freebsd-skq/bin/ls/util.c
pfg 872b698bd4 General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

251 lines
5.8 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Michael Fischbein.
*
* 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.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <fts.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include <libxo/xo.h>
#include "ls.h"
#include "extern.h"
int
prn_normal(const char *field, const char *s)
{
char fmt[_POSIX2_LINE_MAX];
snprintf(fmt, sizeof(fmt), "{:%s/%%hs}", field);
return xo_emit(fmt, s);
#if 0
mbstate_t mbs;
wchar_t wc;
int i, n;
size_t clen;
memset(&mbs, 0, sizeof(mbs));
n = 0;
while ((clen = mbrtowc(&wc, s, MB_LEN_MAX, &mbs)) != 0) {
if (clen == (size_t)-2) {
n += printf("%s", s);
break;
}
if (clen == (size_t)-1) {
memset(&mbs, 0, sizeof(mbs));
putchar((unsigned char)*s);
s++;
n++;
continue;
}
for (i = 0; i < (int)clen; i++)
putchar((unsigned char)s[i]);
s += clen;
if (iswprint(wc))
n += wcwidth(wc);
}
return (n);
#endif
}
char *
get_printable(const char *s)
{
mbstate_t mbs;
wchar_t wc;
int i, n;
size_t clen;
int slen = strlen(s);
char *buf = alloca(slen + 1), *bp = buf;
memset(&mbs, 0, sizeof(mbs));
n = 0;
while ((clen = mbrtowc(&wc, s, MB_LEN_MAX, &mbs)) != 0) {
if (clen == (size_t)-1) {
*bp++ = '?';
s++;
n++;
memset(&mbs, 0, sizeof(mbs));
continue;
}
if (clen == (size_t)-2) {
*bp++ = '?';
n++;
break;
}
if (!iswprint(wc)) {
*bp++ = '?';
s += clen;
n++;
continue;
}
for (i = 0; i < (int)clen; i++)
*bp++ = (unsigned char)s[i];
s += clen;
n += wcwidth(wc);
}
*bp = '\0';
return strdup(buf);
}
/*
* The fts system makes it difficult to replace fts_name with a different-
* sized string, so we just calculate the real length here and do the
* conversion in prn_octal()
*
* XXX when using f_octal_escape (-b) rather than f_octal (-B), the
* length computed by len_octal may be too big. I just can't be buggered
* to fix this as an efficient fix would involve a lookup table. Same goes
* for the rather inelegant code in prn_octal.
*
* DES 1998/04/23
*/
size_t
len_octal(const char *s, int len)
{
mbstate_t mbs;
wchar_t wc;
size_t clen, r;
memset(&mbs, 0, sizeof(mbs));
r = 0;
while (len != 0 && (clen = mbrtowc(&wc, s, len, &mbs)) != 0) {
if (clen == (size_t)-1) {
r += 4;
s++;
len--;
memset(&mbs, 0, sizeof(mbs));
continue;
}
if (clen == (size_t)-2) {
r += 4 * len;
break;
}
if (iswprint(wc))
r++;
else
r += 4 * clen;
s += clen;
}
return (r);
}
char *
get_octal(const char *s)
{
static const char esc[] = "\\\\\"\"\aa\bb\ff\nn\rr\tt\vv";
const char *p;
mbstate_t mbs;
wchar_t wc;
size_t clen;
unsigned char ch;
int goodchar, i, len, prtlen;
int slen = strlen(s);
char *buf = alloca(slen * 4 + 1), *bp = buf;
memset(&mbs, 0, sizeof(mbs));
len = 0;
while ((clen = mbrtowc(&wc, s, MB_LEN_MAX, &mbs)) != 0) {
goodchar = clen != (size_t)-1 && clen != (size_t)-2;
if (goodchar && iswprint(wc) && wc != L'\"' && wc != L'\\') {
for (i = 0; i < (int)clen; i++)
*bp++ = (unsigned char)s[i];
len += wcwidth(wc);
} else if (goodchar && f_octal_escape &&
#if WCHAR_MIN < 0
wc >= 0 &&
#endif
wc <= (wchar_t)UCHAR_MAX &&
(p = strchr(esc, (char)wc)) != NULL) {
*bp ++ = '\\';
*bp++ = p[1];
len += 2;
} else {
if (goodchar)
prtlen = clen;
else if (clen == (size_t)-1)
prtlen = 1;
else
prtlen = strlen(s);
for (i = 0; i < prtlen; i++) {
ch = (unsigned char)s[i];
*bp++ = '\\';
*bp++ = '0' + (ch >> 6);
*bp++ = '0' + ((ch >> 3) & 7);
*bp++ = '0' + (ch & 7);
len += 4;
}
}
if (clen == (size_t)-2)
break;
if (clen == (size_t)-1) {
memset(&mbs, 0, sizeof(mbs));
s++;
} else
s += clen;
}
*bp = '\0';
return strdup(buf);
}
void
usage(void)
{
xo_error(
#ifdef COLORLS
"usage: ls [-ABCFGHILPRSTUWZabcdfghiklmnopqrstuwxy1,] [-D format]"
#else
"usage: ls [-ABCFHILPRSTUWZabcdfghiklmnopqrstuwxy1,] [-D format]"
#endif
" [file ...]\n");
exit(1);
}