errno

ERRNO(3am)                  GNU Awk Extension Modules                 ERRNO(3am)



NAME
       errno - convert errno values to strings and vice versa

SYNOPSIS
       @load "errno"

       string = strerror(11)
       string = errno2name(11)
       integer = name2errno("EAGAIN")

DESCRIPTION
       This extension is useful for working with the gawk PROCINFO ["errno"]
       value.  The errno extension adds three functions named strerror(),
       errno2name(), and name2errno(), as follows:

       strerror()
              This function takes an integer argument and returns the result
              from calling the strerror(3) C library function.  If the argument
              is not numeric, it will return an empty string.

       errno2name()
              This function takes an integer argument and returns the symbolic
              name for the associated errno value.  For example, the returned
              value might be EACCES or EAGAIN.  An empty string is returned for
              an unrecognized argument.

       name2errno()
              This function takes a string argument and returns the integer
              value associated with that symbolic errno value.  For example, if
              the argument is "EAGAIN", the returned value might be 11.  For
              unrecognized arguments, a value of -1 is returned.

EXAMPLE
       @load "errno"
       ...
       printf "The numeric value of 'EAGAIN' is %d\n", name2errno("EAGAIN")
       printf "The string value of 11 is %s\n", errno2name(11)
       printf "The description of errno 11 is '%s'\n", strerror(11)

SEE ALSO
       strerror(3)

AUTHOR
       Andrew Schorr

COPYING PERMISSIONS
       Copyright © 2012, 2013, Free Software Foundation, Inc.

       Permission is granted to make and distribute verbatim copies of this
       manual page provided the copyright notice and this permission notice are
       preserved on all copies.

       Permission is granted to copy and distribute modified versions of this
       manual page under the conditions for verbatim copying, provided that the
       entire resulting derived work is distributed under the terms of a
       permission notice identical to this one.

       Permission is granted to copy and distribute translations of this manual
       page into another language, under the above conditions for modified
       versions, except that this permission notice may be stated in a
       translation approved by the Foundation.



Free Software Foundation           Jan 15 2013                        ERRNO(3am)