From 2ac8cc9f516ec5c5991ba22d48662a40c3bd6dd0 Mon Sep 17 00:00:00 2001
From: pgen <p.gen.progs@gmail.com>
Date: Sat, 10 Jul 2021 15:00:11 +0200
Subject: Fix my_ungetc

- reset EOF flag if necessary.
- make it POSIX compliant.
---
 fgetc.c | 7 ++++++-
 fgetc.h | 2 +-
 smenu.c | 4 ++--
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/fgetc.c b/fgetc.c
index fd1e611..7da6b24 100644
--- a/fgetc.c
+++ b/fgetc.c
@@ -32,11 +32,16 @@ my_fgetc(FILE * input)
 /* Pushes character back on input. */
 /* =============================== */
 void
-my_ungetc(int c)
+my_ungetc(int c, FILE * input)
 {
   if (next_buffer_pos >= GETC_BUFF_SIZE)
     fprintf(stderr, "Error: cannot push back more than %d characters\n",
             GETC_BUFF_SIZE);
   else
+  {
     getc_buffer[next_buffer_pos++] = c;
+
+    if (feof(input))
+      clearerr(input); /* No more EOF. */
+  }
 }
diff --git a/fgetc.h b/fgetc.h
index f458928..3948588 100644
--- a/fgetc.h
+++ b/fgetc.h
@@ -10,6 +10,6 @@ int
 my_fgetc(FILE * input);
 
 void
-my_ungetc(int c);
+my_ungetc(int c, FILE * input);
 
 #endif
diff --git a/smenu.c b/smenu.c
index 7d4dabb..f6ae146 100644
--- a/smenu.c
+++ b/smenu.c
@@ -2755,10 +2755,10 @@ get_word(FILE * input, ll_t * word_delims_list, ll_t * record_delims_list,
 
       pos = strlen(utf8_buffer);
       while (pos > 0)
-        my_ungetc(utf8_buffer[--pos]);
+        my_ungetc(utf8_buffer[--pos], input);
     }
     else
-      my_ungetc(byte);
+      my_ungetc(byte, input);
   }
 
   /* Mark it as the last word of a record if its sequence matches a */
-- 
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