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00221487731ea1868c57259c7aa0eb713cd7ade7
vim/src/xxd/xxd.c
Goffredo Baroncelli 0022148773 patch 9.1.0094: xxd: buffer-overflow when writing color output 
Problem:  xxd: buffer-overflow when writing color output
Solution: properly account for the color escape sequences and
          adjust LLEN macro
          (Goffredo Baroncelli)

xxd: crash with higer number of column

xxd writes the data into a buffer before printing. Unfortunately
the buffer doesn't consider the space consumed by the escape
sequences used to change the color of the character.

BEFORE:
$ xxd -Ralways -c 256 /etc/passwd
Segmentation fault (core dumped)

AFTER:
$ ./xxd -Ralways -c 256 /etc/passwd
00000000: 726f 6f74 3a78 3a30 3a30 3a72 6f6f 743a 2f72 [...]

To solve this issue I had to increase the size of the buffer
considering for each byte of data 11 further characters for the
color escape sequence.

closes: #14003

Signed-off-by: Goffredo Baroncelli <kreijack@libero.it>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2024-02-10 13:31:06 +01:00

1202 lines
33 KiB
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/* xxd: my hexdump facility. jw
*
* 2.10.90 changed to word output
* 3.03.93 new indent style, dumb bug inserted and fixed.
* -c option, mls
* 26.04.94 better option parser, -ps, -l, -s added.
* 1.07.94 -r badly needs - as input file. Per default autoskip over
* consecutive lines of zeroes, as unix od does.
* -a shows them too.
* -i dump as c-style #include "file.h"
* 1.11.95 if "xxd -i" knows the filename, an 'unsigned char filename_bits[]'
* array is written in correct c-syntax.
* -s improved, now defaults to absolute seek, relative requires a '+'.
* -r improved, now -r -s -0x... is supported.
* change/suppress leading '\0' bytes.
* -l n improved: stops exactly after n bytes.
* -r improved, better handling of partial lines with trailing garbage.
* -r improved, now -r -p works again!
* -r improved, less flushing, much faster now! (that was silly)
* 3.04.96 Per repeated request of a single person: autoskip defaults to off.
* 15.05.96 -v added. They want to know the version.
* -a fixed, to show last line inf file ends in all zeros.
* -u added: Print upper case hex-letters, as preferred by unix bc.
* -h added to usage message. Usage message extended.
* Now using outfile if specified even in normal mode, aehem.
* No longer mixing of ints and longs. May help doze people.
* Added binify ioctl for same reason. (Enough Doze stress for 1996!)
* 16.05.96 -p improved, removed occasional superfluous linefeed.
* 20.05.96 -l 0 fixed. tried to read anyway.
* 21.05.96 -i fixed. now honours -u, and prepends __ to numeric filenames.
* compile -DWIN32 for NT or W95. George V. Reilly, * -v improved :-)
* support --gnuish-longhorn-options
* 25.05.96 MAC support added: CodeWarrior already uses ``outline'' in Types.h
* which is included by MacHeaders (Axel Kielhorn). Renamed to
* xxdline().
* 7.06.96 -i printed 'int' instead of 'char'. *blush*
* added Bram's OS2 ifdefs...
* 18.07.96 gcc -Wall @ SunOS4 is now silent.
* Added osver for MSDOS/DJGPP/WIN32.
* 29.08.96 Added size_t to strncmp() for Amiga.
* 24.03.97 Windows NT support (Phil Hanna). Clean exit for Amiga WB (Bram)
* 02.04.97 Added -E option, to have EBCDIC translation instead of ASCII
* (azc10@yahoo.com)
* 22.05.97 added -g (group octets) option (jcook@namerica.kla.com).
* 23.09.98 nasty -p -r misfeature fixed: slightly wrong output, when -c was
* missing or wrong.
* 26.09.98 Fixed: 'xxd -i infile outfile' did not truncate outfile.
* 27.10.98 Fixed: -g option parser required blank.
* option -b added: 01000101 binary output in normal format.
* 16.05.00 Added VAXC changes by Stephen P. Wall
* 16.05.00 Improved MMS file and merge for VMS by Zoltan Arpadffy
* 2011 March Better error handling by Florian Zumbiehl.
* 2011 April Formatting by Bram Moolenaar
* 08.06.2013 Little-endian hexdump (-e) and offset (-o) by Vadim Vygonets.
* 11.01.2019 Add full 64/32 bit range to -o and output by Christer Jensen.
* 04.02.2020 Add -d for decimal offsets by Aapo Rantalainen
* 14.01.2022 Disable extra newlines with -c0 -p by Erik Auerswald.
* 20.06.2022 Permit setting the variable names used by -i by David Gow
* 31.08.2023 -R never/auto/always prints colored output
* 06.10.2023 enable -r -b to reverse bit dumps
* 12.01.2024 disable auto-conversion for z/OS (MVS)
* 17.01.2024 use size_t instead of usigned int for code-generation (-i), #13876
* 25.01.2024 revert the previous patch (size_t instead of unsigned int)
* 10.02.2024 fix buffer-overflow when writing color output to buffer, #14003
*
* (c) 1990-1998 by Juergen Weigert (jnweiger@gmail.com)
*
* I hereby grant permission to distribute and use xxd
* under X11-MIT or GPL-2.0 (at the user's choice).
*
* Contributions by Bram Moolenaar et al.
*/
/* Visual Studio 2005 has 'deprecated' many of the standard CRT functions */
#if _MSC_VER >= 1400
# define _CRT_SECURE_NO_DEPRECATE
# define _CRT_NONSTDC_NO_DEPRECATE
#endif
#if !defined(CYGWIN) && defined(__CYGWIN__)
# define CYGWIN
#endif
#if (defined(__linux__) && !defined(__ANDROID__)) || defined(__CYGWIN__)
# define _XOPEN_SOURCE 700 /* for fdopen() */
#endif
#include <stdio.h>
#ifdef VAXC
# include <file.h>
#else
# include <fcntl.h>
#endif
#if defined(WIN32) || defined(CYGWIN)
# include <io.h> /* for setmode() */
#endif
#ifdef WIN32
# include <windows.h>
#endif
#ifdef UNIX
# include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#if __MWERKS__ && !defined(BEBOX)
# include <unix.h> /* for fdopen() on MAC */
#endif
/* This corrects the problem of missing prototypes for certain functions
* in some GNU installations (e.g. SunOS 4.1.x).
* Darren Hiebert <darren@hmi.com> (sparc-sun-sunos4.1.3_U1/2.7.2.2)
*/
#if defined(__GNUC__) && defined(__STDC__)
# ifndef __USE_FIXED_PROTOTYPES__
# define __USE_FIXED_PROTOTYPES__
# endif
#endif
#ifndef __USE_FIXED_PROTOTYPES__
/*
* This is historic and works only if the compiler really has no prototypes:
*
* Include prototypes for Sun OS 4.x, when using an ANSI compiler.
* FILE is defined on OS 4.x, not on 5.x (Solaris).
* if __SVR4 is defined (some Solaris versions), don't include this.
*/
#if defined(sun) && defined(FILE) && !defined(__SVR4) && defined(__STDC__)
# define __P(a) a
/* excerpt from my sun_stdlib.h */
extern int fprintf __P((FILE *, char *, ...));
extern int fputs __P((char *, FILE *));
extern int _flsbuf __P((unsigned char, FILE *));
extern int _filbuf __P((FILE *));
extern int fflush __P((FILE *));
extern int fclose __P((FILE *));
extern int fseek __P((FILE *, long, int));
extern int rewind __P((FILE *));
extern void perror __P((char *));
# endif
#endif
char version[] = "xxd 2024-02-10 by Juergen Weigert et al.";
#ifdef WIN32
char osver[] = " (Win32)";
#else
char osver[] = "";
#endif
#if defined(WIN32)
# define BIN_READ(yes) ((yes) ? "rb" : "rt")
# define BIN_WRITE(yes) ((yes) ? "wb" : "wt")
# define BIN_CREAT(yes) ((yes) ? (O_CREAT|O_BINARY) : O_CREAT)
# define BIN_ASSIGN(fp, yes) setmode(fileno(fp), (yes) ? O_BINARY : O_TEXT)
# define PATH_SEP '\\'
#elif defined(CYGWIN)
# define BIN_READ(yes) ((yes) ? "rb" : "rt")
# define BIN_WRITE(yes) ((yes) ? "wb" : "w")
# define BIN_CREAT(yes) ((yes) ? (O_CREAT|O_BINARY) : O_CREAT)
# define BIN_ASSIGN(fp, yes) ((yes) ? (void) setmode(fileno(fp), O_BINARY) : (void) (fp))
# define PATH_SEP '/'
#else
# ifdef VMS
# define BIN_READ(dummy) "r"
# define BIN_WRITE(dummy) "w"
# define BIN_CREAT(dummy) O_CREAT
# define BIN_ASSIGN(fp, dummy) fp
# define PATH_SEP ']'
# define FILE_SEP '.'
# else
# define BIN_READ(dummy) "r"
# define BIN_WRITE(dummy) "w"
# define BIN_CREAT(dummy) O_CREAT
# define BIN_ASSIGN(fp, dummy) fp
# define PATH_SEP '/'
# endif
#endif
/* open has only to arguments on the Mac */
#if __MWERKS__
# define OPEN(name, mode, umask) open(name, mode)
#else
# define OPEN(name, mode, umask) open(name, mode, umask)
#endif
#ifdef AMIGA
# define STRNCMP(s1, s2, l) strncmp(s1, s2, (size_t)l)
#else
# define STRNCMP(s1, s2, l) strncmp(s1, s2, l)
#endif
#ifndef __P
# if defined(__STDC__) || defined(WIN32)
# define __P(a) a
# else
# define __P(a) ()
# endif
#endif
#define TRY_SEEK /* attempt to use lseek, or skip forward by reading */
#define COLS 256 /* change here, if you ever need more columns */
/*
* LLEN is the maximum length of a line; other than the visible characters
* we need to consider also the escape color sequence prologue/epilogue ,
* (11 bytes for each character). The most larger format is the default one:
* addr + 1 word for each col/2 + 1 char for each col
*
* addr 1st group 2nd group
* +-------+ +-----------------+ +------+
* 01234567: 1234 5678 9abc def0 12345678
*
* - addr: typically 012345678: -> from 10 up to 18 bytes (including trailing
* space)
* - 1st group: 1234 5678 9abc ... -> each byte may be colored, so add 11
* for each byte
* - space -> 1 byte
* - 2nd group: 12345678 -> each char may be colore so add 11
* for each byte
* - new line -> 1 byte
* - zero (end line) -> 1 byte
*/
#define LLEN (2*(int)sizeof(unsigned long) + 2 + /* addr + ": " */ \
(11 * 2 + 4 + 1) * (COLS / 2) + /* 1st group */ \
1 + /* space */ \
(1 + 11) * COLS + /* 2nd group */ \
1 + /* new line */ \
1) /* zero */
char hexxa[] = "0123456789abcdef0123456789ABCDEF", *hexx = hexxa;
/* the different hextypes known by this program: */
#define HEX_NORMAL 0
#define HEX_POSTSCRIPT 1
#define HEX_CINCLUDE 2
#define HEX_BITS 3 /* not hex a dump, but bits: 01111001 */
#define HEX_LITTLEENDIAN 4
#define CONDITIONAL_CAPITALIZE(c) (capitalize ? toupper((unsigned char)(c)) : (c))
#define COLOR_PROLOGUE \
l[c++] = '\033'; \
l[c++] = '['; \
l[c++] = '1'; \
l[c++] = ';'; \
l[c++] = '3';
#define COLOR_EPILOGUE \
l[c++] = '\033'; \
l[c++] = '['; \
l[c++] = '0'; \
l[c++] = 'm';
#define COLOR_RED '1'
#define COLOR_GREEN '2'
#define COLOR_YELLOW '3'
#define COLOR_BLUE '4'
#define COLOR_WHITE '7'
static char *pname;
static void
exit_with_usage(void)
{
fprintf(stderr, "Usage:\n %s [options] [infile [outfile]]\n", pname);
fprintf(stderr, " or\n %s -r [-s [-]offset] [-c cols] [-ps] [infile [outfile]]\n", pname);
fprintf(stderr, "Options:\n");
fprintf(stderr, " -a toggle autoskip: A single '*' replaces nul-lines. Default off.\n");
fprintf(stderr, " -b binary digit dump (incompatible with -ps,-i). Default hex.\n");
fprintf(stderr, " -C capitalize variable names in C include file style (-i).\n");
fprintf(stderr, " -c cols format <cols> octets per line. Default 16 (-i: 12, -ps: 30).\n");
fprintf(stderr, " -E show characters in EBCDIC. Default ASCII.\n");
fprintf(stderr, " -e little-endian dump (incompatible with -ps,-i,-r).\n");
fprintf(stderr, " -g bytes number of octets per group in normal output. Default 2 (-e: 4).\n");
fprintf(stderr, " -h print this summary.\n");
fprintf(stderr, " -i output in C include file style.\n");
fprintf(stderr, " -l len stop after <len> octets.\n");
fprintf(stderr, " -n name set the variable name used in C include output (-i).\n");
fprintf(stderr, " -o off add <off> to the displayed file position.\n");
fprintf(stderr, " -ps output in postscript plain hexdump style.\n");
fprintf(stderr, " -r reverse operation: convert (or patch) hexdump into binary.\n");
fprintf(stderr, " -r -s off revert with <off> added to file positions found in hexdump.\n");
fprintf(stderr, " -d show offset in decimal instead of hex.\n");
fprintf(stderr, " -s %sseek start at <seek> bytes abs. %sinfile offset.\n",
#ifdef TRY_SEEK
"[+][-]", "(or +: rel.) ");
#else
"", "");
#endif
fprintf(stderr, " -u use upper case hex letters.\n");
fprintf(stderr, " -R when colorize the output; <when> can be 'always', 'auto' or 'never'. Default: 'auto'.\n"),
fprintf(stderr, " -v show version: \"%s%s\".\n", version, osver);
exit(1);
}
static void
perror_exit(int ret)
{
fprintf(stderr, "%s: ", pname);
perror(NULL);
exit(ret);
}
static void
error_exit(int ret, char *msg)
{
fprintf(stderr, "%s: %s\n", pname, msg);
exit(ret);
}
static int
getc_or_die(FILE *fpi)
{
int c = getc(fpi);
if (c == EOF && ferror(fpi))
perror_exit(2);
return c;
}
static void
putc_or_die(int c, FILE *fpo)
{
if (putc(c, fpo) == EOF)
perror_exit(3);
}
static void
fputs_or_die(char *s, FILE *fpo)
{
if (fputs(s, fpo) == EOF)
perror_exit(3);
}
/* Use a macro to allow for different arguments. */
#define FPRINTF_OR_DIE(args) if (fprintf args < 0) perror_exit(3)
static void
fclose_or_die(FILE *fpi, FILE *fpo)
{
if (fclose(fpo) != 0)
perror_exit(3);
if (fclose(fpi) != 0)
perror_exit(2);
}
/*
* If "c" is a hex digit, return the value.
* Otherwise return -1.
*/
static int
parse_hex_digit(int c)
{
return (c >= '0' && c <= '9') ? c - '0'
: (c >= 'a' && c <= 'f') ? c - 'a' + 10
: (c >= 'A' && c <= 'F') ? c - 'A' + 10
: -1;
}
/*
* If "c" is a bin digit, return the value.
* Otherwise return -1.
*/
static int
parse_bin_digit(int c)
{
return (c >= '0' && c <= '1') ? c - '0'
: -1;
}
/*
* Ignore text on "fpi" until end-of-line or end-of-file.
* Return the '\n' or EOF character.
* When an error is encountered exit with an error message.
*/
static int
skip_to_eol(FILE *fpi, int c)
{
while (c != '\n' && c != EOF)
c = getc_or_die(fpi);
return c;
}
/*
* Max. cols binary characters are decoded from the input stream per line.
* Two adjacent garbage characters after evaluated data delimit valid data.
* Everything up to the next newline is discarded.
*
* The name is historic and came from 'undo type opt h'.
*/
static int
huntype(
FILE *fpi,
FILE *fpo,
int cols,
int hextype,
long base_off)
{
int c, ign_garb = 1, n1 = -1, n2 = 0, n3 = 0, p = cols, bt = 0, b = 0, bcnt = 0;
long have_off = 0, want_off = 0;
rewind(fpi);
while ((c = getc(fpi)) != EOF)
{
if (c == '\r') /* Doze style input file? */
continue;
/* Allow multiple spaces. This doesn't work when there is normal text
* after the hex codes in the last line that looks like hex, thus only
* use it for PostScript format. */
if (hextype == HEX_POSTSCRIPT && (c == ' ' || c == '\n' || c == '\t'))
continue;
if (hextype == HEX_NORMAL || hextype == HEX_POSTSCRIPT)
{
n3 = n2;
n2 = n1;
n1 = parse_hex_digit(c);
if (n1 == -1 && ign_garb)
continue;
}
else /* HEX_BITS */
{
n1 = parse_hex_digit(c);
if (n1 == -1 && ign_garb)
continue;
bt = parse_bin_digit(c);
if (bt != -1)
{
b = ((b << 1) | bt);
++bcnt;
}
}
ign_garb = 0;
if ((hextype != HEX_POSTSCRIPT) && (p >= cols))
{
if (hextype == HEX_NORMAL)
{
if (n1 < 0)
{
p = 0;
continue;
}
want_off = (want_off << 4) | n1;
}
else /* HEX_BITS */
{
if (n1 < 0)
{
p = 0;
bcnt = 0;
continue;
}
want_off = (want_off << 4) | n1;
}
continue;
}
if (base_off + want_off != have_off)
{
if (fflush(fpo) != 0)
perror_exit(3);
#ifdef TRY_SEEK
if (fseek(fpo, base_off + want_off - have_off, SEEK_CUR) >= 0)
have_off = base_off + want_off;
#endif
if (base_off + want_off < have_off)
error_exit(5, "Sorry, cannot seek backwards.");
for (; have_off < base_off + want_off; have_off++)
putc_or_die(0, fpo);
}
if (hextype == HEX_NORMAL || hextype == HEX_POSTSCRIPT)
{
if (n2 >= 0 && n1 >= 0)
{
putc_or_die((n2 << 4) | n1, fpo);
have_off++;
want_off++;
n1 = -1;
if (!hextype && (++p >= cols))
/* skip the rest of the line as garbage */
c = skip_to_eol(fpi, c);
}
else if (n1 < 0 && n2 < 0 && n3 < 0)
/* already stumbled into garbage, skip line, wait and see */
c = skip_to_eol(fpi, c);
}
else /* HEX_BITS */
{
if (bcnt == 8)
{
putc_or_die(b, fpo);
have_off++;
want_off++;
b = 0;
bcnt = 0;
if (++p >= cols)
/* skip the rest of the line as garbage */
c = skip_to_eol(fpi, c);
}
}
if (c == '\n')
{
if (hextype == HEX_NORMAL || hextype == HEX_BITS)
want_off = 0;
p = cols;
ign_garb = 1;
}
}
if (fflush(fpo) != 0)
perror_exit(3);
#ifdef TRY_SEEK
fseek(fpo, 0L, SEEK_END);
#endif
fclose_or_die(fpi, fpo);
return 0;
}
/*
* Print line l. If nz is false, xxdline regards the line a line of
* zeroes. If there are three or more consecutive lines of zeroes,
* they are replaced by a single '*' character.
*
* If the output ends with more than two lines of zeroes, you
* should call xxdline again with l being the last line and nz
* negative. This ensures that the last line is shown even when
* it is all zeroes.
*
* If nz is always positive, lines are never suppressed.
*/
static void
xxdline(FILE *fp, char *l, int nz)
{
static char z[LLEN+1];
static int zero_seen = 0;
if (!nz && zero_seen == 1)
strcpy(z, l);
if (nz || !zero_seen++)
{
if (nz)
{
if (nz < 0)
zero_seen--;
if (zero_seen == 2)
fputs_or_die(z, fp);
if (zero_seen > 2)
fputs_or_die("*\n", fp);
}
if (nz >= 0 || zero_seen > 0)
fputs_or_die(l, fp);
if (nz)
zero_seen = 0;
}
}
/* This is an EBCDIC to ASCII conversion table */
/* from a proposed BTL standard April 16, 1979 */
static unsigned char etoa64[] =
{
0040,0240,0241,0242,0243,0244,0245,0246,
0247,0250,0325,0056,0074,0050,0053,0174,
0046,0251,0252,0253,0254,0255,0256,0257,
0260,0261,0041,0044,0052,0051,0073,0176,
0055,0057,0262,0263,0264,0265,0266,0267,
0270,0271,0313,0054,0045,0137,0076,0077,
0272,0273,0274,0275,0276,0277,0300,0301,
0302,0140,0072,0043,0100,0047,0075,0042,
0303,0141,0142,0143,0144,0145,0146,0147,
0150,0151,0304,0305,0306,0307,0310,0311,
0312,0152,0153,0154,0155,0156,0157,0160,
0161,0162,0136,0314,0315,0316,0317,0320,
0321,0345,0163,0164,0165,0166,0167,0170,
0171,0172,0322,0323,0324,0133,0326,0327,
0330,0331,0332,0333,0334,0335,0336,0337,
0340,0341,0342,0343,0344,0135,0346,0347,
0173,0101,0102,0103,0104,0105,0106,0107,
0110,0111,0350,0351,0352,0353,0354,0355,
0175,0112,0113,0114,0115,0116,0117,0120,
0121,0122,0356,0357,0360,0361,0362,0363,
0134,0237,0123,0124,0125,0126,0127,0130,
0131,0132,0364,0365,0366,0367,0370,0371,
0060,0061,0062,0063,0064,0065,0066,0067,
0070,0071,0372,0373,0374,0375,0376,0377
};
static void
begin_coloring_char (char *l, int *c, int e, int ebcdic)
{
if (ebcdic)
{
if ((e >= 75 && e <= 80) || (e >= 90 && e <= 97) ||
(e >= 107 && e <= 111) || (e >= 121 && e <= 127) ||
(e >= 129 && e <= 137) || (e >= 145 && e <= 154) ||
(e >= 162 && e <= 169) || (e >= 192 && e <= 201) ||
(e >= 208 && e <= 217) || (e >= 226 && e <= 233) ||
(e >= 240 && e <= 249) || (e == 189) || (e == 64) ||
(e == 173) || (e == 224) )
l[(*c)++] = COLOR_GREEN;
else if (e == 37 || e == 13 || e == 5)
l[(*c)++] = COLOR_YELLOW;
else if (e == 0)
l[(*c)++] = COLOR_WHITE;
else if (e == 255)
l[(*c)++] = COLOR_BLUE;
else
l[(*c)++] = COLOR_RED;
}
else /* ASCII */
{
#if defined(__MVS__) && __CHARSET_LIB == 0
if (e >= 64)
l[(*c)++] = COLOR_GREEN;
#else
if (e > 31 && e < 127)
l[(*c)++] = COLOR_GREEN;
#endif
else if (e == 9 || e == 10 || e == 13)
l[(*c)++] = COLOR_YELLOW;
else if (e == 0)
l[(*c)++] = COLOR_WHITE;
else if (e == 255)
l[(*c)++] = COLOR_BLUE;
else
l[(*c)++] = COLOR_RED;
}
l[(*c)++] = 'm';
}
static int
enable_color(void)
{
#ifdef WIN32
DWORD mode;
HANDLE out;
if (!isatty(1))
return 0;
out = GetStdHandle(STD_OUTPUT_HANDLE);
GetConsoleMode(out, &mode);
mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
return (int)SetConsoleMode(out, mode);
#elif defined(UNIX)
return isatty(STDOUT_FILENO);
#else
return 0;
#endif
}
int
main(int argc, char *argv[])
{
FILE *fp, *fpo;
int c, e, p = 0, relseek = 1, negseek = 0, revert = 0, i, x;
int cols = 0, colsgiven = 0, nonzero = 0, autoskip = 0, hextype = HEX_NORMAL;
int capitalize = 0, decimal_offset = 0;
int ebcdic = 0;
int octspergrp = -1; /* number of octets grouped in output */
int grplen; /* total chars per octet group */
long length = -1, n = 0, seekoff = 0;
unsigned long displayoff = 0;
static char l[LLEN+1]; /* static because it may be too big for stack */
char *pp;
char *varname = NULL;
int addrlen = 9;
int color = 0;
char *no_color;
no_color = getenv("NO_COLOR");
if (no_color == NULL || no_color[0] == '\0')
color = enable_color();
#ifdef AMIGA
/* This program doesn't work when started from the Workbench */
if (argc == 0)
exit(1);
#endif
pname = argv[0];
for (pp = pname; *pp; )
if (*pp++ == PATH_SEP)
pname = pp;
#ifdef FILE_SEP
for (pp = pname; *pp; pp++)
if (*pp == FILE_SEP)
{
*pp = '\0';
break;
}
#endif
while (argc >= 2)
{
pp = argv[1] + (!STRNCMP(argv[1], "--", 2) && argv[1][2]);
if (!STRNCMP(pp, "-a", 2)) autoskip = 1 - autoskip;
else if (!STRNCMP(pp, "-b", 2)) hextype = HEX_BITS;
else if (!STRNCMP(pp, "-e", 2)) hextype = HEX_LITTLEENDIAN;
else if (!STRNCMP(pp, "-u", 2)) hexx = hexxa + 16;
else if (!STRNCMP(pp, "-p", 2)) hextype = HEX_POSTSCRIPT;
else if (!STRNCMP(pp, "-i", 2)) hextype = HEX_CINCLUDE;
else if (!STRNCMP(pp, "-C", 2)) capitalize = 1;
else if (!STRNCMP(pp, "-d", 2)) decimal_offset = 1;
else if (!STRNCMP(pp, "-r", 2)) revert++;
else if (!STRNCMP(pp, "-E", 2)) ebcdic++;
else if (!STRNCMP(pp, "-v", 2))
{
fprintf(stderr, "%s%s\n", version, osver);
exit(0);
}
else if (!STRNCMP(pp, "-c", 2))
{
if (pp[2] && !STRNCMP("apitalize", pp + 2, 9))
capitalize = 1;
else if (pp[2] && STRNCMP("ols", pp + 2, 3))
{
colsgiven = 1;
cols = (int)strtol(pp + 2, NULL, 0);
}
else
{
if (!argv[2])
exit_with_usage();
colsgiven = 1;
cols = (int)strtol(argv[2], NULL, 0);
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-g", 2))
{
if (pp[2] && STRNCMP("roup", pp + 2, 4))
octspergrp = (int)strtol(pp + 2, NULL, 0);
else
{
if (!argv[2])
exit_with_usage();
octspergrp = (int)strtol(argv[2], NULL, 0);
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-o", 2))
{
int reloffset = 0;
int negoffset = 0;
if (pp[2] && STRNCMP("ffset", pp + 2, 5))
displayoff = strtoul(pp + 2, NULL, 0);
else
{
if (!argv[2])
exit_with_usage();
if (argv[2][0] == '+')
reloffset++;
if (argv[2][reloffset] == '-')
negoffset++;
if (negoffset)
displayoff = ULONG_MAX - strtoul(argv[2] + reloffset+negoffset, NULL, 0) + 1;
else
displayoff = strtoul(argv[2] + reloffset+negoffset, NULL, 0);
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-s", 2))
{
relseek = 0;
negseek = 0;
if (pp[2] && STRNCMP("kip", pp+2, 3) && STRNCMP("eek", pp+2, 3))
{
#ifdef TRY_SEEK
if (pp[2] == '+')
relseek++;
if (pp[2+relseek] == '-')
negseek++;
#endif
seekoff = strtol(pp + 2+relseek+negseek, (char **)NULL, 0);
}
else
{
if (!argv[2])
exit_with_usage();
#ifdef TRY_SEEK
if (argv[2][0] == '+')
relseek++;
if (argv[2][relseek] == '-')
negseek++;
#endif
seekoff = strtol(argv[2] + relseek+negseek, (char **)NULL, 0);
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-l", 2))
{
if (pp[2] && STRNCMP("en", pp + 2, 2))
length = strtol(pp + 2, (char **)NULL, 0);
else
{
if (!argv[2])
exit_with_usage();
length = strtol(argv[2], (char **)NULL, 0);
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-n", 2))
{
if (pp[2] && STRNCMP("ame", pp + 2, 3))
varname = pp + 2;
else
{
if (!argv[2])
exit_with_usage();
varname = argv[2];
argv++;
argc--;
}
}
else if (!STRNCMP(pp, "-R", 2))
{
char *pw = pp + 2;
if (!pw[0])
{
pw = argv[2];
argv++;
argc--;
}
if (!pw)
exit_with_usage();
if (!STRNCMP(pw, "always", 6))
{
(void)enable_color();
color = 1;
}
else if (!STRNCMP(pw, "never", 5))
color = 0;
else if (!STRNCMP(pw, "auto", 4))
color = enable_color();
else
exit_with_usage();
}
else if (!strcmp(pp, "--")) /* end of options */
{
argv++;
argc--;
break;
}
else if (pp[0] == '-' && pp[1]) /* unknown option */
exit_with_usage();
else
break; /* not an option */
argv++; /* advance to next argument */
argc--;
}
if (!colsgiven || (!cols && hextype != HEX_POSTSCRIPT))
switch (hextype)
{
case HEX_POSTSCRIPT: cols = 30; break;
case HEX_CINCLUDE: cols = 12; break;
case HEX_BITS: cols = 6; break;
case HEX_NORMAL:
case HEX_LITTLEENDIAN:
default: cols = 16; break;
}
if (octspergrp < 0)
switch (hextype)
{
case HEX_BITS: octspergrp = 1; break;
case HEX_NORMAL: octspergrp = 2; break;
case HEX_LITTLEENDIAN: octspergrp = 4; break;
case HEX_POSTSCRIPT:
case HEX_CINCLUDE:
default: octspergrp = 0; break;
}
if ((hextype == HEX_POSTSCRIPT && cols < 0) ||
(hextype != HEX_POSTSCRIPT && cols < 1) ||
((hextype == HEX_NORMAL || hextype == HEX_BITS || hextype == HEX_LITTLEENDIAN)
&& (cols > COLS)))
{
fprintf(stderr, "%s: invalid number of columns (max. %d).\n", pname, COLS);
exit(1);
}
if (octspergrp < 1 || octspergrp > cols)
octspergrp = cols;
else if (hextype == HEX_LITTLEENDIAN && (octspergrp & (octspergrp-1)))
error_exit(1, "number of octets per group must be a power of 2 with -e.");
if (argc > 3)
exit_with_usage();
if (argc == 1 || (argv[1][0] == '-' && !argv[1][1]))
BIN_ASSIGN(fp = stdin, !revert);
else
{
if ((fp = fopen(argv[1], BIN_READ(!revert))) == NULL)
{
fprintf(stderr,"%s: ", pname);
perror(argv[1]);
return 2;
}
}
if (argc < 3 || (argv[2][0] == '-' && !argv[2][1]))
BIN_ASSIGN(fpo = stdout, revert);
else
{
int fd;
int mode = revert ? O_WRONLY : (O_TRUNC|O_WRONLY);
if (((fd = OPEN(argv[2], mode | BIN_CREAT(revert), 0666)) < 0) ||
(fpo = fdopen(fd, BIN_WRITE(revert))) == NULL)
{
fprintf(stderr, "%s: ", pname);
perror(argv[2]);
return 3;
}
rewind(fpo);
}
#ifdef __MVS__
// Disable auto-conversion on input file descriptors
__disableautocvt(fileno(fp));
#endif
if (revert)
switch (hextype)
{
case HEX_NORMAL:
case HEX_POSTSCRIPT:
case HEX_BITS:
return huntype(fp, fpo, cols, hextype,
negseek ? -seekoff : seekoff);
break;
default:
error_exit(-1, "Sorry, cannot revert this type of hexdump");
}
if (seekoff || negseek || !relseek)
{
#ifdef TRY_SEEK
if (relseek)
e = fseek(fp, negseek ? -seekoff : seekoff, SEEK_CUR);
else
e = fseek(fp, negseek ? -seekoff : seekoff,
negseek ? SEEK_END : SEEK_SET);
if (e < 0 && negseek)
error_exit(4, "Sorry, cannot seek.");
if (e >= 0)
seekoff = ftell(fp);
else
#endif
{
long s = seekoff;
while (s--)
if (getc_or_die(fp) == EOF)
{
error_exit(4, "Sorry, cannot seek.");
}
}
}
if (hextype == HEX_CINCLUDE)
{
/* A user-set variable name overrides fp == stdin */
if (varname == NULL && fp != stdin)
varname = argv[1];
if (varname != NULL)
{
FPRINTF_OR_DIE((fpo, "unsigned char %s", isdigit((unsigned char)varname[0]) ? "__" : ""));
for (e = 0; (c = varname[e]) != 0; e++)
putc_or_die(isalnum((unsigned char)c) ? CONDITIONAL_CAPITALIZE(c) : '_', fpo);
fputs_or_die("[] = {\n", fpo);
}
p = 0;
while ((length < 0 || p < length) && (c = getc_or_die(fp)) != EOF)
{
FPRINTF_OR_DIE((fpo, (hexx == hexxa) ? "%s0x%02x" : "%s0X%02X",
(p % cols) ? ", " : (!p ? " " : ",\n "), c));
p++;
}
if (p)
fputs_or_die("\n", fpo);
if (varname != NULL)
{
fputs_or_die("};\n", fpo);
FPRINTF_OR_DIE((fpo, "unsigned int %s", isdigit((unsigned char)varname[0]) ? "__" : ""));
for (e = 0; (c = varname[e]) != 0; e++)
putc_or_die(isalnum((unsigned char)c) ? CONDITIONAL_CAPITALIZE(c) : '_', fpo);
FPRINTF_OR_DIE((fpo, "_%s = %d;\n", capitalize ? "LEN" : "len", p));
}
fclose_or_die(fp, fpo);
return 0;
}
if (hextype == HEX_POSTSCRIPT)
{
p = cols;
while ((length < 0 || n < length) && (e = getc_or_die(fp)) != EOF)
{
putc_or_die(hexx[(e >> 4) & 0xf], fpo);
putc_or_die(hexx[e & 0xf], fpo);
n++;
if (cols > 0 && !--p)
{
putc_or_die('\n', fpo);
p = cols;
}
}
if (cols == 0 || p < cols)
putc_or_die('\n', fpo);
fclose_or_die(fp, fpo);
return 0;
}
/* hextype: HEX_NORMAL or HEX_BITS or HEX_LITTLEENDIAN */
if (hextype != HEX_BITS)
{
grplen = octspergrp + octspergrp + 1; /* chars per octet group */
if (color)
grplen += 11 * octspergrp; /* color-code needs 11 extra characters */
}
else /* hextype == HEX_BITS */
grplen = 8 * octspergrp + 1;
while ((length < 0 || n < length) && (e = getc_or_die(fp)) != EOF)
{
if (p == 0)
{
addrlen = sprintf(l, decimal_offset ? "%08ld:" : "%08lx:",
((unsigned long)(n + seekoff + displayoff)));
for (c = addrlen; c < LLEN; l[c++] = ' ')
;
}
x = hextype == HEX_LITTLEENDIAN ? p ^ (octspergrp-1) : p;
c = addrlen + 1 + (grplen * x) / octspergrp;
if (hextype == HEX_NORMAL || hextype == HEX_LITTLEENDIAN)
{
if (color)
{
COLOR_PROLOGUE
begin_coloring_char(l,&c,e,ebcdic);
l[c++] = hexx[(e >> 4) & 0xf];
l[c++] = hexx[e & 0xf];
COLOR_EPILOGUE
}
else /*No colors*/
{
l[c] = hexx[(e >> 4) & 0xf];
l[++c] = hexx[e & 0xf];
}
}
else /* hextype == HEX_BITS */
{
for (i = 7; i >= 0; i--)
l[c++] = (e & (1 << i)) ? '1' : '0';
}
if (e)
nonzero++;
/* When changing this update definition of LLEN above. */
if (hextype == HEX_LITTLEENDIAN)
/* last group will be fully used, round up */
c = grplen * ((cols + octspergrp - 1) / octspergrp);
else
c = (grplen * cols - 1) / octspergrp;
if (color)
{
if (hextype == HEX_BITS)
c += addrlen + 3 + p*12;
else
c = addrlen + 3 + (grplen * cols - 1)/octspergrp + p*12;
if (hextype == HEX_LITTLEENDIAN)
c += 1;
COLOR_PROLOGUE
begin_coloring_char(l,&c,e,ebcdic);
#if defined(__MVS__) && __CHARSET_LIB == 0
if (e >= 64)
l[c++] = e;
else
l[c++] = '.';
#else
if (ebcdic)
e = (e < 64) ? '.' : etoa64[e-64];
l[c++] = (e > 31 && e < 127) ? e : '.';
#endif
COLOR_EPILOGUE
n++;
if (++p == cols)
{
l[c++] = '\n';
l[c++] = '\0';
xxdline(fpo, l, autoskip ? nonzero : 1);
nonzero = 0;
p = 0;
}
}
else /*no colors*/
{
if (ebcdic)
e = (e < 64) ? '.' : etoa64[e-64];
c += addrlen + 3 + p;
l[c++] =
#if defined(__MVS__) && __CHARSET_LIB == 0
(e >= 64)
#else
(e > 31 && e < 127)
#endif
? e : '.';
n++;
if (++p == cols)
{
l[c++] = '\n';
l[c] = '\0';
xxdline(fpo, l, autoskip ? nonzero : 1);
nonzero = 0;
p = 0;
}
}
}
if (p)
{
l[c++] = '\n';
l[c] = '\0';
if (color)
{
c++;
x = p;
if (hextype == HEX_LITTLEENDIAN)
{
int fill = octspergrp - (p % octspergrp);
if (fill == octspergrp) fill = 0;
c = addrlen + 1 + (grplen * (x - (octspergrp-fill))) / octspergrp;
for (i = 0; i < fill;i++)
{
COLOR_PROLOGUE
l[c++] = COLOR_RED;
l[c++] = 'm';
l[c++] = ' '; /* empty space */
COLOR_EPILOGUE
x++;
p++;
}
}
if (hextype != HEX_BITS)
{
c = addrlen + 1 + (grplen * x) / octspergrp;
c += cols - p;
c += (cols - p) / octspergrp;
for (i = cols - p; i > 0;i--)
{
COLOR_PROLOGUE
l[c++] = COLOR_RED;
l[c++] = 'm';
l[c++] = ' '; /* empty space */
COLOR_EPILOGUE
}
}
}
xxdline(fpo, l, 1);
}
else if (autoskip)
xxdline(fpo, l, -1); /* last chance to flush out suppressed lines */
fclose_or_die(fp, fpo);
return 0;
}
/* vi:set ts=8 sw=4 sts=2 cino+={2 cino+=n-2 : */
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