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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LEARN ABOUT LINUX

suspend

suspend(1)                                                         User Commands                                                        suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                         suspend(1)