1 #include <u.h>
2 #include <libc.h>
3 
4 void
5 cat(int f, char *s)
6 {
7 	char buf[8192];
8 	long n;
9 
10 	while((n=read(f, buf, (long)sizeof buf))>0)
11 		if(write(1, buf, n)!=n)
12 			sysfatal("write error copying %s: %r", s);
13 	if(n < 0)
14 		sysfatal("error reading %s: %r", s);
15 }
16 
17 void
18 main(int argc, char *argv[])
19 {
20 	int f, i;
21 
22 	argv0 = "cat";
23 	if(argc == 1)
24 		cat(0, "<stdin>");
25 	else for(i=1; i<argc; i++){
26 		f = open(argv[i], OREAD);
27 		if(f < 0)
28 			sysfatal("can't open %s: %r", argv[i]);
29 		else{
30 			cat(f, argv[i]);
31 			close(f);
32 		}
33 	}
34 	exits(0);
35 }