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ungetc(3s) [bsd man page]

UNGETC(3S)																UNGETC(3S)

ungetc - push character back into input stream SYNOPSIS
#include <stdio.h> ungetc(c, stream) FILE *stream; DESCRIPTION
Ungetc pushes the character c back on an input stream. That character will be returned by the next getc call on that stream. Ungetc returns c. One character of pushback is guaranteed provided something has been read from the stream and the stream is actually buffered. Attempts to push EOF are rejected. Fseek(3S) erases all memory of pushed back characters. SEE ALSO
getc(3S), setbuf(3S), fseek(3S) DIAGNOSTICS
Ungetc returns EOF if it can't push a character back. 7th Edition May 15, 1985 UNGETC(3S)

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ungetc(3S)																ungetc(3S)

ungetc() - push character back into input stream SYNOPSIS
Obsolescent Interface DESCRIPTION
inserts the character c (converted to an unsigned char) into the buffer associated with an input stream. That character, c, is returned by the next call to (see getc(3S)) on that stream. A successful intervening call to a file positioning function with stream or erases all memory of the inserted characters. affects only the buffer associated with the input stream. It does not affect the contents of the file corresponding to stream. One character of pushback is guaranteed. If c equals EOF, does nothing to the buffer and returns EOF. Obsolescent Interface pushes character back into input stream. APPLICATION USAGE
After is applied to a stream, the stream becomes byte-oriented (see orientation(5)). RETURN VALUE
If successful, and return c and clear the end-of-file indicator for the stream. and return EOF if they cannot insert the character. WARNINGS
is an obsolescent interface supported only for compatibility with existing DCE applications. New multithreaded applications should use SEE ALSO
flockfile(3S), fseek(3S), fgetpos(3S), getc(3S), setbuf(3S), orientation(5), thread_safety(5). STANDARDS CONFORMANCE
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