Substitution within string command Post: 302890335

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Top Forums Shell Programming and Scripting Substitution within string command Post 302890335 by Bruble on Wednesday 26th of February 2014 08:21:48 AM

02-26-2014

Registered User

Hi Subbeh,
I am trying to change

Code:

while test $count -le ${CURRENTRUNSCTRL}
      do
          if [ "$count" = 1 ]
          then mj7777_ver='1' start_mj7777_iteration
          fi
          if [ "$count" = 2 ]
          then mj7777_ver='2' start_mj7777_iteration
          fi
          if [ "$count" = 3 ]
          then mj7777_ver='3' start_mj7777_iteration
          fi
          if [ "$count" = 4 ]
          then mj7777_ver='4' start_mj7777_iteration
          fi
          if [ "$count" = 5 ]
          then mj7777_ver='5' start_mj7777_iteration
          fi
          if [ "$count" = 6 ]
          then mj7777_ver='6' start_mj7777_iteration
          fi
          if [ "$count" = 7 ]
          then mj7777_ver='7' start_mj7777_iteration
          fi
          if [ "$count" = 8 ]
          then mj7777_ver='8' start_mj7777_iteration
          fi
          if [ "$count" = 9 ]
          then mj7777_ver='9' start_mj7777_iteration
          fi
          let count=count+1
       done

to this

Code:

strcurrent=123456789
      count=1
      while test $count -le ${CURRENTRUNSCTRL}
      do
          ver=${strcurrent:${count}:1}
          mj7777_ver=${ver} start_mj7777_iteration
          let count=count+1
       done

so it is fewer lines and easier to read or add further threads

Thanks for your suggestion though as I will see if I can use it somehow

Last edited by Franklin52; 02-26-2014 at 09:59 AM.. Reason: Please use CODE tags, not ICODE tags for code blocks. Thanks.

Bruble

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_lwp_sema_trywait

_lwp_sema_wait(2)						   System Calls 						 _lwp_sema_wait(2)

NAME

       _lwp_sema_wait, _lwp_sema_trywait, _lwp_sema_init, _lwp_sema_post - semaphore operations

SYNOPSIS

       #include <sys/lwp.h>

       int _lwp_sema_wait(lwp_sema_t *sema);

       int _lwp_sema_trywait(lwp_sema_t *sema);

       int _lwp_sema_init(lwp_sema_t *sema, int count);

       int _lwp_sema_post(lwp_sema_t *sema);

DESCRIPTION

       Conceptually,  a  semaphore  is an non-negative integer count that is atomically incremented and decremented. Typically this represents the
       number of resources available. The _lwp_sema_init() function initializes the count, _lwp_sema_post() atomically increments the  count,  and
       _lwp_sema_wait() waits for the count to become greater than 0 and then atomically decrements it.

       LWP  semaphores	must  be  initialized  before  use.  The _lwp_sema_init() function initializes the count associated with the LWP semaphore
       pointed to by sema to count.

       The _lwp_sema_wait() function blocks the calling LWP until the semaphore count becomes greater than 0 and then atomically decrements it.

       The _lwp_sema_trywait() function atomically decrements the count if it is greater than zero. Otherwise it returns an error.

       The _lwp_sema_post() function atomically increments the semaphore count. If there are any LWPs blocked on the semaphore, one is unblocked.

RETURN VALUES

       Upon successful completion, 0 is returned. A non-zero value indicates an error.

ERRORS

       The _lwp_sema_init(), _lwp_sema_trywait(), _lwp_sema_wait(), and _lwp_sema_post() functions will fail if:

       EINVAL	 The sema argument points to an invalid semaphore.

       EFAULT	 The sema argument points to an illegal address.

       The  _lwp_sema_wait() function will fail if:

       EINTR	The function execution was interrupted by a signal or fork(2).

       The  _lwp_sema_trywait() function will fail if:

       EBUSY	The function was called on a semaphore with a zero count.

       The  _lwp_sema_post() function will fail if:

       EOVERFLOW    The value of the sema argument exceeds SEM_VALUE_MAX.

SEE ALSO

       fork(2)

SunOS 5.11							    8 May 1998							 _lwp_sema_wait(2)