1 #include <u.h>
2 #include <libc.h>
3
4 void
cat(int f,char * s)5 cat(int f, char *s)
6 {
7 char buf[16*1024];
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
main(int argc,char * argv[])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 }
36
37