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Add systemd-homed UID range

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Signed-off-by: AnErrupTion <anerruption@disroot.org>
This commit is contained in:
AnErrupTion
2025-11-30 23:02:23 +01:00
parent 4df2382698
commit e29bda3250
1 changed files with 21 additions and 2 deletions
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23
src/interop.zig
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@@ -81,6 +81,9 @@ fn PlatformStruct() type {
pub const vt_activate = vt.VT_ACTIVATE;
pub const vt_waitactive = vt.VT_WAITACTIVE;
const SYSTEMD_HOMED_UID_MIN = 60001;
const SYSTEMD_HOMED_UID_MAX = 60513;
pub fn setUserContextImpl(username: [*:0]const u8, entry: UsernameEntry) !void {
const status = grp.initgroups(username, @intCast(entry.gid));
if (status != 0) return error.GroupInitializationFailed;
@@ -179,6 +182,19 @@ fn PlatformStruct() type {
}
}
// This code assumes the OS has a login.defs file with UID_MIN
// and UID_MAX values defined in it, which should be the case
// for most systemd-based Linux distributions out there.
// This should be a good enough safeguard for now, as there's
// no reliable (and clean) way to check for systemd support
if (uid_range.uid_min > SYSTEMD_HOMED_UID_MIN) {
uid_range.uid_min = SYSTEMD_HOMED_UID_MIN;
}
if (uid_range.uid_max < SYSTEMD_HOMED_UID_MAX) {
uid_range.uid_max = SYSTEMD_HOMED_UID_MAX;
}
return uid_range;
}
@@ -226,6 +242,9 @@ fn PlatformStruct() type {
pub const vt_activate = consio.VT_ACTIVATE;
pub const vt_waitactive = consio.VT_WAITACTIVE;
const FREEBSD_UID_MIN = 1000;
const FREEBSD_UID_MAX = 32000;
pub fn setUserContextImpl(username: [*:0]const u8, entry: UsernameEntry) !void {
// FreeBSD has initgroups() in unistd
const status = unistd.initgroups(username, @intCast(entry.gid));
@@ -244,8 +263,8 @@ fn PlatformStruct() type {
return .{
// Hardcoded default values chosen from
// /usr/src/usr.sbin/pw/pw_conf.c
.uid_min = 1000,
.uid_max = 32000,
.uid_min = FREEBSD_UID_MIN,
.uid_max = FREEBSD_UID_MAX,
};
}
},