getw - Man Page

input and output of words (ints)


Standard C library (libc, -lc)


#include <stdio.h>

int getw(FILE *stream);
int putw(int w, FILE *stream);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

getw(), putw():

    Since glibc 2.3.3:
        _XOPEN_SOURCE && ! (_POSIX_C_SOURCE >= 200112L)
            || /* glibc >= 2.19: */ _DEFAULT_SOURCE
            || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
    Before glibc 2.3.3:


getw() reads a word (that is, an int) from stream. It's provided for compatibility with SVr4. We recommend you use fread(3) instead.

putw() writes the word w (that is, an int) to stream. It is provided for compatibility with SVr4, but we recommend you use fwrite(3) instead.

Return Value

Normally, getw() returns the word read, and putw() returns 0. On error, they return EOF.


For an explanation of the terms used in this section, see attributes(7).

getw(), putw()Thread safetyMT-Safe


SVr4, SUSv2. Not present in POSIX.1.


The value returned on error is also a legitimate data value. ferror(3) can be used to distinguish between the two cases.

See Also

ferror(3), fread(3), fwrite(3), getc(3), putc(3)

Referenced By


The man page putw(3) is an alias of getw(3).

2023-02-05 Linux man-pages 6.03