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

       errno - convert errno values to strings and vice versa

       @load "errno"

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

       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:

              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.

              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.

              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.

       @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)


       Andrew Schorr

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

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Free Software Foundation           Jan 15 2013                        ERRNO(3am)