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#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
copy(const char *src, const char *dst)
{
int source = open(src, O_RDONLY);
if(source == -1) {
fprintf(stderr, "cp: %s: %s\n", src, strerror(errno));
return 1;
}
int destination = creat(dst, 0644);
if(destination == -1) {
fprintf(stderr, "cp: %s: %s\n", dst, strerror(errno));
return 1;
}
int lines;
char buf[8912];
while((lines = read(source, buf, sizeof(buf))) > 0) {
if(lines == -1) {
fprintf(stderr, "cp: %s: %s\n", src, strerror(errno));
return 1;
}
if(write(destination, buf, lines) == -1) {
fprintf(stderr, "cp: %s: %s\n", dst, strerror(errno));
return 1;
}
}
close(destination);
close(source);
return 0;
}
int
main(int argc, char *argv[])
{
if(argc != 3) {
fprintf(stderr, "usage: cp source destination\n");
return 1;
}
return copy(argv[1], argv[2]);
}
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