From fe3fc418380c3dae63a5da13376912f45599e5c3 Mon Sep 17 00:00:00 2001
From: sin <sin@2f30.org>
Date: Mon, 9 Feb 2015 16:01:25 +0000
Subject: [PATCH] tail: Fix tail -n -val to handle leading spaces

Previously 'tail -n "    -20" foo' was broken, now it works.
---
 tail.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tail.c b/tail.c
index 9f5bd4f..2265bac 100644
--- a/tail.c
+++ b/tail.c
@@ -74,8 +74,7 @@ main(int argc, char *argv[])
 		break;
 	case 'n':
 		lines = EARGF(usage());
-		n = estrtonum(lines[0] == '-' ? lines + 1 : lines,
-		              0, MIN(LLONG_MAX, SIZE_MAX));
+		n = MIN(llabs(estrtonum(lines, LLONG_MIN + 1, MIN(LLONG_MAX, SIZE_MAX))), SIZE_MAX);
 		if (lines[0] == '+')
 			tail = dropinit;
 		break;