PS(1) PS(1)
NAME
ps, psu, pstree - process status
SYNOPSIS
ps [ -apnr ]
psu [ -apnr ] [ user ]
pstree [ pid ]
DESCRIPTION
Ps prints information about processes. Psu prints only
information about processes started by user (default $user).
For each process reported, the user, process id, user time,
system time, size, state, and command name are printed.
State is one of the following:
Moribund Process has exited and is about to have its
resources reclaimed.
Ready on the queue of processes ready to be run.
Scheding about to be run.
Running running.
Queueing waiting on a queue for a resource.
Wakeme waiting for I/O or some other kernel event to
wake it up.
Broken dead of unnatural causes; lingering so that it
can be examined.
Stopped stopped.
Stopwait waiting for another process to stop.
Fault servicing a page fault.
Idle waiting for something to do (kernel processes
only).
New being created.
Pageout paging out some other process.
Syscall performing the named system call.
Page 1 Plan 9 (printed 12/22/24)
PS(1) PS(1)
no resource waiting for more of a critical resource.
The -n flag causes ps to print, after the process id, the
note group to which the process belongs.
The -r flag causes ps to print, before the user time, the
elapsed real time for the process.
The -p flag causes ps to print, after the system time, the
baseline and current priorities of each process.
The -a flag causes ps to print the arguments for the pro-
cess. Newlines in arguments will be translated to spaces
for display.
Pstree prints the processes as a tree in a two-column layout
where the first column being the process id and second col-
umn the program name and arguments indented and prefixed
with line drawing runes to reflect the nesting in the hier-
archy. It optionally accepts an argument pid to only print
a tree for the corresponding process.
FILES
/proc/*/status
SOURCE
/sys/src/cmd/ps.c
/rc/bin/psu
/rc/bin/pstree
SEE ALSO
acid(1), db(1), kill(1), ns(1), proc(3)
HISTORY
Pstree first appeared in 9front (June, 2011).
Page 2 Plan 9 (printed 12/22/24)