ax_prog_crontab.m4

# ===========================================================================
#     https://www.gnu.org/software/autoconf-archive/ax_prog_crontab.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_PROG_CRONTAB
#
# DESCRIPTION
#
#   Check for the program crontab, if exists let script continue, else pops
#   an error message
#
#   Besides checking existence, this macro also set these environment
#   variables upon completion:
#
#     CRONTAB = which crontab
#
# LICENSE
#
#   Copyright (c) 2008 Gleen Salmon <gleensalmon@yahoo.com>
#
#   This program 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 2 of the License, or (at your
#   option) any later version.
#
#   This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
#
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#serial 6

AU_ALIAS([AC_PROG_CRONTAB], [AX_PROG_CRONTAB])
AC_DEFUN([AX_PROG_CRONTAB],[
AC_REQUIRE([AC_EXEEXT])dnl
AC_PATH_PROG(CRONTAB, crontab$EXEEXT, nocommand)
if test "$CRONTAB" = nocommand; then
        AC_MSG_ERROR([crontab (needed for scheduled job) not found in $PATH])
fi;dnl
])