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Full Discussion: How do I assign the output of a command to a variable within a loop in bash?
Top Forums UNIX for Beginners Questions & Answers How do I assign the output of a command to a variable within a loop in bash? Post 303033921 by sankasu on Sunday 14th of April 2019 04:02:29 PM
Old 04-14-2019
How do I assign the output of a command to a variable within a loop in bash?
In the else of the main if condition .

Code:
else
       set lnk = $(readlink -f <path> | cut -d '/' -f7)
        echo "$lnk" 
        if [[ "$lnk" == "$ver" ]]

When I run the above on command line , the execution seems to be fine and I get the desired output. But when I try to assign it to a variable within a loop , it doesnt get assigned.Hence the "if condition" after the variable assignment doesnt get evaluated.

Os Version : RHEL 6.0
Last edited by sankasu; 04-14-2019 at 05:11 PM.. Reason: An additional bracket made it to the code..removed the same
 

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pthread_condattr_init

pthread_condattr_init(3T)												 pthread_condattr_init(3T)

NAME

       pthread_condattr_init(), pthread_condattr_destroy() - initialize or destroy a condition variable attributes object.

SYNOPSIS

PARAMETERS

	      attr	Pointer to the condition variable attributes object to be initialized or destroyed.

DESCRIPTION

       initializes  the  condition  variable attributes object attr with the default values for all attributes.  The attributes object describes a
       condition variable in detail and is passed to the condition variable initialization function.

       When a condition variable attributes object is used to initialize a condition variable, the values of the individual  attributes  determine
       the  characteristics  of  the new condition variable. Attributes objects act like additional parameters to object initialization.  A single
       attributes object can be used in multiple calls to the function

       When a condition variable is initialized with an attributes object, the attributes are, in effect,  copied  into  the  condition  variable.
       Consequently, any change to the attributes object will not affect any previously initialized condition variables.  Once all condition vari-
       ables needing a specific attributes object have been initialized, the attributes object is no longer needed.

       The condition variable attributes and their default values are:

	      The default value is

       If an initialized condition variable attributes object is reinitialized, undefined behavior results.

       destroys the condition variable attributes object attr.	The destroyed condition  variable  attributes  object  ceases  to  exist  and  its
       resources  are  reclaimed. Using attr after it has been destroyed results in undefined behavior.  A destroyed condition variable attributes
       object can be reinitialized using the function

       Condition variables that have been already initialized using this attributes object are not affected by the destruction	of  the  condition
       variable attributes object.

RETURN VALUE

       Upon successful completion, and return zero.  Otherwise, an error number is returned to indicate the error (the variable is not set).

ERRORS

       If any of the following occur, the function returns the corresponding error number:

	      [ENOMEM]	     There is insufficient memory available in which to initialize the condition variable attributes object.

	      [EINVAL]	     attr is not a valid condition variable attributes object.

       For each of the following conditions, if the condition is detected, the function returns the corresponding error number:

	      [EINVAL]	     attr is not a valid condition variable attributes object.

AUTHOR

       and were derived from the IEEE POSIX P1003.1c standard.

SEE ALSO

       pthread_create(3T), pthread_condattr_getpshared(3T), pthread_cond_init(3T).

STANDARDS CONFORMANCE

								  Pthread Library					 pthread_condattr_init(3T)
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