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221 lines
7.5 KiB
EmacsLisp
221 lines
7.5 KiB
EmacsLisp
;;; pcmpl-unix.el --- standard UNIX completions
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;; Copyright (C) 1999-2019 Free Software Foundation, Inc.
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;; Package: pcomplete
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'pcomplete)
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;; User Variables:
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(defcustom pcmpl-unix-group-file "/etc/group"
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"If non-nil, a string naming the group file on your system."
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:type '(choice file (const nil))
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:group 'pcmpl-unix)
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(defcustom pcmpl-unix-passwd-file "/etc/passwd"
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"If non-nil, a string naming the passwd file on your system."
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:type '(choice file (const nil))
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:group 'pcmpl-unix)
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(defcustom pcmpl-ssh-known-hosts-file "~/.ssh/known_hosts"
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"If non-nil, a string naming your SSH \"known_hosts\" file.
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This allows one method of completion of SSH host names, the other
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being via `pcmpl-ssh-config-file'. Note that newer versions of
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ssh hash the hosts by default, to prevent Island-hopping SSH
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attacks. This can be disabled, at some risk, with the SSH option
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\"HashKnownHosts no\"."
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:type '(choice file (const nil))
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:group 'pcmpl-unix
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:version "23.1")
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(defcustom pcmpl-ssh-config-file "~/.ssh/config"
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"If non-nil, a string naming your SSH \"config\" file.
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This allows one method of completion of SSH host names, the other
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being via `pcmpl-ssh-known-hosts-file'."
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:type '(choice file (const nil))
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:group 'pcmpl-unix
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:version "24.1")
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;; Functions:
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;;;###autoload
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(defun pcomplete/cd ()
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"Completion for `cd'."
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(while (pcomplete-here (pcomplete-dirs))))
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;;;###autoload
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(defalias 'pcomplete/pushd 'pcomplete/cd)
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;;;###autoload
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(defun pcomplete/rmdir ()
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"Completion for `rmdir'."
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(while (pcomplete-here (pcomplete-dirs))))
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;;;###autoload
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(defun pcomplete/rm ()
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"Completion for `rm'."
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(let ((pcomplete-help "(fileutils)rm invocation"))
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(pcomplete-opt "dfirRv")
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(while (pcomplete-here (pcomplete-all-entries) nil
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'expand-file-name))))
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;;;###autoload
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(defun pcomplete/xargs ()
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"Completion for `xargs'."
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(pcomplete-here (funcall pcomplete-command-completion-function))
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(funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
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pcomplete-default-completion-function)))
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;;;###autoload
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(defalias 'pcomplete/time 'pcomplete/xargs)
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;;;###autoload
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(defun pcomplete/which ()
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"Completion for `which'."
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(while (pcomplete-here (funcall pcomplete-command-completion-function))))
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(defun pcmpl-unix-read-passwd-file (file)
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"Return an alist correlating gids to group names in FILE.
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If FILE is in hashed format (as described in the OpenSSH
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documentation), this function returns nil."
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(let (names)
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(when (file-readable-p file)
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(with-temp-buffer
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(insert-file-contents file)
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(goto-char (point-min))
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(while (not (eobp))
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(let* ((fields
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(split-string (buffer-substring
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(point) (progn (end-of-line)
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(point))) ":")))
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(setq names (cons (nth 0 fields) names)))
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(forward-line))))
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(pcomplete-uniquify-list names)))
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(defsubst pcmpl-unix-group-names ()
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"Read the contents of /etc/group for group names."
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(if pcmpl-unix-group-file
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(pcmpl-unix-read-passwd-file pcmpl-unix-group-file)))
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(defsubst pcmpl-unix-user-names ()
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"Read the contents of /etc/passwd for user names."
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(if pcmpl-unix-passwd-file
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(pcmpl-unix-read-passwd-file pcmpl-unix-passwd-file)))
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;;;###autoload
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(defun pcomplete/chown ()
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"Completion for the `chown' command."
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(unless (pcomplete-match "\\`-")
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(if (pcomplete-match "\\`[^.]*\\'" 0)
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(pcomplete-here* (pcmpl-unix-user-names))
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(if (pcomplete-match "\\.\\([^.]*\\)\\'" 0)
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(pcomplete-here* (pcmpl-unix-group-names)
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(pcomplete-match-string 1 0))
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(pcomplete-here*))))
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(while (pcomplete-here (pcomplete-entries))))
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;;;###autoload
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(defun pcomplete/chgrp ()
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"Completion for the `chgrp' command."
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(unless (pcomplete-match "\\`-")
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(pcomplete-here* (pcmpl-unix-group-names)))
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(while (pcomplete-here (pcomplete-entries))))
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;; ssh support by Phil Hagelberg.
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;; http://www.emacswiki.org/cgi-bin/wiki/pcmpl-ssh.el
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(defun pcmpl-ssh-known-hosts ()
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"Return a list of hosts found in `pcmpl-ssh-known-hosts-file'."
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(when (and pcmpl-ssh-known-hosts-file
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(file-readable-p pcmpl-ssh-known-hosts-file))
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(with-temp-buffer
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(insert-file-contents-literally pcmpl-ssh-known-hosts-file)
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(let ((host-re "\\(?:\\([-.[:alnum:]]+\\)\\|\\[\\([-.[:alnum:]]+\\)\\]:[0-9]+\\)[, ]")
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ssh-hosts-list)
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(while (re-search-forward (concat "^ *" host-re) nil t)
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(add-to-list 'ssh-hosts-list (concat (match-string 1)
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(match-string 2)))
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(while (and (eq (char-before) ?,)
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(re-search-forward host-re (line-end-position) t))
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(add-to-list 'ssh-hosts-list (concat (match-string 1)
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(match-string 2)))))
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ssh-hosts-list))))
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(defun pcmpl-ssh-config-hosts ()
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"Return a list of hosts found in `pcmpl-ssh-config-file'."
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(when (and pcmpl-ssh-config-file
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(file-readable-p pcmpl-ssh-config-file))
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(with-temp-buffer
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(insert-file-contents-literally pcmpl-ssh-config-file)
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(let (ssh-hosts-list
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(case-fold-search t))
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(while (re-search-forward "^ *host\\(name\\)? +\\([-.[:alnum:]]+\\)"
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nil t)
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(add-to-list 'ssh-hosts-list (match-string 2)))
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ssh-hosts-list))))
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(defun pcmpl-ssh-hosts ()
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"Return a list of known SSH hosts.
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Uses both `pcmpl-ssh-config-file' and `pcmpl-ssh-known-hosts-file'."
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(let ((hosts (pcmpl-ssh-known-hosts)))
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(dolist (h (pcmpl-ssh-config-hosts))
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(add-to-list 'hosts h))
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hosts))
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;;;###autoload
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(defun pcomplete/ssh ()
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"Completion rules for the `ssh' command."
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(pcomplete-opt "1246AaCfgKkMNnqsTtVvXxYbcDeFiLlmOopRSw")
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(pcomplete-here (pcmpl-ssh-hosts)))
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;;;###autoload
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(defun pcomplete/scp ()
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"Completion rules for the `scp' command.
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Includes files as well as host names followed by a colon."
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(pcomplete-opt "1246BCpqrvcFiloPS")
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(while t (pcomplete-here
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(lambda (string pred action)
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(let ((table
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(cond
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((string-match "\\`[^:/]+:" string) ; Remote file name.
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(if (and (eq action 'lambda)
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(eq (match-end 0) (length string)))
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;; Avoid connecting to the remote host when we're
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;; only completing the host name.
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(list string)
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(completion-table-subvert (pcomplete-all-entries)
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"" "/ssh:")))
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((string-match "/" string) ; Local file name.
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(pcomplete-all-entries))
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(t ;Host name or local file name.
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(append (all-completions string (pcomplete-all-entries))
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(mapcar (lambda (host) (concat host ":"))
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(pcmpl-ssh-hosts)))))))
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(complete-with-action action table string pred))))))
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(provide 'pcmpl-unix)
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;;; pcmpl-unix.el ends here
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