diff options
Diffstat (limited to 'contrib/bind/lib/irs/gai_strerror.c')
| -rw-r--r-- | contrib/bind/lib/irs/gai_strerror.c | 117 |
1 files changed, 79 insertions, 38 deletions
diff --git a/contrib/bind/lib/irs/gai_strerror.c b/contrib/bind/lib/irs/gai_strerror.c index f56c6f5..c487e68 100644 --- a/contrib/bind/lib/irs/gai_strerror.c +++ b/contrib/bind/lib/irs/gai_strerror.c @@ -1,45 +1,86 @@ /* -%%% copyright-cmetz-97 -This software is Copyright 1997-1998 by Craig Metz, All Rights Reserved. -The Inner Net License Version 2 applies to this software. -You should have received a copy of the license with this software. If -you didn't get a copy, you may request one from <license@inner.net>. - -*/ + * Copyright (c) 2001 by Internet Software Consortium. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS + * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE + * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ #include <port_before.h> #include <netdb.h> -#include <errno.h> #include <port_after.h> -char * -gai_strerror(int errnum) { - switch(errnum) { - case 0: - return "no error"; - case EAI_BADFLAGS: - return "invalid value for ai_flags"; - case EAI_NONAME: - return "name or service is not known"; - case EAI_AGAIN: - return "temporary failure in name resolution"; - case EAI_FAIL: - return "non-recoverable failure in name resolution"; - case EAI_NODATA: - return "no address associated with name"; - case EAI_FAMILY: - return "ai_family not supported"; - case EAI_SOCKTYPE: - return "ai_socktype not supported"; - case EAI_SERVICE: - return "service not supported for ai_socktype"; - case EAI_ADDRFAMILY: - return "address family for name not supported"; - case EAI_MEMORY: - return "memory allocation failure"; - case EAI_SYSTEM: - return "system error"; - default: - return "unknown error"; - }; +#ifdef DO_PTHREADS +#include <pthread.h> +#include <stdlib.h> +#endif + +static const char *gai_errlist[] = { + "no error", + "address family not supported for name",/* EAI_ADDRFAMILY */ + "temporary failure", /* EAI_AGAIN */ + "invalid flags", /* EAI_BADFLAGS */ + "permanent failure", /* EAI_FAIL */ + "address family not supported", /* EAI_FAMILY */ + "memory failure", /* EAI_MEMORY */ + "no address", /* EAI_NODATA */ + "unknown name or service", /* EAI_NONAME */ + "service not supported for socktype", /* EAI_SERVICE */ + "socktype not supported", /* EAI_SOCKTYPE */ + "system failure", /* EAI_SYSTEM */ + "bad hints", /* EAI_BADHINTS */ + "bad protocol", /* EAI_PROTOCOL */ + + "unknown error" /* Must be last. */ +}; + +static const int gai_nerr = (sizeof(gai_errlist)/sizeof(*gai_errlist)); + +#define EAI_BUFSIZE 128 + +const char * +gai_strerror(int ecode) { +#ifndef DO_PTHREADS + static char buf[EAI_BUFSIZE]; +#else /* DO_PTHREADS */ + static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; + static pthread_key_t key; + static int once = 0; + char *buf; +#endif + + if (ecode >= 0 && ecode < (gai_nerr - 1)) + return (gai_errlist[ecode]); + +#ifdef DO_PTHREADS + if (!once) { + pthread_mutex_lock(&lock); + if (!once++) + pthread_key_create(&key, free); + pthread_mutex_unlock(&lock); + } + + buf = pthread_getspecific(key); + if (buf == NULL) { + buf = malloc(EAI_BUFSIZE); + if (buf == NULL) + return ("unknown error"); + pthread_setspecific(key, buf); + } +#endif + /* + * XXX This really should be snprintf(buf, EAI_BUFSIZE, ...). + * It is safe until message catalogs are used. + */ + sprintf(buf, "%s: %d", gai_errlist[gai_nerr - 1], ecode); + return (buf); } |
