51161: correct errno after closing xtrace FD

2 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 7472f056c..0a2a880f4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2022-12-09  Bart Schaefer  <schaefer@zsh.org>
 
+	* 51161: Src/exec.c: correct errno after closing xtrace FD
+
 	* Shohei YOSHIDA: 51111: Completion/Unix/Command/_global:
 	update completion for global to version 6.6.8
 
diff --git a/Src/exec.c b/Src/exec.c
index 1810fca5e..a1059af5e 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -4336,10 +4336,13 @@ execcmd_exec(Estate state, Execcmd_params eparams,
 	}
     }
     if (newxtrerr) {
+	int eno = errno;
 	fil = fileno(newxtrerr);
 	fclose(newxtrerr);
 	xtrerr = oxtrerr;
+	/* Call zclose() to clean up internal tables, ignore EBADF */
 	zclose(fil);
+	errno = eno;
     }
 
     zsfree(STTYval);