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Diffstat (limited to 'i/pc104/initrd/conf/busybox/coreutils/dd.c')
-rw-r--r--i/pc104/initrd/conf/busybox/coreutils/dd.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/coreutils/dd.c b/i/pc104/initrd/conf/busybox/coreutils/dd.c
new file mode 100644
index 0000000..4a094e8
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/coreutils/dd.c
@@ -0,0 +1,249 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini dd implementation for busybox
+ *
+ *
+ * Copyright (C) 2000,2001 Matt Kraai
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "busybox.h"
+#include <signal.h> /* For FEATURE_DD_SIGNAL_HANDLING */
+
+static const struct suffix_mult dd_suffixes[] = {
+ { "c", 1 },
+ { "w", 2 },
+ { "b", 512 },
+ { "kD", 1000 },
+ { "k", 1024 },
+ { "K", 1024 }, // compat with coreutils dd
+ { "MD", 1000000 },
+ { "M", 1048576 },
+ { "GD", 1000000000 },
+ { "G", 1073741824 },
+ { NULL, 0 }
+};
+
+static off_t out_full, out_part, in_full, in_part;
+
+static void dd_output_status(int ATTRIBUTE_UNUSED cur_signal)
+{
+ fprintf(stderr, "%"OFF_FMT"d+%"OFF_FMT"d records in\n"
+ "%"OFF_FMT"d+%"OFF_FMT"d records out\n",
+ in_full, in_part,
+ out_full, out_part);
+}
+
+static ssize_t full_write_or_warn(int fd, const void *buf, size_t len,
+ const char* filename)
+{
+ ssize_t n = full_write(fd, buf, len);
+ if (n < 0)
+ bb_perror_msg("writing '%s'", filename);
+ return n;
+}
+
+#if ENABLE_LFS
+#define XATOU_SFX xatoull_sfx
+#else
+#define XATOU_SFX xatoul_sfx
+#endif
+
+int dd_main(int argc, char **argv);
+int dd_main(int argc, char **argv)
+{
+ enum {
+ sync_flag = 1 << 0,
+ noerror = 1 << 1,
+ trunc_flag = 1 << 2,
+ twobufs_flag = 1 << 3,
+ };
+ int flags = trunc_flag;
+ size_t oc = 0, ibs = 512, obs = 512;
+ ssize_t n, w;
+ off_t seek = 0, skip = 0, count = OFF_T_MAX;
+ int oflag, ifd, ofd;
+ const char *infile = NULL, *outfile = NULL;
+ char *ibuf, *obuf;
+
+ if (ENABLE_FEATURE_DD_SIGNAL_HANDLING) {
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = dd_output_status;
+ sa.sa_flags = SA_RESTART;
+ sigemptyset(&sa.sa_mask);
+ sigaction(SIGUSR1, &sa, 0);
+ }
+
+ for (n = 1; n < argc; n++) {
+ char *arg = argv[n];
+ /* Must fit into positive ssize_t */
+ if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("ibs=", arg, 4))
+ ibs = xatoul_range_sfx(arg+4, 0, ((size_t)-1L)/2, dd_suffixes);
+ else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("obs=", arg, 4))
+ obs = xatoul_range_sfx(arg+4, 0, ((size_t)-1L)/2, dd_suffixes);
+ else if (!strncmp("bs=", arg, 3))
+ ibs = obs = xatoul_range_sfx(arg+3, 0, ((size_t)-1L)/2, dd_suffixes);
+ /* These can be large: */
+ else if (!strncmp("count=", arg, 6))
+ count = XATOU_SFX(arg+6, dd_suffixes);
+ else if (!strncmp("seek=", arg, 5))
+ seek = XATOU_SFX(arg+5, dd_suffixes);
+ else if (!strncmp("skip=", arg, 5))
+ skip = XATOU_SFX(arg+5, dd_suffixes);
+
+ else if (!strncmp("if=", arg, 3))
+ infile = arg+3;
+ else if (!strncmp("of=", arg, 3))
+ outfile = arg+3;
+ else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("conv=", arg, 5)) {
+ arg += 5;
+ while (1) {
+ if (!strncmp("notrunc", arg, 7)) {
+ flags &= ~trunc_flag;
+ arg += 7;
+ } else if (!strncmp("sync", arg, 4)) {
+ flags |= sync_flag;
+ arg += 4;
+ } else if (!strncmp("noerror", arg, 7)) {
+ flags |= noerror;
+ arg += 7;
+ } else {
+ bb_error_msg_and_die(bb_msg_invalid_arg, arg, "conv");
+ }
+ if (arg[0] == '\0') break;
+ if (*arg++ != ',') bb_show_usage();
+ }
+ } else
+ bb_show_usage();
+ }
+
+ ibuf = obuf = xmalloc(ibs);
+ if (ibs != obs) {
+ flags |= twobufs_flag;
+ obuf = xmalloc(obs);
+ }
+
+ if (infile != NULL)
+ ifd = xopen(infile, O_RDONLY);
+ else {
+ ifd = STDIN_FILENO;
+ infile = bb_msg_standard_input;
+ }
+
+ if (outfile != NULL) {
+ oflag = O_WRONLY | O_CREAT;
+
+ if (!seek && (flags & trunc_flag))
+ oflag |= O_TRUNC;
+
+ ofd = xopen(outfile, oflag);
+
+ if (seek && (flags & trunc_flag)) {
+ if (ftruncate(ofd, seek * obs) < 0) {
+ struct stat st;
+
+ if (fstat(ofd, &st) < 0 || S_ISREG(st.st_mode) ||
+ S_ISDIR(st.st_mode))
+ goto die_outfile;
+ }
+ }
+ } else {
+ ofd = STDOUT_FILENO;
+ outfile = bb_msg_standard_output;
+ }
+
+ if (skip) {
+ if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
+ while (skip-- > 0) {
+ n = safe_read(ifd, ibuf, ibs);
+ if (n < 0)
+ bb_perror_msg_and_die("%s", infile);
+ if (n == 0)
+ break;
+ }
+ }
+ }
+
+ if (seek) {
+ if (lseek(ofd, seek * obs, SEEK_CUR) < 0)
+ goto die_outfile;
+ }
+
+ while (in_full + in_part != count) {
+ if (flags & noerror) {
+ /* Pre-zero the buffer when doing the noerror thing */
+ memset(ibuf, '\0', ibs);
+ }
+
+ n = safe_read(ifd, ibuf, ibs);
+ if (n == 0)
+ break;
+ if (n < 0) {
+ if (flags & noerror) {
+ n = ibs;
+ bb_perror_msg("%s", infile);
+ } else
+ bb_perror_msg_and_die("%s", infile);
+ }
+ if ((size_t)n == ibs)
+ in_full++;
+ else {
+ in_part++;
+ if (flags & sync_flag) {
+ memset(ibuf + n, '\0', ibs - n);
+ n = ibs;
+ }
+ }
+ if (flags & twobufs_flag) {
+ char *tmp = ibuf;
+ while (n) {
+ size_t d = obs - oc;
+
+ if (d > n)
+ d = n;
+ memcpy(obuf + oc, tmp, d);
+ n -= d;
+ tmp += d;
+ oc += d;
+ if (oc == obs) {
+ w = full_write_or_warn(ofd, obuf, obs, outfile);
+ if (w < 0) goto out_status;
+ if (w == obs)
+ out_full++;
+ else if (w > 0)
+ out_part++;
+ oc = 0;
+ }
+ }
+ } else {
+ w = full_write_or_warn(ofd, ibuf, n, outfile);
+ if (w < 0) goto out_status;
+ if (w == obs)
+ out_full++;
+ else if (w > 0)
+ out_part++;
+ }
+ }
+
+ if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
+ w = full_write_or_warn(ofd, obuf, oc, outfile);
+ if (w < 0) goto out_status;
+ if (w > 0)
+ out_part++;
+ }
+ if (close(ifd) < 0) {
+ bb_perror_msg_and_die("%s", infile);
+ }
+
+ if (close(ofd) < 0) {
+ die_outfile:
+ bb_perror_msg_and_die("%s", outfile);
+ }
+ out_status:
+ dd_output_status(0);
+
+ return EXIT_SUCCESS;
+}