getw(3) — Linux manual page

getw(3)                 Library Functions Manual                 getw(3)

NAME

       getw, putw - input and output of words (ints)

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #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:
               _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE

DESCRIPTION

       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.

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ getw(), putw()                      │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       None.

HISTORY

       SVr4, SUSv2.

BUGS

       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)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                        getw(3)

Pages that refer to this page: stdio(3)

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