On 3/30/22 1:40 AM, Alex fxmbsw7 Ratchev wrote: > i do > > wpa_supplicant -i"$if" -c<( printf %s\\n \ > 'network={' "ssid=\"$ssid\"" "psk=\"$pass\"" '}' > ) & > { sleep 3 ; dhclient "$if" ; } & > > which is simply wpa_supplicant -iiface -c<( conf file printing ) > > it since years resuts in such : i think before it said printf defuncted
Since printf is a shell builtin, there's no way for ps to reliably determine the name of the command in the process substitution. > root 1530 0.0 0.0 0 0 ? Z 07:19 0:00 \_ > [3.wpa] <defunct> Since the command is asynchronous, the shell forks and does word expansion in the subshell, at which point it creates the pipes for the process substitution. It then suppresses any additional forks and simply execs the sleep process. The shell started to run the process substitution sits there peacefully, not consuming any resources, until wpa_supplicant exits and everything gets reaped by init/systemd/whatever. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/