From: Collin Funk <collin.funk1@gmail.com>
Date: Thu, 26 Feb 2026 04:59:35 +0000 (-0800)
Subject: id: promptly diagnose write errors
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4195e36664f800dc13291d5e0ceb2935b71fe2f0;p=thirdparty%2Fcoreutils.git

id: promptly diagnose write errors

* NEWS: Mention the improvement.
* src/id.c (print_stuff): Call fflush for each listed user to check for
write errors.
* tests/misc/io-errors.sh: Add an invocation of 'id'.
---

diff --git a/NEWS b/NEWS
index 7567a488f1..a01a13acc2 100644
--- a/NEWS
+++ b/NEWS
@@ -18,8 +18,8 @@ GNU coreutils NEWS                                    -*- outline -*-
 
 ** Improvements
 
-  'groups' will now exit immediately upon receiving a write error, which is
-  significant when listing information for many users.
+  'groups' and 'id' will now exit immediately upon receiving a write error,
+  which is significant when listing information for many users.
 
   'nl' now supports multi-byte --section-delimiter characters.
 
diff --git a/src/id.c b/src/id.c
index 9ba880ad88..02c3bf9b50 100644
--- a/src/id.c
+++ b/src/id.c
@@ -458,4 +458,7 @@ print_stuff (char const *pw_name)
     {
       putchar (opt_zero ? '\0' : '\n');
     }
+
+  if (fflush (stdout) < 0)
+    write_error ();
 }
diff --git a/tests/misc/io-errors.sh b/tests/misc/io-errors.sh
index 29929f652c..e947df142b 100755
--- a/tests/misc/io-errors.sh
+++ b/tests/misc/io-errors.sh
@@ -46,6 +46,7 @@ fold -b foo
 fold -c foo
 groups
 head -n1 foo
+id
 join foo foo
 nl foo
 numfmt --invalid=ignore < foo