xv6-65oo2/usertests.c
2006-06-27 14:35:53 +00:00

31 lines
364 B
C

// simple fork and pipe read/write
char buf[32];
void
pipe1()
{
int fds[2], pid;
pipe(fds);
pid = pipe();
if(pid == 0){
write(fds[1], "xyz", 4);
} else {
read(fds[0], buf, sizeof(buf));
if(buf[0] != 'x' || buf[1] != 'y'){
puts("pipe1 oops\n");
return;
}
}
puts("pipe1 ok\n");
}
main()
{
pipe1();
while(1)
;
}