1 #include <lib9.h>
2
3 void
cat(int f,char * s)4 cat(int f, char *s)
5 {
6 char buf[8192];
7 long n;
8
9 while((n=read(f, buf, (long)sizeof buf))>0)
10 if(write(1, buf, n)!=n)
11 sysfatal("write error copying %s: %r", s);
12 if(n < 0)
13 sysfatal("error reading %s: %r", s);
14 }
15
16 void
main(int argc,char * argv[])17 main(int argc, char *argv[])
18 {
19 int f, i;
20
21 argv0 = "cat";
22 if(argc == 1)
23 cat(0, "<stdin>");
24 else for(i=1; i<argc; i++){
25 f = open(argv[i], OREAD);
26 if(f < 0)
27 sysfatal("can't open %s: %r", argv[i]);
28 else{
29 cat(f, argv[i]);
30 close(f);
31 }
32 }
33 exits(0);
34 }
35
36