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Print deprecation notice when running SUID

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SUID privilege drop is needed for the "builtin"-backend of libseat,
which copied our old "direct" backend behavior for the sake of
compatibility and ease of transition.

libseat now has a better alternative in the form of seatd-launch. It
uses the normal seatd daemon and libseat backend and takes care of SUID
for us.

Add a soft deprecation warning to highlight our future intent of
removing this code. The deprecation cycle is needed to avoid surprises
when sway no longer drops privileges.

(cherry picked from commit e1db1f8218)
This commit is contained in:
Kenny Levinsen 2022-01-11 11:08:44 +01:00 committed by Simon Ser
parent 02a69dde9f
commit 67d3d952b6
1 changed files with 3 additions and 0 deletions
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sway/main.c
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@ -153,6 +153,9 @@ static void log_kernel(void) {
static bool drop_permissions(void) {
if (getuid() != geteuid() || getgid() != getegid()) {
sway_log(SWAY_ERROR, "!!! DEPRECATION WARNING: "
"SUID privilege drop will be removed in a future release, please migrate to seatd-launch");
// Set the gid and uid in the correct order.
if (setgid(getgid()) != 0) {
sway_log(SWAY_ERROR, "Unable to drop root group, refusing to start");