Daemon not executing shell file Post: 302985115

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Top Forums Shell Programming and Scripting Daemon not executing shell file Post 302985115 by vbe on Saturday 5th of November 2016 07:23:31 AM

11-05-2016

Moderator

I was also puzzled by your if test as it looked as you were comparing a char with a char or numeric ( -lt ) "$value" is to me a char ( or could be seen as a string of one or more characters... ) so it cant be less than as less than means you are dealing with numbers
To be sure I have a num in a variable affection I use e.g.

Code:

 let RING=0

So here

Code:

 if [ "$RING" -eq 1 ]

I really have a doubt but I am not a bash user and so maybe that can pass...
Only here is where things get tricky, on a true UNIX system init uses /bin/sh and its path is very.very limited: /bin:/usr/bin... And you dont know where you are: if it needs to write in current directory. depending where, you find yourself ( as user is pi..) with no permissions....
And I am not sure that a real Bourne shell would like the above if test... and so it will never execute what you expected
All that to say it may work for you but it may very well in that case, be portable, so complying to old standards have an advantage, old guys like some of us will very easily point out the errors or issues, using fancy last versions of shells that we may not use makes things far more difficult to read, understand and test...

All the best and welcome here

Last edited by vbe; 11-05-2016 at 10:18 AM.. Reason: Corrected but not sure I am very clear, sorry about that, English isnt my main language too

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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)