1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#include "tra.h"
/* XXX: change to use Fdbuf's ? */
enum
{
BUFSZ = (1<<15)
};
static int
copy(int from, int to, int n)
{
static char buf[BUFSZ];
if(n > BUFSZ)
return -1;
if(readn(from, buf, n) != n)
sysfatal("readn: %r");
if(writen(to, buf, n) != n)
sysfatal("writen: %r");
return 0;
}
static void
usage(void)
{
fprint(2, "usage: stdsplit\n");
}
int
main(int argc, char *argv[])
{
int n, w, err=0;
char *p, buf[6];
if(argc != 1){
usage();
return 1;
}
memset(buf, 0, sizeof(buf));
for(;;){
if(err){
err = 0;
memmove(buf, buf+1, 4);
if(readn(0, buf+4, 1) != 1)
break;
}else if(readn(0, buf, 5) != 5)
break;
switch(buf[0]){
case 'o':
w = 1;
break;
case 'e':
w = 2;
break;
default:
err = 1;
continue;
}
n = strtol(buf+1, &p, 16);
if(*p != '\0' || copy(0, w, n) < 0)
err = 1;
}
return 0;
}
|
