| @node ungetc | |
| @section @code{ungetc} | |
| @findex ungetc | |
| POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ungetc.html} | |
| Gnulib module: --- | |
| Portability problems fixed by Gnulib: | |
| @itemize | |
| @end itemize | |
| Portability problems not fixed by Gnulib: | |
| @itemize | |
| @item | |
| On Windows platforms (excluding Cygwin), this function does not set @code{errno} | |
| upon failure. | |
| @end itemize |