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platform_system_core/toolbox/dd.c

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/* $NetBSD: dd.c,v 1.37 2004/01/17 21:00:16 dbj Exp $ */
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego and Lance
* Visser of Convex Computer Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)dd.c 8.5 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: dd.c,v 1.37 2004/01/17 21:00:16 dbj Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dd.h"
//#define NO_CONV
//#include "extern.h"
void block(void);
void block_close(void);
void dd_out(int);
void def(void);
void def_close(void);
void jcl(char **);
void pos_in(void);
void pos_out(void);
void summary(void);
void summaryx(int);
void terminate(int);
void unblock(void);
void unblock_close(void);
ssize_t bwrite(int, const void *, size_t);
extern IO in, out;
extern STAT st;
extern void (*cfunc)(void);
extern uint64_t cpy_cnt;
extern uint64_t cbsz;
extern u_int ddflags;
extern u_int files_cnt;
extern int progress;
extern const u_char *ctab;
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define DEFFILEMODE (S_IRUSR | S_IWUSR)
static void dd_close(void);
static void dd_in(void);
static void getfdtype(IO *);
static int redup_clean_fd(int);
static void setup(void);
IO in, out; /* input/output state */
STAT st; /* statistics */
void (*cfunc)(void); /* conversion function */
uint64_t cpy_cnt; /* # of blocks to copy */
static off_t pending = 0; /* pending seek if sparse */
u_int ddflags; /* conversion options */
uint64_t cbsz; /* conversion block size */
u_int files_cnt = 1; /* # of files to copy */
int progress = 0; /* display sign of life */
const u_char *ctab; /* conversion table */
sigset_t infoset; /* a set blocking SIGINFO */
int
dd_main(int argc, char *argv[])
{
int ch;
while ((ch = getopt(argc, argv, "")) != -1) {
switch (ch) {
default:
fprintf(stderr, "usage: dd [operand ...]\n");
exit(1);
/* NOTREACHED */
}
}
argc -= (optind - 1);
argv += (optind - 1);
jcl(argv);
setup();
// (void)signal(SIGINFO, summaryx);
(void)signal(SIGINT, terminate);
(void)sigemptyset(&infoset);
// (void)sigaddset(&infoset, SIGINFO);
(void)atexit(summary);
while (files_cnt--)
dd_in();
dd_close();
exit(0);
/* NOTREACHED */
}
static void
setup(void)
{
if (in.name == NULL) {
in.name = "stdin";
in.fd = STDIN_FILENO;
} else {
in.fd = open(in.name, O_RDONLY, 0);
if (in.fd < 0) {
fprintf(stderr, "%s: cannot open for read: %s\n",
in.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
/* Ensure in.fd is outside the stdio descriptor range */
in.fd = redup_clean_fd(in.fd);
}
getfdtype(&in);
if (files_cnt > 1 && !(in.flags & ISTAPE)) {
fprintf(stderr,
"files is not supported for non-tape devices\n");
exit(1);
/* NOTREACHED */
}
if (out.name == NULL) {
/* No way to check for read access here. */
out.fd = STDOUT_FILENO;
out.name = "stdout";
} else {
#define OFLAGS \
(O_CREAT | (ddflags & (C_SEEK | C_NOTRUNC) ? 0 : O_TRUNC))
out.fd = open(out.name, O_RDWR | OFLAGS, DEFFILEMODE);
/*
* May not have read access, so try again with write only.
* Without read we may have a problem if output also does
* not support seeks.
*/
if (out.fd < 0) {
out.fd = open(out.name, O_WRONLY | OFLAGS, DEFFILEMODE);
out.flags |= NOREAD;
}
if (out.fd < 0) {
fprintf(stderr, "%s: cannot open for write: %s\n",
out.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
/* Ensure out.fd is outside the stdio descriptor range */
out.fd = redup_clean_fd(out.fd);
}
getfdtype(&out);
/*
* Allocate space for the input and output buffers. If not doing
* record oriented I/O, only need a single buffer.
*/
if (!(ddflags & (C_BLOCK|C_UNBLOCK))) {
if ((in.db = malloc(out.dbsz + in.dbsz - 1)) == NULL) {
exit(1);
/* NOTREACHED */
}
out.db = in.db;
} else if ((in.db =
malloc((u_int)(MAX(in.dbsz, cbsz) + cbsz))) == NULL ||
(out.db = malloc((u_int)(out.dbsz + cbsz))) == NULL) {
exit(1);
/* NOTREACHED */
}
in.dbp = in.db;
out.dbp = out.db;
/* Position the input/output streams. */
if (in.offset)
pos_in();
if (out.offset)
pos_out();
/*
* Truncate the output file; ignore errors because it fails on some
* kinds of output files, tapes, for example.
*/
if ((ddflags & (C_OF | C_SEEK | C_NOTRUNC)) == (C_OF | C_SEEK))
(void)ftruncate(out.fd, (off_t)out.offset * out.dbsz);
(void)gettimeofday(&st.start, NULL); /* Statistics timestamp. */
}
static void
getfdtype(IO *io)
{
// struct mtget mt;
struct stat sb;
if (fstat(io->fd, &sb)) {
fprintf(stderr, "%s: cannot fstat: %s\n",
io->name, strerror(errno));
exit(1);
/* NOTREACHED */
}
if (S_ISCHR(sb.st_mode))
io->flags |= /*ioctl(io->fd, MTIOCGET, &mt) ? ISCHR : ISTAPE; */ ISCHR;
else if (lseek(io->fd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE)
io->flags |= ISPIPE; /* XXX fixed in 4.4BSD */
}
/*
* Move the parameter file descriptor to a descriptor that is outside the
* stdio descriptor range, if necessary. This is required to avoid
* accidentally outputting completion or error messages into the
* output file that were intended for the tty.
*/
static int
redup_clean_fd(int fd)
{
int newfd;
if (fd != STDIN_FILENO && fd != STDOUT_FILENO &&
fd != STDERR_FILENO)
/* File descriptor is ok, return immediately. */
return fd;
/*
* 3 is the first descriptor greater than STD*_FILENO. Any
* free descriptor valued 3 or above is acceptable...
*/
newfd = fcntl(fd, F_DUPFD, 3);
if (newfd < 0) {
fprintf(stderr, "dupfd IO: %s\n", strerror(errno));
exit(1);
/* NOTREACHED */
}
close(fd);
return newfd;
}
static void
dd_in(void)
{
int flags;
int64_t n;
for (flags = ddflags;;) {
if (cpy_cnt && (st.in_full + st.in_part) >= cpy_cnt)
return;
/*
* Clear the buffer first if doing "sync" on input.
* If doing block operations use spaces. This will
* affect not only the C_NOERROR case, but also the
* last partial input block which should be padded
* with zero and not garbage.
*/
if (flags & C_SYNC) {
if (flags & (C_BLOCK|C_UNBLOCK))
(void)memset(in.dbp, ' ', in.dbsz);
else
(void)memset(in.dbp, 0, in.dbsz);
}
n = read(in.fd, in.dbp, in.dbsz);
if (n == 0) {
in.dbrcnt = 0;
return;
}
/* Read error. */
if (n < 0) {
/*
* If noerror not specified, die. POSIX requires that
* the warning message be followed by an I/O display.
*/
fprintf(stderr, "%s: read error: %s\n",
in.name, strerror(errno));
if (!(flags & C_NOERROR)) {
exit(1);
/* NOTREACHED */
}
summary();
/*
* If it's not a tape drive or a pipe, seek past the
* error. If your OS doesn't do the right thing for
* raw disks this section should be modified to re-read
* in sector size chunks.
*/
if (!(in.flags & (ISPIPE|ISTAPE)) &&
lseek(in.fd, (off_t)in.dbsz, SEEK_CUR))
fprintf(stderr, "%s: seek error: %s\n",
in.name, strerror(errno));
/* If sync not specified, omit block and continue. */
if (!(ddflags & C_SYNC))
continue;
/* Read errors count as full blocks. */
in.dbcnt += in.dbrcnt = in.dbsz;
++st.in_full;
/* Handle full input blocks. */
} else if (n == in.dbsz) {
in.dbcnt += in.dbrcnt = n;
++st.in_full;
/* Handle partial input blocks. */
} else {
/* If sync, use the entire block. */
if (ddflags & C_SYNC)
in.dbcnt += in.dbrcnt = in.dbsz;
else
in.dbcnt += in.dbrcnt = n;
++st.in_part;
}
/*
* POSIX states that if bs is set and no other conversions
* than noerror, notrunc or sync are specified, the block
* is output without buffering as it is read.
*/
if (ddflags & C_BS) {
out.dbcnt = in.dbcnt;
dd_out(1);
in.dbcnt = 0;
continue;
}
/* if (ddflags & C_SWAB) {
if ((n = in.dbrcnt) & 1) {
++st.swab;
--n;
}
swab(in.dbp, in.dbp, n);
}
*/
in.dbp += in.dbrcnt;
(*cfunc)();
}
}
/*
* Cleanup any remaining I/O and flush output. If necesssary, output file
* is truncated.
*/
static void
dd_close(void)
{
if (cfunc == def)
def_close();
else if (cfunc == block)
block_close();
else if (cfunc == unblock)
unblock_close();
if (ddflags & C_OSYNC && out.dbcnt < out.dbsz) {
(void)memset(out.dbp, 0, out.dbsz - out.dbcnt);
out.dbcnt = out.dbsz;
}
/* If there are pending sparse blocks, make sure
* to write out the final block un-sparse
*/
if ((out.dbcnt == 0) && pending) {
memset(out.db, 0, out.dbsz);
out.dbcnt = out.dbsz;
out.dbp = out.db + out.dbcnt;
pending -= out.dbsz;
}
if (out.dbcnt)
dd_out(1);
/*
* Reporting nfs write error may be defered until next
* write(2) or close(2) system call. So, we need to do an
* extra check. If an output is stdout, the file structure
* may be shared among with other processes and close(2) just
* decreases the reference count.
*/
if (out.fd == STDOUT_FILENO && fsync(out.fd) == -1 && errno != EINVAL) {
fprintf(stderr, "fsync stdout: %s\n", strerror(errno));
exit(1);
/* NOTREACHED */
}
if (close(out.fd) == -1) {
fprintf(stderr, "close: %s\n", strerror(errno));
exit(1);
/* NOTREACHED */
}
}
void
dd_out(int force)
{
static int warned;
int64_t cnt, n, nw;
u_char *outp;
/*
* Write one or more blocks out. The common case is writing a full
* output block in a single write; increment the full block stats.
* Otherwise, we're into partial block writes. If a partial write,
* and it's a character device, just warn. If a tape device, quit.
*
* The partial writes represent two cases. 1: Where the input block
* was less than expected so the output block was less than expected.
* 2: Where the input block was the right size but we were forced to
* write the block in multiple chunks. The original versions of dd(1)
* never wrote a block in more than a single write, so the latter case
* never happened.
*
* One special case is if we're forced to do the write -- in that case
* we play games with the buffer size, and it's usually a partial write.
*/
outp = out.db;
for (n = force ? out.dbcnt : out.dbsz;; n = out.dbsz) {
for (cnt = n;; cnt -= nw) {
if (!force && ddflags & C_SPARSE) {
int sparse, i;
sparse = 1; /* Is buffer sparse? */
for (i = 0; i < cnt; i++)
if (outp[i] != 0) {
sparse = 0;
break;
}
if (sparse) {
pending += cnt;
outp += cnt;
nw = 0;
break;
}
}
if (pending != 0) {
if (lseek(out.fd, pending, SEEK_CUR) ==
-1) {
fprintf(stderr,
"%s: seek error creating "
"sparse file: %s\n",
out.name, strerror(errno));
exit(1);
}
}
nw = bwrite(out.fd, outp, cnt);
if (nw <= 0) {
if (nw == 0) {
fprintf(stderr, "%s: end of device\n",
out.name);
exit(1);
/* NOTREACHED */
}
if (errno != EINTR) {
fprintf(stderr, "%s: write error: %s\n",
out.name, strerror(errno));
/* NOTREACHED */
exit(1);
}
nw = 0;
}
if (pending) {
st.bytes += pending;
st.sparse += pending/out.dbsz;
st.out_full += pending/out.dbsz;
pending = 0;
}
outp += nw;
st.bytes += nw;
if (nw == n) {
if (n != out.dbsz)
++st.out_part;
else
++st.out_full;
break;
}
++st.out_part;
if (nw == cnt)
break;
if (out.flags & ISCHR && !warned) {
warned = 1;
fprintf(stderr, "%s: short write on character "
"device\n", out.name);
}
if (out.flags & ISTAPE) {
fprintf(stderr,
"%s: short write on tape device",
out.name);
exit(1);
/* NOTREACHED */
}
}
if ((out.dbcnt -= n) < out.dbsz)
break;
}
/* Reassemble the output block. */
if (out.dbcnt)
(void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt);
out.dbp = out.db + out.dbcnt;
if (progress)
(void)write(STDERR_FILENO, ".", 1);
}
/*
* A protected against SIGINFO write
*/
ssize_t
bwrite(int fd, const void *buf, size_t len)
{
sigset_t oset;
ssize_t rv;
int oerrno;
(void)sigprocmask(SIG_BLOCK, &infoset, &oset);
rv = write(fd, buf, len);
oerrno = errno;
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
errno = oerrno;
return (rv);
}
/*
* Position input/output data streams before starting the copy. Device type
* dependent. Seekable devices use lseek, and the rest position by reading.
* Seeking past the end of file can cause null blocks to be written to the
* output.
*/
void
pos_in(void)
{
int bcnt, cnt, nr, warned;
/* If not a pipe or tape device, try to seek on it. */
if (!(in.flags & (ISPIPE|ISTAPE))) {
if (lseek(in.fd,
(off_t)in.offset * (off_t)in.dbsz, SEEK_CUR) == -1) {
fprintf(stderr, "%s: seek error: %s",
in.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
return;
/* NOTREACHED */
}
/*
* Read the data. If a pipe, read until satisfy the number of bytes
* being skipped. No differentiation for reading complete and partial
* blocks for other devices.
*/
for (bcnt = in.dbsz, cnt = in.offset, warned = 0; cnt;) {
if ((nr = read(in.fd, in.db, bcnt)) > 0) {
if (in.flags & ISPIPE) {
if (!(bcnt -= nr)) {
bcnt = in.dbsz;
--cnt;
}
} else
--cnt;
continue;
}
if (nr == 0) {
if (files_cnt > 1) {
--files_cnt;
continue;
}
fprintf(stderr, "skip reached end of input\n");
exit(1);
/* NOTREACHED */
}
/*
* Input error -- either EOF with no more files, or I/O error.
* If noerror not set die. POSIX requires that the warning
* message be followed by an I/O display.
*/
if (ddflags & C_NOERROR) {
if (!warned) {
fprintf(stderr, "%s: error occurred\n",
in.name);
warned = 1;
summary();
}
continue;
}
fprintf(stderr, "%s: read error: %s", in.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
}
void
pos_out(void)
{
// struct mtop t_op;
int cnt, n;
/*
* If not a tape, try seeking on the file. Seeking on a pipe is
* going to fail, but don't protect the user -- they shouldn't
* have specified the seek operand.
*/
if (!(out.flags & ISTAPE)) {
if (lseek(out.fd,
(off_t)out.offset * (off_t)out.dbsz, SEEK_SET) == -1) {
fprintf(stderr, "%s: seek error: %s\n",
out.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
return;
}
/* If no read access, try using mtio. */
if (out.flags & NOREAD) {
/* t_op.mt_op = MTFSR;
t_op.mt_count = out.offset;
if (ioctl(out.fd, MTIOCTOP, &t_op) < 0)*/
fprintf(stderr, "%s: cannot read", out.name);
exit(1);
/* NOTREACHED */
return;
}
/* Read it. */
for (cnt = 0; cnt < out.offset; ++cnt) {
if ((n = read(out.fd, out.db, out.dbsz)) > 0)
continue;
if (n < 0) {
fprintf(stderr, "%s: cannot position by reading: %s\n",
out.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
/*
* If reach EOF, fill with NUL characters; first, back up over
* the EOF mark. Note, cnt has not yet been incremented, so
* the EOF read does not count as a seek'd block.
*/
/* t_op.mt_op = MTBSR;
t_op.mt_count = 1;
if (ioctl(out.fd, MTIOCTOP, &t_op) == -1) */ {
fprintf(stderr, "%s: cannot position\n", out.name);
exit(1);
/* NOTREACHED */
}
while (cnt++ < out.offset)
if ((n = bwrite(out.fd, out.db, out.dbsz)) != out.dbsz) {
fprintf(stderr, "%s: cannot position "
"by writing: %s\n",
out.name, strerror(errno));
exit(1);
/* NOTREACHED */
}
break;
}
}
/*
* def --
* Copy input to output. Input is buffered until reaches obs, and then
* output until less than obs remains. Only a single buffer is used.
* Worst case buffer calculation is (ibs + obs - 1).
*/
void
def(void)
{
uint64_t cnt;
u_char *inp;
const u_char *t;
if ((t = ctab) != NULL)
for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
*inp = t[*inp];
/* Make the output buffer look right. */
out.dbp = in.dbp;
out.dbcnt = in.dbcnt;
if (in.dbcnt >= out.dbsz) {
/* If the output buffer is full, write it. */
dd_out(0);
/*
* Ddout copies the leftover output to the beginning of
* the buffer and resets the output buffer. Reset the
* input buffer to match it.
*/
in.dbp = out.dbp;
in.dbcnt = out.dbcnt;
}
}
void
def_close(void)
{
if (ddflags & C_FDATASYNC) {
fdatasync(out.fd);
}
/* Just update the count, everything is already in the buffer. */
if (in.dbcnt)
out.dbcnt = in.dbcnt;
}
#ifdef NO_CONV
/* Build a smaller version (i.e. for a miniroot) */
/* These can not be called, but just in case... */
static const char no_block[] = "unblock and -DNO_CONV?\n";
void block(void) { fprintf(stderr, "%s", no_block + 2); exit(1); }
void block_close(void) { fprintf(stderr, "%s", no_block + 2); exit(1); }
void unblock(void) { fprintf(stderr, "%s", no_block); exit(1); }
void unblock_close(void) { fprintf(stderr, "%s", no_block); exit(1); }
#else /* NO_CONV */
/*
* Copy variable length newline terminated records with a max size cbsz
* bytes to output. Records less than cbs are padded with spaces.
*
* max in buffer: MAX(ibs, cbsz)
* max out buffer: obs + cbsz
*/
void
block(void)
{
static int intrunc;
int ch = 0; /* pacify gcc */
uint64_t cnt, maxlen;
u_char *inp, *outp;
const u_char *t;
/*
* Record truncation can cross block boundaries. If currently in a
* truncation state, keep tossing characters until reach a newline.
* Start at the beginning of the buffer, as the input buffer is always
* left empty.
*/
if (intrunc) {
for (inp = in.db, cnt = in.dbrcnt;
cnt && *inp++ != '\n'; --cnt);
if (!cnt) {
in.dbcnt = 0;
in.dbp = in.db;
return;
}
intrunc = 0;
/* Adjust the input buffer numbers. */
in.dbcnt = cnt - 1;
in.dbp = inp + cnt - 1;
}
/*
* Copy records (max cbsz size chunks) into the output buffer. The
* translation is done as we copy into the output buffer.
*/
for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
maxlen = MIN(cbsz, in.dbcnt);
if ((t = ctab) != NULL)
for (cnt = 0;
cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
*outp++ = t[ch];
else
for (cnt = 0;
cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
*outp++ = ch;
/*
* Check for short record without a newline. Reassemble the
* input block.
*/
if (ch != '\n' && in.dbcnt < cbsz) {
(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
break;
}
/* Adjust the input buffer numbers. */
in.dbcnt -= cnt;
if (ch == '\n')
--in.dbcnt;
/* Pad short records with spaces. */
if (cnt < cbsz)
(void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
else {
/*
* If the next character wouldn't have ended the
* block, it's a truncation.
*/
if (!in.dbcnt || *inp != '\n')
++st.trunc;
/* Toss characters to a newline. */
for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
if (!in.dbcnt)
intrunc = 1;
else
--in.dbcnt;
}
/* Adjust output buffer numbers. */
out.dbp += cbsz;
if ((out.dbcnt += cbsz) >= out.dbsz)
dd_out(0);
outp = out.dbp;
}
in.dbp = in.db + in.dbcnt;
}
void
block_close(void)
{
/*
* Copy any remaining data into the output buffer and pad to a record.
* Don't worry about truncation or translation, the input buffer is
* always empty when truncating, and no characters have been added for
* translation. The bottom line is that anything left in the input
* buffer is a truncated record. Anything left in the output buffer
* just wasn't big enough.
*/
if (in.dbcnt) {
++st.trunc;
(void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
(void)memset(out.dbp + in.dbcnt,
ctab ? ctab[' '] : ' ', cbsz - in.dbcnt);
out.dbcnt += cbsz;
}
}
/*
* Convert fixed length (cbsz) records to variable length. Deletes any
* trailing blanks and appends a newline.
*
* max in buffer: MAX(ibs, cbsz) + cbsz
* max out buffer: obs + cbsz
*/
void
unblock(void)
{
uint64_t cnt;
u_char *inp;
const u_char *t;
/* Translation and case conversion. */
if ((t = ctab) != NULL)
for (cnt = in.dbrcnt, inp = in.dbp - 1; cnt--; inp--)
*inp = t[*inp];
/*
* Copy records (max cbsz size chunks) into the output buffer. The
* translation has to already be done or we might not recognize the
* spaces.
*/
for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t);
if (t >= inp) {
cnt = t - inp + 1;
(void)memmove(out.dbp, inp, cnt);
out.dbp += cnt;
out.dbcnt += cnt;
}
++out.dbcnt;
*out.dbp++ = '\n';
if (out.dbcnt >= out.dbsz)
dd_out(0);
}
if (in.dbcnt)
(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
in.dbp = in.db + in.dbcnt;
}
void
unblock_close(void)
{
uint64_t cnt;
u_char *t;
if (in.dbcnt) {
warnx("%s: short input record", in.name);
for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t);
if (t >= in.db) {
cnt = t - in.db + 1;
(void)memmove(out.dbp, in.db, cnt);
out.dbp += cnt;
out.dbcnt += cnt;
}
++out.dbcnt;
*out.dbp++ = '\n';
}
}
#endif /* NO_CONV */
#define tv2mS(tv) ((tv).tv_sec * 1000LL + ((tv).tv_usec + 500) / 1000)
void
summary(void)
{
char buf[100];
int64_t mS;
struct timeval tv;
if (progress)
(void)write(STDERR_FILENO, "\n", 1);
(void)gettimeofday(&tv, NULL);
mS = tv2mS(tv) - tv2mS(st.start);
if (mS == 0)
mS = 1;
/* Use snprintf(3) so that we don't reenter stdio(3). */
(void)snprintf(buf, sizeof(buf),
"%llu+%llu records in\n%llu+%llu records out\n",
(unsigned long long)st.in_full, (unsigned long long)st.in_part,
(unsigned long long)st.out_full, (unsigned long long)st.out_part);
(void)write(STDERR_FILENO, buf, strlen(buf));
if (st.swab) {
(void)snprintf(buf, sizeof(buf), "%llu odd length swab %s\n",
(unsigned long long)st.swab,
(st.swab == 1) ? "block" : "blocks");
(void)write(STDERR_FILENO, buf, strlen(buf));
}
if (st.trunc) {
(void)snprintf(buf, sizeof(buf), "%llu truncated %s\n",
(unsigned long long)st.trunc,
(st.trunc == 1) ? "block" : "blocks");
(void)write(STDERR_FILENO, buf, strlen(buf));
}
if (st.sparse) {
(void)snprintf(buf, sizeof(buf), "%llu sparse output %s\n",
(unsigned long long)st.sparse,
(st.sparse == 1) ? "block" : "blocks");
(void)write(STDERR_FILENO, buf, strlen(buf));
}
(void)snprintf(buf, sizeof(buf),
"%llu bytes transferred in %lu.%03d secs (%llu bytes/sec)\n",
(unsigned long long) st.bytes,
(long) (mS / 1000),
(int) (mS % 1000),
(unsigned long long) (st.bytes * 1000LL / mS));
(void)write(STDERR_FILENO, buf, strlen(buf));
}
void
terminate(int notused)
{
exit(0);
/* NOTREACHED */
}
static int c_arg(const void *, const void *);
#ifndef NO_CONV
static int c_conv(const void *, const void *);
#endif
static void f_bs(char *);
static void f_cbs(char *);
static void f_conv(char *);
static void f_count(char *);
static void f_files(char *);
static void f_ibs(char *);
static void f_if(char *);
static void f_obs(char *);
static void f_of(char *);
static void f_seek(char *);
static void f_skip(char *);
static void f_progress(char *);
static const struct arg {
const char *name;
void (*f)(char *);
u_int set, noset;
} args[] = {
/* the array needs to be sorted by the first column so
bsearch() can be used to find commands quickly */
{ "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC },
{ "cbs", f_cbs, C_CBS, C_CBS },
{ "conv", f_conv, 0, 0 },
{ "count", f_count, C_COUNT, C_COUNT },
{ "files", f_files, C_FILES, C_FILES },
{ "ibs", f_ibs, C_IBS, C_BS|C_IBS },
{ "if", f_if, C_IF, C_IF },
{ "obs", f_obs, C_OBS, C_BS|C_OBS },
{ "of", f_of, C_OF, C_OF },
{ "progress", f_progress, 0, 0 },
{ "seek", f_seek, C_SEEK, C_SEEK },
{ "skip", f_skip, C_SKIP, C_SKIP },
};
/*
* args -- parse JCL syntax of dd.
*/
void
jcl(char **argv)
{
struct arg *ap, tmp;
char *oper, *arg;
in.dbsz = out.dbsz = 512;
while ((oper = *++argv) != NULL) {
if ((arg = strchr(oper, '=')) == NULL) {
fprintf(stderr, "unknown operand %s\n", oper);
exit(1);
/* NOTREACHED */
}
*arg++ = '\0';
if (!*arg) {
fprintf(stderr, "no value specified for %s\n", oper);
exit(1);
/* NOTREACHED */
}
tmp.name = oper;
if (!(ap = (struct arg *)bsearch(&tmp, args,
sizeof(args)/sizeof(struct arg), sizeof(struct arg),
c_arg))) {
fprintf(stderr, "unknown operand %s\n", tmp.name);
exit(1);
/* NOTREACHED */
}
if (ddflags & ap->noset) {
fprintf(stderr,
"%s: illegal argument combination or already set\n",
tmp.name);
exit(1);
/* NOTREACHED */
}
ddflags |= ap->set;
ap->f(arg);
}
/* Final sanity checks. */
if (ddflags & C_BS) {
/*
* Bs is turned off by any conversion -- we assume the user
* just wanted to set both the input and output block sizes
* and didn't want the bs semantics, so we don't warn.
*/
if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) {
ddflags &= ~C_BS;
ddflags |= C_IBS|C_OBS;
}
/* Bs supersedes ibs and obs. */
if (ddflags & C_BS && ddflags & (C_IBS|C_OBS))
fprintf(stderr, "bs supersedes ibs and obs\n");
}
/*
* Ascii/ebcdic and cbs implies block/unblock.
* Block/unblock requires cbs and vice-versa.
*/
if (ddflags & (C_BLOCK|C_UNBLOCK)) {
if (!(ddflags & C_CBS)) {
fprintf(stderr, "record operations require cbs\n");
exit(1);
/* NOTREACHED */
}
cfunc = ddflags & C_BLOCK ? block : unblock;
} else if (ddflags & C_CBS) {
if (ddflags & (C_ASCII|C_EBCDIC)) {
if (ddflags & C_ASCII) {
ddflags |= C_UNBLOCK;
cfunc = unblock;
} else {
ddflags |= C_BLOCK;
cfunc = block;
}
} else {
fprintf(stderr,
"cbs meaningless if not doing record operations\n");
exit(1);
/* NOTREACHED */
}
} else
cfunc = def;
/* Read, write and seek calls take off_t as arguments.
*
* The following check is not done because an off_t is a quad
* for current NetBSD implementations.
*
* if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz)
* errx(1, "seek offsets cannot be larger than %d", INT_MAX);
*/
}
static int
c_arg(const void *a, const void *b)
{
return (strcmp(((const struct arg *)a)->name,
((const struct arg *)b)->name));
}
static long long strsuftoll(const char* name, const char* arg, int def, unsigned int max)
{
long long result;
if (sscanf(arg, "%lld", &result) == 0)
result = def;
return result;
}
static void
f_bs(char *arg)
{
in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX);
}
static void
f_cbs(char *arg)
{
cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX);
}
static void
f_count(char *arg)
{
cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX);
if (!cpy_cnt)
terminate(0);
}
static void
f_files(char *arg)
{
files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX);
if (!files_cnt)
terminate(0);
}
static void
f_ibs(char *arg)
{
if (!(ddflags & C_BS))
in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX);
}
static void
f_if(char *arg)
{
in.name = arg;
}
static void
f_obs(char *arg)
{
if (!(ddflags & C_BS))
out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX);
}
static void
f_of(char *arg)
{
out.name = arg;
}
static void
f_seek(char *arg)
{
out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX);
}
static void
f_skip(char *arg)
{
in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX);
}
static void
f_progress(char *arg)
{
if (*arg != '0')
progress = 1;
}
#ifdef NO_CONV
/* Build a small version (i.e. for a ramdisk root) */
static void
f_conv(char *arg)
{
fprintf(stderr, "conv option disabled\n");
exit(1);
/* NOTREACHED */
}
#else /* NO_CONV */
static const struct conv {
const char *name;
u_int set, noset;
const u_char *ctab;
} clist[] = {
{ "block", C_BLOCK, C_UNBLOCK, NULL },
{ "fdatasync", C_FDATASYNC, 0, NULL },
{ "noerror", C_NOERROR, 0, NULL },
{ "notrunc", C_NOTRUNC, 0, NULL },
{ "osync", C_OSYNC, C_BS, NULL },
{ "sparse", C_SPARSE, 0, NULL },
{ "swab", C_SWAB, 0, NULL },
{ "sync", C_SYNC, 0, NULL },
{ "unblock", C_UNBLOCK, C_BLOCK, NULL },
/* If you add items to this table, be sure to add the
* conversions to the C_BS check in the jcl routine above.
*/
};
static void
f_conv(char *arg)
{
struct conv *cp, tmp;
while (arg != NULL) {
tmp.name = strsep(&arg, ",");
if (!(cp = (struct conv *)bsearch(&tmp, clist,
sizeof(clist)/sizeof(struct conv), sizeof(struct conv),
c_conv))) {
errx(EXIT_FAILURE, "unknown conversion %s", tmp.name);
/* NOTREACHED */
}
if (ddflags & cp->noset) {
errx(EXIT_FAILURE, "%s: illegal conversion combination", tmp.name);
/* NOTREACHED */
}
ddflags |= cp->set;
if (cp->ctab)
ctab = cp->ctab;
}
}
static int
c_conv(const void *a, const void *b)
{
return (strcmp(((const struct conv *)a)->name,
((const struct conv *)b)->name));
}
#endif /* NO_CONV */
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