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Terminal: Use utmpupdate to update /var/run/utmp

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We now put entries for interactive terminal sessions in the utmp file.
They are removed when you exit the terminal.
This commit is contained in:
Andreas Kling 2020-09-06 16:14:46 +02:00
parent 171bfcff36
commit 3c49a82ae9
1 changed files with 36 additions and 5 deletions
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41
Applications/Terminal/main.cpp
View file

@ -56,13 +56,29 @@
#include <sys/select.h>
#include <unistd.h>
static void run_command(int ptm_fd, String command)
static void utmp_update(const char* tty, pid_t pid, bool create)
{
if (!tty)
return;
int utmpupdate_pid = fork();
if (utmpupdate_pid < 0) {
perror("fork");
return;
}
if (utmpupdate_pid)
return;
char shell_pid_string[64];
snprintf(shell_pid_string, sizeof(shell_pid_string), "%d", pid);
execl("/bin/utmpupdate", "/bin/utmpupdate", "-f", "Terminal", "-p", shell_pid_string, (create ? "-c" : "-d"), tty, nullptr);
}
static pid_t run_command(int ptm_fd, String command)
{
pid_t pid = fork();
if (pid < 0) {
perror("fork");
dbg() << "run_command: could not fork to run '" << command << "'";
return;
return pid;
}
if (pid == 0) {
@ -132,6 +148,8 @@ static void run_command(int ptm_fd, String command)
}
ASSERT_NOT_REACHED();
}
return pid;
}
static RefPtr<GUI::Window> create_settings_window(TerminalWidget& terminal)
@ -239,10 +257,15 @@ int main(int argc, char** argv)
RefPtr<Core::ConfigFile> config = Core::ConfigFile::get_for_app("Terminal");
pid_t shell_pid = 0;
if (command_to_execute)
run_command(ptm_fd, command_to_execute);
shell_pid = run_command(ptm_fd, command_to_execute);
else
run_command(ptm_fd, config->read_entry("Startup", "Command", ""));
shell_pid = run_command(ptm_fd, config->read_entry("Startup", "Command", ""));
auto* pts_name = ptsname(ptm_fd);
utmp_update(pts_name, shell_pid, true);
auto window = GUI::Window::construct();
window->set_title("Terminal");
@ -340,6 +363,11 @@ int main(int argc, char** argv)
return 1;
}
if (unveil("/bin/utmpupdate", "x") < 0) {
perror("unveil");
return 1;
}
if (unveil("/tmp/portal/launch", "rw") < 0) {
perror("unveil");
return 1;
@ -353,5 +381,8 @@ int main(int argc, char** argv)
unveil(nullptr, nullptr);
config->sync();
return app->exec();
int result = app->exec();
dbg() << "Exiting terminal, updating utmp";
utmp_update(pts_name, 0, false);
return result;
}