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Full Discussion: Max size of variable
Top Forums Shell Programming and Scripting Max size of variable Post 29002 by Perderabo on Friday 27th of September 2002 09:16:35 AM
Old 09-27-2002
ksh dynamically allocates space for variable names and does not impose a limit on the length of a name. There is a limit on the maximum length of an input line and this will indirectly impose a limit on variable name length. Your version of ksh should guarantee that it can handle a command line of at least LINE_MAX length. Your value for LINE_MAX may be on a limits man page.

I just test a script that uses a 1067 character variable and it works. I set it to zero and I echoed the value. But since my LINE_MAX is 2048, I could not echo it twice in one echo statement. Nor could I add 1 to its value.

Good programming technique will dictate much smaller variable sizes.
 

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LEARN ABOUT MINIX

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)
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