tests/ftruncate.c

説明を見る。

/* 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);

        ftruncate(fd, LEN);

        unlink(DATA);

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

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