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Annotation of 43BSDReno/lib/libc/stdio/ungetc.3, revision 1.1

1.1     ! root        1: .\"    @(#)ungetc.3    6.2 (Berkeley) 4/1/89
        !             2: .\"
        !             3: .TH UNGETC 3  "April 1, 1989"
        !             4: .AT 3
        !             5: .SH NAME
        !             6: ungetc \- push character back into input stream
        !             7: .SH SYNOPSIS
        !             8: .B #include <stdio.h>
        !             9: .PP
        !            10: .B ungetc(c, stream)
        !            11: .br
        !            12: .SM
        !            13: .B FILE
        !            14: .B *stream;
        !            15: .SH DESCRIPTION
        !            16: .I Ungetc
        !            17: pushes the character
        !            18: .I c
        !            19: back on an input stream.  That character will be returned by the next
        !            20: .I getc
        !            21: call on that stream.
        !            22: .I Ungetc 
        !            23: returns 
        !            24: .IR c .
        !            25: .PP
        !            26: One character of pushback is guaranteed provided
        !            27: something has been read from the stream and the stream is actually buffered.
        !            28: Attempts to push EOF are rejected.
        !            29: .PP
        !            30: .IR  Fseek (3)
        !            31: erases all memory of pushed back characters.
        !            32: .SH "SEE ALSO"
        !            33: getc(3),
        !            34: setbuf(3),
        !            35: fseek(3)
        !            36: .SH DIAGNOSTICS
        !            37: .I Ungetc
        !            38: returns
        !            39: .SM
        !            40: .B EOF
        !            41: if it can't push a character back.

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