getw(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON

GETW(3)                 Linux Programmer's Manual                GETW(3)

NAME         top

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

SYNOPSIS         top

       #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 since 2.19: */ _DEFAULT_SOURCE
                   || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
           Before glibc 2.3.3:
               _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE

DESCRIPTION         top

       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         top

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

ATTRIBUTES         top

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

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             Attribute     Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │getw(), putw()                        │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       SVr4, SUSv2.  Not present in POSIX.1.

BUGS         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                            2021-03-22                        GETW(3)

Pages that refer to this page: stdio(3)