The branch stable/13 has been updated by markj:
URL:
https://cgit.FreeBSD.org/src/commit/?id=91af1b8001d34a1563d861f1da81deaa121adca8
commit 91af1b8001d34a1563d861f1da81deaa121adca8
Author: Mohamed Akram <mohd.ak...@outlook.com>
AuthorDate: 2024-12-23 19:06:09 +0000
Commit: Mark Johnston <ma...@freebsd.org>
CommitDate: 2025-01-14 14:43:05 +0000
sed: Fix handling of an empty pattern space
Add a regression test.
PR: 271791
Obtained from: OpenBSD (1.38 millert)
MFC after: 2 weeks
(cherry picked from commit 5982237f1e5a30b6b7d67b307b4d3685b00718bf)
---
usr.bin/sed/process.c | 10 ++++------
usr.bin/sed/tests/sed2_test.sh | 14 ++++++++++++++
2 files changed, 18 insertions(+), 6 deletions(-)
diff --git a/usr.bin/sed/process.c b/usr.bin/sed/process.c
index 3d88096ffb77..945db462a601 100644
--- a/usr.bin/sed/process.c
+++ b/usr.bin/sed/process.c
@@ -439,14 +439,12 @@ substitute(struct s_command *cp)
* and at the end of the line, terminate.
*/
if (match[0].rm_so == match[0].rm_eo) {
- if (*s == '\0' || *s == '\n')
- slen = -1;
- else
- slen--;
- if (*s != '\0') {
+ if (slen > 0) {
cspace(&SS, s++, 1, APPEND);
+ slen--;
le++;
- }
+ } else
+ slen = -1;
lastempty = 1;
} else
lastempty = 0;
diff --git a/usr.bin/sed/tests/sed2_test.sh b/usr.bin/sed/tests/sed2_test.sh
index f50619612561..0b849b1ea132 100755
--- a/usr.bin/sed/tests/sed2_test.sh
+++ b/usr.bin/sed/tests/sed2_test.sh
@@ -159,6 +159,19 @@ minus_e_body()
atf_check -o 'inline:--\nab\n' sed $'1 i\\\n--' a
}
+atf_test_case command_D
+command_D_head()
+{
+ atf_set "descr" "Test handling of an empty pattern space"
+}
+command_D_body()
+{
+ printf "hello\n\nworld\n" > a
+
+ atf_check -o file:a sed -e 's/^//;P;D' a
+ atf_check -o file:a sed -e 's/^//;$!N;P;D' a
+}
+
atf_init_test_cases()
{
atf_add_test_case inplace_command_q
@@ -169,4 +182,5 @@ atf_init_test_cases()
atf_add_test_case hex_subst
atf_add_test_case bracket_y
atf_add_test_case minus_e
+ atf_add_test_case command_D
}
