diff options
Diffstat (limited to 'manual/stdio.texi')
| -rw-r--r-- | manual/stdio.texi | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi index ce27805557..da29f43867 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -1383,9 +1383,10 @@ If @var{c} is @code{EOF}, @code{ungetc} does nothing and just returns The character that you push back doesn't have to be the same as the last character that was actually read from the stream. In fact, it isn't necessary to actually read any characters from the stream before -unreading them with @code{ungetc}! But that is a strange way to write -a program; usually @code{ungetc} is used only to unread a character -that was just read from the same stream. +unreading them with @code{ungetc}! But that is a strange way to write a +program; usually @code{ungetc} is used only to unread a character that +was just read from the same stream. The GNU C library supports this +even on files opened in binary mode, but other systems might not. The GNU C library only supports one character of pushback---in other words, it does not work to call @code{ungetc} twice without doing input |