creat.c

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(void){
    char *fname = "a.txt";
    int f = creat(fname,0755);
    if( f == -1 ){
        fprintf(stderr,"Can't creat '%s'",fname);
        exit(1);
    }
    printf("'%s' created: %d\n", fname, f);
    close(f);
    return 0;
}