From 104d544fd740c9d583893a476935f0e7fd44345c Mon Sep 17 00:00:00 2001
From: Denis Vlasenko
Date: Wed, 19 Mar 2008 23:25:00 +0000
Subject: die_if_bad_username: shrink:  88 -> 77 bytes

---
 libbb/die_if_bad_username.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/libbb/die_if_bad_username.c b/libbb/die_if_bad_username.c
index 251b1f0..337ac60 100644
--- a/libbb/die_if_bad_username.c
+++ b/libbb/die_if_bad_username.c
@@ -18,17 +18,19 @@
 
 void die_if_bad_username(const char *name)
 {
-	int i = 0;
-
+	goto skip; /* 1st char being dash isn't valid */
 	do {
-		if (!isalnum(*name)
-		 && !(*name == '_')
-		 && !(*name == '.')
-		 && !(*name == '@')
-		 && !(*name == '-' && i)
-		 && !(*name == '$' && !*(name + 1))
-		)
-			bb_error_msg_and_die("illegal character '%c'", *name);
-		i++;
+		if (*name == '-')
+			continue;
+ skip:
+		if (isalnum(*name)
+		 || *name == '_'
+		 || *name == '.'
+		 || *name == '@'
+		 || (*name == '$' && !*(name + 1))
+		) {
+			continue;
+		}
+		bb_error_msg_and_die("illegal character '%c'", *name);
 	} while (*++name);
 }
-- 
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