diff options
Diffstat (limited to 'lib/libc/net/gai_strerror.c')
| -rw-r--r-- | lib/libc/net/gai_strerror.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/libc/net/gai_strerror.c b/lib/libc/net/gai_strerror.c new file mode 100644 index 000000000000..23f58b763573 --- /dev/null +++ b/lib/libc/net/gai_strerror.c @@ -0,0 +1,124 @@ +/*- + * 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 "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) were omitted from RFC 3493, + * but are or may be used as extensions or in old code. + */ +static const char *const ai_errlist[] = { + [0] = "Success", + [EAI_ADDRFAMILY] = "Address family for hostname not supported", + [EAI_AGAIN] = "Name could not be resolved at this time", + [EAI_BADFLAGS] = "Flags parameter had an invalid value", + [EAI_FAIL] = "Non-recoverable failure in name resolution", + [EAI_FAMILY] = "Address family not recognized", + [EAI_MEMORY] = "Memory allocation failure", + [EAI_NODATA] = "No address associated with hostname", + [EAI_NONAME] = "Name does not resolve", + [EAI_SERVICE] = "Service was not recognized for socket type", + [EAI_SOCKTYPE] = "Intended socket type was not recognized", + [EAI_SYSTEM] = "System error returned in errno", + [EAI_BADHINTS] = "Invalid value for hints", + [EAI_PROTOCOL] = "Resolved protocol is unknown", + [EAI_OVERFLOW] = "Argument buffer 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; + int saved_errno; + + saved_errno = errno; + 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); + errno = saved_errno; + return (buf); + +thr_err: + errno = saved_errno; +#endif + if (ecode >= 0 && ecode < EAI_MAX) + return (ai_errlist[ecode]); + return ("Unknown error"); +} |