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@(#)getc.3 8.1 (Berkeley) 6/4/93
$Id$
.Dd June 4, 1993 .Dt GETC 3 .Os .Sh NAME .Nm fgetc , .Nm getc , .Nm getchar , .Nm getw .Nd get next character or word from input stream .Sh SYNOPSIS .Fd #include <stdio.h> .Ft int .Fn fgetc "FILE *stream" .Ft int .Fn getc "FILE *stream" .Ft int .Fn getchar .Ft int .Fn getw "FILE *stream" .Sh DESCRIPTION The .Fn fgetc function obtains the next input character (if present) from the stream pointed at by .Fa stream , or the next character pushed back on the stream via .Xr ungetc 3 .
p The .Fn getc function acts essentially identically to .Fn fgetc , but is a macro that expands in-line.
p The .Fn getchar function is equivalent to: getc with the argument stdin.
p The .Fn getw function obtains the next .Em int (if present) from the stream pointed at by .Fa stream . .Sh RETURN VALUES If successful, these routines return the next requested object from the .Fa stream . If the stream is at end-of-file or a read error occurs, the routines return .Dv EOF . The routines .Xr feof 3 and .Xr ferror 3 must be used to distinguish between end-of-file and error. If an error occurs, the global variable .Va 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 .Dv EOF until the condition is cleared with .Xr clearerr 3 . .Sh SEE ALSO .Xr ferror 3 , .Xr fopen 3 , .Xr fread 3 , .Xr putc 3 , .Xr ungetc 3 .Sh STANDARDS The .Fn fgetc , .Fn getc and .Fn getchar functions conform to .St -ansiC . .Sh BUGS Since .Dv EOF is a valid integer value, .Xr feof 3 and .Xr ferror 3 must be used to check for failure after calling .Fn getw . The size and byte order of an .Em int varies from one machine to another, and .Fn getw is not recommended for portable applications.
p