I am working on limited basic set of maths routines for ksh93 that can be sourced as . ./ksh_math.sh
Notice that the Korn shell doesn't need that: There is a variable FPATH, which works quite like PATH, but for functions: You set it to a (list of) directory/ies and every function not yet defined will be searched there. It is possible to build "libraries" that way by collecting functions into a certain directory.
In fact i use this feature heavily in my scripts. Here is my "standard script template":
Code:
#! /bin/ksh
# ------------------------------------------------------------------------------
# script-template template for scripts
# ------------------------------------------------------------------------------
# Author.....:
# last update: 2000 00 00 by:
# ------------------------------------------------------------------------------
# Revision Log:
# - 0.xx 2000 00 00 Original Creation
# - <keyword here>
#
# ------------------------------------------------------------------------------
# Usage:
#
#
# Example:
#
# Prerequisites:
#
# ------------------------------------------------------------------------------
# Documentation:
#
# Parameters:
# returns:
# ------------------------------------------------------------------------------
# known bugs:
#
# none
# ------------------------------------------------------------------------------
# ................................(C) 2000 ... .................................
# ------------------------------------------------------------------------------
if [ -z "$DEVELOP" ] ; then # set environment
. /usr/local/lib/ksh/f_env
else
. ~/lib/f_env
fi
# local variables
typeset chUsageShort="usage: $0 [-(?|h)] | [-V] [-S]"
typeset achUsageLong[0]="$chUsageShort"
typeset achUsageLong[1]=" "
typeset achUsageLong[2]="Where means"
typeset achUsageLong[3]=" -?|h[elp] display this help"
typeset achUsageLong[4]=" -V verbose, fulldebug mode"
typeset achUsageLong[5]=" -S simulation mode, cmds only displayed"
typeset chProgBase="${chProgName##*/}" # ^= basename $0
typeset chOpt=""
while getopts ":hVS" chOpt ; do # process commandline
case "$chOpt" in
h) # display help
f_usage full
;;
"?")
if [ "$chOpt" == "?" -a "$OPTARG" == "?" ] ; then
f_usage full
else
f_die 1 "unknown option -${OPTARG}"
fi
;;
V) # fulldebug mode
export chFullDebug='set -xv'
;;
S) # simulation mode
SIMULATE='print -'
;;
esac
done
<your code here>
# -- EOF template.sh
where f_usage and f_env are functions in this library. Here is f_env:
Code:
# ------------------------------------------------------------------------------
# f_env() set the environment to a defined state
# ------------------------------------------------------------------------------
# Author.....: Wolf Machowitsch
# last update: 2001 08 08 by: Wolf Machowitsch
# ------------------------------------------------------------------------------
# Revision Log:
# - 0.99 1999 01 21 Original Creation
# -
#
# - 1.00 1999 03 12 Production release
# Reviewed version. chFullDebug can now be set via
# the commandline outside the script too. However,
# in this case the value of $chFullDebug is not
# checked for validity.
# -
#
# - 1.01 1999 04 18 Developers switch
# f_env now scans the environment for a variable
# $DEVELOP. If it is non-null, then FPATH is not
# set to "/usr/local/lib/ksh" but to "~/lib".
# This way it is possible to test new developments
# for the library before migrating them to the
# production environment.
#
# - 1.10 1999 05 01 bugfix version: system environment used
# /etc/environment is now parsed in in f_env().
# Not to do this would leave variables like ODMDIR
# unset. Some AIX processes rely on this.
#
# - 1.20 1999 05 10 Log- and Error-file
# support added for error- and logfile as used in
# the f_Cmd*-functions.
#
# - 1.30 2000 03 07 User- and Host-information
# to support the automated mailing facility some
# info about effective UID, hostname, etc. is
# retrieved.
#
#
# - 1.40 2001 05 23 Linux ready
# the 'uname' command is now used to find out the
# OS we're running. Accordingly either /etc/profile
# or /etc/environment is sourced in and a variable
# is set.
#
# - 1.41 2001 08 08 bugfix
# since in Linux '/bin' is not a link to '/usr/bin'
# (like in AIX) '/bin' is now included in the path.
#
# - 1.50 2015 09 24 HMC-List
# added a list of known HMCs to use for f_GetHostList()
#
# ------------------------------------------------------------------------------
# Usage:
# f_env() is to be PARSED into the scripts environment. The following
# piece of code shows how to use it.
#
# Example:
# #!/bin/ksh
# # example script for using f_env()
# . /usr/local/lib/ksh/f_env
# # ---- here goes the rest of your code -----
# exit
#
# Prerequisites:
# ------------------------------------------------------------------------------
# Documentation:
# f_env() is intended to be used at the beginning of scripts to make
# the environment always the same for every script instead of being
# dependant of the environment the developer has set in his shell.
# To use this script it has to be PARSED rather than called as a
# function.
#
# Parameters: void
# returns: void
# ------------------------------------------------------------------------------
# known bugs:
#
# none
# ------------------------------------------------------------------------------
# ......................(C) 99 Wolf Machowitsch ................................
# ------------------------------------------------------------------------------
if [ -z "$NEVER_USE_THIS_VAR" ] ; then # are we called recursively ?
unset ENV # clear the environment
#---------------------------------------------------- set basic environment
typeset -x OS=$(uname -a | cut -d' ' -f1) # find out the OS
# read in standard environment
case "$OS" in
AIX)
. /etc/environment
;;
Linux)
. /etc/profile
;;
*)
. /etc/environment
;;
esac
# set default TERM variable
case "$OS" in
AIX)
TERMDEF="$(termdef)"
;;
Linux)
TERMDEF="$TERM"
;;
*)
TERMDEF="$TERM"
;;
esac
typeset -x TERM=${TERMDEF:-'wyse60'} # set default TERM variable
typeset -x LANG=C # default language environment
typeset -x EDITOR=vi # what else ? ;-))
typeset -x VISUAL=$EDITOR
typeset -x PATH="/usr/bin" # set the path
PATH="$PATH:/bin"
PATH="$PATH:/etc"
PATH="$PATH:/usr/sbin"
PATH="$PATH:/usr/ucb"
PATH="$PATH:/sbin"
PATH="$PATH:/usr/bin/X11"
PATH="$PATH:/usr/local/bin" # tools, home for scripts
PATH="$PATH:/usr/local/sbin" # -"-
typeset -x chTmpDir="" # path for temporary files
#---------------------------------------------------- debugging stuff
if [ -z "$chFullDebug" ] ; then # debug switch
typeset -x chFullDebug=""
else
typeset -x chFullDebug # export if already set
fi
typeset -x SIMULATE='' # set to 'print' for
# simulation mode
typeset -x TRACE='' # set to 'on' for trace mode
if [ -z "$DEVELOP" ] ; then
typeset -x FPATH="/usr/local/lib/ksh" # set fnc path for fnc lib
FPATH="$FPATH:/usr/local/bin"
FPATH="$FPATH:/usr/local/sbin"
else
typeset -x FPATH=~/lib # for lib development
fi
#---------------------------------------------------- global constants
typeset -x chProgName="$0" # const. for main program name
typeset -x chUsageShort="" # short usage message
typeset -x achUsageLong[0]="" # long usage message (line)
if [ -z "$fLogFile" ] ; then # log file
if [ $(f_ImRoot ; print $?) -eq 0 ] ; then
typeset -x fLogFile='/usr/local/log/system.log'
else
typeset -x fLogFile=~/system.log
fi
else
typeset -x fLogFile
fi
if [ -z "$fErrFile" ] ; then # error file
if [ $(f_ImRoot ; print $?) -eq 0 ] ; then
typeset -x fErrFile='/usr/local/log/system.err'
else
typeset -x fErrFile=~/system.err
fi
else
typeset -x fErrFile
fi
#---------------------------------------------------- automated mail
typeset -x chUser=$(id -nur)
#-------------------------------------------------- site dependent includes
# HP Open View at xxx
typeset -x AlertSW='OV' # alerting software
typeset -x AlertCmd='/usr/lpp/OV/bin/opcmsg' # for f_Alert()
typeset -x AlertApp='' # are defined in the script
typeset -x AlertObj=''
# HMC list for xxx
typeset -x CachHMC[1]="xxx-f-hmc1"
typeset -x CachHMC[2]="xxx-f-hmc2"
typeset -x CachHMC[3]="xxx-f-hmc3"
typeset -x CachHMC[4]="xxx-f-hmc4"
#-------------------------------------------------- reentrancy protection
typeset -x NEVER_USE_THIS_VAR="KILROY_WAS_HERE"
fi
# --- EOF f_env
Notice that there is a variable "DEVELOP": set it to any value and the script will use not the library in /usr/local/lib/ksh but the one in ~/lib. This way you can have a personal copy of the lib and tinker with it without affecting other scripts using the same functions. Also notice that i have some logging functions which all write to a continuous log defined here (/usr/local/log/system.log and /usr/local/log/system.err).
If you are interested i can eventually publish more functions from my library.
@Corona: ksh93 is a widely used shell. In every AIX version since 5L it is included (as ksh93) and in most Linux distributions it is part of the installable base. AIX uses a ksh88 (as ksh and as sh) as the default shell since AIX 4 (about 1997).
Hi all!
Hi all!
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Hi,
Could any one tell me how to compare to floating point no. using test command. As -eq option works on only intergers.
i=5.4
if
then
echo "equal"
else
echo "not equal"
fi
here output will be equal even though no. are unequal.
Thanks,
ravi (1 Reply)
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