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getw(3) [posix man page]

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

getw, putw - input and output of words (ints) 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 since 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 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 | +---------------+---------------+---------+ CONFORMING TO
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) COLOPHON
This page is part of release 4.15 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 GNU
2016-03-15 GETW(3)

Check Out this Related Man Page

PUTC(3) 						   BSD Library Functions Manual 						   PUTC(3)

fputc, putc, putc_unlocked, putchar, putchar_unlocked, putw -- output a character or word to a stream LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdio.h> int fputc(int c, FILE *stream); int putc(int c, FILE *stream); int putc_unlocked(int c, FILE *stream); int putchar(int c); int putchar_unlocked(int c); int putw(int w, FILE *stream); DESCRIPTION
The fputc() function writes the character c (converted to an ``unsigned char'') to the output stream pointed to by stream. The putc() macro acts essentially identically to fputc(), but is a macro that expands in-line. It may evaluate stream more than once, so arguments given to putc() should not be expressions with potential side effects. The putchar() function is identical to putc() with an output stream of stdout. The putw() function writes the specified int to the named output stream. The putc_unlocked() and putchar_unlocked() functions are equivalent to putc() and putchar() respectively, except that the caller is responsi- ble for locking the stream with flockfile(3) before calling them. These functions may be used to avoid the overhead of locking the stream for each character, and to avoid output being interspersed from multiple threads writing to the same stream. RETURN VALUES
The functions, fputc(), putc(), putchar(), putc_unlocked(), and putchar_unlocked() return the character written. If an error occurs, the value EOF is returned. The putw() function returns 0 on success; EOF is returned if a write error occurs, or if an attempt is made to write a read-only stream. SEE ALSO
ferror(3), flockfile(3), fopen(3), getc(3), putwc(3), stdio(3) STANDARDS
The functions fputc(), putc(), and putchar(), conform to ISO/IEC 9899:1990 (``ISO C90''). The putc_unlocked() and putchar_unlocked() func- tions conform to IEEE Std 1003.1-2001 (``POSIX.1''). A function putw() function appeared in Version 6 AT&T UNIX. BUGS
The size and byte order of an int varies from one machine to another, and putw() is not recommended for portable applications. BSD
January 10, 2003 BSD
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