mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-24 12:19:49 +00:00
98 lines
1.9 KiB
C
98 lines
1.9 KiB
C
#include "internal.h"
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#include <stdio.h>
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#include <sys/mtio.h>
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#include <sys/fcntl.h>
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static const char mt_usage[] = "mt [-f device] opcode value\n";
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struct mt_opcodes {
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char * name;
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short value;
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};
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/* missing: eod/seod, stoptions, stwrthreshold, densities */
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static const struct mt_opcodes opcodes[] = {
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{ "bsf", MTBSF },
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{ "bsfm", MTBSFM },
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{ "bsr", MTBSR },
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{ "bss", MTBSS },
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{ "datacompression", MTCOMPRESSION },
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{ "eom", MTEOM },
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{ "erase", MTERASE },
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{ "fsf", MTFSF },
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{ "fsfm", MTFSFM },
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{ "fsr", MTFSR },
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{ "fss", MTFSS },
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{ "load", MTLOAD },
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{ "lock", MTLOCK },
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{ "mkpart", MTMKPART },
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{ "nop", MTNOP },
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{ "offline",MTOFFL },
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{ "rewoffline",MTOFFL },
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{ "ras1", MTRAS1 },
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{ "ras2", MTRAS2 },
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{ "ras3", MTRAS3 },
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{ "reset", MTRESET },
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{ "retension", MTRETEN },
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{ "rew", MTREW },
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{ "seek", MTSEEK },
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{ "setblk", MTSETBLK },
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{ "setdensity", MTSETDENSITY },
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{ "drvbuffer", MTSETDRVBUFFER },
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{ "setpart", MTSETPART },
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{ "tell", MTTELL },
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{ "wset", MTWSM },
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{ "unload", MTUNLOAD },
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{ "unlock", MTUNLOCK },
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{ "eof", MTWEOF },
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{ "weof", MTWEOF },
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{ 0, 0 }
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};
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extern int
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mt_main(int argc, char** argv)
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{
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const char * file = "/dev/tape";
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const struct mt_opcodes * code = opcodes;
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struct mtop op;
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int fd;
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if ( strcmp(argv[1], "-f") == 0 ) {
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if ( argc < 4 ) {
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usage (mt_usage);
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}
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file = argv[2];
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argv += 2;
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argc -= 2;
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}
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while ( code->name != 0 ) {
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if ( strcmp(code->name, argv[1]) == 0 )
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break;
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code++;
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}
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if ( code->name == 0 ) {
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fprintf(stderr, "mt: unrecognized opcode %s.\n", argv[1]);
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return( FALSE);
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}
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op.mt_op = code->value;
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if ( argc >= 3 )
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op.mt_count = atoi(argv[2]);
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else
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op.mt_count = 1; /* One, not zero, right? */
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if ( (fd = open(file, O_RDONLY, 0)) < 0 ) {
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perror(file);
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return( FALSE);
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}
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if ( ioctl(fd, MTIOCTOP, &op) != 0 ) {
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perror(file);
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return( FALSE);
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}
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return( TRUE);
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}
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