move.c

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <dirent.h>

int main(int argc, char *argv[]) {
    int i, fd1, fd2;
    char *file1, *file2, buf[2];

    file1 = argv[1];
    file2 = argv[2];
    printf("file1=%s file2=%s", file1, file2);

    fd1 = open(file1, O_RDONLY, 0777);
    fd2 = creat(file2, 0777);

    while (i = read(fd1, buf, 1) > 0) {
        write(fd2, buf, 1);
        remove(file1);
        close(fd1);
        close(fd2);
    }
}