From: Pádraig Brady <P@draigBrady.com>
Date: Sat, 22 Apr 2023 20:41:53 +0000 (+0100)
Subject: tsort: diagnose errors reading the input
X-Git-Tag: v9.4~157
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e62ba282ef44567a73f93d77583a838447d7550;p=thirdparty%2Fcoreutils.git

tsort: diagnose errors reading the input

* src/tsort.c (tsort): Check for errors after readtoken().
* NEWS: Mention the bug fix.
---

diff --git a/NEWS b/NEWS
index a8db32246b..2c68b1735f 100644
--- a/NEWS
+++ b/NEWS
@@ -11,6 +11,9 @@ GNU coreutils NEWS                                    -*- outline -*-
   Previously such file names would have caused the strip process to fail.
   [This bug was present in "the beginning".]
 
+  tsort now diagnoses read errors on the input.
+  [This bug was present in "the beginning".]
+
 
 * Noteworthy changes in release 9.3 (2023-04-18) [stable]
 
diff --git a/src/tsort.c b/src/tsort.c
index 0032cb5d0b..2775fb39eb 100644
--- a/src/tsort.c
+++ b/src/tsort.c
@@ -453,7 +453,11 @@ tsort (char const *file)
       /* T2. Next Relation.  */
       size_t len = readtoken (stdin, DELIM, sizeof (DELIM) - 1, &tokenbuffer);
       if (len == (size_t) -1)
-        break;
+        {
+          if (ferror (stdin))
+            die (EXIT_FAILURE, errno, _("%s: read error"), quotef (file));
+          break;
+        }
 
       assert (len != 0);