fLists or filters file system objects (eg files)
f lists or filters lists of file system objects, such as
files, directories, etc. f provides a quick way to output
file system items that confirm to specific criteria.
You define this criteria by using +flags (eg +s for all
symlinks) and optionally then restricting that criteria with -flags (eg
-x to remove all executable items). All flags supported as
+ are also supported as a -.
By default f will return no results. You need to include
+flags.
Output is a JSON array as this format preserves whitespace in file names.
f options -> <stdout>
<stdin> -> f options -> <stdout>f +dReturn file and directories but exclude symlinks:
f +fd -sFilter out files in a list (eg created by g) using
conditions set by f:
g '*.go' -> f +f
rx '\.(txt|md)' -> f +fw+ include files (pair this with any other flag apart
from -)- exclude files (pair this with any other flag apart
from +)? deprecated – use i insteadD regular directoriesE other read permissionsF regular files (exc symlinks, devices, sockets, named
pipes, etc)Q other write permissionsR user read permissionsS socketsW user write permissionsX user execute permissionsZ other execute permissionsb block devicesc character devicesd all directories (inc symlinks)e group read permissionsf all files (inc symlinks, devices, sockets, name
pipes, etc)i irregular files (nothing else is known about these
files)l symlinksp POSIX named pipes (FIFO)q group write permissionsr read permissions (user, group, or other)s symlinksw write permissions (user, group, or other)x execute permissions (user, group, or other)z group execute permissions+ flags are always matched first. Then the
- flags are used to filter out any matches from the
+ flags.
frx: Regexp pattern matching for file system objects (eg
.*\\.txt)g: Glob
pattern matching for file system objects (eg *.txt)json: JavaScript Object
Notation (JSON)This document was generated from builtins/core/io/f_doc.yaml.
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Last built on Mon Oct 12 23:53:07 UTC 2026 against commit 6332fa16332fa1e89d3a5df5c6104d7f19d017367bb74f9.
Current version is 7.3.1232 (unknown) which has been verified against tests cases.