mirror of
https://github.com/sheumann/hush.git
synced 2024-08-22 02:29:00 +00:00
Rob Sullivan cleaned up the longstanding patch from Hideki IWAMOTO to add
ibs and obs support to dd, and made it configurable. I cleaned it up a bit further and moved conv= into the same config option.
This commit is contained in:
parent
adde79883f
commit
2686d3bc38
@ -127,6 +127,14 @@ config CONFIG_FEATURE_DD_SIGNAL_HANDLING
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$ dd if=/dev/zero of=/dev/null& pid=$! $ kill -USR1 $pid; sleep 1; kill $pid
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10899206+0 records in 10899206+0 records out
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config CONFIG_FEATURE_DD_IBS_OBS
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bool "Enable ibs, obs and conv options"
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default n
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depends on CONFIG_DD
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help
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Enables support for writing a certain number of bytes in and out,
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at a time, and performing conversions on the data stream.
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config CONFIG_DF
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bool "df"
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default n
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129
coreutils/dd.c
129
coreutils/dd.c
@ -45,21 +45,13 @@ static void dd_output_status(int cur_signal)
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int dd_main(int argc, char **argv)
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{
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size_t count = -1;
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size_t bs = 512;
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size_t count = -1, oc = 0, ibs = 512, obs = 512;
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ssize_t n;
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off_t seek = 0;
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off_t skip = 0;
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int sync_flag = FALSE;
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int noerror = FALSE;
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int trunc_flag = TRUE;
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int oflag;
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int ifd;
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int ofd;
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int i;
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const char *infile = NULL;
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const char *outfile = NULL;
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char *buf;
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off_t seek = 0, skip = 0;
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int sync_flag = FALSE, noerror = FALSE, trunc_flag = TRUE, twobufs_flag = 0,
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oflag, ifd, ofd, i;
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const char *infile = NULL, *outfile = NULL;
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char *ibuf, *obuf;
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if (ENABLE_FEATURE_DD_SIGNAL_HANDLING)
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{
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@ -73,43 +65,49 @@ int dd_main(int argc, char **argv)
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}
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for (i = 1; i < argc; i++) {
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if (strncmp("bs=", argv[i], 3) == 0)
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bs = bb_xparse_number(argv[i]+3, dd_suffixes);
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else if (strncmp("count=", argv[i], 6) == 0)
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if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("ibs=", argv[i], 4)) {
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ibs = bb_xparse_number(argv[i]+4, dd_suffixes);
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twobufs_flag++;
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} else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("obs=", argv[i], 4)) {
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obs = bb_xparse_number(argv[i]+4, dd_suffixes);
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twobufs_flag++;
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} else if (!strncmp("bs=", argv[i], 3)) {
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ibs = obs = bb_xparse_number(argv[i]+3, dd_suffixes);
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} else if (!strncmp("count=", argv[i], 6))
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count = bb_xparse_number(argv[i]+6, dd_suffixes);
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else if (strncmp("seek=", argv[i], 5) == 0)
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else if (!strncmp("seek=", argv[i], 5))
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seek = bb_xparse_number(argv[i]+5, dd_suffixes);
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else if (strncmp("skip=", argv[i], 5) == 0)
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else if (!strncmp("skip=", argv[i], 5))
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skip = bb_xparse_number(argv[i]+5, dd_suffixes);
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else if (strncmp("if=", argv[i], 3) == 0)
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else if (!strncmp("if=", argv[i], 3))
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infile = argv[i]+3;
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else if (strncmp("of=", argv[i], 3) == 0)
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else if (!strncmp("of=", argv[i], 3))
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outfile = argv[i]+3;
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else if (strncmp("conv=", argv[i], 5) == 0) {
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buf = argv[i]+5;
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else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("conv=", argv[i], 5)) {
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ibuf = argv[i]+5;
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while (1) {
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if (strncmp("notrunc", buf, 7) == 0) {
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if (!strncmp("notrunc", ibuf, 7)) {
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trunc_flag = FALSE;
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buf += 7;
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} else if (strncmp("sync", buf, 4) == 0) {
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ibuf += 7;
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} else if (!strncmp("sync", ibuf, 4)) {
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sync_flag = TRUE;
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buf += 4;
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} else if (strncmp("noerror", buf, 7) == 0) {
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ibuf += 4;
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} else if (!strncmp("noerror", ibuf, 7)) {
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noerror = TRUE;
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buf += 7;
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ibuf += 7;
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} else {
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bb_error_msg_and_die("invalid conversion `%s'", argv[i]+5);
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}
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if (buf[0] == '\0')
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break;
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if (buf[0] == ',')
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buf++;
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if (ibuf[0] == '\0') break;
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if (ibuf[0] == ',') ibuf++;
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}
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} else
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bb_show_usage();
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}
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ibuf = xmalloc(ibs);
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buf = xmalloc(bs);
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if (twobufs_flag) obuf = xmalloc(obs);
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else obuf = ibuf;
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if (infile != NULL) {
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ifd = bb_xopen(infile, O_RDONLY);
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@ -128,7 +126,7 @@ int dd_main(int argc, char **argv)
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ofd = bb_xopen3(outfile, oflag, 0666);
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if (seek && trunc_flag) {
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if (ftruncate(ofd, seek * bs) < 0) {
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if (ftruncate(ofd, seek * obs) < 0) {
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struct stat st;
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if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
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@ -143,13 +141,19 @@ int dd_main(int argc, char **argv)
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}
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if (skip) {
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if (lseek(ifd, skip * bs, SEEK_CUR) < 0) {
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if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
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while (skip-- > 0) {
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n = safe_read(ifd, ibuf, ibs);
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if (n < 0)
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bb_perror_msg_and_die("%s", infile);
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if (n == 0)
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break;
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}
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}
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}
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if (seek) {
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if (lseek(ofd, seek * bs, SEEK_CUR) < 0) {
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if (lseek(ofd, seek * obs, SEEK_CUR) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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}
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@ -157,40 +161,63 @@ int dd_main(int argc, char **argv)
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while (in_full + in_part != count) {
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if (noerror) {
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/* Pre-zero the buffer when doing the noerror thing */
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memset(buf, '\0', bs);
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memset(ibuf, '\0', ibs);
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}
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n = safe_read(ifd, ibuf, ibs);
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if (n == 0) {
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break;
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}
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n = safe_read(ifd, buf, bs);
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if (n < 0) {
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if (noerror) {
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n = bs;
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n = ibs;
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bb_perror_msg("%s", infile);
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} else {
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bb_perror_msg_and_die("%s", infile);
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}
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}
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if (n == 0) {
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break;
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}
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if ((size_t)n == bs) {
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if ((size_t)n == ibs) {
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in_full++;
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} else {
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in_part++;
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}
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if (sync_flag) {
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memset(buf + n, '\0', bs - n);
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n = bs;
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memset(ibuf + n, '\0', ibs - n);
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n = ibs;
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}
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n = bb_full_write(ofd, buf, n);
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if (n < 0) {
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}
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if (twobufs_flag) {
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char *tmp = ibuf;
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while (n) {
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size_t d = obs - oc;
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if (d > n) d = n;
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memcpy(obuf + oc, tmp, d);
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n -= d;
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tmp += d;
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oc += d;
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if (oc == obs) {
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if (bb_full_write(ofd, obuf, obs) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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if ((size_t)n == bs) {
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out_full++;
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oc = 0;
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}
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}
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} else {
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out_part++;
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if ((n = bb_full_write(ofd, ibuf, n)) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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if (n == ibs) out_full++;
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else out_part++;
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}
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}
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if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
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if (bb_full_write(ofd, obuf, oc) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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out_part++;
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}
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if (close (ifd) < 0) {
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bb_perror_msg_and_die("%s", infile);
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}
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@ -370,19 +370,23 @@ USE_FEATURE_DATE_ISOFMT( \
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"64\n"
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#define dd_trivial_usage \
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"[if=FILE] [of=FILE] [bs=N] [count=N] [skip=N]\n" \
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"\t [seek=N] [conv=notrunc|noerror|sync]"
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"[if=FILE] [of=FILE] " USE_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n" \
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"\t [seek=N]" USE_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync]")
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#define dd_full_usage \
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"Copy a file, converting and formatting according to options\n\n" \
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"\tif=FILE\t\tread from FILE instead of stdin\n" \
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"\tof=FILE\t\twrite to FILE instead of stdout\n" \
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"\tbs=N\t\tread and write N bytes at a time\n" \
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USE_FEATURE_DD_IBS_OBS("\tibs=N\t\tread N bytes at a time\n") \
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USE_FEATURE_DD_IBS_OBS("\tobs=N\t\twrite N bytes at a time\n") \
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"\tcount=N\t\tcopy only N input blocks\n" \
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"\tskip=N\t\tskip N input blocks\n" \
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"\tseek=N\t\tskip N output blocks\n" \
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USE_FEATURE_DD_IBS_OBS( \
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"\tconv=notrunc\tdon't truncate output file\n" \
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"\tconv=noerror\tcontinue after read errors\n" \
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"\tconv=sync\tpad blocks with zeros\n" \
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) \
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"\n" \
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"Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \
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"MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)"
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@ -1,252 +0,0 @@
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This patch adds support of ibs= and obs= to dd.
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----
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Hideki IWAMOTO h-iwamoto@kit.hi-ho.ne.jp
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--- a/include/usage.h 29 Mar 2004 08:20:08 -0000 1.198
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+++ b/include/usage.h 4 Apr 2004 07:15:21 -0000
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@@ -309,13 +309,15 @@
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"64\n"
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#define dd_trivial_usage \
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- "[if=FILE] [of=FILE] [bs=N] [count=N] [skip=N]\n" \
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- "\t [seek=N] [conv=notrunc|noerror|sync]"
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+ "[if=FILE] [of=FILE] [ibs=N] [obs=N] [bs=N] [count=N]\n" \
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+ "\t [skip=N] [seek=N] [conv=notrunc|noerror|sync]"
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#define dd_full_usage \
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"Copy a file, converting and formatting according to options\n\n" \
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"\tif=FILE\t\tread from FILE instead of stdin\n" \
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"\tof=FILE\t\twrite to FILE instead of stdout\n" \
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- "\tbs=N\t\tread and write N bytes at a time\n" \
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+ "\tibs=N\t\tread N bytes at a time\n" \
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+ "\tobs=N\t\twrite N bytes at a time\n" \
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+ "\tbs=N\t\tforce ibs=N and obs=N\n" \
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"\tcount=N\t\tcopy only N input blocks\n" \
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"\tskip=N\t\tskip N input blocks\n" \
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"\tseek=N\t\tskip N output blocks\n" \
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@@ -323,6 +325,8 @@
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"\tconv=noerror\tcontinue after read errors\n" \
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"\tconv=sync\tpad blocks with zeros\n" \
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"\n" \
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+ "If the bs= expr operand is not specified, the input is processed and collected\n" \
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+ "into full-sized output blocks until the end of the input is reached.\n" \
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"Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \
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"MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)."
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#define dd_example_usage \
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--- a/coreutils/dd.c 30 Jan 2004 22:24:32 -0000 1.55
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+++ b/coreutils/dd.c 4 Apr 2004 07:15:21 -0000
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@@ -30,6 +30,10 @@
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#include <fcntl.h>
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#include "busybox.h"
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+#define C_NOERROR 0x0001
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+#define C_TRUNC 0x0002
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+#define C_SYNC 0x0004
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+#define C_TWOBUFS 0x0008
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static const struct suffix_mult dd_suffixes[] = {
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{ "c", 1 },
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@@ -51,13 +55,13 @@
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size_t in_full = 0;
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size_t in_part = 0;
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size_t count = -1;
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- size_t bs = 512;
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+ size_t ibs = 512;
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+ size_t obs = 512;
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+ size_t oc = 0;
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ssize_t n;
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off_t seek = 0;
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off_t skip = 0;
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- int sync_flag = FALSE;
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- int noerror = FALSE;
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- int trunc_flag = TRUE;
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+ unsigned int dd_flags = C_TWOBUFS | C_TRUNC;
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int oflag;
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int ifd;
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int ofd;
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@@ -65,11 +69,18 @@
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const char *infile = NULL;
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const char *outfile = NULL;
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char *buf;
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+ char *ibuf;
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+ char *obuf;
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for (i = 1; i < argc; i++) {
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- if (strncmp("bs=", argv[i], 3) == 0)
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- bs = bb_xparse_number(argv[i]+3, dd_suffixes);
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- else if (strncmp("count=", argv[i], 6) == 0)
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+ if (strncmp("ibs=", argv[i], 4) == 0)
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+ ibs = bb_xparse_number(argv[i]+4, dd_suffixes);
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+ else if (strncmp("obs=", argv[i], 4) == 0)
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+ obs = bb_xparse_number(argv[i]+4, dd_suffixes);
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+ else if (strncmp("bs=", argv[i], 3) == 0) {
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+ ibs = obs = bb_xparse_number(argv[i]+3, dd_suffixes);
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+ dd_flags &= ~C_TWOBUFS;
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+ } else if (strncmp("count=", argv[i], 6) == 0)
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count = bb_xparse_number(argv[i]+6, dd_suffixes);
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else if (strncmp("seek=", argv[i], 5) == 0)
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seek = bb_xparse_number(argv[i]+5, dd_suffixes);
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@@ -83,13 +94,13 @@
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buf = argv[i]+5;
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while (1) {
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if (strncmp("notrunc", buf, 7) == 0) {
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- trunc_flag = FALSE;
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+ dd_flags &= ~C_TRUNC;
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buf += 7;
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} else if (strncmp("sync", buf, 4) == 0) {
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- sync_flag = TRUE;
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+ dd_flags |= C_SYNC;
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buf += 4;
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} else if (strncmp("noerror", buf, 7) == 0) {
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- noerror = TRUE;
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+ dd_flags |= C_NOERROR;
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buf += 7;
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} else {
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bb_error_msg_and_die("invalid conversion `%s'", argv[i]+5);
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@@ -103,7 +114,12 @@
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bb_show_usage();
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}
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- buf = xmalloc(bs);
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+ ibuf = xmalloc(ibs);
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+
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+ if (dd_flags & C_TWOBUFS)
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+ obuf = xmalloc(obs);
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+ else
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+ obuf = ibuf;
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if (infile != NULL) {
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ifd = bb_xopen(infile, O_RDONLY);
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@@ -115,7 +131,7 @@
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if (outfile != NULL) {
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oflag = O_WRONLY | O_CREAT;
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- if (!seek && trunc_flag) {
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+ if (!seek && (dd_flags & C_TRUNC)) {
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oflag |= O_TRUNC;
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}
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@@ -123,8 +139,8 @@
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bb_perror_msg_and_die("%s", outfile);
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}
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- if (seek && trunc_flag) {
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- if (ftruncate(ofd, seek * bs) < 0) {
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+ if (seek && (dd_flags & C_TRUNC)) {
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+ if (ftruncate(ofd, seek * obs) < 0) {
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struct stat st;
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if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
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@@ -139,52 +155,88 @@
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}
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if (skip) {
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- if (lseek(ifd, skip * bs, SEEK_CUR) < 0) {
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- bb_perror_msg_and_die("%s", infile);
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+ if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
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+ while (skip-- > 0) {
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+ n = safe_read(ifd, ibuf, ibs);
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+ if (n < 0)
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+ bb_perror_msg_and_die("%s", infile);
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+ if (n == 0)
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+ break;
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+ }
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}
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}
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if (seek) {
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- if (lseek(ofd, seek * bs, SEEK_CUR) < 0) {
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+ if (lseek(ofd, seek * obs, SEEK_CUR) < 0) {
|
||||
bb_perror_msg_and_die("%s", outfile);
|
||||
}
|
||||
}
|
||||
|
||||
while (in_full + in_part != count) {
|
||||
- if (noerror) {
|
||||
+ if (dd_flags & C_NOERROR) {
|
||||
/* Pre-zero the buffer when doing the noerror thing */
|
||||
- memset(buf, '\0', bs);
|
||||
+ memset(ibuf, '\0', ibs);
|
||||
+ }
|
||||
+
|
||||
+ n = safe_read(ifd, ibuf, ibs);
|
||||
+ if (n == 0) {
|
||||
+ break;
|
||||
}
|
||||
- n = safe_read(ifd, buf, bs);
|
||||
if (n < 0) {
|
||||
- if (noerror) {
|
||||
- n = bs;
|
||||
+ if (dd_flags & C_NOERROR) {
|
||||
+ n = ibs;
|
||||
bb_perror_msg("%s", infile);
|
||||
} else {
|
||||
bb_perror_msg_and_die("%s", infile);
|
||||
}
|
||||
}
|
||||
- if (n == 0) {
|
||||
- break;
|
||||
- }
|
||||
- if (n == bs) {
|
||||
+ if (n == ibs) {
|
||||
in_full++;
|
||||
} else {
|
||||
in_part++;
|
||||
+ if (dd_flags & C_SYNC) {
|
||||
+ memset(ibuf + n, '\0', ibs - n);
|
||||
+ n = ibs;
|
||||
+ }
|
||||
}
|
||||
- if (sync_flag) {
|
||||
- memset(buf + n, '\0', bs - n);
|
||||
- n = bs;
|
||||
+
|
||||
+ if (dd_flags & C_TWOBUFS) {
|
||||
+ size_t d;
|
||||
+ char *tmp = ibuf;
|
||||
+
|
||||
+ while (n) {
|
||||
+ d = obs - oc;
|
||||
+ if (d > n)
|
||||
+ d = n;
|
||||
+ memcpy(obuf + oc, tmp, d);
|
||||
+ n -= d;
|
||||
+ tmp += d;
|
||||
+ oc += d;
|
||||
+ if (oc == obs) {
|
||||
+ if (bb_full_write(ofd, obuf, obs) < 0) {
|
||||
+ bb_perror_msg_and_die("%s", outfile);
|
||||
+ }
|
||||
+ out_full++;
|
||||
+ oc = 0;
|
||||
+ }
|
||||
+ }
|
||||
+ } else {
|
||||
+ if (bb_full_write(ofd, ibuf, n) < 0) {
|
||||
+ bb_perror_msg_and_die("%s", outfile);
|
||||
+ }
|
||||
+ if (n == ibs) {
|
||||
+ out_full++;
|
||||
+ } else {
|
||||
+ out_part++;
|
||||
+ }
|
||||
}
|
||||
- n = bb_full_write(ofd, buf, n);
|
||||
- if (n < 0) {
|
||||
+ }
|
||||
+
|
||||
+ if (oc) {
|
||||
+ if (bb_full_write(ofd, obuf, oc) < 0) {
|
||||
bb_perror_msg_and_die("%s", outfile);
|
||||
}
|
||||
- if (n == bs) {
|
||||
- out_full++;
|
||||
- } else {
|
||||
- out_part++;
|
||||
- }
|
||||
+ out_part++;
|
||||
}
|
||||
|
||||
if (close (ifd) < 0) {
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user