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Refuse to start when SUID is detected

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This ensures that those surprised by the deprecation of SUID operation
receive an error rather than accidentally having run as root.

swaywm/sway@e572805
This commit is contained in:
Johan Malm 2022-10-14 23:27:42 +01:00 • committed by John Lindgren
parent 1c80dbd6ef
commit 573a521cf1
2 changed files with 15 additions and 32 deletions
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15
src/main.c
View file

@ -47,6 +47,19 @@ usage(void)
exit(0);
}
static void
die_on_detecting_suid(void)
{
if (geteuid() != 0 && getegid() != 0) {
return;
}
if (getuid() == geteuid() && getgid() == getegid()) {
return;
}
wlr_log(WLR_ERROR, "SUID detected - aborting");
exit(EXIT_FAILURE);
}
static void
send_signal_to_labwc_pid(int signal)
{
@ -118,6 +131,8 @@ main(int argc, char *argv[])
wlr_log_init(verbosity, NULL);
die_on_detecting_suid();
if (!rc.config_dir) {
rc.config_dir = config_dir();
}