Add POSIX euid and egid properties

Author: elicn

qiling/loader/elf.py

@@ -363,9 +363,9 @@ def __push_str(top: int, s: str) -> int:
             (AUX.AT_FLAGS, 0),
             (AUX.AT_ENTRY, elf_entry),
             (AUX.AT_UID, self.ql.os.uid),
-            (AUX.AT_EUID, self.ql.os.uid),
+            (AUX.AT_EUID, self.ql.os.euid),
             (AUX.AT_GID, self.ql.os.gid),
-            (AUX.AT_EGID, self.ql.os.gid),
+            (AUX.AT_EGID, self.ql.os.egid),
             (AUX.AT_HWCAP, elf_hwcap),
             (AUX.AT_CLKTCK, 100),
             (AUX.AT_RANDOM, randstraddr),

qiling/os/posix/posix.py

@@ -59,12 +59,8 @@ def __init__(self, ql: Qiling):
         self.ql = ql
         self.sigaction_act = [0] * 256
 
-        if self.ql.root:
-            self.uid = 0
-            self.gid = 0
-        else:
-            self.uid = self.profile.getint("KERNEL","uid")
-            self.gid = self.profile.getint("KERNEL","gid")
+        self.uid = self.euid = self.profile.getint("KERNEL","uid")
+        self.gid = self.egid = self.profile.getint("KERNEL","gid")
 
         self.pid = self.profile.getint("KERNEL", "pid")
         self.ipv6 = self.profile.getboolean("NETWORK", "ipv6")