); 35 register char *cp; 36 register struct commands *comp; 37 38 if (argc < 2) { 39 fprintf(stderr, "usage: mt [ -t tape ] command [ count ]\n"); 40 exit(1); 41 } 42 if ((strcmp(argv[1], "-t") == 0) && argc > 2) { 43 argc -= 2; 44 tape = argv[2]; 45 argv += 2; 46 } else 47 if ((tape = getenv("TAPE")) == NULL) 48 tape = "/dev/rmt12"; 49 if ((mtfd = open(tape, 2)) < 0) { 50 if ((mtfd = open(tape, 0)) < 0) { 51 perror(tape); 52 exit(1); 53 } 54 } 55 56 cp = argv[1]; 57 for (comp = com; comp->c_name != NULL; comp++) 58 if (strncmp(cp, comp->c_name, strlen(cp)) == 0) 59 break; 60 if (comp->c_name == NULL) { 61 fprintf(stderr, "mt: don't grok \"%s\"\n", cp); 62 exit(1); 63 } 64 mt_com.mt_count = (argc > 2 ? atoi(argv[2]) : 1); 65 mt_com.mt_op = comp->c_code; 66 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) { 67 fprintf(stderr, "%s %d ", comp->c_name, mt_com.mt_count); 68 perror("failed"); 69 } 70 } 71