libifconfig: style(9) fixes

Also switch from BSD 3-clause to 2-clause license where possible, and
consolidate duplicate 3-clause license into one.

Submitted by:	Marie Helene Kvello-Aune <marieheleneka@gmail.com>
Reviewed by:	cem, kp
Differential Revision:	https://reviews.freebsd.org/D7764

8 files changed, 185 insertions, 182 deletions

diff --git a/lib/libifconfig/libifconfig.c b/lib/libifconfig/libifconfig.c
index 5acb56c845ca..52afd8161f17 100644
--- a/lib/libifconfig/libifconfig.c
+++ b/lib/libifconfig/libifconfig.c
@@ -57,6 +57,8 @@
  * 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.
+ *
+ * $FreeBSD$
  */
 
 #include <sys/ioctl.h>
@@ -80,19 +82,17 @@ ifconfig_open(void)
 {
 	struct ifconfig_handle *h;
 
-	h = calloc(1, sizeof(struct ifconfig_handle));
-
+	h = calloc(1, sizeof(*h));
 	for (int i = 0; i <= AF_MAX; i++) {
 		h->sockets[i] = -1;
 	}
-
 	return (h);
 }
 
-
 void
 ifconfig_close(ifconfig_handle_t *h)
 {
+
 	for (int i = 0; i <= AF_MAX; i++) {
 		if (h->sockets[i] != -1) {
 			(void)close(h->sockets[i]);
@@ -101,37 +101,40 @@ ifconfig_close(ifconfig_handle_t *h)
 	free(h);
 }
 
-
 ifconfig_errtype
 ifconfig_err_errtype(ifconfig_handle_t *h)
 {
+
 	return (h->error.errtype);
 }
 
-
 int
 ifconfig_err_errno(ifconfig_handle_t *h)
 {
+
 	return (h->error.errcode);
 }
 
-
 unsigned long
 ifconfig_err_ioctlreq(ifconfig_handle_t *h)
 {
+
 	return (h->error.ioctl_request);
 }
 
-
 int
-ifconfig_get_description(ifconfig_handle_t *h, const char *name, char **description)
+ifconfig_get_description(ifconfig_handle_t *h, const char *name,
+    char **description)
 {
 	struct ifreq ifr;
-	char *descr = NULL;
-	size_t descrlen = 64;
+	char *descr;
+	size_t descrlen;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	descr = NULL;
+	descrlen = 64;
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+
 	for (;;) {
 		if ((descr = reallocf(descr, descrlen)) == NULL) {
 			h->error.errtype = OTHER;
@@ -141,8 +144,7 @@ ifconfig_get_description(ifconfig_handle_t *h, const char *name, char **descript
 
 		ifr.ifr_buffer.buffer = descr;
 		ifr.ifr_buffer.length = descrlen;
-		if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFDESCR,
-		    &ifr) != 0) {
+		if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFDESCR, &ifr) != 0) {
 			return (-1);
 		}
 
@@ -164,7 +166,6 @@ ifconfig_get_description(ifconfig_handle_t *h, const char *name, char **descript
 	return (-1);
 }
 
-
 int
 ifconfig_set_description(ifconfig_handle_t *h, const char *name,
     const char *newdescription)
@@ -172,7 +173,7 @@ ifconfig_set_description(ifconfig_handle_t *h, const char *name,
 	struct ifreq ifr;
 	int desclen;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	desclen = strlen(newdescription);
 
 	/*
@@ -184,46 +185,49 @@ ifconfig_set_description(ifconfig_handle_t *h, const char *name,
 	}
 
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
-
 	ifr.ifr_buffer.length = desclen + 1;
 	ifr.ifr_buffer.buffer = strdup(newdescription);
+
 	if (ifr.ifr_buffer.buffer == NULL) {
 		h->error.errtype = OTHER;
 		h->error.errcode = ENOMEM;
 		return (-1);
 	}
 
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR, &ifr) != 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR,
+	    &ifr) != 0) {
 		free(ifr.ifr_buffer.buffer);
 		return (-1);
 	}
+
 	free(ifr.ifr_buffer.buffer);
 	return (0);
 }
 
-
-int ifconfig_unset_description(ifconfig_handle_t *h, const char *name)
+int
+ifconfig_unset_description(ifconfig_handle_t *h, const char *name)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 	ifr.ifr_buffer.length = 0;
 	ifr.ifr_buffer.buffer = NULL;
 
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR, &ifr) < 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFDESCR,
+	    &ifr) < 0) {
 		return (-1);
 	}
 	return (0);
 }
 
-
-int ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newname)
+int
+ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newname)
 {
 	struct ifreq ifr;
 	char *tmpname;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	tmpname = strdup(newname);
 	if (tmpname == NULL) {
 		h->error.errtype = OTHER;
@@ -233,82 +237,96 @@ int ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newnam
 
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 	ifr.ifr_data = tmpname;
-
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFNAME, &ifr) != 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFNAME,
+	    &ifr) != 0) {
 		free(tmpname);
 		return (-1);
 	}
+
 	free(tmpname);
 	return (0);
 }
 
-
-int ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu)
+int
+ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 	ifr.ifr_mtu = mtu;
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMTU, &ifr) < 0) {
+
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMTU,
+	    &ifr) < 0) {
 		return (-1);
 	}
+
 	return (0);
 }
 
-
-int ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu)
+int
+ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMTU, &ifr) == -1) {
+
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMTU,
+	    &ifr) == -1) {
 		return (-1);
 	}
+
 	*mtu = ifr.ifr_mtu;
 	return (0);
 }
 
-
-int ifconfig_set_metric(ifconfig_handle_t *h, const char *name, const int mtu)
+int
+ifconfig_set_metric(ifconfig_handle_t *h, const char *name, const int mtu)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 	ifr.ifr_mtu = mtu;
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMETRIC, &ifr) < 0) {
+
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFMETRIC,
+	    &ifr) < 0) {
 		return (-1);
 	}
+
 	return (0);
 }
 
-
-int ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric)
+int
+ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMETRIC, &ifr) == -1) {
+
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFMETRIC,
+	    &ifr) == -1) {
 		return (-1);
 	}
+
 	*metric = ifr.ifr_metric;
 	return (0);
 }
 
-
-int ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
+int
+ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
     const int capability)
 {
 	struct ifreq ifr;
 	struct ifconfig_capabilities ifcap;
-	int flags;
-	int value;
+	int flags, value;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
-	if (ifconfig_get_capability(h, name, &ifcap) != 0) {
+	memset(&ifr, 0, sizeof(ifr));
+
+	if (ifconfig_get_capability(h, name,
+	    &ifcap) != 0) {
 		return (-1);
 	}
 
@@ -329,22 +347,24 @@ int ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
 	 * set for this request.
 	 */
 	ifr.ifr_reqcap = flags;
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFCAP, &ifr) < 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCSIFCAP,
+	    &ifr) < 0) {
 		return (-1);
 	}
 	return (0);
 }
 
-
-int ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
+int
+ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
     struct ifconfig_capabilities *capability)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFCAP, &ifr) < 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCGIFCAP,
+	    &ifr) < 0) {
 		return (-1);
 	}
 	capability->curcap = ifr.ifr_curcap;
@@ -352,26 +372,27 @@ int ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
 	return (0);
 }
 
-
-int ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name)
+int
+ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 
-	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFDESTROY, &ifr) < 0) {
+	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFDESTROY,
+	    &ifr) < 0) {
 		return (-1);
 	}
 	return (0);
 }
 
-
-int ifconfig_create_interface(ifconfig_handle_t *h, const char *name, char **ifname)
+int
+ifconfig_create_interface(ifconfig_handle_t *h, const char *name, char **ifname)
 {
 	struct ifreq ifr;
 
-	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&ifr, 0, sizeof(ifr));
 	(void)strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 
 	/*
@@ -379,19 +400,22 @@ int ifconfig_create_interface(ifconfig_handle_t *h, const char *name, char **ifn
 	 * Insert special snowflake handling here. See GitHub issue #12 for details.
 	 * In the meantime, hard-nosupport interfaces that need special handling.
 	 */
-	if ((strncmp(name, "wlan", strlen("wlan")) == 0) ||
-	    (strncmp(name, "vlan", strlen("vlan")) == 0) ||
-	    (strncmp(name, "vxlan", strlen("vxlan")) == 0)) {
+	if ((strncmp(name, "wlan",
+	    strlen("wlan")) == 0) ||
+	    (strncmp(name, "vlan",
+	    strlen("vlan")) == 0) ||
+	    (strncmp(name, "vxlan",
+	    strlen("vxlan")) == 0)) {
 		h->error.errtype = OTHER;
 		h->error.errcode = ENOSYS;
 		return (-1);
 	}
 
 	/* No special handling for this interface type. */
-
 	if (ifconfig_ioctlwrap(h, AF_LOCAL, SIOCIFCREATE2, &ifr) < 0) {
 		return (-1);
 	}
+
 	*ifname = strdup(ifr.ifr_name);
 	return (0);
 }
diff --git a/lib/libifconfig/libifconfig.h b/lib/libifconfig/libifconfig.h
index a005aa83b33c..de635334ad7a 100644
--- a/lib/libifconfig/libifconfig.h
+++ b/lib/libifconfig/libifconfig.h
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -50,7 +46,6 @@ struct ifconfig_capabilities {
 	int reqcap;
 };
 
-
 /** Retrieves a new state object for use in other API calls.
  * Example usage:
  *{@code
@@ -80,19 +75,18 @@ int ifconfig_err_errno(ifconfig_handle_t *h);
 
 /** If error type was IOCTL, this identifies which request failed. */
 unsigned long ifconfig_err_ioctlreq(ifconfig_handle_t *h);
-
 int ifconfig_get_description(ifconfig_handle_t *h, const char *name,
     char **description);
 int ifconfig_set_description(ifconfig_handle_t *h, const char *name,
     const char *newdescription);
 int ifconfig_unset_description(ifconfig_handle_t *h, const char *name);
-int ifconfig_set_name(ifconfig_handle_t *h, const char *name, const char *newname);
+int ifconfig_set_name(ifconfig_handle_t *h, const char *name,
+    const char *newname);
 int ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu);
 int ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu);
-
-int ifconfig_set_metric(ifconfig_handle_t *h, const char *name, const int metric);
+int ifconfig_set_metric(ifconfig_handle_t *h, const char *name,
+    const int metric);
 int ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric);
-
 int ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
     const int capability);
 int ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
diff --git a/lib/libifconfig/libifconfig_internal.c b/lib/libifconfig/libifconfig_internal.c
index 304c2800e22a..cc0441053d18 100644
--- a/lib/libifconfig/libifconfig_internal.c
+++ b/lib/libifconfig/libifconfig_internal.c
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -30,31 +26,32 @@
  * $FreeBSD$
  */
 
+#include <sys/ioctl.h>
 
 #include <net/if.h>
 
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/ioctl.h>
 #include <unistd.h>
 
-
 #include "libifconfig.h" // Needed for ifconfig_errstate
 #include "libifconfig_internal.h"
 
+
 int
 ifconfig_ioctlwrap_ret(ifconfig_handle_t *h, unsigned long request, int rcode)
 {
+
 	if (rcode != 0) {
 		h->error.errtype = IOCTL;
 		h->error.ioctl_request = request;
 		h->error.errcode = errno;
 	}
+
 	return (rcode);
 }
 
-
 int
 ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily,
     unsigned long request, struct ifreq *ifr)
@@ -69,13 +66,14 @@ ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily,
 	return (ifconfig_ioctlwrap_ret(h, request, rcode));
 }
 
-
 /*
  * Function to get socket for the specified address family.
  * If the socket doesn't already exist, attempt to create it.
  */
-int ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s)
+int
+ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s)
 {
+
 	if (addressfamily > AF_MAX) {
 		h->error.errtype = SOCKET;
 		h->error.errcode = EINVAL;
diff --git a/lib/libifconfig/libifconfig_internal.h b/lib/libifconfig/libifconfig_internal.h
index 2320ca7b3767..73694c90e139 100644
--- a/lib/libifconfig/libifconfig_internal.h
+++ b/lib/libifconfig/libifconfig_internal.h
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -80,7 +76,8 @@ struct ifconfig_handle {
 int ifconfig_socket(ifconfig_handle_t *h, const int addressfamily, int *s);
 
 /** Function used by other wrapper functions to populate _errstate when appropriate.*/
-int ifconfig_ioctlwrap_ret(ifconfig_handle_t *h, unsigned long request, int rcode);
+int ifconfig_ioctlwrap_ret(ifconfig_handle_t *h, unsigned long request,
+    int rcode);
 
 /** Function to wrap ioctl() and automatically populate ifconfig_errstate when appropriate.*/
 int ifconfig_ioctlwrap(ifconfig_handle_t *h, const int addressfamily,
diff --git a/share/examples/libifconfig/ifcreate.c b/share/examples/libifconfig/ifcreate.c
index 8f5dde506d2e..7a7fad64d1ed 100644
--- a/share/examples/libifconfig/ifcreate.c
+++ b/share/examples/libifconfig/ifcreate.c
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -40,16 +36,17 @@
 #include <libifconfig.h>
 
 
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
 {
+	char *ifname, *ifactualname;
+
 	if (argc != 2) {
 		errx(EINVAL, "Invalid number of arguments."
 		    " Only one argument is accepted, and it should be the name"
 		    " of the interface to be created.");
 	}
 
-	char *ifname, *ifactualname;
-
 	/* We have a static number of arguments. Therefore we can do it simple. */
 	ifname = strdup(argv[1]);
 
@@ -63,31 +60,31 @@ int main(int argc, char *argv[])
 		free(ifname);
 		free(ifactualname);
 		return (0);
-	} else {
-		switch (ifconfig_err_errtype(lifh)) {
-		case SOCKET:
-			warnx("couldn't create socket. This shouldn't happen.\n");
-			break;
-		case IOCTL:
-			if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
-				warnx(
-					"Failed to create interface (SIOCIFCREATE2)\n");
-			}
-			break;
-		default:
+	}
+
+	switch (ifconfig_err_errtype(lifh)) {
+	case SOCKET:
+		warnx("couldn't create socket. This shouldn't happen.\n");
+		break;
+	case IOCTL:
+		if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
 			warnx(
-				"This is a thorough example accommodating for temporary"
-				" 'not implemented yet' errors. That's likely what happened"
-				" now. If not, your guess is as good as mine. ;)"
-				" Error code: %d\n", ifconfig_err_errno(
-					lifh));
-			break;
+				"Failed to create interface (SIOCIFCREATE2)\n");
 		}
-
-		ifconfig_close(lifh);
-		lifh = NULL;
-		free(ifname);
-		free(ifactualname);
-		return (-1);
+		break;
+	default:
+		warnx(
+			"This is a thorough example accommodating for temporary"
+			" 'not implemented yet' errors. That's likely what happened"
+			" now. If not, your guess is as good as mine. ;)"
+			" Error code: %d\n", ifconfig_err_errno(
+				lifh));
+		break;
 	}
+
+	ifconfig_close(lifh);
+	lifh = NULL;
+	free(ifname);
+	free(ifactualname);
+	return (-1);
 }
diff --git a/share/examples/libifconfig/ifdestroy.c b/share/examples/libifconfig/ifdestroy.c
index 029e70a8d9b0..4dd556f9d8c8 100644
--- a/share/examples/libifconfig/ifdestroy.c
+++ b/share/examples/libifconfig/ifdestroy.c
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -40,16 +36,17 @@
 #include <libifconfig.h>
 
 
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
 {
+	char *ifname;
+
 	if (argc != 2) {
 		errx(EINVAL, "Invalid number of arguments."
 		    " Only one argument is accepted, and it should be the name"
 		    " of the interface to be destroyed.");
 	}
 
-	char *ifname;
-
 	/* We have a static number of arguments. Therefore we can do it simple. */
 	ifname = strdup(argv[1]);
 
@@ -62,26 +59,26 @@ int main(int argc, char *argv[])
 		lifh = NULL;
 		free(ifname);
 		return (0);
-	} else {
-		switch (ifconfig_err_errtype(lifh)) {
-		case SOCKET:
-			warnx("couldn't create socket. This shouldn't happen.\n");
-			break;
-		case IOCTL:
-			if (ifconfig_err_ioctlreq(lifh) == SIOCIFDESTROY) {
-				warnx(
-					"Failed to destroy interface (SIOCIFDESTROY)\n");
-			}
-			break;
-		default:
+	}
+
+	switch (ifconfig_err_errtype(lifh)) {
+	case SOCKET:
+		warnx("couldn't create socket. This shouldn't happen.\n");
+		break;
+	case IOCTL:
+		if (ifconfig_err_ioctlreq(lifh) == SIOCIFDESTROY) {
 			warnx(
-				"Should basically never end up here in this example.\n");
-			break;
+				"Failed to destroy interface (SIOCIFDESTROY)\n");
 		}
-
-		ifconfig_close(lifh);
-		lifh = NULL;
-		free(ifname);
-		return (-1);
+		break;
+	default:
+		warnx(
+			"Should basically never end up here in this example.\n");
+		break;
 	}
+
+	ifconfig_close(lifh);
+	lifh = NULL;
+	free(ifname);
+	return (-1);
 }
diff --git a/share/examples/libifconfig/setdescription.c b/share/examples/libifconfig/setdescription.c
index 656aba75976f..371b49729379 100644
--- a/share/examples/libifconfig/setdescription.c
+++ b/share/examples/libifconfig/setdescription.c
@@ -12,10 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS 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
@@ -38,15 +34,17 @@
 #include <libifconfig.h>
 
 
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
 {
+	char *ifname, *ifdescr, *curdescr;
+
 	if (argc != 3) {
 		errx(EINVAL, "Invalid number of arguments."
 		    " First argument should be interface name, second argument"
 		    " should be the description to set.");
 	}
 
-	char *ifname, *ifdescr, *curdescr;
 	/* We have a static number of arguments. Therefore we can do it simple. */
 	ifname = strdup(argv[1]);
 	ifdescr = strdup(argv[2]);
diff --git a/share/examples/libifconfig/setmtu.c b/share/examples/libifconfig/setmtu.c
index 4d5a0f8d5f92..1f8f33873ecf 100644
--- a/share/examples/libifconfig/setmtu.c
+++ b/share/examples/libifconfig/setmtu.c
@@ -12,9 +12,6 @@
  * 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 copyright holder 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
@@ -40,17 +37,18 @@
 #include <libifconfig.h>
 
 
-int main(int argc, char *argv[])
+int
+main(int argc, char *argv[])
 {
+	char *ifname, *ptr;
+	int mtu;
+
 	if (argc != 3) {
 		errx(EINVAL, "Invalid number of arguments."
 		    " First argument should be interface name, second argument"
 		    " should be the MTU to set.");
 	}
 
-	char *ifname, *ptr;
-	int mtu;
-
 	/* We have a static number of arguments. Therefore we can do it simple. */
 	ifname = strdup(argv[1]);
 	mtu = (int)strtol(argv[2], &ptr, 10);
@@ -65,30 +63,30 @@ int main(int argc, char *argv[])
 		lifh = NULL;
 		free(ifname);
 		return (0);
-	} else {
-		switch (ifconfig_err_errtype(lifh)) {
-		case SOCKET:
-			warnx("couldn't create socket. This shouldn't happen.\n");
-			break;
-		case IOCTL:
-			if (ifconfig_err_ioctlreq(lifh) == SIOCSIFMTU) {
-				warnx("Failed to set MTU (SIOCSIFMTU)\n");
-			} else {
-				warnx(
-					"Failed to set MTU due to error in unexpected ioctl() call %lu. Error code: %i.\n",
-					ifconfig_err_ioctlreq(lifh),
-					ifconfig_err_errno(lifh));
-			}
-			break;
-		default:
+	}
+
+	switch (ifconfig_err_errtype(lifh)) {
+	case SOCKET:
+		warnx("couldn't create socket. This shouldn't happen.\n");
+		break;
+	case IOCTL:
+		if (ifconfig_err_ioctlreq(lifh) == SIOCSIFMTU) {
+			warnx("Failed to set MTU (SIOCSIFMTU)\n");
+		} else {
 			warnx(
-				"Should basically never end up here in this example.\n");
-			break;
+				"Failed to set MTU due to error in unexpected ioctl() call %lu. Error code: %i.\n",
+				ifconfig_err_ioctlreq(lifh),
+				ifconfig_err_errno(lifh));
 		}
-
-		ifconfig_close(lifh);
-		lifh = NULL;
-		free(ifname);
-		return (-1);
+		break;
+	default:
+		warnx(
+			"Should basically never end up here in this example.\n");
+		break;
 	}
+
+	ifconfig_close(lifh);
+	lifh = NULL;
+	free(ifname);
+	return (-1);
 }