diff options
Diffstat (limited to 'libc/gai_strerror.c')
| -rw-r--r-- | libc/gai_strerror.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/libc/gai_strerror.c b/libc/gai_strerror.c new file mode 100644 index 0000000..070e237 --- /dev/null +++ b/libc/gai_strerror.c @@ -0,0 +1,125 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#ifndef __rtems__ +#include "namespace.h" +#endif /* __rtems */ +#include <netdb.h> +#if defined(NLS) +#include <nl_types.h> +#include <errno.h> +#include <limits.h> +#include <stdlib.h> +#include <string.h> +#include "reentrant.h" +#endif +#ifndef __rtems__ +#include "un-namespace.h" +#endif /* __rtems */ + +/* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */ +/* for backward compatibility with userland code prior to 2553bis-02 */ +static const char *ai_errlist[] = { + "Success", /* 0 */ + "Address family for hostname not supported", /* 1 */ + "Temporary failure in name resolution", /* EAI_AGAIN */ + "Invalid value for ai_flags", /* EAI_BADFLAGS */ + "Non-recoverable failure in name resolution", /* EAI_FAIL */ + "ai_family not supported", /* EAI_FAMILY */ + "Memory allocation failure", /* EAI_MEMORY */ + "No address associated with hostname", /* 7 */ + "hostname nor servname provided, or not known", /* EAI_NONAME */ + "servname not supported for ai_socktype", /* EAI_SERVICE */ + "ai_socktype not supported", /* EAI_SOCKTYPE */ + "System error returned in errno", /* EAI_SYSTEM */ + "Invalid value for hints", /* EAI_BADHINTS */ + "Resolved protocol is unknown", /* EAI_PROTOCOL */ + "Argument buffer overflow" /* EAI_OVERFLOW */ +}; + +#if defined(NLS) +static char gai_buf[NL_TEXTMAX]; +static once_t gai_init_once = ONCE_INITIALIZER; +static thread_key_t gai_key; +static int gai_keycreated = 0; + +static void +gai_keycreate(void) +{ + gai_keycreated = (thr_keycreate(&gai_key, free) == 0); +} +#endif + +const char * +gai_strerror(int ecode) +{ +#if defined(NLS) + nl_catd catd; + char *buf; + + if (thr_main() != 0) + buf = gai_buf; + else { + if (thr_once(&gai_init_once, gai_keycreate) != 0 || + !gai_keycreated) + goto thr_err; + if ((buf = thr_getspecific(gai_key)) == NULL) { + if ((buf = malloc(sizeof(gai_buf))) == NULL) + goto thr_err; + if (thr_setspecific(gai_key, buf) != 0) { + free(buf); + goto thr_err; + } + } + } + + catd = catopen("libc", NL_CAT_LOCALE); + if (ecode > 0 && ecode < EAI_MAX) + strlcpy(buf, catgets(catd, 3, ecode, ai_errlist[ecode]), + sizeof(gai_buf)); + else if (ecode == 0) + strlcpy(buf, catgets(catd, 3, NL_MSGMAX - 1, "Success"), + sizeof(gai_buf)); + else + strlcpy(buf, catgets(catd, 3, NL_MSGMAX, "Unknown error"), + sizeof(gai_buf)); + catclose(catd); + return buf; + +thr_err: +#endif + if (ecode >= 0 && ecode < EAI_MAX) + return ai_errlist[ecode]; + return "Unknown error"; +} |