ungetwc(3) Library Functions Manual ungetwc(3) ungetwc - FILE (libc -lc) #include wint_t ungetwc(wint_t wc, FILE *stream); ungetwc() ungetc(3). stream . wc WEOF WEOF. wc errno EILSEQ WEOF. wc . . . . : wc . . ungetwc() wc WEOF . attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |ungetwc() | | MT-Safe | +------------+------------------------------------+--------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. ungetwc() LC_CTYPE . fgetwc(3) 3 . . : . 6.18 8 2026 ungetwc(3)