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#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/select.h>
#define MAXBUF 2048
fd_set rfds0, rfds1;
struct timeval timeout;
int
main()
{
char buf[MAXBUF];
FILE *in, *out;
int c, i, n, ofd, state;
if(!(in = fopen("/var/tmp/r.in", "w")))
err(1, "fopen");
if(!(out = fopen("/var/tmp/r.out", "r")))
err(1, "fopen");
ofd = fileno(out);
FD_ZERO(&rfds0);
FD_SET(0, &rfds0);
FD_ZERO(&rfds1);
FD_SET(ofd, &rfds1);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
for(state = 0; printf("."); state = !state)
switch(state){
case 0:
if(!select(0+1, &rfds0, NULL, NULL, &timeout))
break;
printf("0 ready\n");
break;
case 1:
if(!select(ofd+1, &rfds1, NULL, NULL, &timeout))
break;
printf("1 ready\n");
break;
}
#if 0
for(;;){
printf(".");
FD_ZERO(&read_set);
FD_SET(0, &read_set);
FD_SET(ofd, &read_set);
switch(select(ofd+1, &read_set, NULL, NULL, &timeout)){
case -1:
err(1, "select");
break;
case 0:
break;
default:
if(FD_ISSET(0, &read_set)){
fgets(buf, MAXBUF, stdin);
buf[strcspn(buf, "\n")] = 0;
printf("in: %s\n", buf);
}else if(FD_ISSET(ofd, &read_set)){
fgets(buf, MAXBUF, stdin);
buf[strcspn(buf, "\n")] = 0;
printf("out: %s\n", buf);
}else{
printf("?\n");
}
}
}
#endif
}
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