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 "namespace.h"
36 #if defined(NLS)
37 #include <nl_types.h>
38 #endif
39 #include <limits.h>
40 #include <errno.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <signal.h>
44 #include "reentrant.h"
45 #include "un-namespace.h"
46
47 #define UPREFIX "Unknown signal"
48
49 static char sig_ebuf[NL_TEXTMAX];
50 static char sig_ebuf_err[NL_TEXTMAX];
51 static once_t sig_init_once = ONCE_INITIALIZER;
52 static thread_key_t sig_key;
53 static int sig_keycreated = 0;
54
55 static void
sig_keycreate(void)56 sig_keycreate(void)
57 {
58 sig_keycreated = (thr_keycreate(&sig_key, free) == 0);
59 }
60
61 static char *
sig_tlsalloc(void)62 sig_tlsalloc(void)
63 {
64 char *ebuf = NULL;
65
66 if (thr_main() != 0)
67 ebuf = sig_ebuf;
68 else {
69 if (thr_once(&sig_init_once, sig_keycreate) != 0 ||
70 !sig_keycreated)
71 goto thr_err;
72 if ((ebuf = thr_getspecific(sig_key)) == NULL) {
73 if ((ebuf = malloc(sizeof(sig_ebuf))) == NULL)
74 goto thr_err;
75 if (thr_setspecific(sig_key, ebuf) != 0) {
76 free(ebuf);
77 ebuf = NULL;
78 goto thr_err;
79 }
80 }
81 }
82 thr_err:
83 if (ebuf == NULL)
84 ebuf = sig_ebuf_err;
85 return (ebuf);
86 }
87
88 /* XXX: negative 'num' ? (REGR) */
89 char *
strsignal(int num)90 strsignal(int num)
91 {
92 char *ebuf;
93 char tmp[20];
94 size_t n;
95 int signum;
96 char *t, *p;
97
98 #if defined(NLS)
99 int saved_errno = errno;
100 nl_catd catd;
101 catd = catopen("libc", NL_CAT_LOCALE);
102 #endif
103
104 ebuf = sig_tlsalloc();
105
106 if (num > 0 && num < sys_nsig) {
107 n = strlcpy(ebuf,
108 #if defined(NLS)
109 catgets(catd, 2, num, sys_siglist[num]),
110 #else
111 sys_siglist[num],
112 #endif
113 sizeof(sig_ebuf));
114 } else {
115 n = strlcpy(ebuf,
116 #if defined(NLS)
117 catgets(catd, 2, 0xffff, UPREFIX),
118 #else
119 UPREFIX,
120 #endif
121 sizeof(sig_ebuf));
122
123 signum = num;
124 if (num < 0)
125 signum = -signum;
126
127 t = tmp;
128 do {
129 *t++ = "0123456789"[signum % 10];
130 } while (signum /= 10);
131 if (num < 0)
132 *t++ = '-';
133
134 p = (ebuf + n);
135 *p++ = ':';
136 *p++ = ' ';
137
138 for (;;) {
139 *p++ = *--t;
140 if (t <= tmp)
141 break;
142 }
143 *p = '\0';
144 }
145
146 #if defined(NLS)
147 catclose(catd);
148 errno = saved_errno;
149 #endif
150 return (ebuf);
151 }
152