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Full Discussion: Difference between [condition] and [[condition]] and ((condition)) when used with if condition
Operating Systems HP-UX Difference between [condition] and [[condition]] and ((condition)) when used with if condition Post 302520345 by methyl on Friday 6th of May 2011 01:03:21 PM
Old 05-06-2011
Within "man sh-posix" see the section on "Conditonal Expressions" for the explanation of conditions within [[ ]] .
See "man test" for an explanation of "Test" within [ ] .
Though there is some common syntax between a "Conditional Expression" and a "Test" there is also much syntax which is exclusive. For example the AND and OR operators are quite different.
As far as I know, there is no ">" operator.

I have never found use for (( )) as an Arithmetic Test and cannot comment. Others may have seen it used.


BEWARE. The ">" sign you are using is not valid syntax. Your test scripts may not be doing what you expect.
Quote:
if [ 234 > 71 ];then
echo "correct"
else
echo "wrong"
fi
The above script creates a FILE called "71" and the "if" test is "true" because this process worked.
Suggest you check all your examples for this problem and check the directory list after each try!
Last edited by methyl; 05-06-2011 at 02:10 PM..
 

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LEARN ABOUT OSF1

tis_cond_destroy

tis_cond_destroy(3)					     Library Functions Manual					       tis_cond_destroy(3)

NAME

       tis_cond_destroy - Destroys the specified condition variable.

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <tis.h>

       int tis_cond_destroy(
			  pthread_cond_t  *cond);

STANDARDS

       None

PARAMETERS

       Address of the condition variable (passed by reference) to be destroyed.

DESCRIPTION

       This routine destroys the condition variable specified by cond.	After this routine is called, DECthreads may reclaim internal storage used
       by the condition variable object. Call this routine when a condition variable will no longer be referenced.

       The results of this routine are unpredictable if the condition variable specified in cond does not exist or is not initialized.

       For more information about actions when threads are present, refer to the pthread_cond_destroy(3) description.

RETURN VALUES

       If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are  as  follows:
       Successful  completion.	 The  object  being  referenced  by  cond  is  being  referenced  by  another  thread  that is currently executing
       tis_cond_wait(3) on the condition variable specified in cond.  (This error can only occur when threads are present.)  The  value  specified
       by cond is not a valid condition variable.

ERRORS

       None

RELATED INFORMATION

       Functions: tis_cond_broadcast(3), tis_cond_init(3), tis_cond_signal(3), tis_cond_wait(3)

       Manuals: Guide to DECthreads and Programmer's Guide

       delim off

															       tis_cond_destroy(3)
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