From: nekral-guest <nekral-guest@5a98b0ae-9ef6-0310-add3-de5d479b70d7>
Date: Tue, 21 Apr 2009 22:46:01 +0000 (+0000)
Subject: 	* src/login.c: Check if login is run with effective root
X-Git-Tag: 4.1.4~143
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=efcbbc3d74b99fa98d2b402534064905e9dd0317;p=shadow

	* src/login.c: Check if login is run with effective root
	privileges. This should be more helpful to users than a failure to
	find an utmp entry or failure to access a file.
---

diff --git a/ChangeLog b/ChangeLog
index 1b668be7..573e6873 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-04-22  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* src/login.c: Check if login is run with effective root
+	privileges. This should be more helpful to users than a failure to
+	find an utmp entry or failure to access a file.
+
 2009-04-22  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* libmisc/utmp.c: Reworked. Get rid of Linux specific stuff. Get rid
diff --git a/src/login.c b/src/login.c
index 1e0a39ed..3f2068e0 100644
--- a/src/login.c
+++ b/src/login.c
@@ -510,6 +510,11 @@ int main (int argc, char **argv)
 	amroot = (getuid () == 0);
 	Prog = Basename (argv[0]);
 
+	if (geteuid() != 0) {
+		fprintf (stderr, _("%s: Cannot possibly work without effective root\n"), Prog);
+		exit (1);
+	}
+
 	process_flags (argc, argv);
 
 	if ((isatty (0) == 0) || (isatty (1) == 0) || (isatty (2) == 0)) {