Further to an earlier message I sent, I now attach an example. This tries to send a message of a fixed sized down a pipe. Under windows I can't seem to send much more than 25k down in one go, although I can send more if I chop it up into sections. Under linux however I can send as large amounts as I like. While it is possible to work around it, I thought I would mention it in case it was easy to fix, just no-one had requested it :)
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Example program follows: setting MSGSIZE>25000ish on my computer causes fail (ie pipeval=-1)
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#include <unistd.h>
#include <stdio.h>
#define MSGSIZE 23000
char *msg1 = "message";
void main(void) {
char inbuf[MSGSIZE];
int p[2], j;
int pid;
if(pipe(p) == -1) exit(1); switch(pid = fork()){
case -1: exit(2);
case 0: /* if child then write down pipe */
close(p[0]); /* first close the read end of the pipe */
write(p[1], msg1, MSGSIZE);
break;
default: /* parent reads pipe */
close(p[1]); /* first close the write end of the pipe */
int pipeval=read(p[0], inbuf, MSGSIZE);
printf("pipeval:%d\n",pipeval);
printf("Parent sent: %s\n", inbuf);
wait(NULL);
}
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