sort: make sort -o FILE FILE (same FILE) work. Closes bug 785. -3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/testsuite/sort.tests b/testsuite/sort.tests
index 5ed29fb12..72df80b1f 100755
--- a/testsuite/sort.tests
+++ b/testsuite/sort.tests
@@ -27,6 +27,8 @@ egg	1	2	papyrus
 999     3       0       algebra
 "
 
+# testing "description" "command(s)" "result" "infile" "stdin"
+
 # Sorting with keys
 
 testing "sort one key" "sort -k4,4 input" \
@@ -115,4 +117,15 @@ one\0two\0three\0\
 testing "sort key doesn't strip leading blanks, disables fallback global sort" \
 "sort -n -k2 -t ' '" " a \n 1 \n 2 \n" "" " 2 \n 1 \n a \n"
 
+testing "sort file in place" \
+"strace -oZZZ sort -o input input && cat input" "\
+111
+222
+" "\
+222
+111
+" ""
+
+# testing "description" "command(s)" "result" "infile" "stdin"
+
 exit $FAILCOUNT