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 #include "namespace.h" 37 #if defined(NLS) 38 #include <nl_types.h> 39 #endif 40 #include <limits.h> 41 #include <errno.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <signal.h> 45 #include "reentrant.h" 46 #include "un-namespace.h" 47 48 #define UPREFIX "Unknown signal" 49 50 static char sig_ebuf[NL_TEXTMAX]; 51 static char sig_ebuf_err[NL_TEXTMAX]; 52 static once_t sig_init_once = ONCE_INITIALIZER; 53 static thread_key_t sig_key; 54 static int sig_keycreated = 0; 55 56 static void 57 sig_keycreate(void) 58 { 59 sig_keycreated = (thr_keycreate(&sig_key, free) == 0); 60 } 61 62 static char * 63 sig_tlsalloc(void) 64 { 65 char *ebuf = NULL; 66 67 if (thr_main() != 0) 68 ebuf = sig_ebuf; 69 else { 70 if (thr_once(&sig_init_once, sig_keycreate) != 0 || 71 !sig_keycreated) 72 goto thr_err; 73 if ((ebuf = thr_getspecific(sig_key)) == NULL) { 74 if ((ebuf = malloc(sizeof(sig_ebuf))) == NULL) 75 goto thr_err; 76 if (thr_setspecific(sig_key, ebuf) != 0) { 77 free(ebuf); 78 ebuf = NULL; 79 goto thr_err; 80 } 81 } 82 } 83 thr_err: 84 if (ebuf == NULL) 85 ebuf = sig_ebuf_err; 86 return (ebuf); 87 } 88 89 /* XXX: negative 'num' ? (REGR) */ 90 char * 91 strsignal(int num) 92 { 93 char *ebuf; 94 char tmp[20]; 95 size_t n; 96 int signum; 97 char *t, *p; 98 99 #if defined(NLS) 100 int saved_errno = errno; 101 nl_catd catd; 102 catd = catopen("libc", NL_CAT_LOCALE); 103 #endif 104 105 ebuf = sig_tlsalloc(); 106 107 if (num > 0 && num < sys_nsig) { 108 n = strlcpy(ebuf, 109 #if defined(NLS) 110 catgets(catd, 2, num, sys_siglist[num]), 111 #else 112 sys_siglist[num], 113 #endif 114 sizeof(sig_ebuf)); 115 } else { 116 n = strlcpy(ebuf, 117 #if defined(NLS) 118 catgets(catd, 2, 0xffff, UPREFIX), 119 #else 120 UPREFIX, 121 #endif 122 sizeof(sig_ebuf)); 123 124 signum = num; 125 if (num < 0) 126 signum = -signum; 127 128 t = tmp; 129 do { 130 *t++ = "0123456789"[signum % 10]; 131 } while (signum /= 10); 132 if (num < 0) 133 *t++ = '-'; 134 135 p = (ebuf + n); 136 *p++ = ':'; 137 *p++ = ' '; 138 139 for (;;) { 140 *p++ = *--t; 141 if (t <= tmp) 142 break; 143 } 144 *p = '\0'; 145 } 146 147 #if defined(NLS) 148 catclose(catd); 149 errno = saved_errno; 150 #endif 151 return (ebuf); 152 } 153