This commit is contained in:
Barak Michener 2013-09-01 14:08:11 -04:00
parent 187127a646
commit b1e4f4e790

248
tpm.cc
View file

@ -61,149 +61,149 @@ int ClientMain(string done_message) {
} }
int DaemonMain(int countdown_time) { int DaemonMain(int countdown_time) {
/* Our process ID and Session ID */ /* Our process ID and Session ID */
int ok; int ok;
pid_t pid, sid; pid_t pid, sid;
struct timespec ts; struct timespec ts;
ts.tv_sec = 0; ts.tv_sec = 0;
ts.tv_nsec = 1000 /*micro*/ * 1000 /* milli */ * 50; ts.tv_nsec = 1000 /*micro*/ * 1000 /* milli */ * 50;
string socket_name = SocketName(); string socket_name = SocketName();
int sock_fd; int sock_fd;
struct sockaddr_un local, remote; struct sockaddr_un local, remote;
if ((sock_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) { if ((sock_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
perror("socket"); perror("socket");
exit(1); exit(1);
} }
local.sun_family = AF_UNIX; local.sun_family = AF_UNIX;
strcpy(local.sun_path, socket_name.c_str()); strcpy(local.sun_path, socket_name.c_str());
unlink(local.sun_path); unlink(local.sun_path);
int len = strlen(local.sun_path) + sizeof(local.sun_family) + 1; int len = strlen(local.sun_path) + sizeof(local.sun_family) + 1;
if (bind(sock_fd, (struct sockaddr *)&local, len) == -1) { if (bind(sock_fd, (struct sockaddr *)&local, len) == -1) {
perror("bind"); perror("bind");
exit(1); exit(1);
} }
int flags = fcntl(sock_fd,F_GETFL,0); int flags = fcntl(sock_fd,F_GETFL,0);
fcntl(sock_fd, F_SETFL, flags | O_NONBLOCK); fcntl(sock_fd, F_SETFL, flags | O_NONBLOCK);
/* Fork off the parent process */ /* Fork off the parent process */
pid = fork(); pid = fork();
if (pid < 0) { if (pid < 0) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
/* If we got a good PID, then /* If we got a good PID, then
we can exit the parent process. */ we can exit the parent process. */
if (pid > 0) { if (pid > 0) {
exit(EXIT_SUCCESS); exit(EXIT_SUCCESS);
} }
/* Change the file mode mask */ /* Change the file mode mask */
umask(0); umask(0);
/* Open any logs here */ /* Open any logs here */
/* Create a new SID for the child process */ /* Create a new SID for the child process */
sid = setsid(); sid = setsid();
if (sid < 0) { if (sid < 0) {
/* Log the failure */ /* Log the failure */
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
/* Change the current working directory */ /* Change the current working directory */
if ((chdir("/")) < 0) { if ((chdir("/")) < 0) {
/* Log the failure */ /* Log the failure */
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
/* Close out the standard file descriptors */ /* Close out the standard file descriptors */
close(STDIN_FILENO); close(STDIN_FILENO);
close(STDOUT_FILENO); close(STDOUT_FILENO);
close(STDERR_FILENO); close(STDERR_FILENO);
if (listen(sock_fd, 5) == -1) { if (listen(sock_fd, 5) == -1) {
exit(1); exit(1);
} }
struct timeval start_time; struct timeval start_time;
ok = gettimeofday(&start_time, NULL); ok = gettimeofday(&start_time, NULL);
int remote_fd = -1; int remote_fd = -1;
bool wakeup = false; bool wakeup = false;
while (!wakeup) { while (!wakeup) {
struct timeval current_time; struct timeval current_time;
struct timeval diff_time; struct timeval diff_time;
ok = gettimeofday(&current_time, NULL); ok = gettimeofday(&current_time, NULL);
timersub(&current_time, &start_time, &diff_time); timersub(&current_time, &start_time, &diff_time);
if (diff_time.tv_sec >= countdown_time) { if (diff_time.tv_sec >= countdown_time) {
wakeup = true; wakeup = true;
continue; continue;
} }
long remaining_time = (long)countdown_time - diff_time.tv_sec; long remaining_time = (long)countdown_time - diff_time.tv_sec;
socklen_t t = sizeof(remote); socklen_t t = sizeof(remote);
while ((remote_fd = accept(sock_fd, (struct sockaddr *)&remote, &t)) != -1) { while ((remote_fd = accept(sock_fd, (struct sockaddr *)&remote, &t)) != -1) {
char message[100]; char message[100];
int message_len = snprintf(message, 100, "%ld:%02ld", remaining_time / 60, remaining_time % 60); int message_len = snprintf(message, 100, "%ld:%02ld", remaining_time / 60, remaining_time % 60);
if (send(remote_fd, message, message_len, 0) < 0) { if (send(remote_fd, message, message_len, 0) < 0) {
exit(1); exit(1);
} }
close(remote_fd); close(remote_fd);
} }
// Make sure it was just EWOULDBLOCK // Make sure it was just EWOULDBLOCK
if (errno != EAGAIN && errno != EWOULDBLOCK) { if (errno != EAGAIN && errno != EWOULDBLOCK) {
exit(1); exit(1);
} }
ok = nanosleep(&ts, NULL); ok = nanosleep(&ts, NULL);
} }
close(sock_fd); close(sock_fd);
printf("%s\n", local.sun_path); printf("%s\n", local.sun_path);
unlink(local.sun_path); unlink(local.sun_path);
string post_hook = MakePostHookPath(); string post_hook = MakePostHookPath();
char* argv[] = {(char *)post_hook.c_str(), NULL}; char* argv[] = {(char *)post_hook.c_str(), NULL};
if (access(post_hook.c_str(), X_OK) != -1) { if (access(post_hook.c_str(), X_OK) != -1) {
execv(post_hook.c_str(), argv); execv(post_hook.c_str(), argv);
} }
exit(EXIT_SUCCESS); exit(EXIT_SUCCESS);
} }
int main(int argc, char** argv) { int main(int argc, char** argv) {
int c; int c;
int countdown_time = kDefaultLengthSecs; int countdown_time = kDefaultLengthSecs;
string done_message = kDefaultDoneMessage; string done_message = kDefaultDoneMessage;
int got_positional = 0; int got_positional = 0;
string command = ""; string command = "";
while (1) { while (1) {
while ( (c = getopt(argc, argv, "bs:m:d:")) != -1) { while ( (c = getopt(argc, argv, "bs:m:d:")) != -1) {
switch (c) { switch (c) {
case 's': case 's':
countdown_time = atoi(optarg); countdown_time = atoi(optarg);
break; break;
case 'm': case 'm':
countdown_time = atoi(optarg) * 60; countdown_time = atoi(optarg) * 60;
break; break;
case 'd': case 'd':
done_message = optarg; done_message = optarg;
break; break;
}
} }
if (optind < argc && !got_positional) {
command = argv[optind];
got_positional = 1;
} else {
break;
}
optind++;
} }
if (optind < argc && !got_positional) {
command = argv[optind];
got_positional = 1;
} else {
break;
}
optind++;
}
if (command == "start") { if (command == "start") {
DaemonMain(countdown_time); DaemonMain(countdown_time);
} }
else { else {
return ClientMain(done_message); return ClientMain(done_message);
} }
exit(0); exit(0);
} }