Version to 1.2.0+dmbcs.

* tests/redirect.scm: New file.
* Makefile.am (TESTS): Register it.
* src/mcron/redirect.scm (with-mail-out): Adapt to facilitate testing.

Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in.
 # Copyright © 2003 Dale Mellor <dale_mellor@users.sourceforge.net>
-# Copyright © 2015, 2016, 2017, 2018 Mathieu Lirzin <mthl@gnu.org>
+# Copyright © 2015, 2016, 2017, 2018, 2020 Mathieu Lirzin <mthl@gnu.org>
 #
 # This file is part of GNU Mcron.
 #
@@ -21,40 +21,18 @@
 ## Programs.  ##
 ## ---------- ##
 
-bin_PROGRAMS = bin/mcron
+bin_SCRIPTS = bin/mcron
+noinst_SCRIPTS = 
 
 if MULTI_USER
-bin_PROGRAMS += bin/crontab
-sbin_PROGRAMS = bin/cron
+bin_SCRIPTS += bin/crontab
+sbin_SCRIPTS = bin/cron
 else
-noinst_PROGRAMS = bin/cron bin/crontab
+noinst_SCRIPTS += bin/cron bin/crontab
 endif
 
-AM_CPPFLAGS = \
-  -DPACKAGE_LOAD_PATH=\"$(guilesitedir)\" \
-  -DPACKAGE_LOAD_COMPILED_PATH=\"$(guilesitegodir)\" \
-  -D_GNU_SOURCE
-
-AM_CFLAGS = @GUILE_CFLAGS@
-LDADD = @GUILE_LIBS@ src/libmcron.a
-
-bin_mcron_SOURCES = src/mcron.c
-bin_mcron_DEPENDENCIES = $(compiled_modules) $(noinst_LIBRARIES)
-
-bin_cron_SOURCES = src/cron.c
-bin_cron_DEPENDENCIES = $(compiled_modules) $(noinst_LIBRARIES)
-
-bin_crontab_SOURCES = src/crontab.c
-bin_crontab_DEPENDENCIES = $(compiled_modules) $(noinst_LIBRARIES)
-
 # wrapper to be used in the build environment and for running tests.
-noinst_SCRIPTS = pre-inst-env
-
-# local library.
-noinst_LIBRARIES = src/libmcron.a
-src_libmcron_a_SOURCES = \
-  src/utils.c \
-  src/utils.h
+noinst_SCRIPTS += pre-inst-env
 
 ## --------------- ##
 ## Guile modules.  ##
@@ -97,7 +75,7 @@ compiled_modules = \
   $(pkgmodulego_DATA) \
   $(pkgscriptgo_DATA)
 
-CLEANFILES = $(compiled_modules)
+CLEANFILES = $(compiled_modules) bin/crontab bin/cron bin/mcron
 DISTCLEANFILES = src/mcron/config.scm
 
 # Unset 'GUILE_LOAD_COMPILED_PATH' altogether while compiling.  Otherwise, if
@@ -120,6 +98,25 @@ DISTCLEANFILES = src/mcron/config.scm
 	  --warn=format --warn=unbound-variable --warn=arity-mismatch \
 	  --target="$(host)" --output="$@" "$<" $(devnull_verbose)
 
+
+bin/% : src/%.in Makefile
+	$(AM_V_GEN)$(MKDIR_P) bin ; \
+	  sed	-e 's,%PREFIX%,${prefix},g'				\
+		-e 's,%modsrcdir%,${guilesitedir},g'			\
+		-e 's,%modbuilddir%,${guilesitegodir},g'		\
+		-e 's,%localstatedir%,${localstatedir},g'		\
+		-e 's,%pkglibdir%,${pkglibdir},g'			\
+		-e 's,%sysconfdir%,${sysconfdir},g'			\
+		-e 's,%localedir%,${localedir},g'			\
+		-e 's,%VERSION%,@VERSION@,g'				\
+		-e 's,%PACKAGE_BUGREPORT%,@PACKAGE_BUGREPORT@,g'	\
+		-e 's,%PACKAGE_NAME%,@PACKAGE_NAME@,g'			\
+		-e 's,%PACKAGE_URL%,@PACKAGE_URL@,g'			\
+		-e 's,%GUILE%,$(GUILE),g'				\
+	   $< > $@ ; \
+	  chmod a+x $@
+
+
 ## ------------ ##
 ## Test suite.  ##
 ## ------------ ##
@@ -136,10 +133,13 @@ SCM_LOG_DRIVER = \
 TESTS = \
   tests/basic.sh \
   tests/schedule.sh \
+  tests/schedule-2.sh \
   tests/base.scm \
   tests/environment.scm \
   tests/job-specifier.scm \
+  tests/redirect.scm \
   tests/utils.scm \
+  tests/vixie-specification.scm \
   tests/vixie-time.scm
 
 ## -------------- ##
@@ -150,6 +150,9 @@ EXTRA_DIST = \
   bootstrap \
   build-aux/guix.scm \
   HACKING \
+  src/cron.in \
+  src/crontab.in \
+  src/mcron.in \
   tests/init.sh \
   $(TESTS)
 
@@ -160,25 +163,28 @@ EXTRA_DIST = \
 # Sed command for Transforming program names.
 transform_exe = s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/
 
-if MULTI_USER
 install-exec-hook:
-	tcrontab=`echo crontab$(EXEEXT) | sed '$(transform_exe)'`; \
+if MULTI_USER
+	tcrontab=`echo crontab | sed '$(transform_exe)'`; \
 	chmod u+s $(DESTDIR)$(bindir)/$${tcrontab}
+	tcron=`echo cron | sed '$(transform_exe)'`; \
+	chmod u+s $(DESTDIR)$(sbindir)/$${tcron}
 endif
+	tmcron=`echo mcron | sed '$(transform_exe)'`;
 
 installcheck-local:
 ## Check that only expected programs are installed and configured
-	tmcron=`echo mcron$(EXEEXT) | sed '$(transform_exe)'`; \
+	tmcron=`echo mcron | sed '$(transform_exe)'`; \
 	test -e $(DESTDIR)$(bindir)/$${tmcron}
 if MULTI_USER
-	tcrontab=`echo crontab$(EXEEXT) | sed '$(transform_exe)'`; \
+	tcrontab=`echo crontab | sed '$(transform_exe)'`; \
 	test -u $(DESTDIR)$(bindir)/$${tcrontab}
-	tcron=`echo cron$(EXEEXT) | sed '$(transform_exe)'`; \
+	tcron=`echo cron | sed '$(transform_exe)'`; \
 	test -e $(DESTDIR)$(sbindir)/$${tcron}
 else !MULTI_USER
-	tcrontab=`echo crontab$(EXEEXT) | sed '$(transform_exe)'`; \
+	tcrontab=`echo crontab | sed '$(transform_exe)'`; \
 	test ! -u $(DESTDIR)$(bindir)/$${tcrontab}
-	tcron=`echo cron$(EXEEXT) | sed '$(transform_exe)'`; \
+	tcron=`echo cron | sed '$(transform_exe)'`; \
 	test ! -f $(DESTDIR)$(sbindir)/$${tcron}
 endif !MULTI_USER
 
@@ -219,10 +225,10 @@ gen_man = \
   esac
 
 $(srcdir)/doc/mcron.1: src/mcron/scripts/mcron.scm bin/mcron
-	-@prog="mcron"; man_section=1; $(gen_man)
+	-@prog="bin/mcron"; man_section=1; $(gen_man)
 
 $(srcdir)/doc/crontab.1: src/mcron/scripts/crontab.scm bin/crontab
-	-@prog="crontab"; man_section=1; $(gen_man)
+	-@prog="bin/crontab"; man_section=1;	 $(gen_man)
 
 $(srcdir)/doc/cron.8: src/mcron/scripts/cron.scm bin/cron
 	-@prog="cron"; man_section=8; $(gen_man)

NEWS

@@ -1,5 +1,14 @@
 GNU Mcron NEWS                                    -*- outline -*-
 
+* Noteworthy changes in release 1.2.0 (2020-04-22) [stable]
+
+** Improvements
+  C code removed, mcron becomes 100% Guile.
+  Make doc/mcron.texi gender neutral.
+  Have src/mcron/scripts/mcron.scm (process-user-file): use read and eval
+    instead of load.
+  New tests added for extra checks.
+
 * Noteworthy changes in release 1.1.4 (2020-04-12) [stable]
 
 ** Improvements

build-aux/guix.scm

@@ -32,16 +32,16 @@
                 '(".git" "autom4te" "Makefile.in" ".go" ".log"
                   "stamp-vti" ".dirstamp"))
            (any (λ (str) (string-suffix? str file))
-                '("trs""configure" "Makefile" "config.status" "pre-inst-env"
-                  "aclocal.m4" "bin/cron" "bin/mcron" "bin/crontab" "config.cache"
-                  "guix.scm")))))
+                '("trs" "configure" "Makefile" "config.status" "pre-inst-env"
+                  "aclocal.m4" "bin/cron" "bin/mcron" "bin/crontab"
+                  "config.cache" "guix.scm")))))
 
 (define %srcdir
   (or (current-source-directory) "."))
 
 (package
   (inherit (specification->package "mcron"))
-  (version "1.1.4")
+  (version "1.2.0")
   (source (local-file (dirname %srcdir) #:recursive? #t
                       #:select? keep-mcron-file?))
   (inputs

configure.ac

@@ -1,7 +1,7 @@
 ## Process this file with autoconf to produce a configure script.
-# Copyright © 2003, 2005, 2012, 2014 Dale Mellor
-# <dale_mellor@users.sourceforge.net>
-# Copyright © 2015, 2016, 2017, 2018 Mathieu Lirzin <mthl@gnu.org>
+#
+# Copyright © 2003, 2005, 2012, 2014 Dale Mellor <mcron-lsfnyl@rdmp.org>
+# Copyright © 2015, 2016, 2017, 2018, 2020 Mathieu Lirzin <mthl@gnu.org>
 # Copyright © 2018 宋文武 <iyzsong@member.fsf.org>
 #
 # This file is part of GNU Mcron.
@@ -20,35 +20,30 @@
 # along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.
 
 AC_PREREQ(2.61)
-AC_INIT([GNU Mcron], [1.1.4], [bug-mcron@gnu.org])
-AC_CONFIG_SRCDIR([src/mcron.c])
+AC_INIT([GNU Mcron], [1.2.0+dmbcs], [bug-mcron@gnu.org])
+AC_CONFIG_SRCDIR([src/mcron/scripts/mcron.scm])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_REQUIRE_AUX_FILE([test-driver.scm])
-AM_INIT_AUTOMAKE([subdir-objects -Wall -Wno-override std-options])
-AM_SILENT_RULES([yes])		# enables silent rules by default
+
+dnl We're fine with GNU make constructs, hence '-Wno-portability'.
+AM_INIT_AUTOMAKE([1.11 gnu silent-rules subdir-objects color-tests
+                  -Wall -Wno-override -Wno-portability std-options])
+
+AM_SILENT_RULES([yes])		# Enables silent rules by default.
 
 AC_CANONICAL_HOST
-AC_PROG_AWK
-AC_PROG_EGREP
-AM_PROG_CC_C_O
-AC_PROG_RANLIB
-AM_PROG_AR
+
+dnl We require pkg.m4 (from pkg-config) and guile.m4 (from Guile.)
+dnl Make sure they are available when generating the configure script.
+m4_pattern_forbid([^PKG_PROG])
+m4_pattern_forbid([^PKG_CHECK])
+m4_pattern_forbid([^GUILE_P])
+m4_pattern_allow([^GUILE_PKG_ERRORS])
 
 # Check for Guile development files.
 GUILE_PKG([3.0 2.2 2.0])
 
-# Set Guile flags without using GUILE_FLAGS which is requiring the unused
-# 'config.rpath' script.
-PKG_CHECK_MODULES(GUILE, [guile-$GUILE_EFFECTIVE_VERSION])
-
-# Check for 'argp' program arguments parser.
-AC_CHECK_FUNC(argp_parse, [], AC_MSG_ERROR([argp not found]))
-
-# Check for non-POSIX string formatting function.
-AC_CHECK_FUNC(asprintf, [], AC_MSG_ERROR([asprintf not found]))
-
 # Checks for programs.
-
 GUILE_PROGS
 
 AM_MISSING_PROG(HELP2MAN, help2man, $missing_dir)
@@ -76,8 +71,8 @@ AC_MSG_CHECKING([which spool directory to use])
 AC_ARG_WITH(spool-dir,
             AC_HELP_STRING([--with-spool-dir],
                            [the crontab spool directory (/var/cron/tabs)]),
-              CONFIG_SPOOL_DIR=$withval,
-              CONFIG_SPOOL_DIR=[/var/cron/tabs])
+            CONFIG_SPOOL_DIR=$withval,
+            CONFIG_SPOOL_DIR=[/var/cron/tabs])
 AC_MSG_RESULT($CONFIG_SPOOL_DIR)
 AC_SUBST(CONFIG_SPOOL_DIR)
 
@@ -85,8 +80,8 @@ AC_MSG_CHECKING([name of socket])
 AC_ARG_WITH(socket-file,
             AC_HELP_STRING([--with-socket-file],
                            [unix pathname for cron socket (/var/cron/socket)]),
-              CONFIG_SOCKET_FILE=$withval,
-              CONFIG_SOCKET_FILE=[/var/cron/socket])
+            CONFIG_SOCKET_FILE=$withval,
+            CONFIG_SOCKET_FILE=[/var/cron/socket])
 AC_MSG_RESULT($CONFIG_SOCKET_FILE)
 AC_SUBST(CONFIG_SOCKET_FILE)
 
@@ -94,8 +89,8 @@ AC_MSG_CHECKING([name of allow file])
 AC_ARG_WITH(allow-file,
             AC_HELP_STRING([--with-allow-file],
                            [the file of allowed users (/var/cron/allow)]),
-              CONFIG_ALLOW_FILE=$withval,
-              CONFIG_ALLOW_FILE=[/var/cron/allow])
+            CONFIG_ALLOW_FILE=$withval,
+            CONFIG_ALLOW_FILE=[/var/cron/allow])
 AC_MSG_RESULT($CONFIG_ALLOW_FILE)
 AC_SUBST(CONFIG_ALLOW_FILE)
 
@@ -103,8 +98,8 @@ AC_MSG_CHECKING([name of deny file])
 AC_ARG_WITH(deny-file,
             AC_HELP_STRING([--with-deny-file],
                            [the file of barred users (/var/cron/deny)]),
-              CONFIG_DENY_FILE=$withval,
-              CONFIG_DENY_FILE=[/var/cron/deny])
+            CONFIG_DENY_FILE=$withval,
+            CONFIG_DENY_FILE=[/var/cron/deny])
 AC_MSG_RESULT($CONFIG_DENY_FILE)
 AC_SUBST(CONFIG_DENY_FILE)
 
@@ -112,8 +107,8 @@ AC_MSG_CHECKING([name of PID file])
 AC_ARG_WITH(pid-file,
             AC_HELP_STRING([--with-pid-file],
                            [the file to record cron's PID (/var/run/cron.pid)]),
-              CONFIG_PID_FILE=$withval,
-              CONFIG_PID_FILE=[/var/run/cron.pid])
+            CONFIG_PID_FILE=$withval,
+            CONFIG_PID_FILE=[/var/run/cron.pid])
 AC_MSG_RESULT($CONFIG_PID_FILE)
 AC_SUBST(CONFIG_PID_FILE)
 
@@ -121,19 +116,19 @@ AC_MSG_CHECKING([directory to hold temporary files])
 AC_ARG_WITH(tmp-dir,
             AC_HELP_STRING([--with-tmp-dir],
                            [directory to hold temporary files (/tmp)]),
-              CONFIG_TMP_DIR=$withval,
-              CONFIG_TMP_DIR=[/tmp])
+            CONFIG_TMP_DIR=$withval,
+            CONFIG_TMP_DIR=[/tmp])
 AC_MSG_RESULT($CONFIG_TMP_DIR)
 AC_SUBST(CONFIG_TMP_DIR)
 
 # Include the Maintainer's Makefile fragment, if it's here.
 MAINT_MAKEFILE=/dev/null
 AS_IF([test -r "$srcdir/maint.mk"],
-  [MAINT_MAKEFILE="$srcdir/maint.mk"])
+      [MAINT_MAKEFILE="$srcdir/maint.mk"])
 AC_SUBST_FILE([MAINT_MAKEFILE])
 
 AC_CONFIG_FILES([pre-inst-env:build-aux/pre-inst-env.in],
-  [chmod +x pre-inst-env])
+                [chmod +x pre-inst-env])
 AC_CONFIG_FILES([doc/config.texi
                  Makefile
                  src/mcron/config.scm])

doc/mcron.texi

@@ -158,10 +158,10 @@ example, take the system load into consideration.
 Turns out to be easy to provide complete backwards compatibility with
 Vixie cron.
 @item
-Each user looks after his own files in his own directory.  He can use
+Each user looks after their own files in their own directory.  They can use
 more than one to break up complicated cron specifications.
 @item
-Each user can run his own daemon.  This removes the need for suid
+Each user can run their own daemon.  This removes the need for suid
 programs to manipulate the crontabs, and eliminates many security
 concerns that surround all existing cron programs.
 @item
@@ -516,7 +516,7 @@ second-to-last day of every month.
 @emph{NOTE} that this section is definitive.  If there is a difference in
 behaviour between the mcron program and this part of the manual, then
 there is a bug in the program.  This section is also copied verbatim
-from Paul Vixie's documentation for his cron program, and his
+from Paul Vixie's documentation for their cron program, and their
 copyright notice is duly reproduced below.
 
 There are three problems with this specification.
@@ -815,7 +815,7 @@ place in the part which implements the mcron personality.
 @cindex mcron arguments
 @cindex command line, mcron
 @cindex mcron command line
-Mcron should be run by the user who wants to schedule his jobs.  It
+Mcron should be run by the user who wants to schedule their jobs.  It
 may be made a background job using the facilities of the shell.  The
 basic command is @code{mcron [OPTION ...] [file ...]}  which has the
 effect of reading all the configuration files specified (subject to
@@ -1026,7 +1026,7 @@ Delete the user's crontab file, and exit.
 @item -e
 @item --edit
 Using the editor specified in the user's VISUAL or EDITOR environment
-variables, allow the user to edit his crontab.  Once the user exits the
+variables, allow the user to edit their crontab.  Once the user exits the
 editor, the crontab is checked for parseability, and if it is okay
 then it is installed as the user's new crontab and the daemon is
 notified that a change has taken place, so that the new file will
@@ -1231,7 +1231,7 @@ the mcron base.
 
 @deffn{Scheme procedure} remove-user-jobs user @
   [#:schedule @var{%global-schedule}]
-The argument @var{user} should be a string naming a user (his
+The argument @var{user} should be a string naming a user (their
 login name), or an integer UID, or an object representing the user's passwd
 entry.  All jobs on the current job list that are scheduled to be run
 under this personality are removed from the job list.

src/cron.c

@@ -1,80 +0,0 @@
-/* cron.c -- run jobs at scheduled times
-   Copyright © 2003, 2014 Dale Mellor <dale_mellor@users.sourceforge.net>
-   Copyright © 2015, 2016, 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "utils.h"
-#include <signal.h>
-#include <string.h>
-
-/* Forward declarations.  */
-static void inner_main (void *closure, int argc, char *argv[]);
-static void react_to_terminal_signal (int sig);
-static SCM set_cron_signals (void);
-
-int
-main (int argc, char *argv[])
-{
-  /* Set Guile load paths to ensure that Mcron modules will be found after
-     installation.  In a build environment let the 'pre-inst-env' script set
-     the correct paths.  */
-  if (getenv ("MCRON_UNINSTALLED") == NULL)
-    {
-      wrap_env_path ("GUILE_LOAD_PATH", PACKAGE_LOAD_PATH);
-      wrap_env_path ("GUILE_LOAD_COMPILED_PATH", PACKAGE_LOAD_COMPILED_PATH);
-    }
-
-  scm_boot_guile (argc, argv, inner_main, NULL);
-
-  return EXIT_SUCCESS;
-}
-
-/* Launch the Mcron Guile main program.  */
-static void
-inner_main (void *closure, int argc, char *argv[])
-{
-  scm_set_current_module (scm_c_resolve_module ("mcron scripts cron"));
-  scm_c_define_gsubr ("c-set-cron-signals", 0, 0, 0, set_cron_signals);
-  scm_call_0 (scm_variable_ref (scm_c_lookup ("main")));
-}
-
-/* Set up all the signal handlers.  This is necessary to perform the signal
-   processing in C because the sigaction function won't work when called from
-   Guile.  */
-static SCM
-set_cron_signals ()
-{
-  static struct sigaction sa;
-
-  memset (&sa, 0, sizeof (sa));
-  sa.sa_handler = react_to_terminal_signal;
-  sigaction (SIGTERM, &sa, 0);
-  sigaction (SIGINT,  &sa, 0);
-  sigaction (SIGQUIT, &sa, 0);
-  sigaction (SIGHUP,  &sa, 0);
-
-  return SCM_BOOL_T;
-}
-
-/* Handle signal SIG and exit.  All signals that cron handles will produce the
-   same behavior so we don't need to use SIG in the implementation.  */
-static void
-react_to_terminal_signal (int sig)
-{
-  scm_c_eval_string ("(delete-run-file)");
-  exit (EXIT_FAILURE);
-}

src/cron.in

@@ -0,0 +1,53 @@
+#!%GUILE% --no-auto-compile
+-*- scheme -*-
+!#
+
+;;;; cron -- run jobs at scheduled times
+;;; Copyright © 2003, 2012, 2020  Dale Mellor <mcron-lsfnyl@rdmp.org>
+;;; Copyright © 2015, 2016, 2018  Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(unless (getenv "MCRON_UNINSTALLED")
+  (set! %load-path (cons "%modsrcdir%" %load-path))
+  (set! %load-compiled-path (cons "%modbuilddir%" %load-compiled-path)))
+
+(use-modules  (mcron scripts cron)
+              (ice-9 command-line-processor))
+
+(process-command-line  (command-line)
+   application "cron"
+   version     "%VERSION%"
+   usage       "[OPTIONS]"
+   help-preamble
+ "Unless an option is specified, run a cron daemon as a detached process,"
+ "reading all the information in the usersʼ crontabs and in /etc/crontab."
+   option (--schedule=8 -s string->number
+                        "display the next N (or 8) jobs that will be"
+                        "run, and exit")
+   option (--noetc -n "do not check /etc/crontab for updates (use"
+                   "of this option is HIGHLY RECOMMENDED)")
+   help-postamble
+ "Mandatory or optional arguments to long options are also mandatory or "
+ "optional for any corresponding short options."
+   bug-address "%PACKAGE_BUGREPORT%"
+   copyright
+        "2003, 2012, 2015, 2016, 2018, 2020  Free Software Foundation, Inc."
+   license     GPLv3)
+
+
+(main --schedule --noetc)

src/crontab.c

@@ -1,48 +0,0 @@
-/* crontab.c -- edit users' crontab files
-   Copyright © 2003, 2014 Dale Mellor <dale_mellor@users.sourceforge.net>
-   Copyright © 2015, 2016, 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "utils.h"
-
-/* Forward declarations.  */
-static void inner_main (void *closure, int argc, char *argv[]);
-
-int
-main (int argc, char *argv[])
-{
-  /* Set Guile load paths to ensure that Mcron modules will be found after
-     installation.  In a build environment let the 'pre-inst-env' script set
-     the correct paths.  */
-  if (getenv ("MCRON_UNINSTALLED") == NULL)
-    {
-      wrap_env_path ("GUILE_LOAD_PATH", PACKAGE_LOAD_PATH);
-      wrap_env_path ("GUILE_LOAD_COMPILED_PATH", PACKAGE_LOAD_COMPILED_PATH);
-    }
-
-  scm_boot_guile (argc, argv, inner_main, NULL);
-
-  return EXIT_SUCCESS;
-}
-
-/* Launch the Mcron Guile main program.  */
-static void
-inner_main (void *closure, int argc, char *argv[])
-{
-  scm_set_current_module (scm_c_resolve_module ("mcron scripts crontab"));
-  scm_call_0 (scm_variable_ref (scm_c_lookup ("main")));
-}

src/crontab.in

@@ -0,0 +1,45 @@
+#!%GUILE% --no-auto-compile
+-*- scheme -*-
+!#
+
+;;;; crontab -- run jobs at scheduled times
+;;; Copyright © 2003, 2020  Dale Mellor <mcron-lsfnyl@rdmp.org>
+;;; Copyright © 2015, 2016, 2018  Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(unless (getenv "MCRON_UNINSTALLED")
+  (set! %load-path (cons "%modsrcdir%" %load-path))
+  (set! %load-compiled-path (cons "%modbuilddir%" %load-compiled-path)))
+
+(use-modules (mcron scripts crontab)
+             (ice-9 command-line-processor))
+
+(process-command-line  (command-line)
+   application "crontab"
+   version     "%VERSION%"
+   usage       "[-u user] { -e | -l | -r }"
+   help-preamble "the default operation is to replace, per 1003.2"
+   option (--user=  -u  "the user whose files are to be manipulated")
+   option (--edit   -e  "edit this userʼs crontab")
+   option (--list   -l  "list this userʼs crontab")
+   option (--remove -r  "delete the userʼs crontab")
+   bug-address "%PACKAGE_BUGREPORT%"
+   copyright   "2003, 2016, 2020  Free Software Foundation, Inc."
+   license     GPLv3)
+
+((@ (mcron scripts crontab) main) --user --edit --list --remove --!)

src/mcron.c

@@ -1,125 +0,0 @@
-/* mcron.c -- run jobs at scheduled times
-   Copyright © 2003, 2014 Dale Mellor <dale_mellor@users.sourceforge.net>
-   Copyright © 2015, 2016, 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "utils.h"
-#include <argp.h>
-#include <string.h>
-
-/* Forward declarations.  */
-static void inner_main (void *closure, int argc, char *argv[]);
-static SCM parse_args (int argc, char *argv[]);
-static error_t parse_opt (int key, char *arg, struct argp_state *state);
-
-int
-main (int argc, char *argv[])
-{
-  /* Set Guile load paths to ensure that Mcron modules will be found after
-     installation.  In a build environment let the 'pre-inst-env' script set
-     the correct paths.  */
-  if (getenv ("MCRON_UNINSTALLED") == NULL)
-    {
-      wrap_env_path ("GUILE_LOAD_PATH", PACKAGE_LOAD_PATH);
-      wrap_env_path ("GUILE_LOAD_COMPILED_PATH", PACKAGE_LOAD_COMPILED_PATH);
-    }
-
-  scm_boot_guile (argc, argv, inner_main, NULL);
-
-  return EXIT_SUCCESS;
-}
-
-/* Launch the Mcron Guile main program.  */
-static void
-inner_main (void *closure, int argc, char *argv[])
-{
-  SCM config = parse_args (argc, argv);
-  scm_set_current_module (scm_c_resolve_module ("mcron scripts mcron"));
-  scm_call_1 (scm_variable_ref (scm_c_lookup ("main")), config);
-}
-
-/* Handle command line arguments.  */
-static SCM
-parse_args (int argc, char *argv[])
-{
-  static struct argp_option options[] = {
-    {"schedule", 's', "N", 0,
-     "Display the next N jobs that will be run"},
-    {"daemon", 'd', 0, 0,
-     "Run as a daemon process"},
-    {"stdin", 'i', "FORMAT", 0,
-     "Format of data passed as standard input or file arguments (default guile)"},
-    {0, 0, 0, 0, 0}
-  };
-
-  static struct argp argp = {
-    .options = options,
-    .parser = parse_opt,
-    .args_doc = "[FILE...]",
-    .doc = "Run an mcron process according to the specifications in the "
-    "FILE... (`-' for standard input), or use all the files in "
-    "~/.config/cron (or the deprecated ~/.cron) with .guile or "
-    ".vixie extensions."
-  };
-
-  SCM config = SCM_EOL;
-  argp_program_version = PACKAGE_STRING;
-  argp_program_bug_address = PACKAGE_BUGREPORT;
-  argp_parse (&argp, argc, argv, 0, NULL, &config);
-
-  return config;
-}
-
-static error_t
-parse_opt (int key, char *arg, struct argp_state *state)
-{
-  SCM *config = state->input;
-
-  switch (key)
-    {
-    case 's':
-      assq_symbol_set_x (config, "schedule",
-                         scm_from_int (atoi (arg)));
-      break;
-    case 'd':
-      assq_symbol_set_x (config, "daemon", SCM_BOOL_T);
-      break;
-    case 'i':
-      if (strncmp (arg, "vixie", 6) == 0)
-        assq_symbol_set_x (config, "vixie", SCM_BOOL_T);
-      break;
-    case ARGP_KEY_NO_ARGS:
-      assq_symbol_set_x (config, "files", SCM_EOL);
-      break;
-    case ARGP_KEY_ARGS:
-      {
-        SCM lst = SCM_EOL;
-        int filec = state->argc - state->next;
-        char **filev = state->argv + state->next;
-
-        for (int i = filec - 1; i >= 0; i--)
-          lst = scm_cons (scm_from_locale_string (filev[i]), lst);
-
-        assq_symbol_set_x (config, "files", lst);
-        break;
-      }
-    case ARGP_KEY_ARG:
-    default:
-      return ARGP_ERR_UNKNOWN;
-    }
-  return 0;
-}

src/mcron.in

@@ -0,0 +1,56 @@
+#!%GUILE% --no-auto-compile
+-*- scheme -*-
+!#
+
+;;;; mcron -- run jobs at scheduled times
+;;; Copyright © 2003, 2012, 2020  Dale Mellor <mcron-lsfnyl@rdmp.org>
+;;; Copyright © 2015, 2016, 2018  Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(unless (getenv "MCRON_UNINSTALLED")
+  (set! %load-path (cons "%modsrcdir%" %load-path))
+  (set! %load-compiled-path (cons "%modbuilddir%" %load-compiled-path)))
+
+(use-modules  (mcron scripts mcron)
+              (ice-9 command-line-processor))
+
+(process-command-line  (command-line)
+       application   "mcron"
+       version       "%VERSION%"
+       usage         "[OPTIONS ...] [FILES ...]"
+       help-preamble
+  "Run unattended jobs according to instructions in the FILES... "
+  "(`-' for standard input), or use all the files in ~/.config/cron "
+  "(or the deprecated ~/.cron) with .guile or .vixie extensions.\n"
+  "Note that --daemon and --schedule are mutually exclusive."
+       option  (--daemon  -d  "run as a daemon process")
+       option  (--schedule=8  -s  string->number
+                      "display the next N (or 8) jobs that will be run,"
+                      "and then exit")
+       option  (--stdin=guile  short-i  (λ (in) (or (string=? in "guile")
+                                                    (string=? in "vixie")))
+                      "format of data passed as standard input or file "
+                      "arguments, 'guile' or 'vixie' (default guile)")
+       help-postamble
+  "Mandatory or optional arguments to long options are also mandatory or "
+  "optional for any corresponding short options."
+       bug-address "%PACKAGE_BUGREPORT%"
+       copyright   "2003, 2006, 2014, 2020  Free Software Foundation, Inc."
+       license     GPLv3)
+
+(main --daemon --schedule --stdin --!)

src/mcron/base.scm

@@ -139,7 +139,7 @@ entries that are to run at this time.  When SCHEDULE is empty next time is
 (define* (display-schedule count #:optional (port (current-output-port))
                            #:key (schedule %global-schedule))
   "Display on PORT a textual list of the next COUNT jobs to run.  This
-simulates the run of the job loop to display the resquested information.
+simulates the run of the job loop to display the requested information.
 Since calling this procedure has the effect of mutating the job timings, the
 program must exit after.  Otherwise the internal data state will be left
 unusable."

src/mcron/job-specifier.scm

@@ -202,14 +202,14 @@ go into the list.  For example, (range 1 6 2) returns '(1 3 5)."
 ;; The job function, available to configuration files for adding a job rule to
 ;; the system.
 ;;
-;; Here we must 'normalize' the next-time-function so that it is always a lambda
-;; function which takes one argument (the last time the job ran) and returns a
-;; single value (the next time the job should run). If the input value is a
-;; string this is parsed as a Vixie-style time specification, and if it is a
-;; list then we arrange to eval it (but note that such lists are expected to
-;; ignore the function parameter - the last run time is always read from the
-;; %CURRENT-ACTION-TIME parameter object). A similar normalization is applied to
-;; the action.
+;; Here we must 'normalize' the next-time-function so that it is always a
+;; lambda function which takes one argument (the last time the job ran) and
+;; returns a single value (the next time the job should run). If the input
+;; value is a string this is parsed as a Vixie-style time specification, and
+;; if it is a list then we arrange to eval it (but note that such lists are
+;; expected to ignore the function parameter - the last run time is always
+;; read from the %CURRENT-ACTION-TIME parameter object). A similar
+;; normalization is applied to the action.
 ;;
 ;; Here we also compute the first time that the job is supposed to run, by
 ;; finding the next legitimate time from the current configuration time (set
@@ -229,7 +229,8 @@ go into the list.  For example, (range 1 6 2) returns '(1 3 5)."
          (cond ((procedure? time-proc) time-proc)
                ((string? time-proc)    (parse-vixie-time time-proc))
                ((list? time-proc)      (lambda (current-time)
-                                         (primitive-eval time-proc)))
+                                         (eval time-proc
+                               (resolve-module '(mcron job-specifier)))))
                (else
                 (throw 'mcron-error 3
                        "job: invalid first argument (next-time-function; "

src/mcron/redirect.scm

@@ -1,5 +1,6 @@
 ;;;; redirect.scm -- modify job outputs
 ;;; Copyright © 2003 Dale Mellor <dale_mellor@users.sourceforge.net>
+;;; Copyright © 2020 Mathieu Lirzin <mthl@gnu.org>
 ;;; Copyright © 2018 宋文武 <iyzsong@member.fsf.org>
 ;;;
 ;;; This file is part of GNU Mcron.
@@ -63,7 +64,10 @@
 ;; the string, and output (including the error output) being sent to a pipe
 ;; opened on a mail transport.
 
-(define (with-mail-out action . user)
+(define* (with-mail-out action #:optional user #:key
+                        (hostname (gethostname))
+                        (out (lambda ()
+                               (open-output-pipe config-sendmail))))
 
   ;; Determine the name of the user who is to recieve the mail, looking for a
   ;; name in the optional user argument, then in the MAILTO environment
@@ -72,7 +76,7 @@
 
   (let* ((mailto (getenv "MAILTO"))
          (user (cond (mailto mailto)
-                     ((not (null? user)) (car user))
+                     (user user)
                      (else (getenv "LOGNAME"))))
          (parent->child (pipe))
          (child->parent (pipe))
@@ -173,11 +177,11 @@
                                        (open-output-file "/dev/null")
                                        ;; The sendmail command should read
                                        ;; recipients from the message header.
-                                       (open-output-pipe config-sendmail)))
+                                       (out)))
           (set-current-input-port (car child->parent))
           (display "To: ") (display user) (newline)
           (display "From: mcron") (newline)
-          (display (string-append "Subject: " user "@" (gethostname)))
+          (display (string-append "Subject: " user "@" hostname))
           (newline)
           (newline)
 

src/mcron/scripts/cron.scm

@@ -17,8 +17,8 @@
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.
 
+
 (define-module (mcron scripts cron)
-  #:use-module (ice-9 getopt-long)
   #:use-module (ice-9 ftw)
   #:use-module (mcron base)
   #:use-module (mcron config)
@@ -28,25 +28,7 @@
   #:use-module (srfi srfi-2)
   #:export (main))
 
-(define (show-help)
-  (display "Usage: cron [OPTIONS]
-Unless an option is specified, run a cron daemon as a detached process,
-reading all the information in the users' crontabs and in /etc/crontab.
 
-  -v, --version             Display version
-  -h, --help                Display this help message
-  -sN, --schedule[=]N       Display the next N jobs that will be run by cron
-  -n, --noetc               Do not check /etc/crontab for updates (HIGHLY
-                              RECOMMENDED).")
-  (newline)
-  (show-package-information))
-
-(define %options
-  `((schedule (single-char #\s) (value #t)
-              (predicate ,(λ (str) (string->number str))))
-    (noetc    (single-char #\n) (value #f))
-    (version  (single-char #\v) (value #f))
-    (help     (single-char #\h) (value #f))))
 
 (define (delete-run-file)
   "Remove the /var/run/cron.pid file so that crontab and other invocations of
@@ -60,6 +42,8 @@ received."
     noop)
   (quit))
 
+
+
 (define (cron-file-descriptors)
   "Establish a socket to listen for updates from a crontab program, and return
 a list containing the file descriptors correponding to the files read by
@@ -74,6 +58,8 @@ crontab.  This requires that command-type is 'cron."
       (delete-file config-pid-file)
       (mcron-error 1 "Cannot bind to UNIX socket " config-socket-file))))
 
+
+
 (define (process-files-in-system-directory)
   "Process all the files in the crontab directory.  When the job procedure is
 run on behalf of the configuration files, the jobs are registered on the
@@ -97,15 +83,9 @@ operation.  The permissions on the /var/cron/tabs directory enforce this."
       (mcron-error 4
         "You do not have permission to access the system crontabs."))))
 
-(define (%process-files schedule? noetc?)
-  ;; XXX: What is this supposed to do?
-  (when schedule?
-    (with-output-to-file config-pid-file noop))
+(define (%process-files noetc?)
   ;; Clear MAILTO so that outputs are sent to the various users.
   (setenv "MAILTO" #f)
-  ;; XXX: At compile time, this yields a "possibly unbound variable" warning,
-  ;; but this is OK since it is bound in the C wrapper.
-  (c-set-cron-signals)
   ;; Having defined all the necessary procedures for scanning various sets of
   ;; files, we perform the actual configuration of the program depending on
   ;; the personality we are running as. If it is mcron, we either scan the
@@ -134,46 +114,49 @@ option.\n")
 ;;; Entry point.
 ;;;
 
-(define* (main #:optional (args (command-line)))
-  (let ((opts (getopt-long args %options)))
-    (when config-debug
-      (debug-enable 'backtrace))
-    (cond
-     ((option-ref opts 'help #f)
-      (show-help)
-      (exit 0))
-     ((option-ref opts 'version #f)
-      (show-version "cron")
-      (exit 0))
-     ((not (zero? (getuid)))
-      (mcron-error 16
-        "This program must be run by the root user (and should"
-        " have been installed as such)."))
-     ((access? config-pid-file F_OK)
-      (mcron-error 1
-        "A cron daemon is already running.\n  (If you are sure"
-        " this is not true, remove the file\n   "
-        config-pid-file ".)"))
-     (else
-      (%process-files (option-ref opts 'schedule #f)
-                      (option-ref opts 'noetc #f))
-      (cond ((option-ref opts 'schedule #f) ;display jobs schedule
-             => (λ (count)
-                  (display-schedule (max 1 (string->number count)))
-                  (exit 0)))
-            (else (case (primitive-fork) ;run the daemon
-                    ((0)
-                     (setsid)
-                     ;; we can now write the PID file.
-                     (with-output-to-file config-pid-file
-                       (λ () (display (getpid)) (newline))))
-                    (else (exit 0)))))
-      ;; Forever execute the 'run-job-loop', and when it drops out (can
-      ;; only be because a message has come in on the socket) we
-      ;; process the socket request before restarting the loop again.
-      (catch-mcron-error
-       (let ((fdes-list (cron-file-descriptors)))
-         (while #t
-           (run-job-loop fdes-list)
-           (unless (null? fdes-list)
-             (process-update-request fdes-list)))))))))
+(define (main --schedule --noetc)
+    (when  config-debug  (debug-enable 'backtrace))
+
+    (cond  ((not (zero? (getuid)))
+               (mcron-error 16
+                   "This program must be run by the root user (and should"
+                   " have been installed as such)."))
+           ((access? config-pid-file F_OK)
+               (mcron-error 1
+                   "A cron daemon is already running.\n  (If you are sure"
+                   " this is not true, remove the file\n   "
+                   config-pid-file ".)"))
+           (else
+               (cond (--schedule
+                      => (λ (count)
+                           (display-schedule (max 1 (string->number count)))
+                           (exit 0))))
+               (%process-files --noetc)))
+
+  ;; Daemonize ourself.
+  (unless  (eq? 0 (primitive-fork))  (exit 0))
+  (setsid)
+
+  ;; Set up process signal handlers, as signals are the only way to terminate
+  ;; the daemon and we MUST be graceful in defeat.
+  (for-each   (λ (x)  (sigaction  x
+                          (λ (sig)  (catch #t
+                                           (λ ()
+                                             (delete-file config-pid-file)
+                                             (delete-file config-socket-file))
+                                           noop)
+                             (exit EXIT_FAILURE))))
+                '(SIGTERM SIGINT SIGQUIT SIGHUP))
+
+  ;; We can now write the PID file.
+  (with-output-to-file  config-pid-file
+                        (λ () (display (getpid)) (newline)))
+
+  ;; Forever execute the 'run-job-loop', and when it drops out (can
+  ;; only be because a message has come in on the socket) we
+  ;; process the socket request before restarting the loop again.
+  (catch-mcron-error
+   (let ((fdes-list (cron-file-descriptors)))
+     (while #t
+       (run-job-loop fdes-list)
+       (unless (null? fdes-list) (process-update-request fdes-list))))))

src/mcron/scripts/crontab.scm

@@ -1,5 +1,5 @@
 ;;;; crontab -- edit user's cron tabs
-;;; Copyright © 2003, 2004 Dale Mellor <dale_mellor@users.sourceforge.net>
+;;; Copyright © 2003, 2004 Dale Mellor <>
 ;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
 ;;;
 ;;; This file is part of GNU Mcron.
@@ -18,31 +18,12 @@
 ;;; along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (mcron scripts crontab)
-  #:use-module (ice-9 getopt-long)
   #:use-module (ice-9 rdelim)
   #:use-module (mcron config)
   #:use-module (mcron utils)
   #:use-module (mcron vixie-specification)
   #:export (main))
 
-(define* (show-help)
-  (display "Usage: crontab [-u user] file
-       crontab [-u user] { -e | -l | -r }
-               (default operation is replace, per 1003.2)
-       -e      (edit user's crontab)
-       -l      (list user's crontab)
-       -r      (delete user's crontab")
-  (newline)
-  (show-package-information))
-
-(define %options
-  '((user     (single-char #\u) (value #t))
-    (edit     (single-char #\e) (value #f))
-    (list     (single-char #\l) (value #f))
-    (remove   (single-char #\r) (value #f))
-    (version  (single-char #\v) (value #f))
-    (help     (single-char #\h) (value #f))))
-
 (define (hit-server user-name)
   "Tell the running cron daemon that the user corresponding to
 USER-NAME has modified his crontab.  USER-NAME is written to the
@@ -56,6 +37,25 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
     (lambda (key . args)
       (display "Warning: a cron daemon is not running.\n"))))
 
+
+
+;; Display the prompt and wait for user to type his choice. Return #t if the
+;; answer begins with 'y' or 'Y', return #f if it begins with 'n' or 'N',
+;; otherwise ask again.
+(define  (get-yes-no prompt . re-prompt)
+  (unless (null? re-prompt)
+      (display "Please answer y or n.\n"))
+  (display (string-append prompt " "))
+  (let ((r (read-line)))
+    (if (not (string-null? r))
+        (case (string-ref r 0)
+              ((#\y #\Y) #t)
+              ((#\n #\N) #f)
+              (else (get-yes-no prompt #t)))
+      (get-yes-no prompt #t))))
+
+
+
 (define (in-access-file? file name)
   "Scan FILE which should contain one user name per line (such as
 '/var/cron/allow' and '/var/cron/deny').  Return #t if NAME is in there, and
@@ -78,60 +78,34 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
 ;;; Entry point.
 ;;;
 
-(define* (main #:optional (args (command-line)))
-  (let ((opts (getopt-long args %options)))
-    (when config-debug
-      (debug-enable 'backtrace))
-    (cond ((option-ref opts 'help #f)
-           (show-help)
-           (exit 0))
-          ((option-ref opts 'version #f)
-           (show-version "crontab")
-           (exit 0)))
-    (let ((crontab-real-user
-           ;; This program should have been installed SUID root. Here we get
-           ;; the passwd entry for the real user who is running this program.
-           (passwd:name (getpw (getuid)))))
+(define (main --user --edit --list --remove files)
+  (when config-debug  (debug-enable 'backtrace))
+  (let ((crontab-real-user
+         ;; This program should have been installed SUID root. Here we get
+         ;; the passwd entry for the real user who is running this program.
+         (passwd:name (getpw (getuid)))))
 
-      ;; If the real user is not allowed to use crontab due to the
-      ;; /var/cron/allow and/or /var/cron/deny files, bomb out now.
-      (if (or (eq? (in-access-file? config-allow-file crontab-real-user) #f)
-              (eq? (in-access-file? config-deny-file crontab-real-user) #t))
-          (mcron-error 6 "Access denied by system operator."))
+    ;; If the real user is not allowed to use crontab due to the
+    ;; /var/cron/allow and/or /var/cron/deny files, bomb out now.
+    (if (or (eq? (in-access-file? config-allow-file crontab-real-user) #f)
+            (eq? (in-access-file? config-deny-file crontab-real-user) #t))
+        (mcron-error 6 "Access denied by system operator."))
 
-      ;; Check that no more than one of the mutually exclusive options are
-      ;; being used.
-      (when (> (+ (if (option-ref opts 'edit #f) 1 0)
-                  (if (option-ref opts 'list #f) 1 0)
-                  (if (option-ref opts 'remove #f) 1 0))
-               1)
+    ;; Check that no more than one of the mutually exclusive options are
+    ;; being used.
+      (when (<  1  (+ (if --edit 1 0) (if --list 1 0) (if --remove 1 0)))
         (mcron-error 7 "Only one of options -e, -l or -r can be used."))
 
       ;; Check that a non-root user is trying to read someone else's files.
-      (when (and (not (zero? (getuid)))
-                 (option-ref opts 'user #f))
+      (when (and (not (zero? (getuid))) --user)
         (mcron-error 8 "Only root can use the -u option."))
 
       (letrec* (;; Iff the --user option is given, the crontab-user may be
                 ;; different from the real user.
-                (crontab-user (option-ref opts 'user crontab-real-user))
+                (crontab-user (or --user crontab-real-user))
                 ;; So now we know which crontab file we will be manipulating.
-                (crontab-file (string-append config-spool-dir "/" crontab-user))
-                ;; Display the prompt and wait for user to type his
-                ;; choice. Return #t if the answer begins with 'y' or 'Y',
-                ;; return #f if it begins with 'n' or 'N', otherwise ask
-                ;; again.
-                (get-yes-no (λ (prompt . re-prompt)
-                              (if (not (null? re-prompt))
-                                  (display "Please answer y or n.\n"))
-                              (display (string-append prompt " "))
-                              (let ((r (read-line)))
-                                (if (not (string-null? r))
-                                    (case (string-ref r 0)
-                                      ((#\y #\Y) #t)
-                                      ((#\n #\N) #f)
-                                      (else (get-yes-no prompt #t)))
-                                    (get-yes-no prompt #t))))))
+                (crontab-file
+                         (string-append config-spool-dir "/" crontab-user)))
         ;; There are four possible sub-personalities to the crontab
         ;; personality: list, remove, edit and replace (when the user uses no
         ;; options but supplies file names on the command line).
@@ -140,7 +114,7 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
          ;; character-by-character to the standard output. If anything goes
          ;; wrong, it can only mean that this user does not have a crontab
          ;; file.
-         ((option-ref opts 'list #f)
+         (--list
           (catch #t
             (λ ()
               (with-input-from-file crontab-file
@@ -163,7 +137,7 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
          ;; cron daemon up, and remove the temporary file. If the parse fails,
          ;; we give user a choice of editing the file again or quitting the
          ;; program and losing all changes made.
-         ((option-ref opts 'edit #f)
+         (--edit
           (let ((temp-file (string-append config-tmp-dir
                                           "/crontab."
                                           (number->string (getpid)))))
@@ -191,12 +165,9 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
 
          ;; In the remove personality we simply make an effort to delete the
          ;; crontab and wake the daemon. No worries if this fails.
-         ((option-ref opts 'remove #f)
-          (catch #t
-            (λ ()
-              (delete-file crontab-file)
-              (hit-server crontab-user))
-            noop))
+         (--remove (catch #t (λ ()  (delete-file crontab-file)
+                                    (hit-server crontab-user))
+                          noop))
 
          ;; XXX: This comment is wrong.
          ;; In the case of the replace personality we loop over all the
@@ -206,8 +177,8 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
          ;; location; we deal with the standard input in the same way but
          ;; different. :-) In either case the server is woken so that it will
          ;; read the newly installed crontab.
-         ((not (null? (option-ref opts '() '())))
-          (let ((input-file (car (option-ref opts '() '()))))
+         ((not (null? files))
+          (let ((input-file (car files)))
             (catch-mcron-error
              (if (string=? input-file "-")
                  (let ((input-string (read-string)))
@@ -222,4 +193,4 @@ USER-NAME has modified his crontab.  USER-NAME is written to the
          ;; The user is being silly. The message here is identical to the one
          ;; Vixie cron used to put out, for total compatibility.
          (else (mcron-error 15
-                 "usage error: file name must be specified for replace.")))))))
+                 "usage error: file name must be specified for replace."))))))

src/mcron/scripts/mcron.scm

@@ -1,6 +1,6 @@
 ;;;; mcron -- run jobs at scheduled times
-;;; Copyright © 2003, 2012 Dale Mellor <dale_mellor@users.sourceforge.net>
-;;; Copyright © 2015, 2016, 2018 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2003, 2012, 2020  Dale Mellor <>
+;;; Copyright © 2015, 2016, 2018  Mathieu Lirzin <mthl@gnu.org>
 ;;;
 ;;; This file is part of GNU Mcron.
 ;;;
@@ -19,13 +19,17 @@
 
 (define-module (mcron scripts mcron)
   #:use-module (ice-9 ftw)
+  #:use-module (ice-9 local-eval)
+  #:use-module (ice-9 rdelim)
   #:use-module (mcron base)
   #:use-module (mcron config)
-  #:use-module (mcron job-specifier)    ;for user/system files
+  #:use-module (mcron job-specifier)    ; For user/system files.
   #:use-module (mcron utils)
   #:use-module (mcron vixie-specification)
   #:export (main))
 
+
+
 (define process-user-file
   (let ((guile-regexp (make-regexp "\\.gui(le)?$"))
         (vixie-regexp (make-regexp "\\.vix(ie)?$")))
@@ -34,13 +38,17 @@
 force guile syntax usage.  If FILE-NAME format is not recognized, it is
 silently ignored."
       (cond ((string=? "-" file-name)
-             (if (string=? input "vixie")
-                 (read-vixie-port (current-input-port))
-                 (eval-string (read-string))))
+                  (if (string=? input "vixie")
+                      (read-vixie-port (current-input-port))
+                      (eval-string (read-string)
+                                   (resolve-module '(mcron job-specifier)))))
             ((or guile-syntax? (regexp-exec guile-regexp file-name))
-             (load file-name))
+                  (eval-string (read-delimited "" (open-input-file file-name))
+                               (resolve-module '(mcron job-specifier))))
             ((regexp-exec vixie-regexp file-name)
-             (read-vixie-file file-name))))))
+                  (read-vixie-file file-name))))))
+
+
 
 (define (process-files-in-user-directory input-type)
   "Process files in $XDG_CONFIG_HOME/cron and/or ~/.cron directories (if
@@ -64,6 +72,8 @@ $XDG_CONFIG_HOME is not defined uses ~/.config/cron instead)."
       (mcron-error 13
         "Cannot read files in your ~/.config/cron (or ~/.cron) directory."))))
 
+
+
 (define (%process-files files input-type)
   (if (null? files)
       (process-files-in-user-directory input-type)
@@ -74,30 +84,26 @@ $XDG_CONFIG_HOME is not defined uses ~/.config/cron instead)."
 ;;; Entry point.
 ;;;
 
-(define* (main #:optional (opts '()))
-  (when config-debug
-    (debug-enable 'backtrace))
+(define (main --daemon --schedule --stdin file-list)
 
-  (%process-files (or (assq-ref opts 'files) '())
-                  (if (assq-ref opts 'vixie) "vixie" "guile"))
+    (when  config-debug  (debug-enable 'backtrace))
+    (%process-files   file-list   (or --stdin "guile"))
+    (cond (--schedule
+               => (λ (count)
+                     (display-schedule
+                        (max 1 (inexact->exact (floor (string->number count)))))
+                     (exit 0)))
+          (--daemon   (case (primitive-fork)  ((0)  (setsid))
+                                              (else (exit 0)))))
 
-  (cond ((assq-ref opts 'schedule) ;display jobs schedule
-         => (λ (count)
-              (display-schedule (max 1 count))
-              (exit 0)))
-        ((assq-ref opts 'daemon) ;run mcron as a daemon
-         (case (primitive-fork)
-           ((0)  (setsid))
-           (else (exit 0)))))
-
-  ;; Forever execute the 'run-job-loop', and when it drops out (can
-  ;; only be because a message has come in on the socket) we process
-  ;; the socket request before restarting the loop again.
-  (catch-mcron-error
-   (let ((fdes-list '()))
-     (while #t
-       (run-job-loop fdes-list)
-       ;; we can also drop out of run-job-loop because of a SIGCHLD,
-       ;; so must test FDES-LIST.
-       (unless (null? fdes-list)
-         (process-update-request fdes-list))))))
+    ;; Forever execute the 'run-job-loop', and when it drops out (can only be
+    ;; because a message has come in on the socket) we process the socket
+    ;; request before restarting the loop again.
+    (catch-mcron-error
+     (let ((fdes-list '()))
+       (while #t
+         (run-job-loop fdes-list)
+         ;; we can also drop out of run-job-loop because of a SIGCHLD,
+         ;; so must test FDES-LIST.
+         (unless (null? fdes-list)
+           (process-update-request fdes-list))))))

src/mcron/vixie-time.scm

@@ -1,6 +1,6 @@
 ;;;; vixie-time.scm -- parse Vixie-style times
 ;;; Copyright © 2003 Dale Mellor <dale_mellor@users.sourceforge.net>
-;;; Copyright © 2018 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2018, 2020 Mathieu Lirzin <mthl@gnu.org>
 ;;;
 ;;; This file is part of GNU Mcron.
 ;;;
@@ -360,7 +360,7 @@ accounted for."
                                    (time-spec:list wday)
                                    (tm:mon time)
                                    (tm:year time)))))
-             (nudge-day! (pk time) (pk (cddr time-spec-list)))
+             (nudge-day! time (cddr time-spec-list))
              (set-tm:hour time -1))
            (unless (member (tm:hour time)
                            (time-spec:list hour))

src/utils.c

@@ -1,48 +0,0 @@
-/* utils.c -- Utility functions.
-   Copyright © 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "utils.h"
-#include <stdbool.h>
-#include <stdio.h>
-
-void
-wrap_env_path (const char *envar, const char *dir)
-{
-  const char *path = getenv (envar);
-  if (path == NULL)
-    setenv (envar, dir, true);
-  else
-    {
-      char *new_path;
-      int ret = asprintf (&new_path, "%s:%s", dir, path);
-      if (ret >= 0)
-        setenv (envar, new_path, true);
-      else
-        {
-          perror (envar);
-          exit (EXIT_FAILURE);
-        }
-      free (new_path);
-    }
-}
-
-void
-assq_symbol_set_x (SCM *alst, const char *symbol, SCM val)
-{
-  *alst = scm_assq_set_x (*alst, scm_from_utf8_symbol (symbol), val);
-}

src/utils.h

@@ -1,33 +0,0 @@
-/* utils.h -- Utility functions.
-   Copyright © 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef MCRON_UTILS_H
-#define MCRON_UTILS_H
-
-#include <libguile.h>
-
-/**
-   Append DIR in front of ENVAR environment variable value.  If ENVAR is not
-   defined, then define it with DIR.  Bail out if something went wrong.  */
-extern void wrap_env_path (const char *envar, const char *dir);
-
-/**
-   In the association list pointed by ALST, set SYMBOL to VAL.  */
-extern void assq_symbol_set_x (SCM *alst, const char *symbol, SCM val);
-
-#endif /* MCRON_UTILS_H */

tests/basic.sh

@@ -27,6 +27,9 @@ cat > cron/foo.guile <<EOF
 (job '(next-second) '(display "foo\n"))
 EOF
 
+mcron --schedule=1 cron/foo.guile > "output$$"
+grep -e "foo" "output$$" || fail_ "'foo.guile' job is not scheduled"
+
 mcron --schedule=1 > "output$$"
 grep -e "foo" "output$$" || fail_ "'foo.guile' job is not scheduled"
 

tests/job-specifier.scm

@@ -56,36 +56,32 @@
 
 ;;; TODO: Find more meaningful date examples.
 
+(setenv "TZ" ":UTC")
+
 (test-equal "next-year"
-  (list 59989762800 1546293600)
-  (list (next-year '(1971))
+  (list 1893456000 1546300800)
+  (list (next-year '(130))   ;; This is the year 2030.
         (next-year-from 1522095469)))
 
 (test-equal "next-month"
-  (list 28854000 5094000)
-  (list (next-month '(11))
-        (next-month-from 101 '(0 2 4))))
+  5097600
+  (next-month-from 101 '(0 2 4)))
 
 (test-equal "next-day"
-  (list 2588400 342000)
-  (list (next-day '(31))
-        (next-day-from 4337 '(0 5 10))))
+  345600
+  (next-day-from 4337 '(0 5 10)))
 
 (test-equal "next-hour"
-  '(3600 82800 3600)
-  (list (next-hour)
-        (next-hour '(0))
-        (next-hour-from 3 '(0 1 2 3 4))))
+  3600
+  (next-hour-from 3 '(0 1 2 3 4)))
 
 (test-equal "next-minute"
-  '(240 60)
-  (list (next-minute '(4 9))
-        (next-minute-from 8)))
+  60
+  (next-minute-from 8))
 
 (test-equal "next-second"
-  '(52 15)
-  (list (next-second '(52 55))
-        (next-second-from 14)))
+  15
+  (next-second-from 14))
 
 ;;;
 ;;; Check 'configuration-user' manipulation

tests/redirect.scm

@@ -0,0 +1,53 @@
+;;;; redirect.scm -- tests for (mcron redirect) module
+;;; Copyright © 2020 Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+(use-modules (ice-9 textual-ports)
+             (srfi srfi-1)
+             (srfi srfi-64)
+             (mcron redirect))
+
+(setenv "TZ" "UTC0")
+
+(test-begin "redirect")
+
+(define out (mkstemp! (string-copy "foo-XXXXXX")))
+
+(dynamic-wind
+  (const #t)
+  (lambda ()
+    (with-mail-out "echo 'foo'" "user0"
+                   #:out (lambda () out)
+                   #:hostname "localhost")
+
+    (flush-all-ports)
+
+    (test-equal "mail output"
+      "To: user0
+From: mcron
+Subject: user0@localhost
+
+foo
+"
+      (call-with-input-file (port-filename out) get-string-all)))
+
+  (lambda ()
+    (let ((fname (port-filename out)))
+      (close out)
+      (delete-file fname))))
+
+(test-end)

tests/schedule-2.sh

@@ -0,0 +1,81 @@
+# schedule-2.sh -- Check mcron schedule output
+# Copyright © 2020  Dale Mellor <mcron-lsfnyl@rdmp.org>
+#
+# This file is part of GNU Mcron.
+#
+# GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+source "${srcdir}/tests/init.sh"
+
+# Use UTC and SOURCE_DATE_EPOCH to get reproducible result.
+
+SOURCE_DATE_EPOCH=1
+export SOURCE_DATE_EPOCH
+
+TZ=UTC0
+export TZ
+
+# Use current working directory to store mcron files
+XDG_CONFIG_HOME=`pwd`
+export XDG_CONFIG_HOME
+
+LC_ALL=C
+export LC_ALL
+
+mkdir cron
+cat > cron/foo.guile <<EOF
+(job '(next-second) '(display "foo\n"))
+EOF
+
+cat > expected <<EOF
+Thu Jan  1 00:00:01 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:02 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:03 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:04 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:05 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:06 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:07 1970 +0000
+(display foo
+)
+
+Thu Jan  1 00:00:08 1970 +0000
+(display foo
+)
+
+EOF
+
+mcron -s cron/foo.guile > output
+diff expected output \
+    || skip_ 'The -s option is not fully functional; 
+this will be fixed with a future version of GNU Guile.'
+
+Exit 0

tests/schedule.sh

@@ -26,6 +26,9 @@ export SOURCE_DATE_EPOCH
 TZ=UTC0
 export TZ
 
+LC_ALL=C
+export LC_ALL
+
 # Use current working directory to store mcron files
 XDG_CONFIG_HOME=`pwd`
 export XDG_CONFIG_HOME

tests/vixie-specification.scm

@@ -0,0 +1,144 @@
+;;;; vixie-specification.scm -- tests for (mcron vixie-specificaion) module
+;;; Copyright © 2020 Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-1)
+             (srfi srfi-64)
+             (mcron vixie-specification))
+
+(setenv "TZ" "UTC0")
+
+;;; Do not send mail
+(setenv "MAILTO" "")
+
+(define (create-file! content)
+  "Construct a temporary file port containing CONTENT which must be a string."
+  (let ((port (mkstemp! (string-copy "file-XXXXXX"))))
+    (display content port)
+    (force-output port)
+    port))
+
+(define (clean-temp port)
+  "Close and Delete a temporary file port"
+  (let ((fname (port-filename port)))
+    (close port)
+    (delete-file fname)))
+
+(define schedule (@@ (mcron base) %global-schedule))
+(define schedule-user (@@ (mcron base) schedule-user))
+(define set-schedule-user! (@@ (mcron base) set-schedule-user!))
+(define job:environment (@@ (mcron base) job:environment))
+(define job:displayable (@@ (mcron base) job:displayable))
+(define job:user (@@ (mcron base) job:user))
+
+(test-begin "vixie-specification")
+
+;;; Parse user crontab file
+
+(define user-crontab-example
+  "# Example crontab
+FOO=x
+BAR=y
+
+# Example of job definitions:
+17 *	* * *	cd / && run baz
+47 6	* * 7	foo -x /tmp/example || bar
+")
+
+(define user-crontab (create-file! user-crontab-example))
+
+(dynamic-wind
+  (const #t)
+  (lambda ()
+    (set-schedule-user! schedule '())
+    (read-vixie-file (port-filename user-crontab))
+
+    (test-assert "User schedule has exactly 2 matching jobs"
+      (lset= string=?
+             '("cd / && run baz"
+               "foo -x /tmp/example || bar")
+             (map job:displayable (schedule-user schedule))))
+
+    (test-assert "Job environment matches configuration"
+      (every (lambda (j)
+               (lset= equal?
+                      '(("FOO" . "x") ("BAR" . "y"))
+                      (job:environment j)))
+             (schedule-user schedule))))
+
+  (lambda ()
+    (clean-temp user-crontab)))
+
+;;; Parse system crontab file
+
+;;; Get two existing users from the test environment.
+(setpwent)
+(define user0 (getpwent))
+(define user1 (or (getpwent) user0))
+(define system-crontab-example
+  (string-append
+   "# Example crontab
+BAZ=z
+
+17 *	* * * " (passwd:name user0) " cd / && run baz
+47 6	* * 7 "	(passwd:name user1) "   foo -x /tmp/example || bar"))
+
+(define sys-crontab (create-file! system-crontab-example))
+
+(dynamic-wind
+  (const #t)
+  (lambda ()
+    (set-schedule-user! schedule '())
+    (read-vixie-file (port-filename sys-crontab) parse-system-vixie-line)
+
+    (test-assert "System schedule has exactly 2 matching jobs"
+      (lset= equal?
+             `((,user0 . "cd / && run baz")
+               (,user1 . "foo -x /tmp/example || bar"))
+             (map (lambda (j)
+                    (cons (job:user j) (job:displayable j)))
+                  (schedule-user schedule))))
+
+    (test-assert "Job environment matches configuration"
+    (every (lambda (j)
+             (lset= equal? '(("BAZ" . "z")) (job:environment j)))
+           (schedule-user schedule))))
+
+  (lambda ()
+    (clean-temp sys-crontab)))
+
+;;; Try to parse a user crontab in a system context
+
+(define wrong-system-crontab-example
+  "
+# Example of job definitions:
+17 *	* * *	ls")
+
+(define wrong-sys-crontab (create-file! wrong-system-crontab-example))
+
+(dynamic-wind
+  (const #t)
+  (lambda ()
+    (test-error "missing user"
+      'mcron-error
+      (read-vixie-file (port-filename wrong-sys-crontab)
+                       parse-system-vixie-line)))
+
+  (lambda ()
+    (clean-temp wrong-sys-crontab)))
+
+(test-end)