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This commit is contained in:
Glenn L McGrath 2002-11-28 11:05:28 +00:00
parent cdf142af90
commit eaed78a91f
1 changed files with 46 additions and 21 deletions
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67
coreutils/dd.c
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@ -46,12 +46,25 @@ static const struct suffix_mult dd_suffixes[] = {
int dd_main(int argc, char **argv)
{
int i, ifd, ofd, oflag, sync_flag = FALSE, trunc = TRUE, noerror = FALSE;
size_t in_full = 0, in_part = 0, out_full = 0, out_part = 0;
size_t bs = 512, count = -1;
size_t out_full = 0;
size_t out_part = 0;
size_t in_full = 0;
size_t in_part = 0;
size_t count = -1;
size_t bs = 512;
ssize_t n;
off_t seek = 0, skip = 0;
char *infile = NULL, *outfile = NULL, *buf;
off_t seek = 0;
off_t skip = 0;
int sync_flag = FALSE;
int noerror = FALSE;
int trunc = TRUE;
int oflag;
int ifd;
int ofd;
int i;
char *infile = NULL;
char *outfile = NULL;
char *buf;
for (i = 1; i < argc; i++) {
if (strncmp("bs=", argv[i], 3) == 0)
@ -93,8 +106,9 @@ int dd_main(int argc, char **argv)
buf = xmalloc(bs);
if (infile != NULL) {
if ((ifd = open(infile, O_RDONLY)) < 0)
if ((ifd = open(infile, O_RDONLY)) < 0) {
perror_msg_and_die("%s", infile);
}
} else {
ifd = STDIN_FILENO;
infile = "standard input";
@ -103,19 +117,22 @@ int dd_main(int argc, char **argv)
if (outfile != NULL) {
oflag = O_WRONLY | O_CREAT;
if (!seek && trunc)
if (!seek && trunc) {
oflag |= O_TRUNC;
}
if ((ofd = open(outfile, oflag, 0666)) < 0)
if ((ofd = open(outfile, oflag, 0666)) < 0) {
perror_msg_and_die("%s", outfile);
}
if (seek && trunc) {
if (ftruncate(ofd, seek * bs) < 0) {
struct stat st;
if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
S_ISDIR (st.st_mode))
S_ISDIR (st.st_mode)) {
perror_msg_and_die("%s", outfile);
}
}
}
} else {
@ -124,13 +141,15 @@ int dd_main(int argc, char **argv)
}
if (skip) {
if (lseek(ifd, skip * bs, SEEK_CUR) < 0)
if (lseek(ifd, skip * bs, SEEK_CUR) < 0) {
perror_msg_and_die("%s", infile);
}
}
if (seek) {
if (lseek(ofd, seek * bs, SEEK_CUR) < 0)
if (lseek(ofd, seek * bs, SEEK_CUR) < 0) {
perror_msg_and_die("%s", outfile);
}
}
while (in_full + in_part != count) {
@ -147,33 +166,39 @@ int dd_main(int argc, char **argv)
perror_msg_and_die("%s", infile);
}
}
if (n == 0)
if (n == 0) {
break;
if (n == bs)
}
if (n == bs) {
in_full++;
else
} else {
in_part++;
}
if (sync_flag) {
memset(buf + n, '\0', bs - n);
n = bs;
}
n = full_write(ofd, buf, n);
if (n < 0)
if (n < 0) {
perror_msg_and_die("%s", outfile);
if (n == bs)
}
if (n == bs) {
out_full++;
else
} else {
out_part++;
}
}
if (close (ifd) < 0)
if (close (ifd) < 0) {
perror_msg_and_die("%s", infile);
}
if (close (ofd) < 0)
if (close (ofd) < 0) {
perror_msg_and_die("%s", outfile);
}
fprintf(stderr, "%ld+%ld records in", (long)in_full, (long)in_part);
fprintf(stderr, "%ld+%ld records out", (long)out_full, (long)out_part);
fprintf(stderr, "%ld+%ld records in\n", (long)in_full, (long)in_part);
fprintf(stderr, "%ld+%ld records out\n", (long)out_full, (long)out_part);
return EXIT_SUCCESS;
}