GETC(3) BSD Programmer's Manual GETC(3)
fgetc, getc, getchar, getw - get next character or word from input stream
The fgetc() function obtains the next input character (if present) from
the stream pointed at by stream, or the next character pushed back on the
stream via ungetc.
The getc() function acts essentially identically to fgetc(), but is a
macro that expands in-line.
The getchar() function is equivalent to: getc with the argument stdin.
The getw() function obtains the next int (if present) from the stream
pointed at by stream.
If successful, these routines return the next requested object from the
stream. If the stream is at end-of-file or a read error occurs, the rou-
tines return EOF. The routines feof(3) and ferror(3) must be used to dis-
tinguish between end-of-file and error. If an error occurs, the global
variable errno is set to indicate the error. The end-of-file condition
is remembered, even on a terminal, and all subsequent attempts to read
will return EOF until the condition is cleared with clearerr.
ferror(3), fread(3), fopen(3), putc(3), ungetc(3)
The fgetc(), getc() and getchar() functions conform to ANSI C X3.159-1989
(``ANSI C '').
Since EOF is a valid integer value, feof and ferror must be used to check
for failure after calling getw(). The size and byte order of an int
varies from one machine to another, and getw() is not recommended for
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