1 bc7cb1a1 2003-11-23 devnull #include <u.h>
 2 bc7cb1a1 2003-11-23 devnull #include <libc.h>
 3 bc7cb1a1 2003-11-23 devnull 
 4 bc7cb1a1 2003-11-23 devnull void
 5 bc7cb1a1 2003-11-23 devnull cat(int f, char *s)
 6 bc7cb1a1 2003-11-23 devnull {
 7 bc7cb1a1 2003-11-23 devnull 	char buf[8192];
 8 bc7cb1a1 2003-11-23 devnull 	long n;
 9 bc7cb1a1 2003-11-23 devnull 
10 bc7cb1a1 2003-11-23 devnull 	while((n=read(f, buf, (long)sizeof buf))>0)
11 bc7cb1a1 2003-11-23 devnull 		if(write(1, buf, n)!=n)
12 bc7cb1a1 2003-11-23 devnull 			sysfatal("write error copying %s: %r", s);
13 bc7cb1a1 2003-11-23 devnull 	if(n < 0)
14 bc7cb1a1 2003-11-23 devnull 		sysfatal("error reading %s: %r", s);
15 bc7cb1a1 2003-11-23 devnull }
16 bc7cb1a1 2003-11-23 devnull 
17 bc7cb1a1 2003-11-23 devnull void
18 bc7cb1a1 2003-11-23 devnull main(int argc, char *argv[])
19 bc7cb1a1 2003-11-23 devnull {
20 bc7cb1a1 2003-11-23 devnull 	int f, i;
21 bc7cb1a1 2003-11-23 devnull 
22 bc7cb1a1 2003-11-23 devnull 	argv0 = "cat";
23 bc7cb1a1 2003-11-23 devnull 	if(argc == 1)
24 bc7cb1a1 2003-11-23 devnull 		cat(0, "<stdin>");
25 bc7cb1a1 2003-11-23 devnull 	else for(i=1; i<argc; i++){
26 bc7cb1a1 2003-11-23 devnull 		f = open(argv[i], OREAD);
27 bc7cb1a1 2003-11-23 devnull 		if(f < 0)
28 bc7cb1a1 2003-11-23 devnull 			sysfatal("can't open %s: %r", argv[i]);
29 bc7cb1a1 2003-11-23 devnull 		else{
30 bc7cb1a1 2003-11-23 devnull 			cat(f, argv[i]);
31 bc7cb1a1 2003-11-23 devnull 			close(f);
32 bc7cb1a1 2003-11-23 devnull 		}
33 bc7cb1a1 2003-11-23 devnull 	}
34 bc7cb1a1 2003-11-23 devnull 	exits(0);
35 bc7cb1a1 2003-11-23 devnull }