I have a script in bash called Script.sh, and i need to know his own PID ( i need to get PID inside the Script.sh )
Any clues to realize this ?
Regards,
Debugger
+3
A:
use $BASHPID or $$
See the manual for more information, including differences between the two.
tvanfosson
2010-03-22 15:53:39
Do note that $$ and BASHPID are not always the same thing - the manual mentions this, and there's a more concrete example here: http://tldp.org/LDP/abs/html/internalvariables.html . The distinction can be pretty important, as a lot of bash constructs do run in subshells.
Jefromi
2010-03-22 16:00:07
@Jefromi -- noted. That was one of the reasons I linked to the manual.
tvanfosson
2010-03-22 16:14:42
A:
In addition to the example given in the Advanced Bash Scripting Guide referenced by Jefromi, these examples show how pipes create subshells:
$ echo $$ $BASHPID | cat -
11656 31528
$ echo $$ $BASHPID
11656 11656
$ echo $$ | while read line; do echo $line $$ $BASHPID; done
11656 11656 31497
$ while read line; do echo $line $$ $BASHPID; done <<< $$
11656 11656 11656
Dennis Williamson
2010-03-22 17:55:34