top(1): pull configuration directly into header files
This sets configuration variables directly in the various header files, avoiding the need to have special logic in our Makefile to build the header.
This commit is contained in:
eadler
parent
540c3db568
commit
4e4f3a8d0c
@ -16,15 +16,4 @@ SIGNAL_H= ${SRCTOP}/sys/sys/signal.h
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sigdesc.h: sigconv.awk ${SIGNAL_H}
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awk -f ${SRCTOP}/usr.bin/top/sigconv.awk < ${SIGNAL_H} > ${.TARGET}
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.SUFFIXES: .xs .x .hs .h
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.xs.x .hs.h:
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@${ECHO} Making ${.TARGET} from ${.IMPSRC}
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@sed -e's,%LoadMax%,5.0,g' \
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-e's,%TableSize%,20011,g' \
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-e's,%NominalTopn%,18,g' \
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-e's,%topn%,-1,g' \
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-e's,%delay%,2,g' \
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-e's,%random%,1,g' \
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${.IMPSRC} > ${.TARGET}
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.include <bsd.prog.mk>
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@ -251,7 +251,7 @@ char *argv[];
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static char tempbuf1[50];
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static char tempbuf2[50];
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int old_sigmask; /* only used for BSD-style signals */
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int topn = Default_TOPN;
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int topn = Infinity;
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int delay = Default_DELAY;
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int displays = 0; /* indicates unspecified */
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int sel_ret = 0;
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@ -268,9 +268,7 @@ char *argv[];
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char do_unames = Yes;
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char interactive = Maybe;
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char warnings = 0;
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#if Default_TOPN == Infinity
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char topn_specified = No;
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#endif
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char ch;
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char *iptr;
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char no_command = 1;
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@ -525,12 +523,10 @@ char *argv[];
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myname);
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warnings++;
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}
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#if Default_TOPN == Infinity
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else
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{
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topn_specified = Yes;
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}
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#endif
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}
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/* tricky: remember old value of preset_argc & set preset_argc = 0 */
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@ -608,12 +604,8 @@ char *argv[];
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* and the default is Infinity, then (and only then) we use
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* "Nominal_TOPN" instead.
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*/
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#if Default_TOPN == Infinity
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topn = smart_terminal ? Largest :
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(topn_specified ? Largest : Nominal_TOPN);
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#else
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topn = Largest;
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#endif
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}
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/* set header display accordingly */
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@ -10,8 +10,7 @@
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#ifndef TOP_H
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#define TOP_H
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/* Current major version number */
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#define VERSION 3
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#define Default_DELAY 2
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/* Number of lines of header information on the standard screen */
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extern int Header_lines; /* 7 */
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@ -49,4 +48,32 @@ extern int pcpu_stats;
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char* kill_procs(char *);
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char* renice_procs(char *);
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/*
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* The space command forces an immediate update. Sometimes, on loaded
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* systems, this update will take a significant period of time (because all
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* the output is buffered). So, if the short-term load average is above
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* "LoadMax", then top will put the cursor home immediately after the space
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* is pressed before the next update is attempted. This serves as a visual
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* acknowledgement of the command.
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*/
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#define LoadMax 5.0
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/*
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* "Nominal_TOPN" is used as the default TOPN when
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* the output is a dumb terminal. If we didn't do this, then
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* we will get every
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* process in the system when running top on a dumb terminal (or redirected
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* to a file). Note that Nominal_TOPN is a default: it can still be
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* overridden on the command line, even with the value "infinity".
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*/
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#define Nominal_TOPN 18
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/*
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* If the local system's getpwnam interface uses random access to retrieve
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* a record (i.e.: 4.3 systems, Sun "yellow pages"), then defining
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* RANDOM_PW will take advantage of that fact.
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*/
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#define RANDOM_PW 1
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#endif /* TOP_H */
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@ -1,68 +0,0 @@
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/*
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* Top - a top users display for Berkeley Unix
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*
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* Definitions for things that might vary between installations.
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*/
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/*
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* The space command forces an immediate update. Sometimes, on loaded
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* systems, this update will take a significant period of time (because all
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* the output is buffered). So, if the short-term load average is above
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* "LoadMax", then top will put the cursor home immediately after the space
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* is pressed before the next update is attempted. This serves as a visual
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* acknowledgement of the command. On Suns, "LoadMax" will get multiplied by
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* "FSCALE" before being compared to avenrun[0]. Therefore, "LoadMax"
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* should always be specified as a floating point number.
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*/
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#ifndef LoadMax
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#define LoadMax %LoadMax%
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#endif
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/*
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* "Table_size" defines the size of the hash tables used to map uid to
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* username. The number of users in /etc/passwd CANNOT be greater than
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* this number. If the error message "table overflow: too many users"
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* is printed by top, then "Table_size" needs to be increased. Things will
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* work best if the number is a prime number that is about twice the number
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* of lines in /etc/passwd.
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*/
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#ifndef Table_size
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#define Table_size %TableSize%
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#endif
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/*
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* "Nominal_TOPN" is used as the default TOPN when Default_TOPN is Infinity
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* and the output is a dumb terminal. If we didn't do this, then
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* installations who use a default TOPN of Infinity will get every
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* process in the system when running top on a dumb terminal (or redirected
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* to a file). Note that Nominal_TOPN is a default: it can still be
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* overridden on the command line, even with the value "infinity".
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*/
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#ifndef Nominal_TOPN
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#define Nominal_TOPN %NominalTopn%
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#endif
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#ifndef Default_TOPN
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#define Default_TOPN %topn%
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#endif
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#ifndef Default_DELAY
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#define Default_DELAY %delay%
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#endif
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/*
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* If the local system's getpwnam interface uses random access to retrieve
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* a record (i.e.: 4.3 systems, Sun "yellow pages"), then defining
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* RANDOM_PW will take advantage of that fact. If RANDOM_PW is defined,
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* then getpwnam is used and the result is cached. If not, then getpwent
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* is used to read and cache the password entries sequentially until the
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* desired one is found.
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*
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* We initially set RANDOM_PW to something which is controllable by the
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* Configure script. Then if its value is 0, we undef it.
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*/
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#define RANDOM_PW %random%
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#if RANDOM_PW == 0
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#undef RANDOM_PW
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#endif
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@ -1,459 +0,0 @@
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.\" NOTE: changes to the manual page for "top" should be made in the
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.\" file "top.X" and NOT in the file "top.1".
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.\" $FreeBSD$
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.nr N %topn%
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.nr D %delay%
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.TH TOP 1 Local
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.UC 4
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.SH NAME
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top \- display and update information about the top cpu processes
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.SH SYNOPSIS
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.B top
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[
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.B \-abCHIijnPqStuvwz
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] [
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.BI \-d count
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] [
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.BI \-m io | cpu
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] [
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.BI \-o field
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] [
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.BI \-s time
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] [
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.BI \-J jail
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] [
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.BI \-U username
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] [
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.I number
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]
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.SH DESCRIPTION
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.\" This defines appropriate quote strings for nroff and troff
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.ds lq \&"
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.ds rq \&"
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.if t .ds lq ``
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.if t .ds rq ''
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.\" Just in case these number registers aren't set yet...
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.if \nN==0 .nr N 10
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.if \nD==0 .nr D 2
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.I Top
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displays the top
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.if !\nN==-1 \nN
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processes on the system and periodically updates this information.
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.if \nN==-1 \
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\{\
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If standard output is an intelligent terminal (see below) then
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as many processes as will fit on the terminal screen are displayed
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by default. Otherwise, a good number of them are shown (around 20).
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.\}
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Raw cpu percentage is used to rank the processes. If
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.I number
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is given, then the top
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.I number
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processes will be displayed instead of the default.
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.PP
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.I Top
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makes a distinction between terminals that support advanced capabilities
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and those that do not. This
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distinction affects the choice of defaults for certain options. In the
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remainder of this document, an \*(lqintelligent\*(rq terminal is one that
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supports cursor addressing, clear screen, and clear to end of line.
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Conversely, a \*(lqdumb\*(rq terminal is one that does not support such
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features. If the output of
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.I top
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is redirected to a file, it acts as if it were being run on a dumb
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terminal.
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.SH OPTIONS
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.TP
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.B \-C
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Toggle CPU display mode.
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By default top displays the weighted CPU percentage in the WCPU column
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(this is the same value that
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.IR ps (1)
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displays as CPU).
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Each time
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.B \-C
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flag is passed it toggles between \*(lqraw cpu\*(rq mode
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and \*(lqweighted cpu\*(rq mode, showing the \*(lqCPU\*(rq or
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the \*(lqWCPU\*(rq column respectively.
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.TP
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.B \-S
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Show system processes in the display. Normally, system processes such as
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the pager and the swapper are not shown. This option makes them visible.
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.TP
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.B \-a
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Display command names derived from the argv[] vector, rather than real
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executable name. It's useful when you want to watch applications, that
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puts their status information there. If the real name differs from argv[0],
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it will be displayed in parenthesis.
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.TP
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.B \-b
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Use \*(lqbatch\*(rq mode. In this mode, all input from the terminal is
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ignored. Interrupt characters (such as ^C and ^\e) still have an effect.
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This is the default on a dumb terminal, or when the output is not a terminal.
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.TP
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.B \-H
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Display each thread for a multithreaded process individually.
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By default a single summary line is displayed for each process.
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.TP
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.B \-i
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Use \*(lqinteractive\*(rq mode. In this mode, any input is immediately
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read for processing. See the section on \*(lqInteractive Mode\*(rq
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for an explanation of
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which keys perform what functions. After the command is processed, the
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screen will immediately be updated, even if the command was not
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understood. This mode is the default when standard output is an
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intelligent terminal.
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.TP
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.B \-I
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Do not display idle processes.
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By default, top displays both active and idle processes.
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.TP
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.B \-j
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Display the
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.IR jail (8)
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ID.
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.TP
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.B \-t
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Do not display the
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.I top
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process.
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.TP
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.BI \-m display
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Display either 'cpu' or 'io' statistics. Default is 'cpu'.
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.TP
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.B \-n
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Use \*(lqnon-interactive\*(rq mode. This is identical to \*(lqbatch\*(rq
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mode.
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.TP
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.B \-P
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Display per-cpu CPU usage statistics.
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.TP
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.B \-q
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Renice
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.I top
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to -20 so that it will run faster. This can be used when the system is
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being very sluggish to improve the possibility of discovering the problem.
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This option can only be used by root.
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.TP
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.B \-u
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Do not take the time to map uid numbers to usernames. Normally,
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.I top
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will read as much of the file \*(lq/etc/passwd\*(rq as is necessary to map
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all the user id numbers it encounters into login names. This option
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disables all that, while possibly decreasing execution time. The uid
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numbers are displayed instead of the names.
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.TP
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.B \-v
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Write version number information to stderr then exit immediately.
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No other processing takes place when this option is used. To see current
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revision information while top is running, use the help command \*(lq?\*(rq.
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.TP
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.B \-w
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Display approximate swap usage for each process.
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.TP
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.B \-z
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Do not display the system idle process.
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.TP
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.BI \-d count
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Show only
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.I count
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displays, then exit. A display is considered to be one update of the
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screen. This option allows the user to select the number of displays he
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wants to see before
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.I top
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automatically exits. For intelligent terminals, no upper limit
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is set. The default is 1 for dumb terminals.
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.TP
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.BI \-s time
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Set the delay between screen updates to
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.I time
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seconds. The default delay between updates is \nD seconds.
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.TP
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.BI \-o field
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Sort the process display area on the specified field. The field name
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is the name of the column as seen in the output, but in lower case:
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\*(lqcpu\*(lq, \*(rqsize\*(lq, \*(rqres\*(lq, \*(rqtime\*(lq,
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\*(rqpri\*(lq, \*(rqthreads\*(lq, \*(lqtotal\*(lq, \*(rqread\*(lq,
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\*(rqwrite\*(lq, \*(rqfault\*(lq, \*(rqvcsw\*(lq, \*(rqivcsw\*(lq,
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\*(lqjid\*(lq, \*(rqswap\*(lq or \*(rqpid\*(lq.
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.TP
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.BI \-J jail
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Show only those processes owned by
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.IR jail .
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This may be either the
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.B jid
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or
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.B name
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of the jail.
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Use
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.B 0
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to limit to host processes.
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Using this option implies the
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.B \-j
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flag.
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.PP
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.BI \-U username
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Show only those processes owned by
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.IR username .
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This option currently only accepts usernames and will not understand
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uid numbers.
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.PP
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Both
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.I count
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and
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.I number
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fields can be specified as \*(lqinfinite\*(rq, indicating that they can
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stretch as far as possible. This is accomplished by using any proper
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prefix of the keywords
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\*(lqinfinity\*(rq,
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\*(lqmaximum\*(rq,
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or
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\*(lqall\*(rq.
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The default for
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.I count
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on an intelligent terminal is, in fact,
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.BI infinity .
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.PP
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The environment variable
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.B TOP
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is examined for options before the command line is scanned. This enables
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a user to set his or her own defaults. The number of processes to display
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can also be specified in the environment variable
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.BR TOP .
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The options
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.BR \-a ,
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.BR \-C ,
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.BR \-H ,
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.BR \-I ,
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.BR \-j ,
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.BR \-P ,
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.BR \-S ,
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.BR \-t ,
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.BR \-u ,
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.BR \-w ,
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and
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.B \-z
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are actually toggles. A second specification of any of these options
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will negate the first. Thus a user who has the environment variable
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.B TOP
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set to \*(lq\-I\*(rq may use the command \*(lqtop \-I\*(rq to see idle processes.
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.SH "INTERACTIVE MODE"
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When
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.I top
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is running in \*(lqinteractive mode\*(rq, it reads commands from the
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terminal and acts upon them accordingly. In this mode, the terminal is
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put in \*(lqCBREAK\*(rq, so that a character will be
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processed as soon as it is typed. Almost always, a key will be
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pressed when
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.I top
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is between displays; that is, while it is waiting for
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.I time
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seconds to elapse. If this is the case, the command will be
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processed and the display will be updated immediately thereafter
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(reflecting any changes that the command may have specified). This
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happens even if the command was incorrect. If a key is pressed while
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.I top
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is in the middle of updating the display, it will finish the update and
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then process the command. Some commands require additional information,
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and the user will be prompted accordingly. While typing this information
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in, the user's erase and kill keys (as set up by the command
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.IR stty )
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are recognized, and a newline terminates the input.
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.PP
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These commands are currently recognized (^L refers to control-L):
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.TP
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.B ^L
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Redraw the screen.
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.IP "\fBh\fP\ or\ \fB?\fP"
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Display a summary of the commands (help screen). Version information
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is included in this display.
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.TP
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.B q
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Quit
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.IR top.
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.TP
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.B d
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Change the number of displays to show (prompt for new number).
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Remember that the next display counts as one, so typing
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.B d1
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will make
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.I top
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show one final display and then immediately exit.
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.TP
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.B m
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Toggle the display between 'cpu' and 'io' modes.
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.TP
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.B n or #
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Change the number of processes to display (prompt for new number).
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.TP
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.B s
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Change the number of seconds to delay between displays
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(prompt for new number).
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.TP
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.B S
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Toggle the display of system processes.
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.TP
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.B a
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Toggle the display of process titles.
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.TP
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.B k
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Send a signal (\*(lqkill\*(rq by default) to a list of processes. This
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acts similarly to the command
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.IR kill (1)).
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.TP
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.B r
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Change the priority (the \*(lqnice\*(rq) of a list of processes.
|
||||
This acts similarly to the command
|
||||
.IR renice (8)).
|
||||
.TP
|
||||
.B u
|
||||
Display only processes owned by a specific set of usernames (prompt for
|
||||
username). If the username specified is simply \*(lq+\*(rq or \*(lq-\*(rq,
|
||||
then processes belonging to all users will be displayed. Usernames can be added
|
||||
to and removed from the set by prepending them with \*(lq+\*(rq and
|
||||
\*(lq-\*(rq, respectively.
|
||||
.TP
|
||||
.B o
|
||||
Change the order in which the display is sorted. This command is not
|
||||
available on all systems. The sort key names vary from system to system
|
||||
but usually include: \*(lqcpu\*(rq, \*(lqres\*(rq, \*(lqsize\*(rq,
|
||||
\*(lqtime\*(rq. The default is cpu.
|
||||
.TP
|
||||
.B e
|
||||
Display a list of system errors (if any) generated by the last
|
||||
.BR k ill
|
||||
or
|
||||
.BR r enice
|
||||
command.
|
||||
.TP
|
||||
.B H
|
||||
Toggle the display of threads.
|
||||
.TP
|
||||
.B i
|
||||
(or
|
||||
.BR I )
|
||||
Toggle the display of idle processes.
|
||||
.TP
|
||||
.B j
|
||||
Toggle the display of
|
||||
.IR jail (8)
|
||||
ID.
|
||||
.TP
|
||||
.B J
|
||||
Display only processes owned by a specific jail (prompt for jail).
|
||||
If the jail specified is simply \*(lq+\*(rq, then processes belonging
|
||||
to all jails and the host will be displayed.
|
||||
This will also enable the display of JID.
|
||||
.TP
|
||||
.B P
|
||||
Toggle the display of per-CPU statistics.
|
||||
.TP
|
||||
.B t
|
||||
Toggle the display of the
|
||||
.I top
|
||||
process.
|
||||
.TP
|
||||
.B w
|
||||
Toggle the display of swap usage.
|
||||
.TP
|
||||
.B z
|
||||
Toggle the display of the system idle process.
|
||||
.SH "THE DISPLAY"
|
||||
The actual display varies depending on the specific variant of Unix
|
||||
that the machine is running. This description may not exactly match
|
||||
what is seen by top running on this particular machine. Differences
|
||||
are listed at the end of this manual entry.
|
||||
.PP
|
||||
The top few lines of the display show general information
|
||||
about the state of the system, including
|
||||
the last process id assigned to a process (on most systems),
|
||||
the three load averages,
|
||||
the current time,
|
||||
the number of existing processes,
|
||||
the number of processes in each state
|
||||
(sleeping, running, starting, zombies, and stopped),
|
||||
and a percentage of time spent in each of the processor states
|
||||
(user, nice, system, and idle).
|
||||
It also includes information about physical and virtual memory allocation.
|
||||
.PP
|
||||
The remainder of the screen displays information about individual
|
||||
processes. This display is similar in spirit to
|
||||
.IR ps (1)
|
||||
but it is not exactly the same. PID is the process id,
|
||||
JID, when displayed, is the
|
||||
.IR jail (8)
|
||||
ID corresponding to the process,
|
||||
USERNAME is the name of the process's owner (if
|
||||
.B \-u
|
||||
is specified, a UID column will be substituted for USERNAME),
|
||||
PRI is the current priority of the process,
|
||||
NICE is the nice amount (in the range \-20 to 20),
|
||||
SIZE is the total size of the process (text, data, and stack),
|
||||
RES is the current amount of resident memory,
|
||||
SWAP is the approximate amount of swap, if enabled
|
||||
(SIZE, RES and SWAP are given in kilobytes),
|
||||
STATE is the current state (one of \*(lqSTART\*(rq, \*(lqRUN\*(rq
|
||||
(shown as \*(lqCPUn\*(rq on SMP systems), \*(lqSLEEP\*(rq, \*(lqSTOP\*(rq,
|
||||
\*(lqZOMB\*(rq, \*(lqWAIT\*(rq, \*(lqLOCK\*(rq or the event on which the
|
||||
process waits),
|
||||
C is the processor number on which the process is executing
|
||||
(visible only on SMP systems),
|
||||
TIME is the number of system and user cpu seconds that the process has used,
|
||||
WCPU, when displayed, is the weighted cpu percentage (this is the same
|
||||
value that
|
||||
.IR ps (1)
|
||||
displays as CPU),
|
||||
CPU is the raw percentage and is the field that is sorted to determine
|
||||
the order of the processes, and
|
||||
COMMAND is the name of the command that the process is currently running
|
||||
(if the process is swapped out, this column is marked \*(lq<swapped>\*(rq).
|
||||
.SH NOTES
|
||||
If a process is in the \*(lqSLEEP\*(rq or \*(lqLOCK\*(rq state,
|
||||
the state column will report the name of the event or lock on which the
|
||||
process is waiting.
|
||||
Lock names are prefixed with an asterisk \*(lq*\*(rq while sleep events
|
||||
are not.
|
||||
.SH AUTHOR
|
||||
William LeFebvre, EECS Department, Northwestern University
|
||||
.SH ENVIRONMENT
|
||||
.DT
|
||||
TOP user-configurable defaults for options.
|
||||
.SH FILES
|
||||
.DT
|
||||
/dev/kmem kernel memory
|
||||
.br
|
||||
/dev/mem physical memory
|
||||
.br
|
||||
/etc/passwd used to map uid numbers to user names
|
||||
.br
|
||||
/boot/kernel/kernel system image
|
||||
.SH BUGS
|
||||
Don't shoot me, but the default for
|
||||
.B \-I
|
||||
has changed once again. So many people were confused by the fact that
|
||||
.I top
|
||||
wasn't showing them all the processes that I have decided to make the
|
||||
default behavior show idle processes, just like it did in version 2.
|
||||
But to appease folks who can't stand that behavior, I have added the
|
||||
ability to set \*(lqdefault\*(rq options in the environment variable
|
||||
.B TOP
|
||||
(see the OPTIONS section). Those who want the behavior that version
|
||||
3.0 had need only set the environment variable
|
||||
.B TOP
|
||||
to \*(lq\-I\*(rq.
|
||||
.PP
|
||||
The command name for swapped processes should be tracked down, but this
|
||||
would make the program run slower.
|
||||
.PP
|
||||
As with
|
||||
.IR ps (1),
|
||||
things can change while
|
||||
.I top
|
||||
is collecting information for an update. The picture it gives is only a
|
||||
close approximation to reality.
|
||||
.SH "SEE ALSO"
|
||||
kill(1),
|
||||
ps(1),
|
||||
stty(1),
|
||||
mem(4),
|
||||
renice(8)
|
||||
@ -1,6 +1,5 @@
|
||||
/*
|
||||
* Top users/processes display for Unix
|
||||
* Version 3
|
||||
*
|
||||
* This program may be freely redistributed,
|
||||
* but this entire comment MUST remain intact.
|
||||
@ -131,54 +130,20 @@ int wecare; /* 1 = enter it always, 0 = nice to have */
|
||||
/*
|
||||
* Get a userid->name mapping from the system.
|
||||
* If the passwd database is hashed (#define RANDOM_PW), we
|
||||
* just handle this uid. Otherwise we scan the passwd file
|
||||
* and cache any entries we pass over while looking.
|
||||
* just handle this uid.
|
||||
*/
|
||||
|
||||
int get_user(uid)
|
||||
|
||||
int uid;
|
||||
|
||||
int
|
||||
get_user(int uid)
|
||||
{
|
||||
struct passwd *pwd;
|
||||
|
||||
#ifdef RANDOM_PW
|
||||
/* no performance penalty for using getpwuid makes it easy */
|
||||
if ((pwd = getpwuid(uid)) != NULL)
|
||||
{
|
||||
return(enter_user(pwd->pw_uid, pwd->pw_name, 1));
|
||||
}
|
||||
#else
|
||||
|
||||
int from_start = 0;
|
||||
|
||||
/*
|
||||
* If we just called getpwuid each time, things would be very slow
|
||||
* since that just iterates through the passwd file each time. So,
|
||||
* we walk through the file instead (using getpwent) and cache each
|
||||
* entry as we go. Once the right record is found, we cache it and
|
||||
* return immediately. The next time we come in, getpwent will get
|
||||
* the next record. In theory, we never have to read the passwd file
|
||||
* a second time (because we cache everything we read). But in
|
||||
* practice, the cache may not be large enough, so if we don't find
|
||||
* it the first time we have to scan the file a second time. This
|
||||
* is not very efficient, but it will do for now.
|
||||
*/
|
||||
|
||||
while (from_start++ < 2)
|
||||
{
|
||||
while ((pwd = getpwent()) != NULL)
|
||||
{
|
||||
if (pwd->pw_uid == uid)
|
||||
{
|
||||
return(enter_user(pwd->pw_uid, pwd->pw_name, 1));
|
||||
}
|
||||
(void) enter_user(pwd->pw_uid, pwd->pw_name, 0);
|
||||
}
|
||||
/* try again */
|
||||
setpwent();
|
||||
}
|
||||
#endif
|
||||
/* if we can't find the name at all, then use the uid as the name */
|
||||
return(enter_user(uid, itoa7(uid), 1));
|
||||
}
|
||||
|
||||
@ -20,4 +20,14 @@ void init_hash(void);
|
||||
char *username(int uid);
|
||||
int userid(char *username);
|
||||
|
||||
/*
|
||||
* "Table_size" defines the size of the hash tables used to map uid to
|
||||
* username. The number of users in /etc/passwd CANNOT be greater than
|
||||
* this number. If the error message "table overflow: too many users"
|
||||
* is printed by top, then "Table_size" needs to be increased. Things will
|
||||
* work best if the number is a prime number that is about twice the number
|
||||
* of lines in /etc/passwd.
|
||||
*/
|
||||
#define Table_size 20011
|
||||
|
||||
#endif /* USERNAME_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user