int create_sock() {
int fds[2];
int sock2;
int result = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
if (result == -1) {
perror("socket");
exit(101);
}
if (sock == fds[0]) {
sock2 = fds[1];
}
else if (sock == fds[1]) {
sock2 = fds[0];
}
else {
dup2(fds[0], sock);
close(fds[0]);
sock2 = fds[1];
}
ready = 0;
signal(SIGUSR1, set_ready);
/*
writer: stdin -> socket (when SC exits/fails, receives SIGCHLD and exits)
\--> main: shellcode (when exits/fails, sends SIGCHLD to writer and closes socket)
\--> reader: sock -> stdout (when SC exits/fails, socket is closed and reader exits)
main saves pid1 = reader,
pid2 = writer
to send them SIGUSR1 right before running shellcode
*/
pid1 = fork();
if (pid1 == 0) {
close(sock);
run_reader(sock2);
}
pid2 = fork();
if (pid2 > 0) { // parent - writer
signal(SIGCHLD, exit);
close(sock);
run_writer(sock2);
}
pid2 = getppid();
close(sock2);
return sock;
}
int main(int argc, const char **argv)
{
log_verbose(" =================== 20140410 \n");
pid_t pidreader;
pidreader = fork();
assert(-1 != pidreader);
if (0 == pidreader) {
run_reader();
}
else {
run_writer(pidreader);
}
return 0;
}
int main(int argc, const char **argv)
{
pid_t pidreader;
if (argc == 2) {
_test_size = atoi(argv[1]);
}
pidreader = fork();
assert(-1 != pidreader);
if (0 == pidreader) {
run_reader();
}
else {
run_writer(pidreader);
}
return 0;
}