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getw(3) — Linux manual page

getw(3)                  Library Functions Manualgetw(3)

NAME        top

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

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <stdio.h>int getw(FILE *stream);int putw(intw, FILE *stream);   Feature Test Macro Requirements for glibc (seefeature_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        top

getw() reads a word (that is, anint) fromstream.  It's provided       for compatibility with SVr4.  We recommend you usefread(3)       instead.putw() writes the wordw (that is, anint) tostream.  It is       provided for compatibility with SVr4, but we recommend you usefwrite(3) instead.

RETURN VALUE        top

       Normally,getw() returns the word read, andputw() returns 0.  On       error, they returnEOF.

ATTRIBUTES        top

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

STANDARDS        top

       None.

HISTORY        top

       SVr4, SUSv2.

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 theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17getw(3)

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