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Annotation of 43BSDReno/lib/libc/stdio/ungetc.3, revision 1.1.1.1

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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