Index: head/usr.bin/top/top.local.hs =================================================================== --- head/usr.bin/top/top.local.hs (revision 333945) +++ head/usr.bin/top/top.local.hs (nonexistent) @@ -1,68 +0,0 @@ -/* - * Top - a top users display for Berkeley Unix - * - * Definitions for things that might vary between installations. - */ - -/* - * The space command forces an immediate update. Sometimes, on loaded - * systems, this update will take a significant period of time (because all - * the output is buffered). So, if the short-term load average is above - * "LoadMax", then top will put the cursor home immediately after the space - * is pressed before the next update is attempted. This serves as a visual - * acknowledgement of the command. On Suns, "LoadMax" will get multiplied by - * "FSCALE" before being compared to avenrun[0]. Therefore, "LoadMax" - * should always be specified as a floating point number. - */ -#ifndef LoadMax -#define LoadMax %LoadMax% -#endif - -/* - * "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. - */ -#ifndef Table_size -#define Table_size %TableSize% -#endif - -/* - * "Nominal_TOPN" is used as the default TOPN when Default_TOPN is Infinity - * and the output is a dumb terminal. If we didn't do this, then - * installations who use a default TOPN of Infinity will get every - * process in the system when running top on a dumb terminal (or redirected - * to a file). Note that Nominal_TOPN is a default: it can still be - * overridden on the command line, even with the value "infinity". - */ -#ifndef Nominal_TOPN -#define Nominal_TOPN %NominalTopn% -#endif - -#ifndef Default_TOPN -#define Default_TOPN %topn% -#endif - -#ifndef Default_DELAY -#define Default_DELAY %delay% -#endif - -/* - * If the local system's getpwnam interface uses random access to retrieve - * a record (i.e.: 4.3 systems, Sun "yellow pages"), then defining - * RANDOM_PW will take advantage of that fact. If RANDOM_PW is defined, - * then getpwnam is used and the result is cached. If not, then getpwent - * is used to read and cache the password entries sequentially until the - * desired one is found. - * - * We initially set RANDOM_PW to something which is controllable by the - * Configure script. Then if its value is 0, we undef it. - */ - -#define RANDOM_PW %random% -#if RANDOM_PW == 0 -#undef RANDOM_PW -#endif Property changes on: head/usr.bin/top/top.local.hs ___________________________________________________________________ Deleted: svn:keywords ## -1 +0,0 ## -FreeBSD=%H \ No newline at end of property Deleted: svn:mime-type ## -1 +0,0 ## -text/plain \ No newline at end of property Index: head/usr.bin/top/top.xs =================================================================== --- head/usr.bin/top/top.xs (revision 333945) +++ head/usr.bin/top/top.xs (nonexistent) @@ -1,459 +0,0 @@ -.\" NOTE: changes to the manual page for "top" should be made in the -.\" file "top.X" and NOT in the file "top.1". -.\" $FreeBSD$ -.nr N %topn% -.nr D %delay% -.TH TOP 1 Local -.UC 4 -.SH NAME -top \- display and update information about the top cpu processes -.SH SYNOPSIS -.B top -[ -.B \-abCHIijnPqStuvwz -] [ -.BI \-d count -] [ -.BI \-m io | cpu -] [ -.BI \-o field -] [ -.BI \-s time -] [ -.BI \-J jail -] [ -.BI \-U username -] [ -.I number -] -.SH DESCRIPTION -.\" This defines appropriate quote strings for nroff and troff -.ds lq \&" -.ds rq \&" -.if t .ds lq `` -.if t .ds rq '' -.\" Just in case these number registers aren't set yet... -.if \nN==0 .nr N 10 -.if \nD==0 .nr D 2 -.I Top -displays the top -.if !\nN==-1 \nN -processes on the system and periodically updates this information. -.if \nN==-1 \ -\{\ -If standard output is an intelligent terminal (see below) then -as many processes as will fit on the terminal screen are displayed -by default. Otherwise, a good number of them are shown (around 20). -.\} -Raw cpu percentage is used to rank the processes. If -.I number -is given, then the top -.I number -processes will be displayed instead of the default. -.PP -.I Top -makes a distinction between terminals that support advanced capabilities -and those that do not. This -distinction affects the choice of defaults for certain options. In the -remainder of this document, an \*(lqintelligent\*(rq terminal is one that -supports cursor addressing, clear screen, and clear to end of line. -Conversely, a \*(lqdumb\*(rq terminal is one that does not support such -features. If the output of -.I top -is redirected to a file, it acts as if it were being run on a dumb -terminal. -.SH OPTIONS -.TP -.B \-C -Toggle CPU display mode. -By default top displays the weighted CPU percentage in the WCPU column -(this is the same value that -.IR ps (1) -displays as CPU). -Each time -.B \-C -flag is passed it toggles between \*(lqraw cpu\*(rq mode -and \*(lqweighted cpu\*(rq mode, showing the \*(lqCPU\*(rq or -the \*(lqWCPU\*(rq column respectively. -.TP -.B \-S -Show system processes in the display. Normally, system processes such as -the pager and the swapper are not shown. This option makes them visible. -.TP -.B \-a -Display command names derived from the argv[] vector, rather than real -executable name. It's useful when you want to watch applications, that -puts their status information there. If the real name differs from argv[0], -it will be displayed in parenthesis. -.TP -.B \-b -Use \*(lqbatch\*(rq mode. In this mode, all input from the terminal is -ignored. Interrupt characters (such as ^C and ^\e) still have an effect. -This is the default on a dumb terminal, or when the output is not a terminal. -.TP -.B \-H -Display each thread for a multithreaded process individually. -By default a single summary line is displayed for each process. -.TP -.B \-i -Use \*(lqinteractive\*(rq mode. In this mode, any input is immediately -read for processing. See the section on \*(lqInteractive Mode\*(rq -for an explanation of -which keys perform what functions. After the command is processed, the -screen will immediately be updated, even if the command was not -understood. This mode is the default when standard output is an -intelligent terminal. -.TP -.B \-I -Do not display idle processes. -By default, top displays both active and idle processes. -.TP -.B \-j -Display the -.IR jail (8) -ID. -.TP -.B \-t -Do not display the -.I top -process. -.TP -.BI \-m display -Display either 'cpu' or 'io' statistics. Default is 'cpu'. -.TP -.B \-n -Use \*(lqnon-interactive\*(rq mode. This is identical to \*(lqbatch\*(rq -mode. -.TP -.B \-P -Display per-cpu CPU usage statistics. -.TP -.B \-q -Renice -.I top -to -20 so that it will run faster. This can be used when the system is -being very sluggish to improve the possibility of discovering the problem. -This option can only be used by root. -.TP -.B \-u -Do not take the time to map uid numbers to usernames. Normally, -.I top -will read as much of the file \*(lq/etc/passwd\*(rq as is necessary to map -all the user id numbers it encounters into login names. This option -disables all that, while possibly decreasing execution time. The uid -numbers are displayed instead of the names. -.TP -.B \-v -Write version number information to stderr then exit immediately. -No other processing takes place when this option is used. To see current -revision information while top is running, use the help command \*(lq?\*(rq. -.TP -.B \-w -Display approximate swap usage for each process. -.TP -.B \-z -Do not display the system idle process. -.TP -.BI \-d count -Show only -.I count -displays, then exit. A display is considered to be one update of the -screen. This option allows the user to select the number of displays he -wants to see before -.I top -automatically exits. For intelligent terminals, no upper limit -is set. The default is 1 for dumb terminals. -.TP -.BI \-s time -Set the delay between screen updates to -.I time -seconds. The default delay between updates is \nD seconds. -.TP -.BI \-o field -Sort the process display area on the specified field. The field name -is the name of the column as seen in the output, but in lower case: -\*(lqcpu\*(lq, \*(rqsize\*(lq, \*(rqres\*(lq, \*(rqtime\*(lq, -\*(rqpri\*(lq, \*(rqthreads\*(lq, \*(lqtotal\*(lq, \*(rqread\*(lq, -\*(rqwrite\*(lq, \*(rqfault\*(lq, \*(rqvcsw\*(lq, \*(rqivcsw\*(lq, -\*(lqjid\*(lq, \*(rqswap\*(lq or \*(rqpid\*(lq. -.TP -.BI \-J jail -Show only those processes owned by -.IR jail . -This may be either the -.B jid -or -.B name -of the jail. -Use -.B 0 -to limit to host processes. -Using this option implies the -.B \-j -flag. -.PP -.BI \-U username -Show only those processes owned by -.IR username . -This option currently only accepts usernames and will not understand -uid numbers. -.PP -Both -.I count -and -.I number -fields can be specified as \*(lqinfinite\*(rq, indicating that they can -stretch as far as possible. This is accomplished by using any proper -prefix of the keywords -\*(lqinfinity\*(rq, -\*(lqmaximum\*(rq, -or -\*(lqall\*(rq. -The default for -.I count -on an intelligent terminal is, in fact, -.BI infinity . -.PP -The environment variable -.B TOP -is examined for options before the command line is scanned. This enables -a user to set his or her own defaults. The number of processes to display -can also be specified in the environment variable -.BR TOP . -The options -.BR \-a , -.BR \-C , -.BR \-H , -.BR \-I , -.BR \-j , -.BR \-P , -.BR \-S , -.BR \-t , -.BR \-u , -.BR \-w , -and -.B \-z -are actually toggles. A second specification of any of these options -will negate the first. Thus a user who has the environment variable -.B TOP -set to \*(lq\-I\*(rq may use the command \*(lqtop \-I\*(rq to see idle processes. -.SH "INTERACTIVE MODE" -When -.I top -is running in \*(lqinteractive mode\*(rq, it reads commands from the -terminal and acts upon them accordingly. In this mode, the terminal is -put in \*(lqCBREAK\*(rq, so that a character will be -processed as soon as it is typed. Almost always, a key will be -pressed when -.I top -is between displays; that is, while it is waiting for -.I time -seconds to elapse. If this is the case, the command will be -processed and the display will be updated immediately thereafter -(reflecting any changes that the command may have specified). This -happens even if the command was incorrect. If a key is pressed while -.I top -is in the middle of updating the display, it will finish the update and -then process the command. Some commands require additional information, -and the user will be prompted accordingly. While typing this information -in, the user's erase and kill keys (as set up by the command -.IR stty ) -are recognized, and a newline terminates the input. -.PP -These commands are currently recognized (^L refers to control-L): -.TP -.B ^L -Redraw the screen. -.IP "\fBh\fP\ or\ \fB?\fP" -Display a summary of the commands (help screen). Version information -is included in this display. -.TP -.B q -Quit -.IR top. -.TP -.B d -Change the number of displays to show (prompt for new number). -Remember that the next display counts as one, so typing -.B d1 -will make -.I top -show one final display and then immediately exit. -.TP -.B m -Toggle the display between 'cpu' and 'io' modes. -.TP -.B n or # -Change the number of processes to display (prompt for new number). -.TP -.B s -Change the number of seconds to delay between displays -(prompt for new number). -.TP -.B S -Toggle the display of system processes. -.TP -.B a -Toggle the display of process titles. -.TP -.B k -Send a signal (\*(lqkill\*(rq by default) to a list of processes. This -acts similarly to the command -.IR kill (1)). -.TP -.B r -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\*(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) Property changes on: head/usr.bin/top/top.xs ___________________________________________________________________ Deleted: svn:keywords ## -1 +0,0 ## -FreeBSD=%H \ No newline at end of property Deleted: svn:mime-type ## -1 +0,0 ## -text/plain \ No newline at end of property Index: head/usr.bin/top/Makefile =================================================================== --- head/usr.bin/top/Makefile (revision 333945) +++ head/usr.bin/top/Makefile (revision 333946) @@ -1,30 +1,19 @@ # $FreeBSD$ PROG= top SRCS= commands.c display.c machine.c screen.c top.c \ username.c utils.c SRCS+= sigdesc.h top.local.h CFLAGS+= -I ${.OBJDIR} MAN= top.1 WARNS?= 1 LIBADD= ncursesw m kvm jail CLEANFILES= sigdesc.h SIGNAL_H= ${SRCTOP}/sys/sys/signal.h sigdesc.h: sigconv.awk ${SIGNAL_H} awk -f ${SRCTOP}/usr.bin/top/sigconv.awk < ${SIGNAL_H} > ${.TARGET} -.SUFFIXES: .xs .x .hs .h -.xs.x .hs.h: - @${ECHO} Making ${.TARGET} from ${.IMPSRC} - @sed -e's,%LoadMax%,5.0,g' \ - -e's,%TableSize%,20011,g' \ - -e's,%NominalTopn%,18,g' \ - -e's,%topn%,-1,g' \ - -e's,%delay%,2,g' \ - -e's,%random%,1,g' \ - ${.IMPSRC} > ${.TARGET} - .include Index: head/usr.bin/top/top.c =================================================================== --- head/usr.bin/top/top.c (revision 333945) +++ head/usr.bin/top/top.c (revision 333946) @@ -1,1265 +1,1257 @@ char *copyright = "Copyright (c) 1984 through 1996, William LeFebvre"; /* * Top users/processes display for Unix * Version 3 * * This program may be freely redistributed, * but this entire comment MUST remain intact. * * Copyright (c) 1984, 1989, William LeFebvre, Rice University * Copyright (c) 1989 - 1994, William LeFebvre, Northwestern University * Copyright (c) 1994, 1995, William LeFebvre, Argonne National Laboratory * Copyright (c) 1996, William LeFebvre, Group sys Consulting * * $FreeBSD$ */ /* * See the file "Changes" for information on version-to-version changes. */ /* * This file contains "main" and other high-level routines. */ /* * The following preprocessor variables, when defined, are used to * distinguish between different Unix implementations: * * SIGHOLD - use SVR4 sighold function when defined * SIGRELSE - use SVR4 sigrelse function when defined * FD_SET - macros FD_SET and FD_ZERO are used when defined */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* includes specific to top */ #include "commands.h" #include "display.h" /* interface to display package */ #include "screen.h" /* interface to screen package */ #include "top.h" #include "top.local.h" #include "boolean.h" #include "machine.h" #include "utils.h" #include "username.h" /* Size of the stdio buffer given to stdout */ #define Buffersize 2048 typedef void sigret_t; /* The buffer that stdio will use */ char stdoutbuf[Buffersize]; /* build Signal masks */ #define Smask(s) (1 << ((s) - 1)) /* for getopt: */ extern int optind; extern char *optarg; /* imported from screen.c */ extern int overstrike; static int fmt_flags = 0; int pcpu_stats = No; /* signal handling routines */ sigret_t leave(); sigret_t tstop(); sigret_t top_winch(int); volatile sig_atomic_t leaveflag; volatile sig_atomic_t tstopflag; volatile sig_atomic_t winchflag; /* internal routines */ void quit(); /* values which need to be accessed by signal handlers */ static int max_topn; /* maximum displayable processes */ /* miscellaneous things */ struct process_select ps; char *myname = "top"; jmp_buf jmp_int; /* routines that don't return int */ char *username(); extern int (*compares[])(); time_t time(); caddr_t get_process_info(struct system_info *si, struct process_select *sel, int (*compare)(const void *, const void *)); /* different routines for displaying the user's identification */ /* (values assigned to get_userid) */ char *username(); char *itoa7(); /* pointers to display routines */ void (*d_loadave)(int mpid, double *avenrun) = i_loadave; void (*d_procstates)(int total, int *brkdn) = i_procstates; void (*d_cpustates)(int *states) = i_cpustates; void (*d_memory)(int *stats) = i_memory; void (*d_arc)(int *stats) = i_arc; void (*d_carc)(int *stats) = i_carc; void (*d_swap)(int *stats) = i_swap; void (*d_message)(void) = i_message; void (*d_header)(char *text) = i_header; void (*d_process)(int line, char *thisline) = i_process; void reset_display(void); static void reset_uids() { for (size_t i = 0; i < TOP_MAX_UIDS; ++i) ps.uid[i] = -1; } static int add_uid(int uid) { size_t i = 0; /* Add the uid if there's room */ for (; i < TOP_MAX_UIDS; ++i) { if (ps.uid[i] == -1 || ps.uid[i] == uid) { ps.uid[i] = uid; break; } } return (i == TOP_MAX_UIDS); } static void rem_uid(int uid) { size_t i = 0; size_t where = TOP_MAX_UIDS; /* Look for the user to remove - no problem if it's not there */ for (; i < TOP_MAX_UIDS; ++i) { if (ps.uid[i] == -1) break; if (ps.uid[i] == uid) where = i; } /* Make sure we don't leave a hole in the middle */ if (where != TOP_MAX_UIDS) { ps.uid[where] = ps.uid[i-1]; ps.uid[i-1] = -1; } } static int handle_user(char *buf, size_t buflen) { int rc = 0; int uid = -1; char *buf2 = buf; new_message(MT_standout, "Username to show (+ for all): "); if (readline(buf, buflen, No) <= 0) { clear_message(); return rc; } if (buf[0] == '+' || buf[0] == '-') { if (buf[1] == '\0') { reset_uids(); goto end; } else ++buf2; } if ((uid = userid(buf2)) == -1) { new_message(MT_standout, " %s: unknown user", buf2); rc = 1; goto end; } if (buf2 == buf) { reset_uids(); ps.uid[0] = uid; goto end; } if (buf[0] == '+') { if (add_uid(uid)) { new_message(MT_standout, " too many users, reset with '+'"); rc = 1; goto end; } } else rem_uid(uid); end: putchar('\r'); return rc; } int main(argc, argv) int argc; char *argv[]; { int i; int active_procs; int change; struct system_info system_info; struct statics statics; caddr_t processes; static char tempbuf1[50]; static char tempbuf2[50]; int old_sigmask; /* only used for BSD-style signals */ - int topn = Default_TOPN; + int topn = Infinity; int delay = Default_DELAY; int displays = 0; /* indicates unspecified */ int sel_ret = 0; time_t curr_time; char *(*get_userid)() = username; char *uname_field = "USERNAME"; char *header_text; char *env_top; char **preset_argv; int preset_argc = 0; char **av; int ac; char dostates = No; char do_unames = Yes; char interactive = Maybe; char warnings = 0; -#if Default_TOPN == Infinity char topn_specified = No; -#endif char ch; char *iptr; char no_command = 1; struct timeval timeout; char *order_name = NULL; int order_index = 0; fd_set readfds; static char command_chars[] = "\f qh?en#sdkriIutHmSCajzPJwo"; /* these defines enumerate the "strchr"s of the commands in command_chars */ #define CMD_redraw 0 #define CMD_update 1 #define CMD_quit 2 #define CMD_help1 3 #define CMD_help2 4 #define CMD_OSLIMIT 4 /* terminals with OS can only handle commands */ #define CMD_errors 5 /* less than or equal to CMD_OSLIMIT */ #define CMD_number1 6 #define CMD_number2 7 #define CMD_delay 8 #define CMD_displays 9 #define CMD_kill 10 #define CMD_renice 11 #define CMD_idletog 12 #define CMD_idletog2 13 #define CMD_user 14 #define CMD_selftog 15 #define CMD_thrtog 16 #define CMD_viewtog 17 #define CMD_viewsys 18 #define CMD_wcputog 19 #define CMD_showargs 20 #define CMD_jidtog 21 #define CMD_kidletog 22 #define CMD_pcputog 23 #define CMD_jail 24 #define CMD_swaptog 25 #define CMD_order 26 /* set the buffer for stdout */ #ifdef DEBUG extern FILE *debug; debug = fopen("debug.run", "w"); setbuffer(stdout, NULL, 0); #else setbuffer(stdout, stdoutbuf, Buffersize); #endif /* get our name */ if (argc > 0) { if ((myname = strrchr(argv[0], '/')) == 0) { myname = argv[0]; } else { myname++; } } /* initialize some selection options */ ps.idle = Yes; ps.self = -1; ps.system = No; reset_uids(); ps.thread = No; ps.wcpu = 1; ps.jid = -1; ps.jail = No; ps.swap = No; ps.kidle = Yes; ps.command = NULL; /* get preset options from the environment */ if ((env_top = getenv("TOP")) != NULL) { av = preset_argv = argparse(env_top, &preset_argc); ac = preset_argc; /* set the dummy argument to an explanatory message, in case getopt encounters a bad argument */ preset_argv[0] = "while processing environment"; } /* process options */ do { /* if we're done doing the presets, then process the real arguments */ if (preset_argc == 0) { ac = argc; av = argv; /* this should keep getopt happy... */ optind = 1; } while ((i = getopt(ac, av, "CSIHPabijJ:nquvzs:d:U:m:o:tw")) != EOF) { switch(i) { case 'v': /* show version number */ fprintf(stderr, "%s: version FreeBSD\n", myname); exit(1); break; case 'u': /* toggle uid/username display */ do_unames = !do_unames; break; case 'U': /* display only username's processes */ if ((ps.uid[0] = userid(optarg)) == -1) { fprintf(stderr, "%s: unknown user\n", optarg); exit(1); } break; case 'S': /* show system processes */ ps.system = !ps.system; break; case 'I': /* show idle processes */ ps.idle = !ps.idle; break; case 'i': /* go interactive regardless */ interactive = Yes; break; case 'n': /* batch, or non-interactive */ case 'b': interactive = No; break; case 'a': fmt_flags ^= FMT_SHOWARGS; break; case 'd': /* number of displays to show */ if ((i = atoiwi(optarg)) == Invalid || i == 0) { fprintf(stderr, "%s: warning: display count should be positive -- option ignored\n", myname); warnings++; } else { displays = i; } break; case 's': if ((delay = atoi(optarg)) < 0 || (delay == 0 && getuid() != 0)) { fprintf(stderr, "%s: warning: seconds delay should be positive -- using default\n", myname); delay = Default_DELAY; warnings++; } break; case 'q': /* be quick about it */ /* only allow this if user is really root */ if (getuid() == 0) { /* be very un-nice! */ (void) nice(-20); } else { fprintf(stderr, "%s: warning: `-q' option can only be used by root\n", myname); warnings++; } break; case 'm': /* select display mode */ if (strcmp(optarg, "io") == 0) { displaymode = DISP_IO; } else if (strcmp(optarg, "cpu") == 0) { displaymode = DISP_CPU; } else { fprintf(stderr, "%s: warning: `-m' option can only take args " "'io' or 'cpu'\n", myname); exit(1); } break; case 'o': /* select sort order */ order_name = optarg; break; case 't': ps.self = (ps.self == -1) ? getpid() : -1; break; case 'C': ps.wcpu = !ps.wcpu; break; case 'H': ps.thread = !ps.thread; break; case 'j': ps.jail = !ps.jail; break; case 'J': /* display only jail's processes */ if ((ps.jid = jail_getid(optarg)) == -1) { fprintf(stderr, "%s: unknown jail\n", optarg); exit(1); } ps.jail = 1; break; case 'P': pcpu_stats = !pcpu_stats; break; case 'w': ps.swap = 1; break; case 'z': ps.kidle = !ps.kidle; break; default: fprintf(stderr, "Usage: %s [-abCHIijnPqStuvwz] [-d count] [-m io | cpu] [-o field] [-s time]\n" " [-J jail] [-U username] [number]\n", myname); exit(1); } } /* get count of top processes to display (if any) */ if (optind < ac) { if ((topn = atoiwi(av[optind])) == Invalid) { fprintf(stderr, "%s: warning: process display count should be non-negative -- using default\n", myname); warnings++; } -#if Default_TOPN == Infinity else { topn_specified = Yes; } -#endif } /* tricky: remember old value of preset_argc & set preset_argc = 0 */ i = preset_argc; preset_argc = 0; /* repeat only if we really did the preset arguments */ } while (i != 0); /* set constants for username/uid display correctly */ if (!do_unames) { uname_field = " UID "; get_userid = itoa7; } /* initialize the kernel memory interface */ if (machine_init(&statics) == -1) { exit(1); } /* determine sorting order index, if necessary */ if (order_name != NULL) { if ((order_index = string_index(order_name, statics.order_names)) == -1) { char **pp; fprintf(stderr, "%s: '%s' is not a recognized sorting order.\n", myname, order_name); fprintf(stderr, "\tTry one of these:"); pp = statics.order_names; while (*pp != NULL) { fprintf(stderr, " %s", *pp++); } fputc('\n', stderr); exit(1); } } /* initialize termcap */ init_termcap(interactive); /* get the string to use for the process area header */ header_text = format_header(uname_field); /* initialize display interface */ if ((max_topn = display_init(&statics)) == -1) { fprintf(stderr, "%s: can't allocate sufficient memory\n", myname); exit(4); } /* print warning if user requested more processes than we can display */ if (topn > max_topn) { fprintf(stderr, "%s: warning: this terminal can only display %d processes.\n", myname, max_topn); warnings++; } /* adjust for topn == Infinity */ if (topn == Infinity) { /* * For smart terminals, infinity really means everything that can * be displayed, or Largest. * On dumb terminals, infinity means every process in the system! * We only really want to do that if it was explicitly specified. * This is always the case when "Default_TOPN != Infinity". But if * topn wasn't explicitly specified and we are on a dumb terminal * and the default is Infinity, then (and only then) we use * "Nominal_TOPN" instead. */ -#if Default_TOPN == Infinity topn = smart_terminal ? Largest : (topn_specified ? Largest : Nominal_TOPN); -#else - topn = Largest; -#endif } /* set header display accordingly */ display_header(topn > 0); /* determine interactive state */ if (interactive == Maybe) { interactive = smart_terminal; } /* if # of displays not specified, fill it in */ if (displays == 0) { displays = smart_terminal ? Infinity : 1; } /* hold interrupt signals while setting up the screen and the handlers */ #ifdef SIGHOLD sighold(SIGINT); sighold(SIGQUIT); sighold(SIGTSTP); #else old_sigmask = sigblock(Smask(SIGINT) | Smask(SIGQUIT) | Smask(SIGTSTP)); #endif init_screen(); (void) signal(SIGINT, leave); (void) signal(SIGQUIT, leave); (void) signal(SIGTSTP, tstop); (void) signal(SIGWINCH, top_winch); #ifdef SIGRELSE sigrelse(SIGINT); sigrelse(SIGQUIT); sigrelse(SIGTSTP); #else (void) sigsetmask(old_sigmask); #endif if (warnings) { fputs("....", stderr); fflush(stderr); /* why must I do this? */ sleep((unsigned)(3 * warnings)); fputc('\n', stderr); } restart: /* * main loop -- repeat while display count is positive or while it * indicates infinity (by being -1) */ while ((displays == -1) || (displays-- > 0)) { int (*compare)(); /* get the current stats */ get_system_info(&system_info); compare = compares[order_index]; /* get the current set of processes */ processes = get_process_info(&system_info, &ps, compare); /* display the load averages */ (*d_loadave)(system_info.last_pid, system_info.load_avg); /* display the current time */ /* this method of getting the time SHOULD be fairly portable */ time(&curr_time); i_uptime(&system_info.boottime, &curr_time); i_timeofday(&curr_time); /* display process state breakdown */ (*d_procstates)(system_info.p_total, system_info.procstates); /* display the cpu state percentage breakdown */ if (dostates) /* but not the first time */ { (*d_cpustates)(system_info.cpustates); } else { /* we'll do it next time */ if (smart_terminal) { z_cpustates(); } else { putchar('\n'); } dostates = Yes; } /* display memory stats */ (*d_memory)(system_info.memory); (*d_arc)(system_info.arc); (*d_carc)(system_info.carc); /* display swap stats */ (*d_swap)(system_info.swap); /* handle message area */ (*d_message)(); /* update the header area */ (*d_header)(header_text); if (topn > 0) { /* determine number of processes to actually display */ /* this number will be the smallest of: active processes, number user requested, number current screen accomodates */ active_procs = system_info.P_ACTIVE; if (active_procs > topn) { active_procs = topn; } if (active_procs > max_topn) { active_procs = max_topn; } /* now show the top "n" processes. */ for (i = 0; i < active_procs; i++) { (*d_process)(i, format_next_process(processes, get_userid, fmt_flags)); } } else { i = 0; } /* do end-screen processing */ u_endscreen(i); /* now, flush the output buffer */ if (fflush(stdout) != 0) { new_message(MT_standout, " Write error on stdout"); putchar('\r'); quit(1); /*NOTREACHED*/ } /* only do the rest if we have more displays to show */ if (displays) { /* switch out for new display on smart terminals */ if (smart_terminal) { if (overstrike) { reset_display(); } else { d_loadave = u_loadave; d_procstates = u_procstates; d_cpustates = u_cpustates; d_memory = u_memory; d_arc = u_arc; d_carc = u_carc; d_swap = u_swap; d_message = u_message; d_header = u_header; d_process = u_process; } } no_command = Yes; if (!interactive) { sleep(delay); if (leaveflag) { end_screen(); exit(0); } } else while (no_command) { /* assume valid command unless told otherwise */ no_command = No; /* set up arguments for select with timeout */ FD_ZERO(&readfds); FD_SET(0, &readfds); /* for standard input */ timeout.tv_sec = delay; timeout.tv_usec = 0; if (leaveflag) { end_screen(); exit(0); } if (tstopflag) { /* move to the lower left */ end_screen(); fflush(stdout); /* default the signal handler action */ (void) signal(SIGTSTP, SIG_DFL); /* unblock the signal and send ourselves one */ #ifdef SIGRELSE sigrelse(SIGTSTP); #else (void) sigsetmask(sigblock(0) & ~(1 << (SIGTSTP - 1))); #endif (void) kill(0, SIGTSTP); /* reset the signal handler */ (void) signal(SIGTSTP, tstop); /* reinit screen */ reinit_screen(); reset_display(); tstopflag = 0; goto restart; } if (winchflag) { /* reascertain the screen dimensions */ get_screensize(); /* tell display to resize */ max_topn = display_resize(); /* reset the signal handler */ (void) signal(SIGWINCH, top_winch); reset_display(); winchflag = 0; goto restart; } /* wait for either input or the end of the delay period */ sel_ret = select(2, &readfds, NULL, NULL, &timeout); if (sel_ret < 0 && errno != EINTR) quit(0); if (sel_ret > 0) { int newval; char *errmsg; /* something to read -- clear the message area first */ clear_message(); /* now read it and convert to command strchr */ /* (use "change" as a temporary to hold strchr) */ if (read(0, &ch, 1) != 1) { /* read error: either 0 or -1 */ new_message(MT_standout, " Read error on stdin"); putchar('\r'); quit(1); /*NOTREACHED*/ } if ((iptr = strchr(command_chars, ch)) == NULL) { if (ch != '\r' && ch != '\n') { /* illegal command */ new_message(MT_standout, " Command not understood"); } putchar('\r'); no_command = Yes; } else { change = iptr - command_chars; if (overstrike && change > CMD_OSLIMIT) { /* error */ new_message(MT_standout, " Command cannot be handled by this terminal"); putchar('\r'); no_command = Yes; } else switch(change) { case CMD_redraw: /* redraw screen */ reset_display(); break; case CMD_update: /* merely update display */ /* is the load average high? */ if (system_info.load_avg[0] > LoadMax) { /* yes, go home for visual feedback */ go_home(); fflush(stdout); } break; case CMD_quit: /* quit */ quit(0); /*NOTREACHED*/ break; case CMD_help1: /* help */ case CMD_help2: reset_display(); top_clear(); show_help(); top_standout("Hit any key to continue: "); fflush(stdout); (void) read(0, &ch, 1); break; case CMD_errors: /* show errors */ if (error_count() == 0) { new_message(MT_standout, " Currently no errors to report."); putchar('\r'); no_command = Yes; } else { reset_display(); top_clear(); show_errors(); top_standout("Hit any key to continue: "); fflush(stdout); (void) read(0, &ch, 1); } break; case CMD_number1: /* new number */ case CMD_number2: new_message(MT_standout, "Number of processes to show: "); newval = readline(tempbuf1, 8, Yes); if (newval > -1) { if (newval > max_topn) { new_message(MT_standout | MT_delayed, " This terminal can only display %d processes.", max_topn); putchar('\r'); } if (newval == 0) { /* inhibit the header */ display_header(No); } else if (newval > topn && topn == 0) { /* redraw the header */ display_header(Yes); d_header = i_header; } topn = newval; } break; case CMD_delay: /* new seconds delay */ new_message(MT_standout, "Seconds to delay: "); if ((i = readline(tempbuf1, 8, Yes)) > -1) { if ((delay = i) == 0 && getuid() != 0) { delay = 1; } } clear_message(); break; case CMD_displays: /* change display count */ new_message(MT_standout, "Displays to show (currently %s): ", displays == -1 ? "infinite" : itoa(displays)); if ((i = readline(tempbuf1, 10, Yes)) > 0) { displays = i; } else if (i == 0) { quit(0); } clear_message(); break; case CMD_kill: /* kill program */ new_message(0, "kill "); if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) { if ((errmsg = kill_procs(tempbuf2)) != NULL) { new_message(MT_standout, "%s", errmsg); putchar('\r'); no_command = Yes; } } else { clear_message(); } break; case CMD_renice: /* renice program */ new_message(0, "renice "); if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) { if ((errmsg = renice_procs(tempbuf2)) != NULL) { new_message(MT_standout, "%s", errmsg); putchar('\r'); no_command = Yes; } } else { clear_message(); } break; case CMD_idletog: case CMD_idletog2: ps.idle = !ps.idle; new_message(MT_standout | MT_delayed, " %sisplaying idle processes.", ps.idle ? "D" : "Not d"); putchar('\r'); break; case CMD_selftog: ps.self = (ps.self == -1) ? getpid() : -1; new_message(MT_standout | MT_delayed, " %sisplaying self.", (ps.self == -1) ? "D" : "Not d"); putchar('\r'); break; case CMD_user: if (handle_user(tempbuf2, sizeof(tempbuf2))) no_command = Yes; break; case CMD_thrtog: ps.thread = !ps.thread; new_message(MT_standout | MT_delayed, " Displaying threads %s", ps.thread ? "separately" : "as a count"); header_text = format_header(uname_field); reset_display(); putchar('\r'); break; case CMD_wcputog: ps.wcpu = !ps.wcpu; new_message(MT_standout | MT_delayed, " Displaying %s CPU", ps.wcpu ? "weighted" : "raw"); header_text = format_header(uname_field); reset_display(); putchar('\r'); break; case CMD_viewtog: if (++displaymode == DISP_MAX) displaymode = 0; header_text = format_header(uname_field); display_header(Yes); d_header = i_header; reset_display(); break; case CMD_viewsys: ps.system = !ps.system; break; case CMD_showargs: fmt_flags ^= FMT_SHOWARGS; break; case CMD_order: new_message(MT_standout, "Order to sort: "); if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) { if ((i = string_index(tempbuf2, statics.order_names)) == -1) { new_message(MT_standout, " %s: unrecognized sorting order", tempbuf2); no_command = Yes; } else { order_index = i; } putchar('\r'); } else { clear_message(); } break; case CMD_jidtog: ps.jail = !ps.jail; new_message(MT_standout | MT_delayed, " %sisplaying jail ID.", ps.jail ? "D" : "Not d"); header_text = format_header(uname_field); reset_display(); putchar('\r'); break; case CMD_jail: new_message(MT_standout, "Jail to show (+ for all): "); if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) { if (tempbuf2[0] == '+' && tempbuf2[1] == '\0') { ps.jid = -1; } else if ((i = jail_getid(tempbuf2)) == -1) { new_message(MT_standout, " %s: unknown jail", tempbuf2); no_command = Yes; } else { ps.jid = i; } if (ps.jail == 0) { ps.jail = 1; new_message(MT_standout | MT_delayed, " Displaying jail " "ID."); header_text = format_header(uname_field); reset_display(); } putchar('\r'); } else { clear_message(); } break; case CMD_kidletog: ps.kidle = !ps.kidle; new_message(MT_standout | MT_delayed, " %sisplaying system idle process.", ps.kidle ? "D" : "Not d"); putchar('\r'); break; case CMD_pcputog: pcpu_stats = !pcpu_stats; new_message(MT_standout | MT_delayed, " Displaying %sCPU statistics.", pcpu_stats ? "per-" : "global "); toggle_pcpustats(); max_topn = display_updatecpus(&statics); reset_display(); putchar('\r'); break; case CMD_swaptog: ps.swap = !ps.swap; new_message(MT_standout | MT_delayed, " %sisplaying per-process swap usage.", ps.swap ? "D" : "Not d"); header_text = format_header(uname_field); reset_display(); putchar('\r'); break; default: new_message(MT_standout, " BAD CASE IN SWITCH!"); putchar('\r'); } } /* flush out stuff that may have been written */ fflush(stdout); } } } } #ifdef DEBUG fclose(debug); #endif quit(0); /*NOTREACHED*/ } /* * reset_display() - reset all the display routine pointers so that entire * screen will get redrawn. */ void reset_display() { d_loadave = i_loadave; d_procstates = i_procstates; d_cpustates = i_cpustates; d_memory = i_memory; d_arc = i_arc; d_carc = i_carc; d_swap = i_swap; d_message = i_message; d_header = i_header; d_process = i_process; } /* * signal handlers */ sigret_t leave() /* exit under normal conditions -- INT handler */ { leaveflag = 1; } sigret_t tstop(int i __unused) /* SIGTSTP handler */ { tstopflag = 1; } sigret_t top_winch(int i __unused) /* SIGWINCH handler */ { winchflag = 1; } void quit(status) /* exit under duress */ int status; { end_screen(); exit(status); /*NOTREACHED*/ } Index: head/usr.bin/top/top.h =================================================================== --- head/usr.bin/top/top.h (revision 333945) +++ head/usr.bin/top/top.h (revision 333946) @@ -1,52 +1,79 @@ /* * $FreeBSD$ */ /* * Top - a top users display for Berkeley Unix * * General (global) definitions */ #ifndef TOP_H #define TOP_H -/* Current major version number */ -#define VERSION 3 +#define Default_DELAY 2 /* Number of lines of header information on the standard screen */ extern int Header_lines; /* 7 */ /* Maximum number of columns allowed for display */ #define MAX_COLS 512 /* Log base 2 of 1024 is 10 (2^10 == 1024) */ #define LOG1024 10 /* Special atoi routine returns either a non-negative number or one of: */ #define Infinity -1 #define Invalid -2 /* maximum number we can have */ #define Largest 0x7fffffff /* * The entire display is based on these next numbers being defined as is. */ #define NUM_AVERAGES 3 enum displaymodes { DISP_CPU = 0, DISP_IO, DISP_MAX }; /* * Format modifiers */ #define FMT_SHOWARGS 0x00000001 extern enum displaymodes displaymode; extern int pcpu_stats; char* kill_procs(char *); char* renice_procs(char *); + +/* + * The space command forces an immediate update. Sometimes, on loaded + * systems, this update will take a significant period of time (because all + * the output is buffered). So, if the short-term load average is above + * "LoadMax", then top will put the cursor home immediately after the space + * is pressed before the next update is attempted. This serves as a visual + * acknowledgement of the command. + */ +#define LoadMax 5.0 + +/* + * "Nominal_TOPN" is used as the default TOPN when + * the output is a dumb terminal. If we didn't do this, then + * we will get every + * process in the system when running top on a dumb terminal (or redirected + * to a file). Note that Nominal_TOPN is a default: it can still be + * overridden on the command line, even with the value "infinity". + */ +#define Nominal_TOPN 18 + +/* + * If the local system's getpwnam interface uses random access to retrieve + * a record (i.e.: 4.3 systems, Sun "yellow pages"), then defining + * RANDOM_PW will take advantage of that fact. + */ + +#define RANDOM_PW 1 #endif /* TOP_H */ Index: head/usr.bin/top/username.c =================================================================== --- head/usr.bin/top/username.c (revision 333945) +++ head/usr.bin/top/username.c (revision 333946) @@ -1,184 +1,149 @@ /* * Top users/processes display for Unix - * Version 3 * * This program may be freely redistributed, * but this entire comment MUST remain intact. * * Copyright (c) 1984, 1989, William LeFebvre, Rice University * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University * * $FreeBSD$ */ /* * Username translation code for top. * * These routines handle uid to username mapping. * They use a hashing table scheme to reduce reading overhead. * For the time being, these are very straightforward hashing routines. * Maybe someday I'll put in something better. But with the advent of * "random access" password files, it might not be worth the effort. * * Changes to these have been provided by John Gilmore (gnu@toad.com). * * The hash has been simplified in this release, to avoid the * table overflow problems of previous releases. If the value * at the initial hash location is not right, it is replaced * by the right value. Collisions will cause us to call getpw* * but hey, this is a cache, not the Library of Congress. * This makes the table size independent of the passwd file size. */ #include #include #include #include #include #include #include "top.local.h" #include "utils.h" #include "username.h" struct hash_el { int uid; char name[MAXLOGNAME]; }; #define is_empty_hash(x) (hash_table[x].name[0] == 0) /* simple minded hashing function */ /* Uid "nobody" is -2 results in hashit(-2) = -2 which is out of bounds for the hash_table. Applied abs() function to fix. 2/16/96 tpugh */ #define hashit(i) (abs(i) % Table_size) /* K&R requires that statically declared tables be initialized to zero. */ /* We depend on that for hash_table and YOUR compiler had BETTER do it! */ struct hash_el hash_table[Table_size]; char *username(uid) int uid; { int hashindex; hashindex = hashit(uid); if (is_empty_hash(hashindex) || (hash_table[hashindex].uid != uid)) { /* not here or not right -- get it out of passwd */ hashindex = get_user(uid); } return(hash_table[hashindex].name); } int userid(username) char *username; { struct passwd *pwd; /* Eventually we want this to enter everything in the hash table, but for now we just do it simply and remember just the result. */ if ((pwd = getpwnam(username)) == NULL) { return(-1); } /* enter the result in the hash table */ enter_user(pwd->pw_uid, username, 1); /* return our result */ return(pwd->pw_uid); } int enter_user(uid, name, wecare) int uid; char *name; int wecare; /* 1 = enter it always, 0 = nice to have */ { int hashindex; #ifdef DEBUG fprintf(stderr, "enter_hash(%d, %s, %d)\n", uid, name, wecare); #endif hashindex = hashit(uid); if (!is_empty_hash(hashindex)) { if (!wecare) return 0; /* Don't clobber a slot for trash */ if (hash_table[hashindex].uid == uid) return(hashindex); /* Fortuitous find */ } /* empty or wrong slot -- fill it with new value */ hash_table[hashindex].uid = uid; (void) strncpy(hash_table[hashindex].name, name, MAXLOGNAME - 1); return(hashindex); } /* * 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)); } Index: head/usr.bin/top/username.h =================================================================== --- head/usr.bin/top/username.h (revision 333945) +++ head/usr.bin/top/username.h (revision 333946) @@ -1,23 +1,33 @@ /* * Top users/processes display for Unix * Version 3 * * This program may be freely redistributed, * but this entire comment MUST remain intact. * * Copyright (c) 1984, 1989, William LeFebvre, Rice University * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University * Copyright (c) 2016, Randy Westlund * * $FreeBSD$ */ #ifndef USERNAME_H #define USERNAME_H int enter_user(int uid, char *name, int wecare); int get_user(int uid); 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 */