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authorDavid Thompson <davet@gnu.org>2015-07-01 20:32:07 -0400
committerDavid Thompson <dthompson2@worcester.edu>2015-11-01 18:20:04 -0500
commit32efa254a80672bdf5199b8e200764615a3cf68b (patch)
tree9b1b5c543352eff8b7b795ad0576f07e04ddde66 /guix/scripts
parent7c5a442091175361263ca15c50432488c5af89f6 (diff)
scripts: Add 'container' subcommand.
* guix/scripts/container.scm: New file. * guix/scripts/container/exec.scm: New file. * po/guix/POTFILES.in: Add them. * Makefile.am (MODULES): Add them. * doc/guix.texi (Invoking guix container): New section.
Diffstat (limited to 'guix/scripts')
-rw-r--r--guix/scripts/container.scm63
-rw-r--r--guix/scripts/container/exec.scm86
2 files changed, 149 insertions, 0 deletions
diff --git a/guix/scripts/container.scm b/guix/scripts/container.scm
new file mode 100644
index 0000000000..cd9f345b68
--- /dev/null
+++ b/guix/scripts/container.scm
@@ -0,0 +1,63 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix scripts container)
+ #:use-module (ice-9 match)
+ #:use-module (guix ui)
+ #:export (guix-container))
+
+(define (show-help)
+ (display (_ "Usage: guix container ACTION ARGS...
+Build and manipulate Linux containers.\n"))
+ (newline)
+ (display (_ "The valid values for ACTION are:\n"))
+ (newline)
+ (display (_ "\
+ exec execute a command inside of an existing container\n"))
+ (newline)
+ (display (_ "
+ -h, --help display this help and exit"))
+ (display (_ "
+ -V, --version display version information and exit"))
+ (newline)
+ (show-bug-report-information))
+
+(define %actions '("exec"))
+
+(define (resolve-action name)
+ (let ((module (resolve-interface
+ `(guix scripts container ,(string->symbol name))))
+ (proc (string->symbol (string-append "guix-container-" name))))
+ (module-ref module proc)))
+
+(define (guix-container . args)
+ (with-error-handling
+ (match args
+ (()
+ (format (current-error-port)
+ (_ "guix container: missing action~%")))
+ ((or ("-h") ("--help"))
+ (show-help)
+ (exit 0))
+ (("--version")
+ (show-version-and-exit "guix container"))
+ ((action args ...)
+ (if (member action %actions)
+ (apply (resolve-action action) args)
+ (format (current-error-port)
+ (_ "guix container: invalid action~%")))))))
diff --git a/guix/scripts/container/exec.scm b/guix/scripts/container/exec.scm
new file mode 100644
index 0000000000..b842fd38aa
--- /dev/null
+++ b/guix/scripts/container/exec.scm
@@ -0,0 +1,86 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix scripts container exec)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-37)
+ #:use-module (guix scripts)
+ #:use-module (guix ui)
+ #:use-module (guix utils)
+ #:use-module (gnu build linux-container)
+ #:export (guix-container-exec))
+
+(define %options
+ (list (option '(#\h "help") #f #f
+ (lambda args
+ (show-help)
+ (exit 0)))
+ (option '(#\V "version") #f #f
+ (lambda args
+ (show-version-and-exit "guix container exec")))))
+
+(define (show-help)
+ (display (_ "Usage: guix container exec PID COMMAND [ARGS...]
+Execute COMMMAND within the container process PID.\n"))
+ (newline)
+ (display (_ "
+ -h, --help display this help and exit"))
+ (display (_ "
+ -V, --version display version information and exit"))
+ (newline)
+ (show-bug-report-information))
+
+(define (partition-args args)
+ "Split ARGS into two lists; one containing the arguments for this program,
+and the other containing arguments for the command to be executed."
+ (break (lambda (arg)
+ ;; Split after the pid argument.
+ (not (false-if-exception (string->number arg))))
+ args))
+
+(define (guix-container-exec . args)
+ (define (handle-argument arg result)
+ (if (assoc-ref result 'pid)
+ (leave (_ "~a: extraneous argument~%") arg)
+ (alist-cons 'pid (string->number* arg) result)))
+
+ (with-error-handling
+ (let-values (((args command) (partition-args args)))
+ (let* ((opts (parse-command-line args %options '(())
+ #:argument-handler
+ handle-argument))
+ (pid (assoc-ref opts 'pid)))
+
+ (unless pid
+ (leave (_ "no pid specified~%")))
+
+ (when (null? command)
+ (leave (_ "no command specified~%")))
+
+ (unless (file-exists? (string-append "/proc/" (number->string pid)))
+ (leave (_ "no such process ~d~%") pid))
+
+ (let ((result (container-excursion pid
+ (lambda ()
+ (match command
+ ((program . program-args)
+ (apply execlp program program program-args)))))))
+ (unless (zero? result)
+ (leave (_ "exec failed with status ~d~%") result)))))))