#include <sys/types .h> #include <sys/stat.h> #include <sys/file.h> #include <unistd .h> #include <stdio .h>
/* change to <sys/fcntl.h> for System V */ /* needed for perror function */
 /*
* appendfile.c: append the contents of the first file to the second file */
int
{
main (int argc, char *argv[])
int n, infile , outfile ; char buffer [1024];
 ( argc != 3) { //Q: what does argc ( argument count ) mean? write(2, "Usage: ./appendfile file1 file2\n", 32); exit(1);
     }
i f
}
/*
* Open the first file ( file1 ) for reading */
if ((infile = open(argv[1], O_RDONLY)) < 0) { perror(argv[1]);
exit(1);
}
/*
* Open the second file ( file2 ) for writing */
if ((outfile = open(argv[2], O_WRONLY | O_APPEND)) < 0) { perror(argv[2]);
exit(1);
}
/*
* CODE HERE: Copy data from the first file to the second file */
/*
* Close the two files before exiting */
close(infile); close(outfile); exit(0);