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60 lines
2.5 KiB
60 lines
2.5 KiB
##
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# \file
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# To each interface a set of caller functions exist, that take an instance
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# of an object and then in turn call the implementation for the class of
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# this object. If there is none within the class it looks into its
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# parent class and so forth.
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#
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# This is somewhat similar to late binding in real OOP languages, but
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# by far not so elaborated. This is not a real object oriented language
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# and will surely never ever provide all features these have.
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#
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# That said it has proven very usefull for me to orgnize code and prevent
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# code duplication.
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#
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# \author Georg Hopp
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#
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# \copyright
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# Copyright © 2014 Georg Hopp
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#
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# This program 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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#
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# This program 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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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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##
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# get and export the locations of used programs and export them
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# I assume that on every UNIX/shell variant at least [ is globally
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# available. I will use it throughout all other scripts without
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# checking for existence.
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# I also assume through all scripts that eval is available.
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#
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[ -z "${WHICH}" ] && WHICH="/usr/bin/which"
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[ -z "${UNAME}" ] && UNAME="$(${WHICH} uname 2>/dev/null)"
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[ -z "${GREP}" ] && GREP="$(${WHICH} grep 2>/dev/null)"
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[ -z "${AWK}" ] && AWK="$(${WHICH} awk 2>/dev/null)"
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[ -z "${SED}" ] && SED="$(${WHICH} sed 2>/dev/null)"
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[ -z "${ECHO}" ] && ECHO="$(${WHICH} echo 2>/dev/null)"
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[ -z "${SORT}" ] && SORT="$(${WHICH} sort 2>/dev/null)"
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[ -z "${TR}" ] && TR="$(${WHICH} tr 2>/dev/null)"
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[ -z "${PRINTF}" ] && PRINTF="$(${WHICH} printf 2>/dev/null)"
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[ -z "${LOGGER}" ] && LOGGER="$(${WHICH} logger 2>/dev/null)"
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[ -z "${NPROC}" ] && NPROC="$(${WHICH} nproc 2>/dev/null)"
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[ -z "${LSCPU}" ] && LSCPU="$(${WHICH} lscpu 2>/dev/null)"
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[ -z "${SYSCTL}" ] && SYSCTL="$(${WHICH} sysctl 2>/dev/null)"
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[ -z "${IP}" ] && IP="$(${WHICH} ip 2>/dev/null)"
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[ -z "${IFCONFIG}" ] && IFCONFIG="$(${WHICH} ifconfig 2>/dev/null)"
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export WHICH UNAME GREP AWK SED ECHO SORT TR PRINTF LOGGER NPROC LSCPU IP IFCONFIG
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# vim: set ts=4 sw=4:
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