/* * hexdump implementation for busybox * Based on code from util-linux v 2.11l * * Copyright (c) 1989 *	The Regents of the University of California.  All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Original copyright notice is retained at the end of this file. */#include <getopt.h>#include <stdlib.h>#include <string.h>#include "dump.h"#include "busybox.h"extern off_t skip;                      /* bytes to skip */extern FS *fshead;				/* head of format strings */extern int blocksize;				/* data block size */extern int length;			/* max bytes to read */void addfile(char *name){	register char *p;	FILE *fp;	int ch;	char buf[2048 + 1];	if (!(fp = fopen(name, "r"))) {		error_msg_and_die("hexdump: can't read %s.\n", name);	}	while (fgets(buf, sizeof(buf), fp)) {		if (!(p = index(buf, '\n'))) {			error_msg("hexdump: line too long.\n");			while ((ch = getchar()) != '\n' && ch != EOF);			continue;		}		*p = '\0';		for (p = buf; *p && isspace(*p); ++p);		if (!*p || *p == '#') {			continue;		}		add(p);	}	(void)fclose(fp);}int hexdump_main(int argc, char **argv){//	register FS *tfs;	char *p;	int ch;	extern enum _vflag vflag;	vflag = FIRST;	length = -1;	while ((ch = getopt(argc, argv, "bcde:f:n:os:vx")) != EOF) {		switch (ch) {		case 'b':			add("\"%07.7_Ax\n\"");			add("\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"");			break;		case 'c':			add("\"%07.7_Ax\n\"");			add("\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"");			break;		case 'd':			add("\"%07.7_Ax\n\"");			add("\"%07.7_ax \" 8/2 \"  %05u \" \"\\n\"");			break;		case 'e':			add(optarg);			break;		case 'f':			addfile(optarg);			break;		case 'n':			if ((length = atoi(optarg)) < 0) {				error_msg_and_die("hexdump: bad length value.\n");			}			break;		case 'o':			add("\"%07.7_Ax\n\"");			add("\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"");			break;		case 's':			if ((skip = strtol(optarg, &p, 0)) < 0) {				error_msg_and_die("hexdump: bad skip value.\n");			}			switch(*p) {				case 'b':					skip *= 512;					break;				case 'k':					skip *= 1024;					break;				case 'm':					skip *= 1048576;					break;			}			break;		case 'v':			vflag = ALL;			break;		case 'x':			add("\"%07.7_Ax\n\"");			add("\"%07.7_ax \" 8/2 \"   %04x \" \"\\n\"");			break;		case '?':			show_usage();		}	}	if (!fshead) {		add("\"%07.7_Ax\n\"");		add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");	}	argv += optind;	return(dump(argv));}/* * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * 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. */