HardenedBSD/share/examples/FreeBSD_version/FreeBSD_version.c
Konstantin Belousov e45b2259ec 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.
2008-09-30 11:25:55 +00:00

22 lines
603 B
C

/* $FreeBSD$ */
#if __FreeBSD__ == 0 /* 1.0 did not define __FreeBSD__ */
#define __FreeBSD_version 199401
#elif __FreeBSD__ == 1 /* 1.1 defined it to be 1 */
#define __FreeBSD_version 199405
#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) {
printf("Compilation release date: %d\n", __FreeBSD_version);
#if __FreeBSD_version >= 199408
printf("Execution environment release date: %d\n", getosreldate());
#else
printf("Execution environment release date: can't tell\n");
#endif
return (0);
}