[Solved] Problem insert $1 value into a command Post: 302560530

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Top Forums Shell Programming and Scripting [Solved] Problem insert $1 value into a command Post 302560530 by PatMcDonagh on Friday 30th of September 2011 04:52:53 AM

09-30-2011

Registered User

[Solved] Problem insert $1 value into a command

Hi folks

I am trying to use a call to a python command within a shell script to help validate a date. If I hard code the date to be checked in the string it works. As follows

Code:

 
cmd_result=$(/usr/bin/python -c 'import time; print time.strftime("%d",time.strptime("31/02/2008", "%d/%m/%Y"))' \
 2>/dev/null | wc -l)
if [ ${cmd_result} -eq 0 ]; then
    echo "Date Invalid "
else
    echo "Date Valid"
fi

If i use $1 instead, i.e. passing the date as an input paramater (e.g ./sysReport.sh 23/04/2011), I cant seem to get the value in $1 to be picked up by the command. I am using the following.

Code:

 
datein=$1
cmd_result=$(/usr/bin/python -c "import time; print time.strftime('%d',time.strptime('" ${datein} "', '%d/%m/%Y'))" \
 2>/dev/null | wc -l)
if [ ${cmd_result} -eq 0 ]; then
    echo "Date Invalid "
else
    echo "Date Valid"
fi

I know that datein stores the value of the input parameter $1 but the execution of the python command always returns zero for valid or invalid dates.

I kow I am not using the reference to the ${datein} or $1 varaiable correctly but have tried numerous mechanisms without any joy.

I can easily just some code from the web that validates a date but this is more about why i cant seem to execute the python command and why i cant insert the contents of a variable into the command.

Any help explaining this or helping to find a solution would be appreciated.

PatMcDonagh

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platform::shell

platform::shell(3tcl)					       Tcl Bundled Packages					     platform::shell(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4						     platform::shell(3tcl)