busybox/coreutils/od.c

273 lines
6.8 KiB
C

/*
* od implementation for busybox
* Based on code from util-linux v 2.11l
*
* Copyright (c) 1990
* 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 <ctype.h>
#include <getopt.h>
#include <stdlib.h>
#include "dump.h"
#include "busybox.h"
extern FS *fshead; /* head of format strings */
extern int blocksize; /* data block size */
extern int length; /* max bytes to read */
#define ishexdigit(c) \
((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))
static void
odoffset(int argc, char ***argvp)
{
extern off_t skip;
register char *num, *p;
int base;
char *end;
/*
* The offset syntax of od(1) was genuinely bizarre. First, if
* it started with a plus it had to be an offset. Otherwise, if
* there were at least two arguments, a number or lower-case 'x'
* followed by a number makes it an offset. By default it was
* octal; if it started with 'x' or '0x' it was hex. If it ended
* in a '.', it was decimal. If a 'b' or 'B' was appended, it
* multiplied the number by 512 or 1024 byte units. There was
* no way to assign a block count to a hex offset.
*
* We assumes it's a file if the offset is bad.
*/
p = **argvp;
if (!p) {
/* hey someone is probably piping to us ... */
return;
}
if (*p != '+' && (argc < 2 ||
(!isdigit(p[0]) && (p[0] != 'x' || !ishexdigit(p[1])))))
return;
base = 0;
/*
* skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
* set base.
*/
if (p[0] == '+')
++p;
if (p[0] == 'x' && ishexdigit(p[1])) {
++p;
base = 16;
} else if (p[0] == '0' && p[1] == 'x') {
p += 2;
base = 16;
}
/* skip over the number */
if (base == 16)
for (num = p; ishexdigit(*p); ++p);
else
for (num = p; isdigit(*p); ++p);
/* check for no number */
if (num == p)
return;
/* if terminates with a '.', base is decimal */
if (*p == '.') {
if (base)
return;
base = 10;
}
skip = strtol(num, &end, base ? base : 8);
/* if end isn't the same as p, we got a non-octal digit */
if (end != p)
skip = 0;
else {
if (*p) {
if (*p == 'b')
skip *= 512;
else if (*p == 'B')
skip *= 1024;
++p;
}
if (*p)
skip = 0;
else {
++*argvp;
/*
* If the offset uses a non-octal base, the base of
* the offset is changed as well. This isn't pretty,
* but it's easy.
*/
#define TYPE_OFFSET 7
if (base == 16) {
fshead->nextfu->fmt[TYPE_OFFSET] = 'x';
fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x';
} else if (base == 10) {
fshead->nextfu->fmt[TYPE_OFFSET] = 'd';
fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd';
}
}
}
}
static void odprecede(void)
{
static int first = 1;
if (first) {
first = 0;
add("\"%07.7_Ao\n\"");
add("\"%07.7_ao \"");
} else
add("\" \"");
}
int od_main(int argc, char **argv)
{
int ch;
extern enum _vflag vflag;
vflag = FIRST;
length = -1;
while ((ch = getopt(argc, argv, "aBbcDdeFfHhIiLlOoPpswvXx")) != EOF)
switch (ch) {
case 'a':
odprecede();
add("16/1 \"%3_u \" \"\\n\"");
break;
case 'B':
case 'o':
odprecede();
add("8/2 \" %06o \" \"\\n\"");
break;
case 'b':
odprecede();
add("16/1 \"%03o \" \"\\n\"");
break;
case 'c':
odprecede();
add("16/1 \"%3_c \" \"\\n\"");
break;
case 'd':
odprecede();
add("8/2 \" %05u \" \"\\n\"");
break;
case 'D':
odprecede();
add("4/4 \" %010u \" \"\\n\"");
break;
case 'e': /* undocumented in od */
case 'F':
odprecede();
add("2/8 \" %21.14e \" \"\\n\"");
break;
case 'f':
odprecede();
add("4/4 \" %14.7e \" \"\\n\"");
break;
case 'H':
case 'X':
odprecede();
add("4/4 \" %08x \" \"\\n\"");
break;
case 'h':
case 'x':
odprecede();
add("8/2 \" %04x \" \"\\n\"");
break;
case 'I':
case 'L':
case 'l':
odprecede();
add("4/4 \" %11d \" \"\\n\"");
break;
case 'i':
odprecede();
add("8/2 \" %6d \" \"\\n\"");
break;
case 'O':
odprecede();
add("4/4 \" %011o \" \"\\n\"");
break;
case 'v':
vflag = ALL;
break;
case 'P':
case 'p':
case 's':
case 'w':
case '?':
default:
error_msg("od: od(1) has been deprecated for hexdump(1).\n");
if (ch != '?') {
error_msg("od: hexdump(1) compatibility doesn't support the -%c option%s\n",
ch, ch == 's' ? "; see strings(1)." : ".");
}
show_usage();
}
if (!fshead) {
add("\"%07.7_Ao\n\"");
add("\"%07.7_ao \" 8/2 \"%06o \" \"\\n\"");
}
argc -= optind;
argv += optind;
odoffset(argc, &argv);
return(dump(argv));
}
/*-
* Copyright (c) 1990 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.
*/