blob: 0b460a70d03e029fdda79d52c708b1a6c6deb93d [file] [log] [blame]
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/* 1999-02-22 Arkadiusz Miƛkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*/
#include <sys/types.h>
#include <sys/file.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "hexdump.h"
#include "nls.h"
#include "xalloc.h"
#include "strutils.h"
#include "colors.h"
static void escape(char *p1);
static struct list_head *color_fmt(char *cfmt, int bcnt);
static void __attribute__ ((__noreturn__)) badcnt(const char *s)
{
errx(EXIT_FAILURE, _("bad byte count for conversion character %s"), s);
}
static void __attribute__ ((__noreturn__)) badsfmt(void)
{
errx(EXIT_FAILURE, _("%%s requires a precision or a byte count"));
}
static void __attribute__ ((__noreturn__)) badfmt(const char *fmt)
{
errx(EXIT_FAILURE, _("bad format {%s}"), fmt);
}
static void __attribute__ ((__noreturn__)) badconv(const char *ch)
{
errx(EXIT_FAILURE, _("bad conversion character %%%s"), ch);
}
#define first_letter(s,f) strchr(f, *(s))
struct hexdump_fu *endfu; /* format at end-of-data */
void addfile(char *name, struct hexdump *hex)
{
char *fmt, *buf = NULL;
FILE *fp;
size_t n;
if ((fp = fopen(name, "r")) == NULL)
err(EXIT_FAILURE, _("can't read %s"), name);
while (getline(&buf, &n, fp) != -1) {
fmt = buf;
while (*fmt && isspace(*fmt))
++fmt;
if (!*fmt || *fmt == '#')
continue;
add_fmt(fmt, hex);
}
free(buf);
fclose(fp);
}
void add_fmt(const char *fmt, struct hexdump *hex)
{
const char *p, *savep;
struct hexdump_fs *tfs;
struct hexdump_fu *tfu;
/* Start new linked list of format units. */
tfs = xcalloc(1, sizeof(struct hexdump_fs));
INIT_LIST_HEAD(&tfs->fslist);
INIT_LIST_HEAD(&tfs->fulist);
list_add_tail(&tfs->fslist, &hex->fshead);
/* Take the format string and break it up into format units. */
p = fmt;
while (TRUE) {
/* Skip leading white space. */
if (!*(p = skip_space(p)))
break;
/* Allocate a new format unit and link it in. */
tfu = xcalloc(1, sizeof(struct hexdump_fu));
tfu->reps = 1;
INIT_LIST_HEAD(&tfu->fulist);
INIT_LIST_HEAD(&tfu->prlist);
list_add_tail(&tfu->fulist, &tfs->fulist);
/* If leading digit, repetition count. */
if (isdigit(*p)) {
savep = p;
while (isdigit(*p))
p++;
if (!isspace(*p) && *p != '/')
badfmt(fmt);
/* may overwrite either white space or slash */
tfu->reps = atoi(savep);
tfu->flags = F_SETREP;
/* skip trailing white space */
p = skip_space(++p);
}
/* Skip slash and trailing white space. */
if (*p == '/')
p = skip_space(++p);
/* byte count */
if (isdigit(*p)) {
savep = p;
while (isdigit(*p))
p++;
if (!isspace(*p))
badfmt(fmt);
tfu->bcnt = atoi(savep);
/* skip trailing white space */
p = skip_space(++p);
}
/* format */
if (*p != '"')
badfmt(fmt);
savep = ++p;
while (*p != '"') {
if (!*p++)
badfmt(fmt);
}
tfu->fmt = xmalloc(p - savep + 1);
xstrncpy(tfu->fmt, savep, p - savep + 1);
escape(tfu->fmt);
++p;
}
}
static const char *spec = ".#-+ 0123456789";
int block_size(struct hexdump_fs *fs)
{
struct hexdump_fu *fu;
int bcnt, prec, cursize = 0;
char *fmt;
struct list_head *p;
/* figure out the data block size needed for each format unit */
list_for_each (p, &fs->fulist) {
fu = list_entry(p, struct hexdump_fu, fulist);
if (fu->bcnt) {
cursize += fu->bcnt * fu->reps;
continue;
}
bcnt = prec = 0;
fmt = fu->fmt;
while (*fmt) {
if (*fmt != '%') {
++fmt;
continue;
}
/*
* skip any special chars -- save precision in
* case it's a %s format.
*/
while (strchr(spec + 1, *++fmt))
;
if (*fmt == '.' && isdigit(*++fmt)) {
prec = atoi(fmt);
while (isdigit(*++fmt))
;
}
if (first_letter(fmt, "diouxX"))
bcnt += 4;
else if (first_letter(fmt, "efgEG"))
bcnt += 8;
else if (*fmt == 's')
bcnt += prec;
else if (*fmt == 'c' || (*fmt == '_' && first_letter(++fmt, "cpu")))
++bcnt;
++fmt;
}
cursize += bcnt * fu->reps;
}
return(cursize);
}
void rewrite_rules(struct hexdump_fs *fs, struct hexdump *hex)
{
enum { NOTOKAY, USEBCNT, USEPREC } sokay;
struct hexdump_pr *pr;
struct hexdump_fu *fu;
struct list_head *p, *q;
char *p1, *p2, *fmtp;
char savech, cs[4];
int nconv, prec = 0;
list_for_each (p, &fs->fulist) {
fu = list_entry(p, struct hexdump_fu, fulist);
/*
* Break each format unit into print units; each
* conversion character gets its own.
*/
nconv = 0;
fmtp = fu->fmt;
while (*fmtp) {
pr = xcalloc(1, sizeof(struct hexdump_pr));
INIT_LIST_HEAD(&pr->prlist);
list_add_tail(&pr->prlist, &fu->prlist);
/* Skip preceding text and up to the next % sign. */
p1 = fmtp;
while (*p1 && *p1 != '%')
++p1;
/* Only text in the string. */
if (!*p1) {
pr->fmt = xstrdup(fmtp);
pr->flags = F_TEXT;
break;
}
/*
* Get precision for %s -- if have a byte count, don't
* need it.
*/
if (fu->bcnt) {
sokay = USEBCNT;
/* skip to conversion character */
for (p1++; strchr(spec, *p1); p1++)
;
} else {
/* skip any special chars, field width */
while (strchr(spec + 1, *++p1))
;
if (*p1 == '.' && isdigit(*++p1)) {
sokay = USEPREC;
prec = atoi(p1);
while (isdigit(*++p1))
;
} else
sokay = NOTOKAY;
}
p2 = p1 + 1; /* Set end pointer. */
cs[0] = *p1; /* Set conversion string. */
cs[1] = 0;
/*
* Figure out the byte count for each conversion;
* rewrite the format as necessary, set up blank-
* padding for end of data.
*/
if (*cs == 'c') {
pr->flags = F_CHAR;
switch(fu->bcnt) {
case 0:
case 1:
pr->bcnt = 1;
break;
default:
p1[1] = '\0';
badcnt(p1);
}
} else if (first_letter(cs, "di")) {
pr->flags = F_INT;
goto isint;
} else if (first_letter(cs, "ouxX")) {
pr->flags = F_UINT;
isint: cs[3] = '\0';
cs[2] = cs[0];
cs[1] = 'l';
cs[0] = 'l';
switch(fu->bcnt) {
case 0:
pr->bcnt = 4;
break;
case 1:
case 2:
case 4:
case 8:
pr->bcnt = fu->bcnt;
break;
default:
p1[1] = '\0';
badcnt(p1);
}
} else if (first_letter(cs, "efgEG")) {
pr->flags = F_DBL;
switch(fu->bcnt) {
case 0:
pr->bcnt = 8;
break;
case 4:
case 8:
pr->bcnt = fu->bcnt;
break;
default:
p1[1] = '\0';
badcnt(p1);
}
} else if(*cs == 's') {
pr->flags = F_STR;
switch(sokay) {
case NOTOKAY:
badsfmt();
case USEBCNT:
pr->bcnt = fu->bcnt;
break;
case USEPREC:
pr->bcnt = prec;
break;
}
} else if (*cs == '_') {
++p2;
switch(p1[1]) {
case 'A':
endfu = fu;
fu->flags |= F_IGNORE;
/* fallthrough */
case 'a':
pr->flags = F_ADDRESS;
++p2;
if (first_letter(p1 + 2, "dox")) {
cs[0] = 'l';
cs[1] = 'l';
cs[2] = p1[2];
cs[3] = '\0';
} else {
p1[3] = '\0';
badconv(p1);
}
break;
case 'c':
pr->flags = F_C;
/* cs[0] = 'c'; set in conv_c */
goto isint2;
case 'p':
pr->flags = F_P;
cs[0] = 'c';
goto isint2;
case 'u':
pr->flags = F_U;
/* cs[0] = 'c'; set in conv_u */
isint2: switch(fu->bcnt) {
case 0:
case 1:
pr->bcnt = 1;
break;
default:
p1[2] = '\0';
badcnt(p1);
}
break;
default:
p1[2] = '\0';
badconv(p1);
}
} else {
p1[1] = '\0';
badconv(p1);
}
/* Color unit(s) specified */
if (*p2 == '_' && p2[1] == 'L') {
if (colors_wanted()) {
char *a;
/* "cut out" the color_unit(s) */
a = strchr(p2, '[');
p2 = strrchr(p2, ']');
if (a++ && p2)
pr->colorlist = color_fmt(xstrndup(a, p2++ - a), pr->bcnt);
else
badconv(p2);
}
/* we don't want colors, quietly skip over them */
else {
p2 = strrchr(p2, ']');
/* be a bit louder if we don't know how to skip over them */
if (!p2)
badconv("_L");
++p2;
}
}
/*
* Copy to hexdump_pr format string, set conversion character
* pointer, update original.
*/
savech = *p2;
p1[0] = '\0';
pr->fmt = xmalloc(strlen(fmtp) + strlen(cs) + 1);
strcpy(pr->fmt, fmtp);
strcat(pr->fmt, cs);
*p2 = savech;
pr->cchar = pr->fmt + (p1 - fmtp);
fmtp = p2;
/* Only one conversion character if byte count */
if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
errx(EXIT_FAILURE,
_("byte count with multiple conversion characters"));
}
/*
* If format unit byte count not specified, figure it out
* so can adjust rep count later.
*/
if (!fu->bcnt)
list_for_each(q, &fu->prlist)
fu->bcnt
+= (list_entry(q, struct hexdump_pr, prlist))->bcnt;
}
/*
* If the format string interprets any data at all, and it's
* not the same as the blocksize, and its last format unit
* interprets any data at all, and has no iteration count,
* repeat it as necessary.
*
* If rep count is greater than 1, no trailing whitespace
* gets output from the last iteration of the format unit.
*/
list_for_each (p, &fs->fulist) {
fu = list_entry(p, struct hexdump_fu, fulist);
if (list_entry_is_last(&fu->fulist, &fs->fulist) &&
fs->bcnt < hex->blocksize &&
!(fu->flags&F_SETREP) && fu->bcnt)
fu->reps += (hex->blocksize - fs->bcnt) / fu->bcnt;
if (fu->reps > 1 && !list_empty(&fu->prlist)) {
pr = list_last_entry(&fu->prlist, struct hexdump_pr, prlist);
if (!pr)
continue;
for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
p2 = isspace(*p1) ? p1 : NULL;
if (p2)
pr->nospace = p2;
}
}
}
/* [!]color[:string|:hex_number|:oct_number][@offt|@offt_start-offt_end],... */
static struct list_head *color_fmt(char *cfmt, int bcnt)
{
struct hexdump_clr *hc, *hcnext;
struct list_head *ret_head;
char *clr, *fmt;
ret_head = xmalloc(sizeof(struct list_head));
hcnext = hc = xcalloc(1, sizeof(struct hexdump_clr));
INIT_LIST_HEAD(&hc->colorlist);
INIT_LIST_HEAD(ret_head);
list_add_tail(&hc->colorlist, ret_head);
fmt = cfmt;
while (cfmt && *cfmt) {
char *end;
/* invert this condition */
if (*cfmt == '!') {
hcnext->invert = 1;
++cfmt;
}
clr = xstrndup(cfmt, strcspn(cfmt, ":@,"));
cfmt += strlen(clr);
hcnext->fmt = color_sequence_from_colorname(clr);
free(clr);
if (!hcnext->fmt)
return NULL;
/* only colorize this specific value */
if (*cfmt == ':') {
++cfmt;
/* a hex or oct value */
if (*cfmt == '0') {
/* hex */
errno = 0;
end = NULL;
if (cfmt[1] == 'x' || cfmt[1] == 'X')
hcnext->val = strtoul(cfmt + 2, &end, 16);
else
hcnext->val = strtoul(cfmt, &end, 8);
if (errno || end == cfmt)
badfmt(fmt);
cfmt = end;
/* a string */
} else {
off_t fmt_end;
char endchar;
char *endstr;
hcnext->val = -1;
/* temporarily null-delimit the format, so we can reverse-search
* for the start of an offset specifier */
fmt_end = strcspn(cfmt, ",");
endchar = cfmt[fmt_end];
cfmt[fmt_end] = '\0';
endstr = strrchr(cfmt, '@');
if (endstr) {
if (endstr[1] != '\0')
--endstr;
hcnext->str = xstrndup(cfmt, endstr - cfmt + 1);
} else
hcnext->str = xstrndup(cfmt, fmt_end);
/* restore the character */
cfmt[fmt_end] = endchar;
cfmt += strlen(hcnext->str);
}
/* no specific value */
} else
hcnext->val = -1;
/* only colorize at this offset */
hcnext->range = bcnt;
if (cfmt && *cfmt == '@') {
errno = 0;
hcnext->offt = strtoul(++cfmt, &cfmt, 10);
if (errno)
badfmt(fmt);
/* offset range */
if (*cfmt == '-') {
++cfmt;
errno = 0;
hcnext->range =
strtoul(cfmt, &cfmt, 10) - hcnext->offt + 1;
if (errno)
badfmt(fmt);
/* offset range must be between 0 and format byte count */
if (hcnext->range < 0)
badcnt("_L");
/* the offset extends over several print units, clone
* the condition, link it in and adjust the address/offset */
while (hcnext->range > bcnt) {
hc = xcalloc(1, sizeof(struct hexdump_clr));
memcpy(hc, hcnext, sizeof(struct hexdump_clr));
hc->range = bcnt;
INIT_LIST_HEAD(&hc->colorlist);
list_add_tail(&hc->colorlist, ret_head);
hcnext->offt += bcnt;
hcnext->range -= bcnt;
}
}
/* no specific offset */
} else
hcnext->offt = (off_t)-1;
/* check if the string we're looking for is the same length as the range */
if (hcnext->str && (int)strlen(hcnext->str) != hcnext->range)
badcnt("_L");
/* link in another condition */
if (cfmt && *cfmt == ',') {
++cfmt;
hcnext = xcalloc(1, sizeof(struct hexdump_clr));
INIT_LIST_HEAD(&hcnext->colorlist);
list_add_tail(&hcnext->colorlist, ret_head);
}
}
return ret_head;
}
static void escape(char *p1)
{
char *p2;
/* alphabetic escape sequences have to be done in place */
p2 = p1;
while (TRUE) {
if (!*p1) {
*p2 = *p1;
break;
}
if (*p1 == '\\')
switch(*++p1) {
case 'a':
/* *p2 = '\a'; */
*p2 = '\007';
break;
case 'b':
*p2 = '\b';
break;
case 'f':
*p2 = '\f';
break;
case 'n':
*p2 = '\n';
break;
case 'r':
*p2 = '\r';
break;
case 't':
*p2 = '\t';
break;
case 'v':
*p2 = '\v';
break;
default:
*p2 = *p1;
break;
}
++p1; ++p2;
}
}