bash - Does pipexec create some subprocesses? -

i using pipexec tool manage communication between processes. task requires me retrieve ids of processes communicate.

example:

pipexec -- [ ./cmd1 ] [ b ./cmd2 ] "{a:1>b:0}" "{b:1>a:0}" & 

then:

ps --ppid xxxx 

where xxxx pid of pipexec process. can sure there 2 processes displayed or there possibility pipexec run internal process @ point of running?

from pipexec man page:

pipexec creates arbitrary network (directed graph) of processes , pipes in between - cycles possible. overcomes shortcomings of shells typically able create non cyclic trees.

pipexec monitors it's child processes , able restart whole network of processes , pipes if 1 crashes. therefore pipexec can used in sysv-init or systemd configuration run network of processes.

so, it's possible in case of failures when pipexec restarts the "network", create more processes know. assuming there no failures, appears pipexec creates number of processes have specified. experimentally, see:

$ ps -af uid        pid  ppid  c stime tty          time cmd usr  6531 29605  0 13:02 pts/9    00:00:00 pipexec -- [ /bin/sleep 30 ] [ b /bin/sleep 40 ] usr  6532  6531  0 13:02 pts/9    00:00:00 /bin/sleep 30 usr  6533  6531  0 13:02 pts/9    00:00:00 /bin/sleep 40 

when running:

pipexec -- [ /bin/sleep 30 ] [ b /bin/sleep 40 ] 

this may or may not universally true. couldn't find in documentation says on this.