1 /* $NetBSD: util.c,v 1.34 2011/08/29 14:44:21 joerg Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Michael Fischbein.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)util.c 8.5 (Berkeley) 4/28/95";
39 #else
40 __RCSID("$NetBSD: util.c,v 1.34 2011/08/29 14:44:21 joerg Exp $");
41 #endif
42 #endif /* not lint */
43
44 #include <sys/types.h>
45 #include <sys/stat.h>
46
47 #include <err.h>
48 #include <fts.h>
49 #include <limits.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <vis.h>
54 #include <wchar.h>
55 #include <wctype.h>
56
57 #include "ls.h"
58 #include "extern.h"
59
60 int
safe_print(const char * src)61 safe_print(const char *src)
62 {
63 size_t len;
64 char *name;
65 int flags;
66
67 flags = VIS_NL | VIS_OCTAL | VIS_WHITE;
68 if (f_octal_escape)
69 flags |= VIS_CSTYLE;
70
71 len = strlen(src);
72 if (len != 0 && SIZE_T_MAX/len <= 4) {
73 errx(EXIT_FAILURE, "%s: name too long", src);
74 /* NOTREACHED */
75 }
76
77 name = (char *)malloc(4*len+1);
78 if (name != NULL) {
79 len = strvis(name, src, flags);
80 (void)printf("%s", name);
81 free(name);
82 return len;
83 } else
84 errx(EXIT_FAILURE, "out of memory!");
85 /* NOTREACHED */
86 }
87
88 /*
89 * The reasons why we don't use putwchar(wc) here are:
90 * - If wc == L'\0', we need to restore the initial shift state, but
91 * the C language standard doesn't say that putwchar(L'\0') does.
92 * - It isn't portable to mix a wide-oriented function (i.e. getwchar)
93 * with byte-oriented functions (printf et al.) in same FILE.
94 */
95 static int
printwc(wchar_t wc,mbstate_t * pst)96 printwc(wchar_t wc, mbstate_t *pst)
97 {
98 size_t size;
99 char buf[MB_LEN_MAX];
100
101 size = wcrtomb(buf, wc, pst);
102 if (size == (size_t)-1) /* This shouldn't happen, but for sure */
103 return 0;
104 if (wc == L'\0') {
105 /* The following condition must be always true, but for sure */
106 if (size > 0 && buf[size - 1] == '\0')
107 --size;
108 }
109 if (size > 0)
110 fwrite(buf, 1, size, stdout);
111 return wc == L'\0' ? 0 : wcwidth(wc);
112 }
113
114 int
printescaped(const char * src)115 printescaped(const char *src)
116 {
117 int n = 0;
118 mbstate_t src_state, stdout_state;
119 /* The following +1 is to pass '\0' at the end of src to mbrtowc(). */
120 const char *endptr = src + strlen(src) + 1;
121
122 /*
123 * We have to reset src_state each time in this function, because
124 * the codeset of src pathname may not match with current locale.
125 * Note that if we pass NULL instead of src_state to mbrtowc(),
126 * there is no way to reset the state.
127 */
128 memset(&src_state, 0, sizeof(src_state));
129 memset(&stdout_state, 0, sizeof(stdout_state));
130 while (src < endptr) {
131 wchar_t wc;
132 size_t rv, span = endptr - src;
133
134 #if 0
135 /*
136 * XXX - we should fix libc instead.
137 * Theoretically this should work, but our current
138 * implementation of iso2022 module doesn't actually work
139 * as expected, if there are redundant escape sequences
140 * which exceed 32 bytes.
141 */
142 if (span > MB_CUR_MAX)
143 span = MB_CUR_MAX;
144 #endif
145 rv = mbrtowc(&wc, src, span, &src_state);
146 if (rv == 0) { /* assert(wc == L'\0'); */
147 /* The following may output a shift sequence. */
148 n += printwc(wc, &stdout_state);
149 break;
150 }
151 if (rv == (size_t)-1) { /* probably errno == EILSEQ */
152 n += printwc(L'?', &stdout_state);
153 /* try to skip 1byte, because there is no better way */
154 src++;
155 memset(&src_state, 0, sizeof(src_state));
156 } else if (rv == (size_t)-2) {
157 if (span < MB_CUR_MAX) { /* incomplete char */
158 n += printwc(L'?', &stdout_state);
159 break;
160 }
161 src += span; /* a redundant shift sequence? */
162 } else {
163 n += printwc(iswprint(wc) ? wc : L'?', &stdout_state);
164 src += rv;
165 }
166 }
167 return n;
168 }
169