Add unistd.h to the getosreldate(3) manpage.

Update referenced example to include unistd.h per manpage.
Update example to be more style(9)-ish, silence warnings and add
FreeBSD id to the source file.

1 files changed, 9 insertions, 5 deletions

diff --git a/share/examples/FreeBSD_version/FreeBSD_version.c b/share/examples/FreeBSD_version/FreeBSD_version.c
index 1d75897..036a5ae 100644
--- a/share/examples/FreeBSD_version/FreeBSD_version.c
+++ b/share/examples/FreeBSD_version/FreeBSD_version.c
@@ -1,3 +1,4 @@
+/* $FreeBSD$ */
 #if __FreeBSD__ == 0		/* 1.0 did not define __FreeBSD__ */
 #define __FreeBSD_version 199401
 #elif __FreeBSD__ == 1		/* 1.1 defined it to be 1 */
@@ -5,13 +6,16 @@
 #else				/* 2.0 and higher define it to be 2 */
 #include <osreldate.h>		/* and this works */
 #endif
+#include <stdio.h>
+#include <unistd.h>
 
-int main(void) {
-  extern int getosreldate(void);
-  printf("Compilation release date: %d\n", __FreeBSD_version);
+int
+main(void) {
+	printf("Compilation release date: %d\n", __FreeBSD_version);
 #if __FreeBSD_version >= 199408
-  printf("Execution environment release date: %d\n", getosreldate());
+	printf("Execution environment release date: %d\n", getosreldate());
 #else
-  printf("Execution environment release date: can't tell\n");
+	printf("Execution environment release date: can't tell\n");
 #endif
+	return (0);
 }