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UNIX for Dummies Questions & Answers
if...elif...fi condition in Unix
Post 27544 by Kelam_Magnus on Tuesday 3rd of September 2002 02:55:46 PM
09-03-2002
In the man page it shows an example. But you are correct that test statement is usually used with another structure.
It is usually used in conjuction with some type of conditional statement like while, for, if, until, etc...
while test -r <myfile> # if the file exists
do
somecommand
done
OR
[ ! -f thisfile ] && echo default > thisfile
My brain is your brain....
It is usually used in conjuction with some type of conditional statement like while, for, if, until, etc...
while test -r <myfile> # if the file exists
do
somecommand
done
OR
[ ! -f thisfile ] && echo default > thisfile
My brain is your brain....
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LEARN ABOUT SUNOS
_lwp_cond_signal
_lwp_cond_signal(2) System Calls _lwp_cond_signal(2) NAME
_lwp_cond_signal, _lwp_cond_broadcast - signal a condition variable SYNOPSIS
#include <sys/lwp.h> int _lwp_cond_signal(lwp_cond_t *cvp); int _lwp_cond_broadcast(lwp_cond_t *cvp); DESCRIPTION
The _lwp_cond_signal() function unblocks one LWP that is blocked on the LWP condition variable pointed to by cvp. The _lwp_cond_broadcast() function unblocks all LWPs that are blocked on the LWP condition variable pointed to by cvp. If no LWPs are blocked on the LWP condition variable, then _lwp_cond_signal() and _lwp_cond_broadcast() have no effect. Both functions should be called under the protection of the same LWP mutex lock that is used with the LWP condition variable being sig- naled. Otherwise, the condition variable may be signalled between the test of the associated condition and blocking in _lwp_cond_wait(). This can cause an infinite wait. RETURN VALUES
Upon successful completion, 0 is returned. A non-zero value indicates an error. ERRORS
The _lwp_cond_signal() and _lwp_cond_broadcast() functions will fail if: EINVAL The cvp argument points to an invalid LWP condition variable. EFAULT The cvp argument points to an invalid address. SEE ALSO
_lwp_cond_wait(2), _lwp_mutex_lock(2) SunOS 5.10 8 Dec 1995 _lwp_cond_signal(2)