[git commit] cat: fix cat -e and cat -v erroneously numbering 1st line

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=d80eecb86812c1fbda652f9b995060c26ba0b155
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

function                                             old     new   delta
cat_main                                             418     421      +3

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 coreutils/cat.c     |  6 +++---
 testsuite/cat.tests | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/coreutils/cat.c b/coreutils/cat.c
index 5f02233ca..fb735f994 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -112,10 +112,10 @@ static int catv(unsigned opts, char **argv)
 	int retval = EXIT_SUCCESS;
 	int fd;
 #if ENABLE_FEATURE_CATN
-	unsigned lineno = 0;
-	unsigned eol_char = (opts & (CAT_OPT_n|CAT_OPT_b)) ? '\n' : 0x100;
+	bool eol_seen = (opts & (CAT_OPT_n|CAT_OPT_b));
+	unsigned eol_char = (eol_seen ? '\n' : 0x100);
 	unsigned skip_num_on = (opts & CAT_OPT_b) ? '\n' : 0x100;
-	bool eol_seen = 1;
+	unsigned lineno = 0;
 #endif
 
 	BUILD_BUG_ON(CAT_OPT_e != VISIBLE_ENDLINE);
diff --git a/testsuite/cat.tests b/testsuite/cat.tests
new file mode 100755
index 000000000..404ebedeb
--- /dev/null
+++ b/testsuite/cat.tests
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Copyright 2018 by Denys Vlasenko <vda.linux at googlemail.com>
+# Licensed under GPLv2, see file LICENSE in this source tree.
+
+. ./testing.sh
+
+# testing "description" "command" "result" "infile" "stdin"
+testing 'cat -e' \
+	'cat -e' \
+	'foo$\n' \
+	'' \
+	'foo\n'
+
+testing 'cat -v' \
+	'cat -v' \
+	'foo\n' \
+	'' \
+	'foo\n'
+
+exit $FAILCOUNT