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Kernel+SystemServer: Mount filesystems and start TTYServer in userspace

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This commit is contained in:
Sergey Bugaev 2019-08-17 12:33:39 +03:00 • committed by Andreas Kling
parent f95c264f17
commit 6778abb999
3 changed files with 36 additions and 44 deletions
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39
Servers/SystemServer/main.cpp
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@ -1,13 +1,14 @@
#include <AK/Assertions.h>
#include <LibCore/CFile.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
void start_process(const char* prog, int prio)
void start_process(const char* prog, const char* arg, int prio, const char* tty = nullptr)
{
pid_t pid = 0;
@ -32,9 +33,17 @@ void start_process(const char* prog, int prio)
int ret = sched_setparam(pid, &p);
ASSERT(ret == 0);
if (tty != nullptr) {
close(0);
ASSERT(open(tty, O_RDWR) == 0);
dup2(0, 1);
dup2(0, 2);
}
char* progv[256];
progv[0] = const_cast<char*>(prog);
progv[1] = nullptr;
progv[1] = const_cast<char*>(arg);
progv[2] = nullptr;
ret = execv(prog, progv);
if (ret < 0) {
dbgprintf("Exec %s failed! %s", prog, strerror(errno));
@ -72,12 +81,26 @@ int main(int, char**)
{
int lowest_prio = sched_get_priority_min(SCHED_OTHER);
int highest_prio = sched_get_priority_max(SCHED_OTHER);
start_process("/bin/LookupServer", lowest_prio);
start_process("/bin/WindowServer", highest_prio);
start_process("/bin/AudioServer", highest_prio);
start_process("/bin/Taskbar", highest_prio);
start_process("/bin/Terminal", highest_prio - 1);
start_process("/bin/Launcher", highest_prio);
// Mount the filesystems.
start_process("/bin/mount", "-a", highest_prio);
wait(nullptr);
start_process("/bin/TTYServer", "tty0", highest_prio, "/dev/tty0");
start_process("/bin/TTYServer", "tty1", highest_prio, "/dev/tty1");
start_process("/bin/TTYServer", "tty2", highest_prio, "/dev/tty2");
start_process("/bin/TTYServer", "tty3", highest_prio, "/dev/tty3");
// Drop privileges.
setuid(100);
setgid(100);
start_process("/bin/LookupServer", nullptr, lowest_prio);
start_process("/bin/WindowServer", nullptr, highest_prio);
start_process("/bin/AudioServer", nullptr, highest_prio);
start_process("/bin/Taskbar", nullptr, highest_prio);
start_process("/bin/Terminal", nullptr, highest_prio - 1);
start_process("/bin/Launcher", nullptr, highest_prio);
// This won't return if we're in test mode.
check_for_test_mode();