1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include "namespace.h"
39 #if defined(NLS)
40 #include <nl_types.h>
41 #endif
42 #include <limits.h>
43 #include <errno.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <signal.h>
47 #include "reentrant.h"
48 #include "un-namespace.h"
49
50 #define UPREFIX "Unknown signal"
51
52 static char sig_ebuf[NL_TEXTMAX];
53 static char sig_ebuf_err[NL_TEXTMAX];
54 static once_t sig_init_once = ONCE_INITIALIZER;
55 static thread_key_t sig_key;
56 static int sig_keycreated = 0;
57
58 static void
sig_keycreate(void)59 sig_keycreate(void)
60 {
61 sig_keycreated = (thr_keycreate(&sig_key, free) == 0);
62 }
63
64 static char *
sig_tlsalloc(void)65 sig_tlsalloc(void)
66 {
67 char *ebuf = NULL;
68
69 if (thr_main() != 0)
70 ebuf = sig_ebuf;
71 else {
72 if (thr_once(&sig_init_once, sig_keycreate) != 0 ||
73 !sig_keycreated)
74 goto thr_err;
75 if ((ebuf = thr_getspecific(sig_key)) == NULL) {
76 if ((ebuf = malloc(sizeof(sig_ebuf))) == NULL)
77 goto thr_err;
78 if (thr_setspecific(sig_key, ebuf) != 0) {
79 free(ebuf);
80 ebuf = NULL;
81 goto thr_err;
82 }
83 }
84 }
85 thr_err:
86 if (ebuf == NULL)
87 ebuf = sig_ebuf_err;
88 return (ebuf);
89 }
90
91 /* XXX: negative 'num' ? (REGR) */
92 char *
strsignal(int num)93 strsignal(int num)
94 {
95 char *ebuf;
96 char tmp[20];
97 size_t n;
98 int signum;
99 char *t, *p;
100
101 #if defined(NLS)
102 int saved_errno = errno;
103 nl_catd catd;
104 catd = catopen("libc", NL_CAT_LOCALE);
105 #endif
106
107 ebuf = sig_tlsalloc();
108
109 if (num > 0 && num < sys_nsig) {
110 n = strlcpy(ebuf,
111 #if defined(NLS)
112 catgets(catd, 2, num, sys_siglist[num]),
113 #else
114 sys_siglist[num],
115 #endif
116 sizeof(sig_ebuf));
117 } else {
118 n = strlcpy(ebuf,
119 #if defined(NLS)
120 catgets(catd, 2, 0xffff, UPREFIX),
121 #else
122 UPREFIX,
123 #endif
124 sizeof(sig_ebuf));
125
126 signum = num;
127 if (num < 0)
128 signum = -signum;
129
130 t = tmp;
131 do {
132 *t++ = "0123456789"[signum % 10];
133 } while (signum /= 10);
134 if (num < 0)
135 *t++ = '-';
136
137 p = (ebuf + n);
138 *p++ = ':';
139 *p++ = ' ';
140
141 for (;;) {
142 *p++ = *--t;
143 if (t <= tmp)
144 break;
145 }
146 *p = '\0';
147 }
148
149 #if defined(NLS)
150 catclose(catd);
151 errno = saved_errno;
152 #endif
153 return (ebuf);
154 }
155