ivarmu/bash_mutex

execute commands from the bash in a mutex-like way.

bash_mutex

This script is intended to execute commands from the bash in a mutex-like way.

# 
# Usage: bash_mutex.sh <-m 'mutex_name'> [-s] [-r] [-p] [-n <max_queue_length>] [-ml <max_lock_time>] [-mw <max_wait_time>] "command to run in a semaphore-like manner"
#
# Example: bash_mutex.sh -m 'echo' 'echo $$ >> /tmp/test'"
# Example: bash_mutex.sh -m 'echo2' -n 3 'echo $$ >> /tmp/test'"
# Example: bash_mutex.sh -m 'mutex' -ml 60 'echo $$ >> /tmp/test'"
# Example: bash_mutex.sh -m 'mutex2' -mw 30 'echo $$ >> /tmp/test'"
# Example: bash_mutex.sh -m 'label1' -n 3 -ml 60 -mw 30 'echo $$ >> /tmp/test'"
# Example: bash_mutex.sh -m 'get_static_mutex' -s
# Example: bash_mutex.sh -m 'get_static_mutex' -s -mw 30
# Example: bash_mutex.sh -m 'program_end_of_static_mutex' -p -ml 30 &
# Example: bash_mutex.sh -m 'release_static_mutex' -r
#
# NOTE: '-s', '-p' and '-r' options are used to set and release the mutexes manually for long running or multi-command mutex requirements.
# In that cases, the calling process is the responsible of the correct muttex release as <max_lock_time> is completely ignored.
#
# NOTE: '-p' may be usually executed in background (&), as it only programs the lock auto-release (don't execute any command).
#