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Manuel, I rewrite bb_getopt_ulflags() function for more universal usage. My version support now: - options with arguments (optional arg as GNU extension also) - complementaly and/or incomplementaly and/or incongruously and/or list options - long_opt (all applets may have long option, add supporting is trivial) This realisation full compatibile from your version. Code size grow 480 bytes, but only coreutils/* over compensate this size after using new function. Last patch reduced over 800 bytes and not full applied to all. "mkdir" and "mv" applets have long_opt now for demonstrate trivial addition support long_opt with usage new bb_getopt_ulflags(). Complementaly and/or incomplementaly and/or incongruously and/or list options logic is not trivial, but new "cut" and "grep" applets using this logic for examples with full demostrating. New "grep" applet reduced over 300 bytes. Mark, Also. I removed bug from "grep" applet. $ echo a b | busybox grep -e a b a b a b But right is printing one only. --w vodz
204 lines
4.4 KiB
C
204 lines
4.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini dd implementation for busybox
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*
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*
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* Copyright (C) 2000,2001 Matt Kraai
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include "busybox.h"
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static const struct suffix_mult dd_suffixes[] = {
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{ "c", 1 },
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{ "w", 2 },
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{ "b", 512 },
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{ "kD", 1000 },
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{ "k", 1024 },
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{ "MD", 1000000 },
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{ "M", 1048576 },
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{ "GD", 1000000000 },
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{ "G", 1073741824 },
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{ NULL, 0 }
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};
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int dd_main(int argc, char **argv)
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{
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size_t out_full = 0;
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size_t out_part = 0;
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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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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 = 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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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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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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else if (strncmp("skip=", argv[i], 5) == 0)
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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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infile = argv[i]+3;
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else if (strncmp("of=", argv[i], 3) == 0)
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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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while (1) {
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if (strncmp("notrunc", buf, 7) == 0) {
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trunc = FALSE;
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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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buf += 4;
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} else if (strncmp("noerror", buf, 7) == 0) {
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noerror = TRUE;
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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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}
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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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}
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} else
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bb_show_usage();
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}
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buf = xmalloc(bs);
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if (infile != NULL) {
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ifd = bb_xopen(infile, O_RDONLY);
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} else {
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ifd = STDIN_FILENO;
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infile = bb_msg_standard_input;
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}
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if (outfile != NULL) {
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oflag = O_WRONLY | O_CREAT;
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if (!seek && trunc) {
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oflag |= O_TRUNC;
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}
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if ((ofd = open(outfile, oflag, 0666)) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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if (seek && trunc) {
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if (ftruncate(ofd, seek * bs) < 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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S_ISDIR (st.st_mode)) {
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bb_perror_msg_and_die("%s", outfile);
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}
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}
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}
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} else {
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ofd = STDOUT_FILENO;
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outfile = bb_msg_standard_output;
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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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}
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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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bb_perror_msg_and_die("%s", outfile);
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}
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}
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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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}
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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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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 (n == bs) {
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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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}
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n = bb_full_write(ofd, buf, n);
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if (n < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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if (n == bs) {
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out_full++;
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} else {
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out_part++;
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}
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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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if (close (ofd) < 0) {
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bb_perror_msg_and_die("%s", outfile);
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}
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fprintf(stderr, "%ld+%ld records in\n%ld+%ld records out\n",
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(long)in_full, (long)in_part,
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(long)out_full, (long)out_part);
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return EXIT_SUCCESS;
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}
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