Fixed dd
This commit is contained in:
Eric Andersen
parent
3cf52d1958
commit
5de3065f58
@ -20,7 +20,7 @@ const char dd_usage[] =
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usage: [if=name] [of=name] [bs=n] [count=n]\n\
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\tif=FILE\tread from FILE instead of stdin\n\
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\tof=FILE\twrite to FILE instead of stout\n\
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\tbs=n\tread and write N bytes at a time\n\
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\tbs=n\tread and write N BYTES at a time\n\
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\tcount=n\tcopy only n input blocks\n\
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\tskip=n\tskip n input blocks\n\
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\n\
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@ -100,25 +100,25 @@ extern int dd_main (int argc, char **argv)
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/* Parse any options */
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while (argc) {
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if (inFile == NULL && (strncmp("if", *argv, 2) == 0))
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inFile=*argv;
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else if (outFile == NULL && (strncmp("of", *argv, 2) == 0))
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outFile=*argv;
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if (inFile == NULL && (strncmp(*argv, "if", 2) == 0))
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inFile=((strchr(*argv, '='))+1);
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else if (outFile == NULL && (strncmp(*argv, "of", 2) == 0))
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outFile=((strchr(*argv, '='))+1);
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else if (strncmp("count", *argv, 5) == 0) {
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count = getNum (*argv);
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count = getNum ((strchr(*argv, '='))+1);
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if (count <= 0) {
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fprintf (stderr, "Bad count value %ld\n", count);
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goto usage;
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}
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}
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else if (strncmp("bs", *argv, 2) == 0) {
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blockSize = getNum(*argv);
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else if (strncmp(*argv, "bs", 2) == 0) {
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blockSize = getNum ((strchr(*argv, '='))+1);
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if (blockSize <= 0) {
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fprintf (stderr, "Bad block size value %d\n", blockSize);
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goto usage;
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}
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}
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else if (strncmp("skip", *argv, 4) == 0) {
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else if (strncmp(*argv, "skip", 4) == 0) {
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skipBlocks = atoi( *argv);
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if (skipBlocks <= 0) {
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fprintf (stderr, "Bad skip value %d\n", skipBlocks);
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@ -129,10 +129,9 @@ extern int dd_main (int argc, char **argv)
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else {
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fprintf (stderr, "Got here. argv=%s\n", *argv);
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goto usage;
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}
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argc--;
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argv++;
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}
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}
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if ( inFile == NULL || outFile == NULL)
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goto usage;
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@ -140,13 +139,13 @@ extern int dd_main (int argc, char **argv)
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buf = malloc (blockSize);
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if (buf == NULL) {
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fprintf (stderr, "Cannot allocate buffer\n");
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return( FALSE);
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exit( FALSE);
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}
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intotal = 0;
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outTotal = 0;
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if (!inFile)
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if (inFile == NULL)
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inFd = STDIN;
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else
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inFd = open (inFile, 0);
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@ -154,10 +153,10 @@ extern int dd_main (int argc, char **argv)
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if (inFd < 0) {
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perror (inFile);
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free (buf);
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return( FALSE);
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exit( FALSE);
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}
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if (!outFile)
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if (outFile == NULL)
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outFd = STDOUT;
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else
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outFd = creat (outFile, 0666);
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@ -166,10 +165,10 @@ extern int dd_main (int argc, char **argv)
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perror (outFile);
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close (inFd);
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free (buf);
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return( FALSE);
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exit( FALSE);
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}
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lseek(inFd, skipBlocks*blockSize, SEEK_SET);
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//lseek(inFd, skipBlocks*blockSize, SEEK_SET);
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while (outTotal < count * blockSize) {
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inCc = read (inFd, buf, blockSize);
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if (inCc < 0) {
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33
dd.c
33
dd.c
@ -20,7 +20,7 @@ const char dd_usage[] =
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usage: [if=name] [of=name] [bs=n] [count=n]\n\
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\tif=FILE\tread from FILE instead of stdin\n\
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\tof=FILE\twrite to FILE instead of stout\n\
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\tbs=n\tread and write N bytes at a time\n\
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\tbs=n\tread and write N BYTES at a time\n\
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\tcount=n\tcopy only n input blocks\n\
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\tskip=n\tskip n input blocks\n\
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\n\
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@ -100,25 +100,25 @@ extern int dd_main (int argc, char **argv)
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/* Parse any options */
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while (argc) {
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if (inFile == NULL && (strncmp("if", *argv, 2) == 0))
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inFile=*argv;
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else if (outFile == NULL && (strncmp("of", *argv, 2) == 0))
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outFile=*argv;
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if (inFile == NULL && (strncmp(*argv, "if", 2) == 0))
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inFile=((strchr(*argv, '='))+1);
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else if (outFile == NULL && (strncmp(*argv, "of", 2) == 0))
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outFile=((strchr(*argv, '='))+1);
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else if (strncmp("count", *argv, 5) == 0) {
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count = getNum (*argv);
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count = getNum ((strchr(*argv, '='))+1);
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if (count <= 0) {
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fprintf (stderr, "Bad count value %ld\n", count);
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goto usage;
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}
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}
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else if (strncmp("bs", *argv, 2) == 0) {
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blockSize = getNum(*argv);
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else if (strncmp(*argv, "bs", 2) == 0) {
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blockSize = getNum ((strchr(*argv, '='))+1);
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if (blockSize <= 0) {
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fprintf (stderr, "Bad block size value %d\n", blockSize);
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goto usage;
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}
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}
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else if (strncmp("skip", *argv, 4) == 0) {
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else if (strncmp(*argv, "skip", 4) == 0) {
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skipBlocks = atoi( *argv);
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if (skipBlocks <= 0) {
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fprintf (stderr, "Bad skip value %d\n", skipBlocks);
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@ -129,10 +129,9 @@ extern int dd_main (int argc, char **argv)
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else {
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fprintf (stderr, "Got here. argv=%s\n", *argv);
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goto usage;
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}
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argc--;
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argv++;
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}
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}
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if ( inFile == NULL || outFile == NULL)
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goto usage;
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@ -140,13 +139,13 @@ extern int dd_main (int argc, char **argv)
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buf = malloc (blockSize);
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if (buf == NULL) {
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fprintf (stderr, "Cannot allocate buffer\n");
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return( FALSE);
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exit( FALSE);
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}
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intotal = 0;
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outTotal = 0;
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if (!inFile)
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if (inFile == NULL)
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inFd = STDIN;
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else
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inFd = open (inFile, 0);
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@ -154,10 +153,10 @@ extern int dd_main (int argc, char **argv)
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if (inFd < 0) {
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perror (inFile);
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free (buf);
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return( FALSE);
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exit( FALSE);
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}
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if (!outFile)
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if (outFile == NULL)
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outFd = STDOUT;
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else
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outFd = creat (outFile, 0666);
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@ -166,10 +165,10 @@ extern int dd_main (int argc, char **argv)
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perror (outFile);
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close (inFd);
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free (buf);
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return( FALSE);
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exit( FALSE);
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}
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lseek(inFd, skipBlocks*blockSize, SEEK_SET);
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//lseek(inFd, skipBlocks*blockSize, SEEK_SET);
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while (outTotal < count * blockSize) {
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inCc = read (inFd, buf, blockSize);
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if (inCc < 0) {
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