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) in-
stead.
RETURN VALUE
Normally, getw() returns the word read, and putw() returns 0. On er-
ror, they return EOF.
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
┌────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├────────────────────────────────────────────┼───────────────┼─────────┤
│getw(), putw() │ Thread safety │ MT-Safe │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
SVr4, SUSv2. Not present in POSIX.1.
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)
Linux man-pages 6.03 2023-02-05 getw(3)
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