Bash - command substution not working Post: 302926527

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LEARN ABOUT OPENDARWIN

putw

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

NAME

       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 https://www.kernel.org/doc/man-pages/.

GNU                                                                 2016-03-15                                                             GETW(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

#!/bin/bash has stopped working

Discussion started by: zorrokan

2. Shell Programming and Scripting

if loop not working in BASH shell

Discussion started by: npatwardhan

3. Shell Programming and Scripting

Simple BASH script not working?

Discussion started by: doubleminus

4. Shell Programming and Scripting

export not working in Bash shell

Discussion started by: amit.behera