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 59 sig_keycreate(void) 60 { 61 sig_keycreated = (thr_keycreate(&sig_key, free) == 0); 62 } 63 64 static char * 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 * 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