mirror of
git://git.sv.gnu.org/findutils.git
synced 2025-09-09 18:08:45 +02:00
Bernhard Voelker
f1f6471ae8
Run 'make update-copyright'. * lib/regexprops.c (copying): Update the year number manually. * tests/sample-test: Adjust to use the single most recent year. * All other files: Update copyright years via the above make run.
218 lines
6.7 KiB
C
218 lines
6.7 KiB
C
/* qmark.c -- quote 'dangerous' filenames
|
|
Derived from coreutils' ls.c.
|
|
Copyright (C) 1985-2025 Free Software Foundation, Inc.
|
|
|
|
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 3 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, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
/* config.h must be included first. */
|
|
#include <config.h>
|
|
|
|
/* system headers. */
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
|
|
/* gnulib headers would go here if any needed to be included. */
|
|
|
|
/* find headers. */
|
|
#include "printquoted.h"
|
|
|
|
|
|
|
|
/*
|
|
This comment, IN_CTYPE_DOMAIN and ISPRINT were borrowed from
|
|
coreutils at Sun Jun 5 21:17:40 2005 UTC.
|
|
|
|
Jim Meyering writes:
|
|
|
|
"... Some ctype macros are valid only for character codes that
|
|
isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
|
|
using /bin/cc or gcc but without giving an ansi option). So, all
|
|
ctype uses should be through macros like ISPRINT... If
|
|
STDC_HEADERS is defined, then autoconf has verified that the ctype
|
|
macros don't need to be guarded with references to isascii. ...
|
|
Defining isascii to 1 should let any compiler worth its salt
|
|
eliminate the && through constant folding."
|
|
|
|
Bruno Haible adds:
|
|
|
|
"... Furthermore, isupper(c) etc. have an undefined result if c is
|
|
outside the range -1 <= c <= 255. One is tempted to write isupper(c)
|
|
with c being of type `char', but this is wrong if c is an 8-bit
|
|
character >= 128 which gets sign-extended to a negative value.
|
|
The macro ISUPPER protects against this as well."
|
|
|
|
(Actually that rule of ISUPPER is now taken by to_uchar).
|
|
*/
|
|
|
|
#if STDC_HEADERS
|
|
# define IN_CTYPE_DOMAIN(c) 1
|
|
#else
|
|
# define IN_CTYPE_DOMAIN(c) isascii(c)
|
|
#endif
|
|
|
|
/* ISPRINT is defined in <sys/euc.h> on at least Solaris2.6 systems. */
|
|
#undef ISPRINT
|
|
#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
|
|
|
|
|
|
|
|
|
|
|
|
/* Convert a possibly-signed character to an unsigned character. This is
|
|
* a bit safer than casting to unsigned char, since it catches some type
|
|
* errors that the cast doesn't.
|
|
*
|
|
* This code taken from coreutils' system.h header at
|
|
* Sun Jun 5 21:05:21 2005 UTC.
|
|
*/
|
|
static inline unsigned char to_uchar (char ch)
|
|
{
|
|
return ch;
|
|
}
|
|
|
|
|
|
static size_t
|
|
unibyte_qmark_chars (char *buf, size_t len)
|
|
{
|
|
char *p = buf;
|
|
char const *plimit = buf + len;
|
|
|
|
while (p < plimit)
|
|
{
|
|
if (! ISPRINT (to_uchar (*p)))
|
|
*p = '?';
|
|
p++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Scan BUF, replacing any dangerous-looking characters with question
|
|
* marks. This code is taken from the ls.c file in coreutils as at
|
|
* Sun Jun 5 20:51:54 2005 UTC.
|
|
*
|
|
* This function may shrink the buffer. Either way, the new length
|
|
* is returned.
|
|
*/
|
|
size_t
|
|
qmark_chars (char *buf, size_t len)
|
|
{
|
|
if (MB_CUR_MAX <= 1)
|
|
{
|
|
return unibyte_qmark_chars (buf, len);
|
|
}
|
|
else
|
|
{
|
|
char const *p = buf;
|
|
char const *plimit = buf + len;
|
|
char *q = buf;
|
|
|
|
while (p < plimit)
|
|
switch (*p)
|
|
{
|
|
case ' ': case '!': case '"': case '#': case '%':
|
|
case '&': case '\'': case '(': case ')': case '*':
|
|
case '+': case ',': case '-': case '.': case '/':
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
case ':': case ';': case '<': case '=': case '>':
|
|
case '?':
|
|
case 'A': case 'B': case 'C': case 'D': case 'E':
|
|
case 'F': case 'G': case 'H': case 'I': case 'J':
|
|
case 'K': case 'L': case 'M': case 'N': case 'O':
|
|
case 'P': case 'Q': case 'R': case 'S': case 'T':
|
|
case 'U': case 'V': case 'W': case 'X': case 'Y':
|
|
case 'Z':
|
|
case '[': case '\\': case ']': case '^': case '_':
|
|
case 'a': case 'b': case 'c': case 'd': case 'e':
|
|
case 'f': case 'g': case 'h': case 'i': case 'j':
|
|
case 'k': case 'l': case 'm': case 'n': case 'o':
|
|
case 'p': case 'q': case 'r': case 's': case 't':
|
|
case 'u': case 'v': case 'w': case 'x': case 'y':
|
|
case 'z': case '{': case '|': case '}': case '~':
|
|
/* These characters are printable ASCII characters. */
|
|
*q++ = *p++;
|
|
break;
|
|
default:
|
|
/* If we have a multibyte sequence, copy it until we
|
|
reach its end, replacing each non-printable multibyte
|
|
character with a single question mark. */
|
|
{
|
|
mbstate_t mbstate;
|
|
memset (&mbstate, 0, sizeof mbstate);
|
|
do
|
|
{
|
|
wchar_t wc;
|
|
size_t bytes;
|
|
int w;
|
|
|
|
bytes = mbrtowc (&wc, p, plimit - p, &mbstate);
|
|
|
|
if (bytes == (size_t) -1)
|
|
{
|
|
/* An invalid multibyte sequence was
|
|
encountered. Skip one input byte, and
|
|
put a question mark. */
|
|
p++;
|
|
*q++ = '?';
|
|
break;
|
|
}
|
|
|
|
if (bytes == (size_t) -2)
|
|
{
|
|
/* An incomplete multibyte character
|
|
at the end. Replace it entirely with
|
|
a question mark. */
|
|
p = plimit;
|
|
*q++ = '?';
|
|
break;
|
|
}
|
|
|
|
if (bytes == 0)
|
|
/* A null wide character was encountered. */
|
|
bytes = 1;
|
|
|
|
w = wcwidth (wc);
|
|
if (w >= 0)
|
|
{
|
|
/* A printable multibyte character.
|
|
Keep it. */
|
|
for (; bytes > 0; --bytes)
|
|
*q++ = *p++;
|
|
}
|
|
else
|
|
{
|
|
/* An unprintable multibyte character.
|
|
Replace it entirely with a question
|
|
mark. */
|
|
p += bytes;
|
|
*q++ = '?';
|
|
}
|
|
}
|
|
while (! mbsinit (&mbstate));
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* The buffer may have shrunk. */
|
|
len = q - buf;
|
|
return len;
|
|
}
|
|
}
|