supported compilation on Solaris (contributed by James Carlson)

7 files changed, 546 insertions, 0 deletions

diff --git a/missing/arc4random.h b/missing/arc4random.h
index 7487efa..074c100 100644
--- a/missing/arc4random.h
+++ b/missing/arc4random.h
@@ -29,4 +29,9 @@
  * SUCH DAMAGE.
  */
 
+#ifdef __sun__
+#define	__P(x)	x
+typedef uint32_t u_int32_t;
+#endif
+
 extern u_int32_t arc4random __P((void));
diff --git a/missing/daemon.c b/missing/daemon.c
new file mode 100644
index 0000000..9bf6416
--- /dev/null
+++ b/missing/daemon.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2006 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/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int
+daemon(int nochdir, int noclose)
+{
+	if (fork() != 0)
+		_exit(0);
+	if (nochdir == 0)
+		(void) chdir("/");
+	if (noclose == 0) {
+		(void) close(0);
+		(void) open("/dev/null", O_RDWR);
+		(void) dup2(0, 1);
+		(void) dup2(0, 2);
+	}
+	(void) setsid();
+	if (fork() != 0)
+		_exit(0);
+	return (0);
+}
diff --git a/missing/err.h b/missing/err.h
new file mode 100644
index 0000000..dfc41d5
--- /dev/null
+++ b/missing/err.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2006 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.
+ */
+
+extern void err(int, const char *);
+/* PRINTFLIKE2 */
+extern void errx(int, const char *, ...);
+/* PRINTFLIKE1 */
+extern void warnx(const char *, ...);
+#define warn warnx
diff --git a/missing/getifaddrs.c b/missing/getifaddrs.c
new file mode 100644
index 0000000..4320c43
--- /dev/null
+++ b/missing/getifaddrs.c
@@ -0,0 +1,217 @@
+/*
+ * Copyright (c) 2006 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 <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/sockio.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include "ifaddrs.h"
+
+static int
+get_lifreq(int fd, struct lifreq **ifr_ret)
+{
+	struct lifnum lifn;
+	struct lifconf lifc;
+	struct lifreq *lifrp;
+
+	lifn.lifn_family = AF_UNSPEC;
+	lifn.lifn_flags = 0;
+	if (ioctl(fd, SIOCGLIFNUM, &lifn) == -1)
+		lifn.lifn_count = 16;
+	else
+		lifn.lifn_count += 16;
+
+	for (;;) {
+		lifc.lifc_len = lifn.lifn_count * sizeof (*lifrp);
+		lifrp = malloc(lifc.lifc_len);
+		if (lifrp == NULL)
+			return (-1);
+
+		lifc.lifc_family = AF_UNSPEC;
+		lifc.lifc_flags = 0;
+		lifc.lifc_buf = (char *)lifrp;
+		if (ioctl(fd, SIOCGLIFCONF, &lifc) == -1) {
+			free(lifrp);
+			if (errno == EINVAL) {
+				lifn.lifn_count <<= 1;
+				continue;
+			}
+			(void) close(fd);
+			return (-1);
+		}
+		if (lifc.lifc_len < (lifn.lifn_count - 1) * sizeof (*lifrp))
+			break;
+		free(lifrp);
+		lifn.lifn_count <<= 1;
+	}
+	(void) close(fd);
+
+	*ifr_ret = lifrp;
+
+	return (lifc.lifc_len / sizeof (*lifrp));
+}
+
+static size_t
+nbytes(const struct lifreq *lifrp, int nlif, size_t socklen)
+{
+	size_t len = 0;
+	size_t slen;
+
+	while (nlif > 0) {
+		slen = strlen(lifrp->lifr_name) + 1;
+		len += sizeof (struct ifaddrs) + ((slen + 3) & ~3);
+		len += 3 * socklen;
+		lifrp++;
+		nlif--;
+	}
+	return (len);
+}
+
+static struct sockaddr *
+addrcpy(struct sockaddr_storage *addr, char **bufp)
+{
+	char *buf = *bufp;
+	size_t len;
+
+	len = addr->ss_family == AF_INET ? sizeof (struct sockaddr_in) :
+	    sizeof (struct sockaddr_in6);
+	(void) memcpy(buf, addr, len);
+	*bufp = buf + len;
+	return ((struct sockaddr *)buf);
+}
+
+static int
+populate(struct ifaddrs *ifa, int fd, struct lifreq *lifrp, int nlif, int af,
+    char **bufp)
+{
+	char *buf = *bufp;
+	size_t slen;
+
+	while (nlif > 0) {
+		ifa->ifa_next = (nlif > 1) ? ifa + 1 : NULL;
+		(void) strcpy(ifa->ifa_name = buf, lifrp->lifr_name);
+		slen = strlen(lifrp->lifr_name) + 1;
+		buf += (slen + 3) & ~3;
+		if (ioctl(fd, SIOCGLIFFLAGS, lifrp) == -1)
+			ifa->ifa_flags = 0;
+		else
+			ifa->ifa_flags = lifrp->lifr_flags;
+		if (ioctl(fd, SIOCGLIFADDR, lifrp) == -1)
+			ifa->ifa_addr = NULL;
+		else
+			ifa->ifa_addr = addrcpy(&lifrp->lifr_addr, &buf);
+		if (ioctl(fd, SIOCGLIFNETMASK, lifrp) == -1)
+			ifa->ifa_netmask = NULL;
+		else
+			ifa->ifa_netmask = addrcpy(&lifrp->lifr_addr, &buf);
+		if (ifa->ifa_flags & IFF_POINTOPOINT) {
+			if (ioctl(fd, SIOCGLIFDSTADDR, lifrp) == -1)
+				ifa->ifa_dstaddr = NULL;
+			else
+				ifa->ifa_dstaddr =
+				    addrcpy(&lifrp->lifr_dstaddr, &buf);
+		} else if (ifa->ifa_flags & IFF_BROADCAST) {
+			if (ioctl(fd, SIOCGLIFBRDADDR, lifrp) == -1)
+				ifa->ifa_broadaddr = NULL;
+			else
+				ifa->ifa_broadaddr =
+				    addrcpy(&lifrp->lifr_broadaddr, &buf);
+		} else {
+			ifa->ifa_dstaddr = NULL;
+		}
+
+		ifa++;
+		nlif--;
+		lifrp++;
+	}
+	*bufp = buf;
+	return (0);
+}
+
+int
+getifaddrs(struct ifaddrs **ifap)
+{
+	int fd4, fd6;
+	int nif4, nif6 = 0;
+	struct lifreq *ifr4 = NULL;
+	struct lifreq *ifr6 = NULL;
+	struct ifaddrs *ifa = NULL;
+	char *buf;
+
+	if ((fd4 = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
+		return (-1);
+	if ((fd6 = socket(AF_INET6, SOCK_DGRAM, 0)) == -1 &&
+	    errno != EAFNOSUPPORT) {
+		(void) close(fd4);
+		return (-1);
+	}
+
+	if ((nif4 = get_lifreq(fd4, &ifr4)) == -1 ||
+	    (fd6 != -1 && (nif6 = get_lifreq(fd6, &ifr6)) == -1))
+		goto failure;
+
+	if (nif4 == 0 && nif6 == 0) {
+		*ifap = NULL;
+		return (0);
+	}
+
+	ifa = malloc(nbytes(ifr4, nif4, sizeof (struct sockaddr_in)) +
+	    nbytes(ifr6, nif6, sizeof (struct sockaddr_in6)));
+	if (ifa == NULL)
+		goto failure;
+
+	buf = (char *)(ifa + nif4 + nif6);
+
+	if (populate(ifa, fd4, ifr4, nif4, AF_INET, &buf) == -1)
+		goto failure;
+	if (nif4 > 0 && nif6 > 0)
+		ifa[nif4 - 1].ifa_next = ifa + nif4;
+	if (populate(ifa + nif4, fd6, ifr6, nif6, AF_INET6, &buf) == -1)
+		goto failure;
+
+	return (0);
+
+failure:
+	free(ifa);
+	(void) close(fd4);
+	if (fd6 != -1)
+		(void) close(fd6);
+	free(ifr4);
+	free(ifr6);
+	return (-1);
+}
+
+void
+freeifaddrs(struct ifaddrs *ifa)
+{
+	free(ifa);
+}
diff --git a/missing/ifaddrs.h b/missing/ifaddrs.h
new file mode 100644
index 0000000..0bf5f92
--- /dev/null
+++ b/missing/ifaddrs.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2006 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/types.h>
+
+#undef ifa_broadaddr
+#undef ifa_dstaddr
+struct ifaddrs {
+	struct ifaddrs	*ifa_next;	/* Pointer to next struct */
+	char		*ifa_name;	/* Interface name */
+	uint64_t	ifa_flags;	/* Interface flags */
+	struct sockaddr	*ifa_addr;	/* Interface address */
+	struct sockaddr	*ifa_netmask;	/* Interface netmask */
+	struct sockaddr	*ifa_dstaddr;	/* P2P interface destination */
+};
+#define	ifa_broadaddr	ifa_dstaddr
+
+extern int getifaddrs(struct ifaddrs **);
+extern void freeifaddrs(struct ifaddrs *);
diff --git a/missing/sys/queue.h b/missing/sys/queue.h
new file mode 100644
index 0000000..027f495
--- /dev/null
+++ b/missing/sys/queue.h
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ * Adapted from FreeBSD sys/queue.h by James Carlson <james.d.carlson@sun.com>
+ *
+ *	@(#)queue.h	8.5 (Berkeley) 8/20/94
+ * $FreeBSD: src/sys/sys/queue.h,v 1.32.2.6 2001/12/18 10:09:02 ru Exp $
+ */
+
+/*
+ * Tail queue declarations.
+ */
+#define	TAILQ_HEAD(name, type)						\
+struct name {								\
+	struct type *tqh_first;	/* first element */			\
+	struct type **tqh_last;	/* addr of last next element */		\
+}
+
+#define	TAILQ_ENTRY(type)						\
+struct {								\
+	struct type *tqe_next;	/* next element */			\
+	struct type **tqe_prev;	/* address of previous next element */	\
+}
+
+/*
+ * Tail queue functions.
+ */
+#define	TAILQ_EMPTY(head)	((head)->tqh_first == NULL)
+
+#define	TAILQ_FIRST(head)	((head)->tqh_first)
+
+#define	TAILQ_INIT(head) do {						\
+	TAILQ_FIRST((head)) = NULL;					\
+	(head)->tqh_last = &TAILQ_FIRST((head));			\
+} while (0)
+
+#define	TAILQ_INSERT_HEAD(head, elm, field) do {			\
+	if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL)	\
+		TAILQ_FIRST((head))->field.tqe_prev =			\
+		    &TAILQ_NEXT((elm), field);				\
+	else								\
+		(head)->tqh_last = &TAILQ_NEXT((elm), field);		\
+	TAILQ_FIRST((head)) = (elm);					\
+	(elm)->field.tqe_prev = &TAILQ_FIRST((head));			\
+} while (0)
+
+#define	TAILQ_INSERT_TAIL(head, elm, field) do {			\
+	TAILQ_NEXT((elm), field) = NULL;				\
+	(elm)->field.tqe_prev = (head)->tqh_last;			\
+	*(head)->tqh_last = (elm);					\
+	(head)->tqh_last = &TAILQ_NEXT((elm), field);			\
+} while (0)
+
+#define	TAILQ_LAST(head, headname)					\
+	(*(((struct headname *)((head)->tqh_last))->tqh_last))
+
+#define	TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
+
+#define	TAILQ_REMOVE(head, elm, field) do {				\
+	if ((TAILQ_NEXT((elm), field)) != NULL)				\
+		TAILQ_NEXT((elm), field)->field.tqe_prev = 		\
+		    (elm)->field.tqe_prev;				\
+	else								\
+		(head)->tqh_last = (elm)->field.tqe_prev;		\
+	*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field);		\
+} while (0)
+
+/*
+ * List declarations.
+ */
+#define LIST_HEAD(name, type)						\
+struct name {								\
+	 struct type *lh_first;	/* first element */			\
+}
+
+#define LIST_ENTRY(type)						\
+struct {								\
+	 struct type *le_next;	/* next element */			\
+	 struct type **le_prev;	/* address of previous next element */	\
+}
+
+/*
+ * List functions.
+ */
+
+#define LIST_EMPTY(head)	((head)->lh_first == NULL)
+
+#define LIST_FIRST(head)	((head)->lh_first)
+
+#define LIST_INIT(head) do {						\
+	 LIST_FIRST((head)) = NULL;					\
+} while (0)
+
+#define LIST_INSERT_HEAD(head, elm, field) do {				\
+	 if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL)	\
+		 LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);\
+	 LIST_FIRST((head)) = (elm);					\
+	 (elm)->field.le_prev = &LIST_FIRST((head));			\
+} while (0)
+
+#define LIST_NEXT(elm, field)	((elm)->field.le_next)
+
+#define LIST_REMOVE(elm, field) do {					\
+	 if (LIST_NEXT((elm), field) != NULL)				\
+		 LIST_NEXT((elm), field)->field.le_prev =		\
+		     (elm)->field.le_prev;				\
+	 *(elm)->field.le_prev = LIST_NEXT((elm), field);		\
+} while (0)
diff --git a/missing/warnx.c b/missing/warnx.c
new file mode 100644
index 0000000..75e1a96
--- /dev/null
+++ b/missing/warnx.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2006 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 <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+void
+err(int retv, const char *str)
+{
+	(void) fprintf(stderr, "%s\n", str);
+	exit(retv);
+}
+
+void
+errx(int retv, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	(void) vfprintf(stderr, fmt, args);
+	va_end(args);
+	exit(retv);
+}
+
+void
+warnx(const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	(void) vfprintf(stderr, fmt, args);
+	va_end(args);
+}