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Full Discussion: Inotifywait restart script prevents reboot when started
Top Forums Shell Programming and Scripting Inotifywait restart script prevents reboot when started Post 303038346 by lowmaster on Friday 30th of August 2019 11:45:02 PM
Old 08-31-2019
Inotifywait restart script prevents reboot when started
Hi, maybe someone could help me optimizing this little script.


It works so far, but when running, reboot does not work. If kill inotifywait reboot from shell works. I think some optimization is required here.


This script starts at the end of the boot process, from an external device and starts a binary, logging the output, then inotify watches the config file, if changed it kills the binary and starts it again logging its output.


Code:
#!/bin/sh

wait 3

cmd="/usr/bin/binary -c /var/media/external/config.txt /var/media/external/config2.txt"

$cmd >> /var/media/external/binaries.log &

while inotifywait -e create,modify "/var/media/external/config2.txt"
do
    echo "A file or directory was modified."
killall -9 binary
wait 3
$cmd >> /var/media/external/binaries.log &

done

 

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LEARN ABOUT MINIX

reboot

REBOOT(2)							System Calls Manual							 REBOOT(2)

NAME

       reboot - close down the system or reboot

SYNTAX

       #define _MINIX_SOURCE 1

       #include <unistd.h>

       int reboot(int how, ...)

DESCRIPTION

       Reboot() is used to close down the system.  It allows several ways of shutting down depending on how:

       reboot(RBT_HALT)
	    Halt the system and return to the monitor prompt.

       reboot(RBT_REBOOT)
	    Reboot the system by letting the monitor execute the "boot" command.

       reboot(RBT_PANIC)
	    Cause a system panic.  This is not normally done from user mode, but by servers using the sys_abort() kernel call.

       reboot(RBT_MONITOR, code, length)
	    Halt the system and let the monitor execute the given code of the given length.  (code is of type char * and length of type size_t.)

       reboot(RBT_RESET)
	    Reboot the system with a hardware reset.

       Reboot() may only be executed by the super-user.

DIAGNOSTICS

       If the call succeeds, it never returns.	If something went wrong, the return value is -1 and an error is indicated by errno.

SEE ALSO

       shutdown(8), reboot(8), halt(8), sync(1).

NOTES

       Minix  can not return to the monitor if running in real mode, or if started from MS-DOS.  This means that most of the reboot functions will
       change to a reset.

AUTHOR

       Edvard Tuinder (v892231@si.hhs.NL)

																	 REBOOT(2)
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