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SystemServer: Generalize chown_all_framebuffer_devices function

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Instead of neatly searching for all framebuffer device nodes and
changing ownership of them, let's generalize this function so we can
apply the same pattern on tty nodes.
This commit is contained in:
Liav A 2021-08-06 14:28:04 +03:00 committed by Andreas Kling
parent 49d795b985
commit 65730f459d
Notes: sideshowbarker 2024-07-18 07:03:29 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/65730f459df
Pull-request: https://github.com/SerenityOS/serenity/pull/9234
1 changed files with 8 additions and 17 deletions
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25
Userland/Services/SystemServer/main.cpp
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@ -83,9 +83,9 @@ static void chown_wrapper(const char* path, uid_t uid, gid_t gid)
}
}
static void chown_all_framebuffer_devices(group* phys_group)
static void chown_all_matching_device_nodes(group* group, unsigned major_number)
{
VERIFY(phys_group);
VERIFY(group);
struct stat cur_file_stat;
Core::DirIterator di("/dev/", Core::DirIterator::SkipParentAndBaseDir);
@ -96,12 +96,9 @@ static void chown_all_framebuffer_devices(group* phys_group)
auto rc = stat(entry_name.characters(), &cur_file_stat);
if (rc < 0)
continue;
if (!S_ISBLK(cur_file_stat.st_mode))
if (major(cur_file_stat.st_rdev) != major_number)
continue;
// FIXME: Try to find a way to not hardcode the major number of framebuffer device nodes.
if (major(cur_file_stat.st_rdev) != 29)
continue;
chown_wrapper(entry_name.characters(), 0, phys_group->gr_gid);
chown_wrapper(entry_name.characters(), 0, group->gr_gid);
}
}
@ -136,7 +133,8 @@ static void prepare_devfs()
auto phys_group = getgrnam("phys");
VERIFY(phys_group);
chown_all_framebuffer_devices(phys_group);
// FIXME: Try to find a way to not hardcode the major number of framebuffer device nodes.
chown_all_matching_device_nodes(phys_group, 29);
chown_wrapper("/dev/keyboard0", 0, phys_group->gr_gid);
@ -144,15 +142,8 @@ static void prepare_devfs()
auto tty_group = getgrnam("tty");
VERIFY(tty_group);
// FIXME: Count TTYs instead of using a hardcoded amount
for (size_t index = 0; index < 6; index++) {
chown_wrapper(String::formatted("/dev/tty{}", index).characters(), 0, tty_group->gr_gid);
}
// FIXME: Count serial TTYs instead of using a hardcoded amount
for (size_t index = 0; index < 4; index++) {
chown_wrapper(String::formatted("/dev/ttyS{}", index).characters(), 0, tty_group->gr_gid);
}
// FIXME: Try to find a way to not hardcode the major number of tty nodes.
chown_all_matching_device_nodes(tty_group, 4);
auto audio_group = getgrnam("audio");
VERIFY(audio_group);