NAME

       readdir - directory input parser for gawk

SYNOPSIS

       @load "readdir"

DESCRIPTION

       The readdir extension adds an input parser for directories.

       When  this  extension is in use, instead of skipping directories named on the command line
       (or with getline), they are read, with each entry returned as a record.

       The record consists of three fields. The first two are the inode number and the  filename,
       separated by a forward slash character.  On systems where the directory entry contains the
       file type, the record has a third field which is a single letter indicating  the  type  of
       the  file:  f for file, d for directory, b for a block device, c for a character device, p
       for a FIFO, l for a symbolic link, s for a socket.

       On systems without the file type information, the extension falls back to calling stat(2),
       in order to provide the information.  Thus the third field should never be u.

       By  default,  if  a  directory cannot be opened (due to permission problems, for example),
       gawk will exit.  As with regular files, this situation can be handled  using  a  BEGINFILE
       rule that checks ERRNO and prints an error or otherwise handles the problem.

EXAMPLE

       @load "readdir"
       ...
       BEGIN { FS = "/" }
       { print "file name is", $2 }

SEE ALSO

       GAWK:  Effective  AWK  Programming, filefuncs(3am), fnmatch(3am), fork(3am), inplace(3am),
       ordchr(3am), readfile(3am), revoutput(3am), rwarray(3am), time(3am).

       opendir(3), readdir(3), stat(2).

AUTHOR

       Arnold Robbins, arnold@skeeve.com.

COPYING PERMISSIONS

       Copyright © 2012, 2013, 2018, 2019 Free Software Foundation, Inc.

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