isc__strerror

config.h.in

@@ -16,7 +16,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: config.h.in,v 1.47 2001/08/16 06:19:56 marka Exp $ */
+/* $Id: config.h.in,v 1.48 2001/08/30 04:33:17 marka Exp $ */
 
 /***
  *** This file is not to be included by any public header files, because
@@ -173,3 +173,6 @@ int sigwait(const unsigned int *set, int *sig);
 
 /* Define if you have the socket library (-lsocket).  */
 #undef HAVE_LIBSOCKET
+
+/* Define if you have strerror in the C library. */
+#undef HAVE_STRERROR

configure.in

@@ -18,7 +18,7 @@ AC_DIVERT_PUSH(AC_DIVERSION_NOTICE)dnl
 esyscmd([sed "s/^/# /" COPYRIGHT])dnl
 AC_DIVERT_POP()dnl
 
-AC_REVISION($Revision: 1.294 $)
+AC_REVISION($Revision: 1.295 $)
 
 AC_INIT(lib/dns/name.c)
 AC_PREREQ(2.13)
@@ -198,7 +198,7 @@ AC_CHECK_HEADERS(fcntl.h sys/time.h unistd.h sys/sockio.h sys/select.h sys/sysct
 
 AC_C_CONST
 AC_C_INLINE
-AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME),)
+AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME))
 
 #
 # UnixWare 7.1.1 with the feature supplement to the UDK compiler
@@ -1345,6 +1345,7 @@ AC_CHECK_FUNC(vsnprintf,
 	 ISC_PLATFORM_NEEDVSNPRINTF="#define ISC_PLATFORM_NEEDVSNPRINTF 1"])
 AC_SUBST(ISC_PLATFORM_NEEDSTRSEP)
 AC_SUBST(ISC_PLATFORM_NEEDVSNPRINTF)
+AC_CHECK_FUNC(strerror, AC_DEFINE(HAVE_STRERROR))
 
 AC_SUBST(ISC_EXTRA_OBJS)
 AC_SUBST(ISC_EXTRA_SRCS)

lib/isc/unix/include/isc/strerror.h

+/*
+ * Copyright (C) 2001  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.
+ */
+
+/* $Id: strerror.h,v 1.1 2001/08/30 04:33:19 marka Exp $ */
+
+#ifndef ISC_STRERROR_H
+#define ISC_STRERROR_H
+
+#include <sys/types.h>
+
+#include <isc/lang.h>
+
+ISC_LANG_BEGINDECLS
+
+/*
+ * Provide a thread safe wrapper to strerrror().
+ * 'buf' is always returned.
+ *
+ * Requires:
+ * 	'buf' to be non NULL.
+ */
+char *
+isc__strerror(int num, char *buf, size_t bufsize);
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_STRERROR_H */

lib/isc/unix/strerror.c

+/*
+ * Copyright (C) 2001  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.
+ */
+
+/* $Id: strerror.c,v 1.1 2001/08/30 04:33:19 marka Exp $ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include <isc/mutex.h>
+#include <isc/once.h>
+#include <isc/print.h>
+#include <isc/strerror.h>
+#include <isc/util.h>
+
+#ifdef HAVE_STRERROR
+/*
+ * We need to do this this way for profiled locks.
+ */
+static isc_mutex_t isc_strerror_lock;
+static void init_lock(void) {
+	RUNTIME_CHECK(isc_mutex_init(&isc_strerror_lock) == ISC_R_SUCCESS);
+}
+#else
+extern const char * const sys_errlist[];
+extern const int sys_nerr;
+#endif
+
+char *
+isc__strerror(int num, char *buf, size_t size) {
+#ifdef HAVE_STRERROR
+	char *msg;
+	unsigned int unum = num;
+	static isc_once_t once = ISC_ONCE_INIT;
+
+	REQUIRE(buf != NULL);
+
+	RUNTIME_CHECK(isc_once_do(&once, init_lock) == ISC_R_SUCCESS);
+
+	LOCK(&isc_strerror_lock);
+	msg = strerror(num);
+	if (msg != NULL)
+		snprintf(buf, size, "%s", msg);
+	else
+		snprintf(buf, size, "Unknown error: %u", unum);
+	UNLOCK(&isc_strerror_lock);
+	return (buf);
+#else
+	unsigned int unum = num;
+	isc_once_t once = ISC_ONCE_INIT;
+	static lock;
+	
+	REQUIRE(buf != NULL);
+
+	if (num >= 0 && num < sys_nerr)
+		snprintf(buf, size, "%s", sys_errlist[num]);
+	else
+		snprintf(buf, size, "Unknown error: %u", unum);
+	return (buf);
+#endif
+}

util/copyrights

@@ -1936,6 +1936,7 @@
 ./lib/isc/unix/include/isc/netdb.h		C	1999,2000,2001
 ./lib/isc/unix/include/isc/offset.h		C	2000,2001
 ./lib/isc/unix/include/isc/stdtime.h		C	1999,2000,2001
+./lib/isc/unix/include/isc/strerror.h		C	2001
 ./lib/isc/unix/include/isc/syslog.h		C	1999,2000,2001
 ./lib/isc/unix/include/isc/time.h		C	1998,1999,2000,2001
 ./lib/isc/unix/interfaceiter.c			C	1999,2000,2001
@@ -1948,6 +1949,7 @@
 ./lib/isc/unix/socket_p.h			C	2000,2001
 ./lib/isc/unix/stdio.c				C	2000,2001
 ./lib/isc/unix/stdtime.c			C	1999,2000,2001
+./lib/isc/unix/strerror.c			C	2001
 ./lib/isc/unix/syslog.c				C	2001
 ./lib/isc/unix/time.c				C	1998,1999,2000,2001
 ./lib/isc/version.c				C	1998,1999,2000,2001