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authorDenys Vlasenko <vda.linux@googlemail.com>2012-07-10 23:27:15 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2012-07-10 23:27:15 (GMT)
commitdf8066a78ccd9b899244145f6be0171957a41a1e (patch)
tree1deceaacbf772c04dbcf84173b7b23e66b7f8598
parente1db338a5187c008819932a4166f3aa27958c48e (diff)
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awk: fix FS assignment behavior. Closes 5108
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--editors/awk.c12
-rwxr-xr-xtestsuite/awk.tests7
2 files changed, 19 insertions, 0 deletions
diff --git a/editors/awk.c b/editors/awk.c
index d69720d..42f6ef8 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -1812,6 +1812,18 @@ static void handle_special(var *v)
is_f0_split = FALSE;
} else if (v == intvar[FS]) {
+ /*
+ * The POSIX-2008 standard says that changing FS should have no effect on the
+ * current input line, but only on the next one. The language is:
+ *
+ * > Before the first reference to a field in the record is evaluated, the record
+ * > shall be split into fields, according to the rules in Regular Expressions,
+ * > using the value of FS that was current at the time the record was read.
+ *
+ * So, split up current line before assignment to FS:
+ */
+ split_f0();
+
mk_splitter(getvar_s(v), &fsplitter);
} else if (v == intvar[RS]) {
diff --git a/testsuite/awk.tests b/testsuite/awk.tests
index d4c390d..f9c3b6b 100755
--- a/testsuite/awk.tests
+++ b/testsuite/awk.tests
@@ -217,4 +217,11 @@ end d
testing "awk handles empty ()" \
"awk 'BEGIN {print()}' 2>&1" "awk: cmd. line:1: Empty sequence\n" "" ""
+testing "awk FS assignment" "awk '{FS=\":\"; print \$1}'" \
+ "a:b\ne\n" \
+ "" \
+ "a:b c:d\ne:f g:h"
+
+# testing "description" "command" "result" "infile" "stdin"
+
exit $FAILCOUNT