text: /*
   * 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: releng/11.0/lib/libc/net/gai_strerror.c 199083 2009-11-09 12:46:59Z ume $");
  
  #include "namespace.h"
  #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
  #include "un-namespace.h"
  
  /* 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";
  }
  