the whole code is the IPC solution I came up with which is replaced by one line of code setutxent()
details:
https://lists.freebsd.org/archives/soc-status/2024-July/000080.html
int
main()
{
cap_channel_t *cap_casper, *cap_net;
int s, sock1, sock, client_sock;
struct sockaddr_un addr;
socklen_t len;
cap_casper = cap_init();
cap_net = cap_service_open(chan: cap_casper, name: "system.net");
cap_close(chan: cap_casper);
//if (caph_enter() < 0)
//err(1, "unable to enter capability mode");
s = socket(PF_UNIX, SOCK_STREAM, 0);
if (s < 0) {
err(1, "socket\n");
exit(1);
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, SOCKET_PATH, sizeof(addr.sun_path) - 1);
unlink(SOCKET_PATH);
if (cap_bind(cap_casper,s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
err(1, "bind");
printf("bind:\n");
exit(1);
}
listen(s, 5);
//if (caph_enter() < 0)
//err(1, "unable to enter capability mode");
pid_t pid = fork();
if (pid == -1) {
perror("fork");
exit(1);
} else if (pid == 0) { // Child
printf("child\n");
len = sizeof(addr);
// close(s);
sock = accept(s, (struct sockaddr *)&addr, &len);
if (sock < 0) {
err(1, "accept\n");
exit(1);
}
send_utmpx(sock);
// process_nvlist_data(sock);
close(sock);
} else { // Parent
//if (caph_enter() < 0)
//err(1, "unable to enter capability mode");
printf("parent\n");
client_sock = socket(AF_UNIX, SOCK_STREAM, 0);
sock1 = cap_connect(cap_net, client_sock, (struct sockaddr *)&addr,
sizeof(addr));
if (sock1 < 0) {
// printf("conncettest");
err(1, "connect\n");
exit(1);
}
receive_utmpx(sock: client_sock);
// read_nvlist_data(client_sock);
close(client_sock);
// wait(NULL); // Wait for child to finish
}
return 0;
}
or
or
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