freebsd-skq/usr.bin/procstat/procstat.1

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.\" Copyright (c) 2007-2009 Robert N. M. Watson
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.Dd May 16, 2014
.Dt PROCSTAT 1
.Os
.Sh NAME
.Nm procstat
.Nd get detailed process information
.Sh SYNOPSIS
.Nm
.Op Fl CHhn
.Op Fl w Ar interval
.Op Fl b | c | e | f | i | j | k | l | r | s | t | v | x
.Op Fl a | Ar pid | Ar core ...
.Sh DESCRIPTION
The
.Nm
utility displays detailed information about the processes identified by the
.Ar pid
arguments, or if the
.Fl a
flag is used, all processes.
It can also display information extracted from a process core file, if
the core file is specified as the argument.
.Pp
By default, basic process statistics are printed; one of the following
options may be specified in order to select more detailed process information
for printing:
.Bl -tag -width indent
.It Fl b
Display binary information for the process.
.It Fl c
Display command line arguments for the process.
.It Fl e
Display environment variables for the process.
.It Fl f
Display file descriptor information for the process.
.It Fl i
Display signal pending and disposition information for the process.
.It Fl j
Display signal pending and blocked information for the process's threads.
.It Fl k
Display the stacks of kernel threads in the process, excluding stacks of
threads currently running on a CPU and threads with stacks swapped to disk.
If the flag is repeated, function offsets as well as function names are
printed.
.It Fl l
Display resource limits for the process.
.It Fl r
Display resource usage information for the process.
.It Fl s
Display security credential information for the process.
.It Fl t
Display thread information for the process.
.It Fl v
Display virtual memory mappings for the process.
.It Fl x
Display ELF auxiliary vector for the process.
.El
.Pp
All options generate output in the format of a table, the first field of
which is the process ID to which the row of information corresponds.
The
.Fl h
flag may be used to suppress table headers.
.Pp
The
.Fl w
flag may be used to specify a wait interval at which to repeat the printing
of the requested process information.
If the
.Fl w
flag is not specified, the output will not repeat.
.Pp
The
.Fl C
flag requests the printing of additional capability information in the file
descriptor view.
.Pp
The
.Fl H
flag may be used to request per-thread statistics rather than per-process
statistics for some options.
For those options, the second field in the table will list the thread ID
to which the row of information corresponds.
.Pp
Some information, such as VM and file descriptor information, is available
only to the owner of a process or the superuser.
.Ss Binary Information
Display the process ID, command, and path to the process binary:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It OSREL
osreldate for process binary
.It PATH
path to process binary (if available)
.El
.Ss Command Line Arguments
Display the process ID, command, and command line arguments:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It ARGS
command line arguments (if available)
.El
.Ss Environment Variables
Display the process ID, command, and environment variables:
.Pp
.Bl -tag -width "ENVIRONMENT" -compact
.It PID
process ID
.It COMM
command
.It ENVIRONMENT
environment variables (if available)
.El
.Ss File Descriptors
Display detailed information about each file descriptor referenced by a
process, including the process ID, command, file descriptor number, and
per-file descriptor object information, such as object type and file system
path.
By default, the following information will be printed:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It FD
file descriptor number or cwd/root/jail
.It T
file descriptor type
.It V
vnode type
.It FLAGS
file descriptor flags
.It REF
file descriptor reference count
.It OFFSET
file descriptor offset
.It PRO
network protocol
.It NAME
file path or socket addresses (if available)
.El
.Pp
The following file descriptor types may be displayed:
.Pp
.Bl -tag -width X -compact
.It c
crypto
.It e
POSIX semaphore
.It f
fifo
.It h
shared memory
.It k
kqueue
.It m
message queue
.It p
pipe
.It s
socket
.It t
pseudo-terminal master
.It v
vnode
.El
.Pp
The following vnode types may be displayed:
.Pp
.Bl -tag -width X -compact
.It -
not a vnode
.It b
block device
.It c
character device
.It d
directory
.It f
fifo
.It l
symbolic link
.It r
regular file
.It s
socket
.It x
revoked device
.El
.Pp
The following file descriptor flags may be displayed:
.Pp
.Bl -tag -width X -compact
.It r
read
.It w
write
.It a
append
.It s
async
.It f
fsync
.It n
non-blocking
.It d
direct I/O
.It l
lock held
.El
.Pp
If the
.Fl C
flag is specified, the vnode type, reference count, and offset fields will be
omitted, and a new capabilities field will be included listing capabilities,
as described in
.Xr cap_rights_limit 2 ,
present for each capability descriptor.
.Ss Signal Disposition Information
Display signal pending and disposition for a process:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It SIG
signal name
.It FLAGS
process signal disposition details, three symbols
.Bl -tag -width X -compact
.It P
if signal is pending in the global process queue, - otherwise
.It I
if signal delivery disposition is SIGIGN, - otherwise
.It C
if signal delivery is to catch it, - otherwise
.El
.El
.Pp
If
.Fl n
switch is given, the signal numbers are shown instead of signal names.
.Ss Thread Signal Information
Display signal pending and blocked for a process's threads:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It TID
thread ID
.It COMM
command
.It SIG
signal name
.It FLAGS
thread signal delivery status, two symbols
.Bl -tag -width X -compact
.It P
if signal is pending for the thread, - otherwise
.It B
if signal is blocked in the thread signal mask, - if not blocked
.El
.El
.Pp
The
.Fl n
switch has the same effect as for the
.Fl i
switch: the signal numbers are shown instead of signal names.
.Ss Kernel Thread Stacks
Display kernel thread stacks for a process, allowing further interpretation
of thread wait channels.
If the
.Fl k
flag is repeated, function offsets, not just function names, are printed.
.Pp
This feature requires
.Cd "options STACK"
or
.Cd "options DDB"
to be compiled into the kernel.
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It TID
thread ID
.It COMM
command
.It TDNAME
thread name
.It KSTACK
kernel thread call stack
.El
.Ss Resource Limits
Display resource limits for a process:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It RLIMIT
resource limit name
.It SOFT
soft limit
.It HARD
hard limit
.El
.Ss Resource Usage
Display resource usage for a process.
If the
.Fl H
flag is specified,
resource usage for individual threads is displayed instead.
.Pp
.Bl -tag -width "RESOURCE" -compact
.It PID
process ID
.It TID
thread ID
.Po
if
.Fl H
is specified
.Pc
.It COMM
command
.It RESOURCE
resource name
.It VALUE
current usage
.El
.Ss Security Credentials
Display process credential information:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It EUID
effective user ID
.It RUID
real user ID
.It SVUID
saved user ID
.It EGID
effective group ID
.It RGID
real group ID
.It SVGID
saved group ID
.It UMASK
file creation mode mask
.It FLAGS
credential flags
.It GROUPS
group set
.El
.Pp
The following credential flags may be displayed:
.Pp
.Bl -tag -width X -compact
.It C
capability mode
.El
.Ss Thread Information
Display per-thread information, including process ID, per-thread ID, name,
CPU, and execution state:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It TID
thread ID
.It COMM
command
.It TDNAME
thread name
.It CPU
current or most recent CPU run on
.It PRI
thread priority
.It STATE
thread state
.It WCHAN
thread wait channel
.El
.Ss Virtual Memory Mappings
Display process virtual memory mappings, including addresses, mapping
meta-data, and mapped object information:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It START
starting address of mapping
.It END
ending address of mapping
.It PRT
protection flags
.It RES
resident pages
.It PRES
private resident pages
.It REF
reference count
.It SHD
shadow page count
.It FL
mapping flags
.It TP
VM object type
.El
.Pp
The following protection flags may be displayed:
.Pp
.Bl -tag -width X -compact
.It r
read
.It w
write
.It x
execute
.El
.Pp
The following VM object types may be displayed:
.Pp
.Bl -tag -width XX -compact
.It --
none
.It dd
dead
.It df
default
.It dv
device
.It md
device with managed pages
.Pq GEM/TTM
.It ph
physical
.It sg
scatter/gather
.It sw
swap
.It vn
vnode
.El
.Pp
The following mapping flags may be displayed:
.Pp
.Bl -tag -width X -compact
.It C
copy-on-write
.It N
needs copy
.It S
one or more superpage mappings are used
.It D
grows down (top-down stack)
.It U
grows up (bottom-up stack)
.El
.Ss ELF Auxiliary Vector
Display ELF auxiliary vector values:
.Pp
.Bl -tag -width indent -compact
.It PID
process ID
.It COMM
command
.It AUXV
auxiliary vector name
.It VALUE
auxiliary vector value
.El
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr fstat 1 ,
.Xr ps 1 ,
.Xr sockstat 1 ,
.Xr cap_enter 2 ,
.Xr cap_rights_limit 2 ,
.Xr ddb 4 ,
.Xr stack 9
.Sh AUTHORS
.An Robert N M Watson
.Sh BUGS
Some field values may include spaces, which limits the extent to which the
output of
.Nm
may be mechanically parsed.
.Pp
The display of open file or memory mapping pathnames is implemented using the
kernel's name cache.
If a file system does not use the name cache, or the path to a file is not in
the cache, a path will not be displayed.
.Pp
.Nm
currently supports extracting data only from a live kernel, and not from
kernel crash dumps.