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last_patch58 from vodz:

Browse Source 
Ok. I generate patch for include to busybox-devel my work with
    top (original author give me maintaining) and telnetd (my
    support and unofficial maintaining) applets.  Docs changes
    also: added awk, netstat, time applets to list ;)
This commit is contained in:
Eric Andersen 2002-09-30 20:52:10 +00:00
parent 02e6ba91e8
commit 08a72209c9
9 changed files with 1166 additions and 322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
AUTHORS
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@ -55,7 +55,8 @@ Glenn McGrath <bug1@optushome.com.au>
ar, dpkg, dpkg-deb
Vladimir Oleynik <dzo@simtreas.ru>
cmdedit; ports: ash, stty, traceroute; locale, various fixes
cmdedit; ports: ash, stty, traceroute, telnetd, top;
locale, various fixes
and irreconcilable critic of everything not perfect.
Bruce Perens <bruce@pixar.com>

5
docs/busybox_footer.pod
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@ -113,7 +113,8 @@ Glenn McGrath <bug1@netconnect.com.au>
Vladimir Oleynik <dzo@simtreas.ru>
cmdedit; ports: ash, stty, traceroute; locale, various fixes
cmdedit; ports: ash, stty, traceroute, telnetd, top;
locale, various fixes
and irreconcilable critic of everything not perfect.
=for html <br>
@ -166,4 +167,4 @@ Enrique Zanardi <ezanardi@ull.es>
=cut
# $Id: busybox_footer.pod,v 1.5 2001/12/18 14:06:01 andersen Exp $
# $Id: busybox_footer.pod,v 1.6 2002/09/30 20:52:08 andersen Exp $

28
docs/busybox_header.pod
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@ -55,20 +55,20 @@ terse runtime description of their behavior.
Currently defined functions include:
addgroup, adduser, adjtimex, ar, basename, busybox, cat, chgrp, chmod,
chown, chroot, chvt, clear, cmp, cp, cpio, cut, date, dc, dd, deallocvt,
deluser, df, dirname, dmesg, dos2unix, dpkg, dpkg-deb, du, dumpkmap, dutmp,
echo, expr, false, fbset, fdflush, find, free, freeramdisk, fsck.minix,
getopt, getty, grep, gunzip, gzip, halt, head, hostid, hostname, id,
ifconfig, init, insmod, kill, killall, klogd, length, ln, loadacm,
loadfont, loadkmap, logger, logname, ls, lsmod, makedevs, md5sum, mkdir,
mkfifo, mkfs.minix, mknod, mkswap, mktemp, more, mount, mt, mv, nc,
nslookup, ping, pivot_root, poweroff, printf, ps, pwd, rdate, readlink,
reboot, renice, reset, rm, rmdir, rmmod, route, rpm2cpio, sed, setkeycodes,
sh, sleep, sort, stty, swapoff, swapon, sync, syslogd, tail, tar, tee,
telnet, test, tftp, touch, tr, true, tty, umount, uname, uniq, unix2dos,
update, uptime, usleep, uudecode, uuencode, watchdog, wc, wget, which,
whoami, xargs, yes, zcat, [
addgroup, adduser, adjtimex, ar, awk, basename, busybox, cat, chgrp,
chmod, chown, chroot, chvt, clear, cmp, cp, cpio, cut, date, dc, dd,
deallocvt, deluser, df, dirname, dmesg, dos2unix, dpkg, dpkg-deb, du,
dumpkmap, dutmp, echo, expr, false, fbset, fdflush, find, free,
freeramdisk, fsck.minix, getopt, getty, grep, gunzip, gzip, halt, head,
hostid, hostname, id, ifconfig, init, insmod, kill, killall, klogd, length,
ln, loadacm, loadfont, loadkmap, logger, logname, ls, lsmod, makedevs,
md5sum, mkdir, mkfifo, mkfs.minix, mknod, mkswap, mktemp, more, mount, mt,
mv, nc, netstat, nslookup, ping, pivot_root, poweroff, printf, ps, pwd,
rdate, readlink, reboot, renice, reset, rm, rmdir, rmmod, route, rpm2cpio,
sed, setkeycodes, sh, sleep, sort, stty, swapoff, swapon, sync, syslogd,
tail, tar, tee, telnet, telnetd, test, tftp, time, top, touch, tr, true,
tty, umount, uname, uniq, unix2dos, update, uptime, usleep, uudecode,
uuencode, watchdog, wc, wget, which, whoami, xargs, yes, zcat, [
=over 4

3
include/applets.h
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@ -464,6 +464,9 @@
#ifdef CONFIG_TELNET
APPLET(telnet, telnet_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_TELNETD
APPLET(telnetd, telnetd_main, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_TEST
APPLET(test, test_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif

8
include/usage.h
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@ -1801,6 +1801,14 @@
"Telnet is used to establish interactive communication with another\n"\
"computer over a network using the TELNET protocol."
#define telnetd_trivial_usage \
"[OPTION]"
#define telnetd_full_usage \
"Telnetd listens for incoming TELNET connections on PORT.\n"\
"Options:\n" \
"\t-p PORT\tlisten for connections on PORT (default 23)\n"\
"\t-l LOGIN\texec LOGIN on connect (default /bin/sh)"
#define test_trivial_usage \
"EXPRESSION\n or [ EXPRESSION ]"
#define test_full_usage \

1
networking/Makefile.in
View File

@ -32,6 +32,7 @@ NETWORKING-$(CONFIG_PING) += ping.o
NETWORKING-$(CONFIG_PING6) += ping6.o
NETWORKING-$(CONFIG_ROUTE) += route.o
NETWORKING-$(CONFIG_TELNET) += telnet.o
NETWORKING-$(CONFIG_TELNETD) += telnetd.o
NETWORKING-$(CONFIG_TFTP) += tftp.o
NETWORKING-$(CONFIG_TRACEROUTE) += traceroute.o
NETWORKING-$(CONFIG_UDHCPC) += udhcpc.o

1
networking/config.in
View File

@ -34,6 +34,7 @@ bool 'telnet' CONFIG_TELNET
if [ "$CONFIG_TELNET" = "y" ]; then
bool ' Pass TERM type to remote host' CONFIG_FEATURE_TELNET_TTYPE
fi
bool 'telnetd' CONFIG_TELNETD
bool 'tftp' CONFIG_TFTP
if [ "$CONFIG_TFTP" = "y" ]; then
bool ' Enable "get" command' CONFIG_FEATURE_TFTP_GET

538
networking/telnetd.c Normal file
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@ -0,0 +1,538 @@
/* $Id: telnetd.c,v 1.1 2002/09/30 20:52:04 andersen Exp $
*
* Simple telnet server
* Bjorn Wesen, Axis Communications AB (bjornw@axis.com)
*
* This file is distributed under the Gnu Public License (GPL),
* please see the file LICENSE for further information.
*
* ---------------------------------------------------------------------------
* (C) Copyright 2000, Axis Communications AB, LUND, SWEDEN
****************************************************************************
*
* The telnetd manpage says it all:
*
* Telnetd operates by allocating a pseudo-terminal device (see pty(4)) for
* a client, then creating a login process which has the slave side of the
* pseudo-terminal as stdin, stdout, and stderr. Telnetd manipulates the
* master side of the pseudo-terminal, implementing the telnet protocol and
* passing characters between the remote client and the login process.
*
* Vladimir Oleynik <dzo@simtreas.ru> 2001
* Set process group corrections, initial busybox port
*/
/*#define DEBUG 1 */
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <stdio.h>
#include <signal.h>
#include <termios.h>
#ifdef DEBUG
#define TELCMDS
#define TELOPTS
#endif
#include <arpa/telnet.h>
#include <ctype.h>
#include <sys/syslog.h>
#include "busybox.h"
#define BUFSIZE 4000
static const char *loginpath = "/bin/sh";
/* shell name and arguments */
static const char *argv_init[] = {NULL, NULL};
/* structure that describes a session */
struct tsession {
struct tsession *next;
int sockfd, ptyfd;
int shell_pid;
/* two circular buffers */
char *buf1, *buf2;
int rdidx1, wridx1, size1;
int rdidx2, wridx2, size2;
};
/*
This is how the buffers are used. The arrows indicate the movement
of data.
+-------+ wridx1++ +------+ rdidx1++ +----------+
| | <-------------- | buf1 | <-------------- | |
| | size1-- +------+ size1++ | |
| pty | | socket |
| | rdidx2++ +------+ wridx2++ | |
| | --------------> | buf2 | --------------> | |
+-------+ size2++ +------+ size2-- +----------+
Each session has got two buffers.
*/
static int maxfd;
static struct tsession *sessions;
/*
Remove all IAC's from the buffer pointed to by bf (recieved IACs are ignored
and must be removed so as to not be interpreted by the terminal). Make an
uninterrupted string of characters fit for the terminal. Do this by packing
all characters meant for the terminal sequentially towards the end of bf.
Return a pointer to the beginning of the characters meant for the terminal.
and make *num_totty the number of characters that should be sent to
the terminal.
Note - If an IAC (3 byte quantity) starts before (bf + len) but extends
past (bf + len) then that IAC will be left unprocessed and *processed will be
less than len.
FIXME - if we mean to send 0xFF to the terminal then it will be escaped,
what is the escape character? We aren't handling that situation here.
*/
static char *
remove_iacs(struct tsession *ts, int *pnum_totty) {
unsigned char *ptr0 = ts->buf1 + ts->wridx1;
unsigned char *ptr = ptr0;
unsigned char *totty = ptr;
unsigned char *end = ptr + MIN(BUFSIZE - ts->wridx1, ts->size1);
int processed;
int num_totty;
while (ptr < end) {
if (*ptr != IAC) {
*totty++ = *ptr++;
}
else {
if ((ptr+2) < end) {
/* the entire IAC is contained in the buffer
we were asked to process. */
#ifdef DEBUG
fprintf(stderr, "Ignoring IAC %s,%s\n",
*ptr, TELCMD(*(ptr+1)), TELOPT(*(ptr+2)));
#endif
ptr += 3;
} else {
/* only the beginning of the IAC is in the
buffer we were asked to process, we can't
process this char. */
break;
}
}
}
processed = ptr - ptr0;
num_totty = totty - ptr0;
/* the difference between processed and num_to tty
is all the iacs we removed from the stream.
Adjust buf1 accordingly. */
ts->wridx1 += processed - num_totty;
ts->size1 -= processed - num_totty;
*pnum_totty = num_totty;
/* move the chars meant for the terminal towards the end of the
buffer. */
return memmove(ptr - num_totty, ptr0, num_totty);
}
static int
getpty(char *line)
{
int p;
#ifdef HAVE_DEVPTS_FS
p = open("/dev/ptmx", 2);
if (p > 0) {
grantpt(p);
unlockpt(p);
strcpy(line, ptsname(p));
return(p);
}
#else
struct stat stb;
int i;
int j;
strcpy(line, "/dev/ptyXX");
for (i = 0; i < 16; i++) {
line[8] = "pqrstuvwxyzabcde"[i];
line[9] = '0';
if (stat(line, &stb) < 0) {
continue;
}
for (j = 0; j < 16; j++) {
line[9] = j < 10 ? j + '0' : j - 10 + 'a';
if ((p = open(line, O_RDWR | O_NOCTTY)) >= 0) {
line[5] = 't';
return p;
}
}
}
#endif /* HAVE_DEVPTS_FS */
return -1;
}
static void
send_iac(struct tsession *ts, unsigned char command, int option)
{
/* We rely on that there is space in the buffer for now. */
char *b = ts->buf2 + ts->rdidx2;
*b++ = IAC;
*b++ = command;
*b++ = option;
ts->rdidx2 += 3;
ts->size2 += 3;
}
static struct tsession *
make_new_session(int sockfd)
{
struct termios termbuf;
int pty, pid;
char tty_name[32];
struct tsession *ts = malloc(sizeof(struct tsession) + BUFSIZE * 2);
ts->buf1 = (char *)(&ts[1]);
ts->buf2 = ts->buf1 + BUFSIZE;
ts->sockfd = sockfd;
ts->rdidx1 = ts->wridx1 = ts->size1 = 0;
ts->rdidx2 = ts->wridx2 = ts->size2 = 0;
/* Got a new connection, set up a tty and spawn a shell. */
pty = getpty(tty_name);
if (pty < 0) {
syslog_msg(LOG_USER, LOG_ERR, "All network ports in use!");
return 0;
}
if (pty > maxfd)
maxfd = pty;
ts->ptyfd = pty;
/* Make the telnet client understand we will echo characters so it
* should not do it locally. We don't tell the client to run linemode,
* because we want to handle line editing and tab completion and other
* stuff that requires char-by-char support.
*/
send_iac(ts, DO, TELOPT_ECHO);
send_iac(ts, DO, TELOPT_LFLOW);
send_iac(ts, WILL, TELOPT_ECHO);
send_iac(ts, WILL, TELOPT_SGA);
if ((pid = fork()) < 0) {
syslog_msg(LOG_USER, LOG_ERR, "Can`t forking");
}
if (pid == 0) {
/* In child, open the child's side of the tty. */
int i;
for(i = 0; i <= maxfd; i++)
close(i);
/* make new process group */
setsid();
if (open(tty_name, O_RDWR /*| O_NOCTTY*/) < 0) {
syslog_msg(LOG_USER, LOG_ERR, "Could not open tty");
exit(1);
}
dup(0);
dup(0);
tcsetpgrp(0, getpid());
/* The pseudo-terminal allocated to the client is configured to operate in
* cooked mode, and with XTABS CRMOD enabled (see tty(4)).
*/
tcgetattr(0, &termbuf);
termbuf.c_lflag |= ECHO; /* if we use readline we dont want this */
termbuf.c_oflag |= ONLCR|XTABS;
termbuf.c_iflag |= ICRNL;
termbuf.c_iflag &= ~IXOFF;
/*termbuf.c_lflag &= ~ICANON;*/
tcsetattr(0, TCSANOW, &termbuf);
/* exec shell, with correct argv and env */
execv(loginpath, (char *const *)argv_init);
/* NOT REACHED */
syslog_msg(LOG_USER, LOG_ERR, "execv error");
exit(1);
}
ts->shell_pid = pid;
return ts;
}
static void
free_session(struct tsession *ts)
{
struct tsession *t = sessions;
/* Unlink this telnet session from the session list. */
if(t == ts)
sessions = ts->next;
else {
while(t->next != ts)
t = t->next;
t->next = ts->next;
}
kill(ts->shell_pid, SIGKILL);
wait4(ts->shell_pid, NULL, 0, NULL);
close(ts->ptyfd);
close(ts->sockfd);
if(ts->ptyfd == maxfd || ts->sockfd == maxfd)
maxfd--;
if(ts->ptyfd == maxfd || ts->sockfd == maxfd)
maxfd--;
free(ts);
}
int
telnetd_main(int argc, char **argv)
{
struct sockaddr_in sa;
int master_fd;
fd_set rdfdset, wrfdset;
int selret;
int on = 1;
int portnbr = 23;
int c;
/* check if user supplied a port number */
for (;;) {
c = getopt( argc, argv, "p:l:");
if (c == EOF) break;
switch (c) {
case 'p':
portnbr = atoi(optarg);
break;
case 'l':
loginpath = strdup (optarg);
break;
default:
show_usage();
}
}
if (access(loginpath, X_OK) < 0) {
error_msg_and_die ("'%s' unavailable.", loginpath);
}
argv_init[0] = loginpath;
sessions = 0;
/* Grab a TCP socket. */
master_fd = socket(AF_INET, SOCK_STREAM, 0);
if (master_fd < 0) {
perror_msg_and_die("socket");
}
(void)setsockopt(master_fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
/* Set it to listen to specified port. */
memset((void *)&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(portnbr);
if (bind(master_fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
perror_msg_and_die("bind");
}
if (listen(master_fd, 1) < 0) {
perror_msg_and_die("listen");
}
if (daemon(0, 0) < 0)
perror_msg_and_die("daemon");
maxfd = master_fd;
do {
struct tsession *ts;
FD_ZERO(&rdfdset);
FD_ZERO(&wrfdset);
/* select on the master socket, all telnet sockets and their
* ptys if there is room in their respective session buffers.
*/
FD_SET(master_fd, &rdfdset);
ts = sessions;
while (ts) {
/* buf1 is used from socket to pty
* buf2 is used from pty to socket
*/
if (ts->size1 > 0) {
FD_SET(ts->ptyfd, &wrfdset); /* can write to pty */
}
if (ts->size1 < BUFSIZE) {
FD_SET(ts->sockfd, &rdfdset); /* can read from socket */
}
if (ts->size2 > 0) {
FD_SET(ts->sockfd, &wrfdset); /* can write to socket */
}
if (ts->size2 < BUFSIZE) {
FD_SET(ts->ptyfd, &rdfdset); /* can read from pty */
}
ts = ts->next;
}
selret = select(maxfd + 1, &rdfdset, &wrfdset, 0, 0);
if (!selret)
break;
/* First check for and accept new sessions. */
if (FD_ISSET(master_fd, &rdfdset)) {
int fd, salen;
salen = sizeof(sa);
if ((fd = accept(master_fd, (struct sockaddr *)&sa,
&salen)) < 0) {
continue;
} else {
/* Create a new session and link it into
our active list. */
struct tsession *new_ts = make_new_session(fd);
if (new_ts) {
new_ts->next = sessions;
sessions = new_ts;
if (fd > maxfd)
maxfd = fd;
} else {
close(fd);
}
}
}
/* Then check for data tunneling. */
ts = sessions;
while (ts) { /* For all sessions... */
int maxlen, w, r;
struct tsession *next = ts->next; /* in case we free ts. */
if (ts->size1 && FD_ISSET(ts->ptyfd, &wrfdset)) {
int num_totty;
char *ptr;
/* Write to pty from buffer 1. */
ptr = remove_iacs(ts, &num_totty);
w = write(ts->ptyfd, ptr, num_totty);
if (w < 0) {
free_session(ts);
ts = next;
continue;
}
ts->wridx1 += w;
ts->size1 -= w;
if (ts->wridx1 == BUFSIZE)
ts->wridx1 = 0;
}
if (ts->size2 && FD_ISSET(ts->sockfd, &wrfdset)) {
/* Write to socket from buffer 2. */
maxlen = MIN(BUFSIZE - ts->wridx2, ts->size2);
w = write(ts->sockfd, ts->buf2 + ts->wridx2, maxlen);
if (w < 0) {
free_session(ts);
ts = next;
continue;
}
ts->wridx2 += w;
ts->size2 -= w;
if (ts->wridx2 == BUFSIZE)
ts->wridx2 = 0;
}
if (ts->size1 < BUFSIZE && FD_ISSET(ts->sockfd, &rdfdset)) {
/* Read from socket to buffer 1. */
maxlen = MIN(BUFSIZE - ts->rdidx1,
BUFSIZE - ts->size1);
r = read(ts->sockfd, ts->buf1 + ts->rdidx1, maxlen);
if (!r || (r < 0 && errno != EINTR)) {
free_session(ts);
ts = next;
continue;
}
if(!*(ts->buf1 + ts->rdidx1 + r - 1)) {
r--;
if(!r)
continue;
}
ts->rdidx1 += r;
ts->size1 += r;
if (ts->rdidx1 == BUFSIZE)
ts->rdidx1 = 0;
}
if (ts->size2 < BUFSIZE && FD_ISSET(ts->ptyfd, &rdfdset)) {
/* Read from pty to buffer 2. */
maxlen = MIN(BUFSIZE - ts->rdidx2,
BUFSIZE - ts->size2);
r = read(ts->ptyfd, ts->buf2 + ts->rdidx2, maxlen);
if (!r || (r < 0 && errno != EINTR)) {
free_session(ts);
ts = next;
continue;
}
ts->rdidx2 += r;
ts->size2 += r;
if (ts->rdidx2 == BUFSIZE)
ts->rdidx2 = 0;
}
if (ts->size1 == 0) {
ts->rdidx1 = 0;
ts->wridx1 = 0;
}
if (ts->size2 == 0) {
ts->rdidx2 = 0;
ts->wridx2 = 0;
}
ts = next;
}
} while (1);
return 0;
}

881
procps/top.c
View File

@ -1,60 +1,330 @@
/*
* A tiny 'top' utility.
*
* This is written specifically for the linux /proc/<PID>/status
* file format, but it checks that the file actually conforms to the
* format that this utility expects.
* This is written specifically for the linux /proc/<PID>/stat(m)
* files format.
* This reads the PIDs of all processes at startup and then shows the
* status of those processes at given intervals. User can give
* maximum number of processes to show. If a process exits, it's PID
* is shown as 'EXIT'. If new processes are started while this works,
* it doesn't add them to the list of shown processes.
* This reads the PIDs of all processes and their status and shows
* the status of processes (first ones that fit to screen) at given
* intervals.
*
* NOTES:
* - At startup this changes to /proc, all the reads are then
* relative to that.
* - Includes code from the scandir() manual page.
*
* TODO:
* - ppid, uid etc could be read only once when program starts
* and rest of the information could be gotten from the
* /proc/<PID>/statm file.
* - Add process CPU and memory usage *percentages*.
*
* (C) Eero Tamminen <oak at welho dot com>
*
* Rewroted by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
*/
/* Original code Copyrights */
/*
* Copyright (c) 1992 Branko Lankester
* Copyright (c) 1992 Roger Binns
* Copyright (C) 1994-1996 Charles L. Blake.
* Copyright (C) 1992-1998 Michael K. Johnson
* May be distributed under the conditions of the
* GNU Library General Public License
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
/* get page info */
#include <asm/page.h>
#include "busybox.h"
//#define FEATURE_CPU_USAGE_PERCENTAGE /* + 2k */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
#include <time.h>
#include <sys/time.h>
#include <fcntl.h>
#include <netinet/in.h> /* htons */
#endif
/* process information taken from /proc,
* The code takes into account how long the fields below are,
* starting from copying the file from 'status' file to displaying it!
*/
typedef struct {
char uid[6]; /* User ID */
char pid[6]; /* Pid */
char ppid[6]; /* Parent Pid */
char name[12]; /* Name */
char cmd[20]; /* command line[read/show size] */
char state[2]; /* State: S, W... */
char size[9]; /* VmSize */
char lck[9]; /* VmLck */
char rss[9]; /* VmRSS */
char data[9]; /* VmData */
char stk[9]; /* VmStk */
char exe[9]; /* VmExe */
char lib[9]; /* VmLib */
int pid;
char user[9];
char state[4];
unsigned long rss;
int ppid;
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
unsigned pcpu;
unsigned long stime, utime;
#endif
char *cmd;
/* basename of executable file in call to exec(2),
size from kernel headers */
char short_cmd[16];
} status_t;
typedef int (*cmp_t)(status_t *P, status_t *Q);
static status_t *top; /* Hehe */
static int ntop;
static int pid_sort (status_t *P, status_t *Q)
{
int p = P->pid;
int q = Q->pid;
if( p < q ) return -1;
if( p > q ) return 1;
return 0;
}
static int mem_sort (status_t *P, status_t *Q)
{
long p = P->rss;
long q = Q->rss;
if( p > q ) return -1;
if( p < q ) return 1;
return 0;
}
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
#define sort_depth 3
static cmp_t sort_function[sort_depth];
static int pcpu_sort (status_t *P, status_t *Q)
{
int p = P->pcpu;
int q = Q->pcpu;
if( p > q ) return -1;
if( p < q ) return 1;
return 0;
}
static int time_sort (status_t *P, status_t *Q)
{
long p = P->stime;
long q = Q->stime;
p += P->utime;
q += Q->utime;
if( p > q ) return -1;
if( p < q ) return 1;
return 0;
}
int mult_lvl_cmp(void* a, void* b) {
int i, cmp_val;
for(i = 0; i < sort_depth; i++) {
cmp_val = (*sort_function[i])(a, b);
if (cmp_val != 0)
return cmp_val;
}
return 0;
}
/* This structure stores some critical information from one frame to
the next. mostly used for sorting. Added cumulative and resident fields. */
struct save_hist {
int ticks;
int pid;
int utime;
int stime;
};
/*
* Calculates percent cpu usage for each task.
*/
static struct save_hist *save_history;
static unsigned long Hertz;
/***********************************************************************
* Some values in /proc are expressed in units of 1/HZ seconds, where HZ
* is the kernel clock tick rate. One of these units is called a jiffy.
* The HZ value used in the kernel may vary according to hacker desire.
* According to Linus Torvalds, this is not true. He considers the values
* in /proc as being in architecture-dependant units that have no relation
* to the kernel clock tick rate. Examination of the kernel source code
* reveals that opinion as wishful thinking.
*
* In any case, we need the HZ constant as used in /proc. (the real HZ value
* may differ, but we don't care) There are several ways we could get HZ:
*
* 1. Include the kernel header file. If it changes, recompile this library.
* 2. Use the sysconf() function. When HZ changes, recompile the C library!
* 3. Ask the kernel. This is obviously correct...
*
* Linus Torvalds won't let us ask the kernel, because he thinks we should
* not know the HZ value. Oh well, we don't have to listen to him.
* Someone smuggled out the HZ value. :-)
*
* This code should work fine, even if Linus fixes the kernel to match his
* stated behavior. The code only fails in case of a partial conversion.
*
*/
#define FILE_TO_BUF(filename, fd) do{ \
if (fd == -1 && (fd = open(filename, O_RDONLY)) == -1) { \
perror_msg_and_die("/proc not be mounted?"); \
} \
lseek(fd, 0L, SEEK_SET); \
if ((local_n = read(fd, buf, sizeof buf - 1)) < 0) { \
perror_msg_and_die("%s", filename); \
} \
buf[local_n] = '\0'; \
}while(0)
#define FILE_TO_BUF2(filename, fd) do{ \
lseek(fd, 0L, SEEK_SET); \
if ((local_n = read(fd, buf, sizeof buf - 1)) < 0) { \
perror_msg_and_die("%s", filename); \
} \
buf[local_n] = '\0'; \
}while(0)
static void init_Hertz_value(void) {
unsigned long user_j, nice_j, sys_j, other_j; /* jiffies (clock ticks) */
double up_1, up_2, seconds;
unsigned long jiffies, h;
char buf[80];
int uptime_fd = -1;
int stat_fd = -1;
long smp_num_cpus = sysconf(_SC_NPROCESSORS_CONF);
if(smp_num_cpus<1) smp_num_cpus=1;
do {
int local_n;
FILE_TO_BUF("uptime", uptime_fd);
up_1 = strtod(buf, 0);
FILE_TO_BUF("stat", stat_fd);
sscanf(buf, "cpu %lu %lu %lu %lu", &user_j, &nice_j, &sys_j, &other_j);
FILE_TO_BUF2("uptime", uptime_fd);
up_2 = strtod(buf, 0);
} while((long)( (up_2-up_1)*1000.0/up_1 )); /* want under 0.1% error */
close(uptime_fd);
close(stat_fd);
jiffies = user_j + nice_j + sys_j + other_j;
seconds = (up_1 + up_2) / 2;
h = (unsigned long)( (double)jiffies/seconds/smp_num_cpus );
/* actual values used by 2.4 kernels: 32 64 100 128 1000 1024 1200 */
switch(h){
case 30 ... 34 : Hertz = 32; break; /* ia64 emulator */
case 48 ... 52 : Hertz = 50; break;
case 58 ... 62 : Hertz = 60; break;
case 63 ... 65 : Hertz = 64; break; /* StrongARM /Shark */
case 95 ... 105 : Hertz = 100; break; /* normal Linux */
case 124 ... 132 : Hertz = 128; break; /* MIPS, ARM */
case 195 ... 204 : Hertz = 200; break; /* normal << 1 */
case 253 ... 260 : Hertz = 256; break;
case 295 ... 304 : Hertz = 300; break; /* 3 cpus */
case 393 ... 408 : Hertz = 400; break; /* normal << 2 */
case 495 ... 504 : Hertz = 500; break; /* 5 cpus */
case 595 ... 604 : Hertz = 600; break; /* 6 cpus */
case 695 ... 704 : Hertz = 700; break; /* 7 cpus */
case 790 ... 808 : Hertz = 800; break; /* normal << 3 */
case 895 ... 904 : Hertz = 900; break; /* 9 cpus */
case 990 ... 1010 : Hertz = 1000; break; /* ARM */
case 1015 ... 1035 : Hertz = 1024; break; /* Alpha, ia64 */
case 1095 ... 1104 : Hertz = 1100; break; /* 11 cpus */
case 1180 ... 1220 : Hertz = 1200; break; /* Alpha */
default:
/* If 32-bit or big-endian (not Alpha or ia64), assume HZ is 100. */
Hertz = (sizeof(long)==sizeof(int) || htons(999)==999) ? 100UL : 1024UL;
}
}
static void do_stats(void)
{
struct timeval t;
static struct timeval oldtime;
struct timezone timez;
float elapsed_time;
status_t *cur;
int total_time, i, n;
static int prev_count;
int systime, usrtime, pid;
struct save_hist *New_save_hist;
/*
* Finds the current time (in microseconds) and calculates the time
* elapsed since the last update.
*/
gettimeofday(&t, &timez);
elapsed_time = (t.tv_sec - oldtime.tv_sec)
+ (float) (t.tv_usec - oldtime.tv_usec) / 1000000.0;
oldtime.tv_sec = t.tv_sec;
oldtime.tv_usec = t.tv_usec;
New_save_hist = alloca(sizeof(struct save_hist)*ntop);
/*
* Make a pass through the data to get stats.
*/
for(n = 0; n < ntop; n++) {
cur = top + n;
/*
* Calculate time in cur process. Time is sum of user time
* (usrtime) plus system time (systime).
*/
systime = cur->stime;
usrtime = cur->utime;
pid = cur->pid;
total_time = systime + usrtime;
New_save_hist[n].ticks = total_time;
New_save_hist[n].pid = pid;
New_save_hist[n].stime = systime;
New_save_hist[n].utime = usrtime;
/* find matching entry from previous pass */
for (i = 0; i < prev_count; i++) {
if (save_history[i].pid == pid) {
total_time -= save_history[i].ticks;
systime -= save_history[i].stime;
usrtime -= save_history[i].utime;
break;
}
}
/*
* Calculate percent cpu time for cur task.
*/
i = (total_time * 10 * 100/Hertz) / elapsed_time;
if (i > 999)
i = 999;
cur->pcpu = i;
}
/*
* Save cur frame's information.
*/
free(save_history);
save_history = memcpy(xmalloc(sizeof(struct save_hist)*n), New_save_hist,
sizeof(struct save_hist)*n);
prev_count = n;
qsort(top, n, sizeof(status_t), (void*)mult_lvl_cmp);
}
#else
static cmp_t sort_function;
#endif /* FEATURE_CPU_USAGE_PERCENTAGE */
/* display generic info (meminfo / loadavg) */
static void display_generic(void)
static unsigned long display_generic(void)
{
FILE *fp;
char buf[80];
@ -62,303 +332,245 @@ static void display_generic(void)
unsigned long total, used, mfree, shared, buffers, cached;
/* read memory info */
fp = fopen("meminfo", "r");
if (!fp) {
perror("fopen('meminfo')");
return;
}
fp = xfopen("meminfo", "r");
fgets(buf, sizeof(buf), fp); /* skip first line */
if (fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
&total, &used, &mfree, &shared, &buffers, &cached) != 6) {
fprintf(stderr, "Error: failed to read 'meminfo'");
fclose(fp);
error_msg_and_die("failed to read '%s'", "meminfo");
}
fclose(fp);
/* read load average */
fp = fopen("loadavg", "r");
if (!fp) {
perror("fopen('loadavg')");
return;
}
fp = xfopen("loadavg", "r");
if (fscanf(fp, "%f %f %f", &avg1, &avg2, &avg3) != 3) {
fprintf(stderr, "Error: failed to read 'loadavg'");
fclose(fp);
return;
error_msg_and_die("failed to read '%s'", "loadavg");
}
fclose(fp);
/* convert to kilobytes */
if (total) total /= 1024;
if (used) used /= 1024;
if (mfree) mfree /= 1024;
if (shared) shared /= 1024;
if (buffers) buffers /= 1024;
if (cached) cached /= 1024;
used /= 1024;
mfree /= 1024;
shared /= 1024;
buffers /= 1024;
cached /= 1024;
/* output memory info and load average */
printf("Mem: %ldK, %ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached\n",
total, used, mfree, shared, buffers, cached);
printf("Load average: %.2f, %.2f, %.2f (State: S=sleeping R=running, W=waiting)\n",
/* clear screen & go to top */
printf("\e[H\e[J" "Mem: "
"%ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached\n",
used, mfree, shared, buffers, cached);
printf("Load average: %.2f, %.2f, %.2f "
"(State: S=sleeping R=running, W=waiting)\n",
avg1, avg2, avg3);
return total / 1024;
}
/* display process statuses */
static void display_status(int count, const status_t *s)
static void display_status(int count, int col)
{
const char *fmt, *cmd;
/* clear screen & go to top */
printf("\e[2J\e[1;1H");
display_generic();
status_t *s = top;
char rss_str_buf[8];
unsigned long total_memory = display_generic();
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
/* what info of the processes is shown */
printf("\n%*s %*s %*s %*s %*s %*s %-*s\n",
sizeof(s->pid)-1, "Pid:",
sizeof(s->state)-1, "",
sizeof(s->ppid)-1, "PPid:",
sizeof(s->uid)-1, "UID:",
sizeof(s->size)-1, "WmSize:",
sizeof(s->rss)-1, "WmRSS:",
sizeof(s->cmd)-1, "command line:");
printf("\n\e[7m PID USER STATUS RSS PPID %%CPU %%MEM COMMAND\e[0m\n");
#else
printf("\n\e[7m PID USER STATUS RSS PPID %%MEM COMMAND\e[0m\n");
#endif
while (count--) {
if (s->cmd[0]) {
/* normal process, has command line */
cmd = s->cmd;
fmt = "%*s %*s %*s %*s %*s %*s %s\n";
} else {
/* no command line, show only process name */
cmd = s->name;
fmt = "%*s %*s %*s %*s %*s %*s [%s]\n";
}
printf(fmt,
sizeof(s->pid)-1, s->pid,
sizeof(s->state)-1, s->state,
sizeof(s->ppid)-1, s->ppid,
sizeof(s->uid)-1, s->uid,
sizeof(s->size)-1, s->size,
sizeof(s->rss)-1, s->rss,
cmd);
s++;
}
}
char *namecmd = s->cmd;
int pmem;
pmem = 1000.0 * s->rss / total_memory;
if (pmem > 999) pmem = 999;
/* checks if given 'buf' for process starts with 'id' + ':' + TAB
* and stores rest of the buf to 'store' with max size 'size'
*/
static int process_status(const char *buf, const char *id, char *store, size_t size)
{
int len, i;
/* check status field name */
len = strlen(id);
if (strncmp(buf, id, len) != 0) {
if(store)
error_msg_and_die("ERROR status: line doesn't start with '%s' in:\n%s\n", id, buf);
if(s->rss > 10*1024)
sprintf(rss_str_buf, "%6ldM", s->rss/1024);
else
return 0;
}
if (!store) {
/* ignoring this field */
return 1;
}
buf += len;
/* check status field format */
if ((*buf++ != ':') || (*buf++ != '\t')) {
error_msg_and_die("ERROR status: field '%s' not followed with ':' + TAB in:\n%s\n", id, buf);
}
/* skip whitespace in Wm* fields */
if (id[0] == 'V' && id[1] == 'm') {
i = 3;
while (i--) {
if (*buf == ' ') {
buf++;
sprintf(rss_str_buf, "%7ld", s->rss);
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
printf("%5d %-8s %s %s %5d %2d.%d %2u.%u ",
#else
printf("%5d %-8s %s %s %5d %2u.%u ",
#endif
s->pid, s->user, s->state, rss_str_buf, s->ppid,
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
s->pcpu/10, s->pcpu%10,
#endif
pmem/10, pmem%10);
if(namecmd != 0 && namecmd[0] != 0) {
if(strlen(namecmd) > col)
namecmd[col] = 0;
printf("%s\n", namecmd);
} else {
error_msg_and_die("ERROR status: can't skip whitespace for "
"'%s' field in:\n%s\n", id, buf);
namecmd = s->short_cmd;
if(strlen(namecmd) > (col-2))
namecmd[col-2] = 0;
printf("[%s]\n", namecmd);
}
}
}
/* copy at max (size-1) chars and force '\0' to the end */
while (--size) {
if (*buf < ' ') {
break;
}
*store++ = *buf++;
}
*store = '\0';
return 1;
}
/* read process statuses */
static void read_status(int num, status_t *s)
{
char status[20];
char buf[80];
FILE *fp;
while (num--) {
sprintf(status, "%s/status", s->pid);
/* read the command line from 'cmdline' in PID dir */
fp = fopen(status, "r");
if (!fp) {
strncpy(s->pid, "EXIT", sizeof(s->pid));
s->pid[sizeof(s->pid)-1] = '\0';
fclose(fp);
continue;
}
/* get and process the information */
fgets(buf, sizeof(buf), fp);
process_status(buf, "Name", s->name, sizeof(s->name));
fgets(buf, sizeof(buf), fp);
process_status(buf, "State", s->state, sizeof(s->state));
fgets(buf, sizeof(buf), fp);
if(process_status(buf, "Tgid", NULL, 0))
fgets(buf, sizeof(buf), fp);
process_status(buf, "Pid", NULL, 0);
fgets(buf, sizeof(buf), fp);
process_status(buf, "PPid", s->ppid, sizeof(s->ppid));
fgets(buf, sizeof(buf), fp);
if(process_status(buf, "TracerPid", NULL, 0))
fgets(buf, sizeof(buf), fp);
process_status(buf, "Uid", s->uid, sizeof(s->uid));
fgets(buf, sizeof(buf), fp);
process_status(buf, "Gid", NULL, 0);
fgets(buf, sizeof(buf), fp);
if(process_status(buf, "FDSize", NULL, 0))
fgets(buf, sizeof(buf), fp);
process_status(buf, "Groups", NULL, 0);
fgets(buf, sizeof(buf), fp);
/* only user space processes have command line
* and memory statistics
*/
if (s->cmd[0]) {
process_status(buf, "VmSize", s->size, sizeof(s->size));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmLck", s->lck, sizeof(s->lck));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmRSS", s->rss, sizeof(s->rss));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmData", s->data, sizeof(s->data));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmStk", s->stk, sizeof(s->stk));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmExe", s->exe, sizeof(s->exe));
fgets(buf, sizeof(buf), fp);
process_status(buf, "VmLib", s->lib, sizeof(s->lib));
}
fclose(fp);
/* next process */
s++;
}
}
/* allocs statuslist and reads process command lines, frees namelist,
* returns filled statuslist or NULL in case of error.
*/
static status_t *read_info(int num, struct dirent **namelist)
{
status_t *statuslist, *s;
char cmdline[20];
FILE *fp;
int idx;
/* allocate & zero status for each of the processes */
statuslist = calloc(num, sizeof(status_t));
if (!statuslist) {
return NULL;
}
/* go through the processes */
for (idx = 0; idx < num; idx++) {
/* copy PID string to status struct and free name */
s = &(statuslist[idx]);
if (strlen(namelist[idx]->d_name) > sizeof(s->pid)-1) {
fprintf(stderr, "PID '%s' too long\n", namelist[idx]->d_name);
return NULL;
}
strncpy(s->pid, namelist[idx]->d_name, sizeof(s->pid));
s->pid[sizeof(s->pid)-1] = '\0';
free(namelist[idx]);
/* read the command line from 'cmdline' in PID dir */
sprintf(cmdline, "%s/cmdline", s->pid);
fp = fopen(cmdline, "r");
if (!fp) {
fclose(fp);
perror("fopen('cmdline')");
return NULL;
}
fgets(statuslist[idx].cmd, sizeof(statuslist[idx].cmd), fp);
fclose(fp);
}
free(namelist);
return statuslist;
}
/* returns true for file names which are PID dirs
* (i.e. start with number)
*/
static int filter_pids(const struct dirent *dir)
{
status_t dummy;
char *name = dir->d_name;
int n;
char status[20];
char buf[1024];
FILE *fp;
status_t curstatus;
int pid;
long tasknice;
struct stat sb;
if (*name >= '0' && *name <= '9') {
if (strlen(name) > sizeof(dummy.pid)-1) {
fprintf(stderr, "PID name '%s' too long\n", name);
if (!(*name >= '0' && *name <= '9'))
return 0;
if(stat(name, &sb))
return 0;
memset(&curstatus, 0, sizeof(status_t));
pid = atoi(name);
curstatus.pid = pid;
my_getpwuid(curstatus.user, sb.st_uid);
sprintf(status, "%d/stat", pid);
if((fp = fopen(status, "r")) == NULL)
return 0;
name = fgets(buf, sizeof(buf), fp);
fclose(fp);
if(name == NULL)
return 0;
name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
if(name == 0 || name[1] != ' ')
return 0;
*name = 0;
sscanf(buf, "%*s (%15c", curstatus.short_cmd);
n = sscanf(name+2,
"%c %d "
"%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */
"%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
"%lu %lu "
#else
"%*s %*s "
#endif
"%*s %*s %*s " /* cutime, cstime, priority */
"%ld "
"%*s %*s %*s " /* timeout, it_real_value, start_time */
"%*s " /* vsize */
"%ld",
curstatus.state, &curstatus.ppid,
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
&curstatus.utime, &curstatus.stime,
#endif
&tasknice,
&curstatus.rss);
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
if(n != 6)
#else
if(n != 4)
#endif
return 0;
if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
curstatus.state[1] = 'W';
else
curstatus.state[1] = ' ';
if (tasknice < 0)
curstatus.state[2] = '<';
else if (tasknice > 0)
curstatus.state[2] = 'N';
else
curstatus.state[2] = ' ';
curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
sprintf(status, "%d/cmdline", pid);
if((fp = fopen(status, "r")) == NULL)
return 0;
if(fgets(buf, sizeof(buf), fp) != NULL) {
name = strchr(buf, '\n');
if(name != NULL)
*name = 0;
if(buf[0])
curstatus.cmd = strdup(buf); /* if NULL it work true also */
}
fclose(fp);
n = ntop;
top = xrealloc(top, (++ntop)*sizeof(status_t));
memcpy(top + n, &curstatus, sizeof(status_t));
return 1;
}
return 0;
static struct dirent **namelist;
static void clearmems(void) {
int i;
for(i = 0; i < ntop; i++) {
free(top[i].cmd);
free(namelist[i]);
}
free(top);
free(namelist);
top = 0;
namelist = 0;
ntop = 0;
}
#if defined CONFIG_FEATURE_USE_TERMIOS
#include <termios.h>
#include <sys/time.h>
#include <signal.h>
/* compares two directory entry names as numeric strings
*/
static int num_sort(const void *a, const void *b)
static struct termios initial_settings;
static void reset_term(void)
{
int ia = atoi((*(struct dirent **)a)->d_name);
int ib = atoi((*(struct dirent **)b)->d_name);
tcsetattr(0, TCSANOW, (void *) &initial_settings);
#ifdef CONFIG_FEATURE_CLEAN_UP
clearmems();
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
free(save_history);
#endif
#endif /* CONFIG_FEATURE_CLEAN_UP */
}
if (ia == ib) {
return 0;
}
/* NOTE: by switching the check, you change the process sort order */
if (ia < ib) {
return -1;
} else {
return 1;
}
static void sig_catcher (int sig)
{
reset_term();
}
#endif /* CONFIG_FEATURE_USE_TERMIOS */
int top_main(int argc, char **argv)
{
status_t *statuslist;
struct dirent **namelist;
int opt, num, interval, lines;
#if defined CONFIG_FEATURE_AUTOWIDTH && defined CONFIG_FEATURE_USE_TERMIOS
int opt, interval, lines, col;
#if defined CONFIG_FEATURE_USE_TERMIOS
struct termios new_settings;
struct timeval tv;
fd_set readfds;
unsigned char c;
struct sigaction sa;
#if defined CONFIG_FEATURE_AUTOWIDTH
struct winsize win = { 0, 0, 0, 0 };
#endif
#endif /* CONFIG_FEATURE_USE_TERMIOS */
/* Default update rate is 5 seconds */
interval = 5;
/* Default to 25 lines - 5 lines for status */
lines = 25 - 5;
/* do normal option parsing */
while ((opt = getopt(argc, argv, "d:")) > 0) {
@ -371,42 +583,121 @@ int top_main(int argc, char **argv)
}
}
#if defined CONFIG_FEATURE_AUTOWIDTH && defined CONFIG_FEATURE_USE_TERMIOS
ioctl(fileno(stdout), TIOCGWINSZ, &win);
if (win.ws_row > 4)
lines = win.ws_row - 5;
/* Default to 25 lines - 5 lines for status */
lines = 25 - 5;
/* Default CMD format size */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
col = 35 - 6;
#else
col = 35;
#endif
/* change to proc */
if (chdir("/proc") < 0) {
perror_msg_and_die("chdir('/proc')");
}
#if defined CONFIG_FEATURE_USE_TERMIOS
tcgetattr(0, (void *) &initial_settings);
memcpy(&new_settings, &initial_settings, sizeof(struct termios));
new_settings.c_lflag &= ~(ISIG | ICANON); /* unbuffered input */
/* Turn off echoing */
new_settings.c_lflag &= ~(ECHO | ECHONL);
/* read process IDs for all the processes from the procfs */
num = scandir(".", &namelist, filter_pids, num_sort);
if (num < 0) {
signal (SIGTERM, sig_catcher);
sigaction (SIGTERM, (struct sigaction *) 0, &sa);
sa.sa_flags |= SA_RESTART;
sa.sa_flags &= ~SA_INTERRUPT;
sigaction (SIGTERM, &sa, (struct sigaction *) 0);
sigaction (SIGINT, &sa, (struct sigaction *) 0);
tcsetattr(0, TCSANOW, (void *) &new_settings);
atexit(reset_term);
#if defined CONFIG_FEATURE_AUTOWIDTH
ioctl(0, TIOCGWINSZ, &win);
if (win.ws_row > 4) {
lines = win.ws_row - 5;
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
col = win.ws_col - 80 + 35 - 6;
#else
col = win.ws_col - 80 + 35;
#endif
}
#endif
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
sort_function[0] = pcpu_sort;
sort_function[1] = mem_sort;
sort_function[2] = time_sort;
#else
sort_function = mem_sort;
#endif
while (1) {
/* read process IDs & status for all the processes */
if (scandir(".", &namelist, filter_pids, 0) < 0) {
perror_msg_and_die("scandir('/proc')");
}
if (lines > num) {
lines = num;
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
if(!Hertz) {
init_Hertz_value();
do_stats();
sleep(1);
clearmems();
continue;
}
/* read command line for each of the processes */
statuslist = read_info(num, namelist);
if (!statuslist) {
do_stats();
#else
qsort(top, ntop, sizeof(status_t), (void*)sort_function);
#endif
opt = lines;
if (opt > ntop) {
opt = ntop;
}
/* show status for each of the processes */
display_status(opt, col);
#if defined CONFIG_FEATURE_USE_TERMIOS
tv.tv_sec = interval;
tv.tv_usec = 0;
FD_ZERO (&readfds);
FD_SET (0, &readfds);
select (1, &readfds, NULL, NULL, &tv);
if (FD_ISSET (0, &readfds)) {
if (read (0, &c, 1) <= 0) { /* signal */
return EXIT_FAILURE;
}
while (1) {
/* read status for each of the processes */
read_status(num, statuslist);
/* display status */
display_status(lines, statuslist);
if(c == 'q' || c == initial_settings.c_cc[VINTR])
return EXIT_SUCCESS;
if(c == 'M') {
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
sort_function[0] = mem_sort;
sort_function[1] = pcpu_sort;
sort_function[2] = time_sort;
#else
sort_function = mem_sort;
#endif
}
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
if(c == 'P') {
sort_function[0] = pcpu_sort;
sort_function[1] = mem_sort;
sort_function[2] = time_sort;
}
if(c == 'T') {
sort_function[0] = time_sort;
sort_function[1] = mem_sort;
sort_function[2] = pcpu_sort;
}
#endif
if(c == 'N') {
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
sort_function[0] = pid_sort;
#else
sort_function = pid_sort;
#endif
}
}
#else
sleep(interval);
#endif /* CONFIG_FEATURE_USE_TERMIOS */
clearmems();
}
free(statuslist);
return EXIT_SUCCESS;
}