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diff -uNr strace-4.24/strace.c strace-4.24.mod/strace.c
--- strace-4.24/strace.c 2018-07-11 03:00:57.000000000 +0300
+++ strace-4.24.mod/strace.c 2018-10-03 01:15:15.105370170 +0300
@@ -442,11 +442,7 @@
static void
swap_uid(void)
{
- int euid = geteuid(), uid = getuid();
-
- if (euid != uid && setreuid(euid, uid) < 0) {
- perror_msg_and_die("setreuid");
- }
+ return;
}
static FILE *
@@ -1182,25 +1178,6 @@
}
}
- if (username != NULL) {
- /*
- * It is important to set groups before we
- * lose privileges on setuid.
- */
- if (initgroups(username, run_gid) < 0) {
- perror_msg_and_die("initgroups");
- }
- if (setregid(run_gid, params->run_egid) < 0) {
- perror_msg_and_die("setregid");
- }
- if (setreuid(run_uid, params->run_euid) < 0) {
- perror_msg_and_die("setreuid");
- }
- } else if (geteuid() != 0)
- if (setreuid(run_uid, run_uid) < 0) {
- perror_msg_and_die("setreuid");
- }
-
if (!daemonized_tracer) {
/*
* Induce a ptrace stop. Tracer (our parent)