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Merge branch 'master' of gitlab.ibr.cs.tu-bs.de:vss/teaching/ws25/v_bsb2/Gruppe_003

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Eggert Jung
2026-03-01 00:13:35 +01:00
parent 098fe6b283 db0f1a8858
commit 3302149422
1 changed files with 17 additions and 17 deletions
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34
user/app1/appl.cc
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@@ -6,25 +6,25 @@ char sbuf[8194], rbuf[8194]; // (2 * 4KiB) + 2
void main() {
fork();
fork();
int other = fork();
int ppid = sys_getpid();
write(1, "app", 3, 0, ppid);
//if (ppid == other) { // child
// sbuf[0] = 3;
// sbuf[8192] = sys_getpid();
// sbuf[8193] = 1;
// send(other, sbuf, 8193, rbuf, 8193);
int other = fork();
//write(1, "app", 3, 0, ppid);
if (ppid == other) { // child
sbuf[0] = 3;
sbuf[8192] = sys_getpid();
sbuf[8193] = 1;
send(other, sbuf, 8193, rbuf, 8193);
// char msg[] = "REPLY: AA\n";
// msg[7] += rbuf[0] + sbuf[8193];
// msg[8] += 4 + ppid;
// write(0, msg, 10);
//} else { // parent
// receive(rbuf, 8193);
// rbuf[0] = rbuf[0] + rbuf[8192];
// rbuf[8193] = 7;
// reply(rbuf, 8193);
//}
char msg[] = "REPLY: AA\n";
msg[7] += rbuf[0] + sbuf[8193];
msg[8] += 4 + ppid;
write(0, msg, 10,0, ppid);
} else { // parent
receive(rbuf, 8193);
rbuf[0] = rbuf[0] + rbuf[8192];
rbuf[8193] = 7;
reply(rbuf, 8193);
}
sys_exit();
}