source: vendor/current/tests/ftruncate.c

/* test whether ftruncte() can extend a file */

#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define DATA "conftest.trunc"
#define LEN 7663

main()
{
        int *buf;
        int fd = open(DATA,O_RDWR|O_CREAT|O_TRUNC,0666);

        if (fd == -1) {
                exit(1);
        }

        ftruncate(fd, LEN);

        unlink(DATA);

        if (lseek(fd, 0, SEEK_END) == LEN) {
                exit(0);
        }
        exit(1);
}