[groff] 08/20: [pfbtops]: Tweak command-line option handling.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 69bdfa7dcd64a65ac5504b28467ea452a2e3ef3a
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Fri Oct 18 18:04:22 2024 -0500

    [pfbtops]: Tweak command-line option handling.
    
    * src/utils/pfbtops/pfbtops.c (main): Emit our own diagnostic for an
      invalid command-line option.
---
 ChangeLog                   | 5 +++++
 src/utils/pfbtops/pfbtops.c | 8 ++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 54d470f3d..6490fa6ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2024-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * src/utils/pfbtops/pfbtops.c (main): Emit our own diagnostic
+       for an invalid command-line option.
+
 2024-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * src/roff/groff/groff.cpp (main): Emit our own diagnostic for
diff --git a/src/utils/pfbtops/pfbtops.c b/src/utils/pfbtops/pfbtops.c
index 8479739cb..0e3cbd796 100644
--- a/src/utils/pfbtops/pfbtops.c
+++ b/src/utils/pfbtops/pfbtops.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2024 Free Software Foundation, Inc.
      Written by James Clark (jjc@jclark.com)
 
 This file is part of groff.
@@ -180,7 +180,9 @@ int main(int argc, char **argv)
 
   program_name = argv[0];
 
-  while ((opt = getopt_long(argc, argv, "v", long_options, NULL)) != EOF) {
+  opterr = 0;
+  while ((opt = getopt_long(argc, argv, "v", long_options, NULL))
+        != EOF) {
     switch (opt) {
     case 'v':
       printf("GNU pfbtops (groff) version %s\n", Version_string);
@@ -191,6 +193,8 @@ int main(int argc, char **argv)
       exit(EXIT_SUCCESS);
       break;
     case '?':
+      fprintf(stderr, "%s: error: unrecognized command-line option"
+             " '%c'\n", program_name, (char) optopt);
       usage(stderr);
       exit(2);
       break;