/
top.c
2827 lines (2510 loc) · 91.4 KB
/
top.c
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/* top.c - Source file: show Linux processes */
/*
* Copyright (c) 2002, by: James C. Warner
* All rights reserved. 8921 Hilloway Road
* Eden Prairie, Minnesota 55347 USA
* <warnerjc@worldnet.att.net>
*
* This file may be used subject to the terms and conditions of the
* GNU Library General Public License Version 2, or any later version
* at your option, as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*/
/* For their contributions to this program, the author wishes to thank:
* Craig Small, <csmall@small.dropbear.id.au>
* Albert D. Cahalan, <albert@users.sf.net>
*/
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <ctype.h>
#include <curses.h>
#include <errno.h>
#ifndef YIELDCPU_OFF
#include <sched.h>
#endif
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <term.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <values.h>
/*
I am listing precisely why each header is needed because of the
construction of libproc -- separate header files may not always be
available and function names are not normalized. We have avoided
some library routine(s) as overkill and have subsumed some others.
*/
/* need: 1 define + dev_to_tty */
#include "proc/devname.h"
/* need: (ksym.c) open_psdb_message, wchan, close_psdb (redhat only) */
#include "proc/procps.h"
/* need: 2 types + openproc, readproc, closeproc */
#include "proc/readproc.h"
/* need: signal_name_to_number */
#include "proc/sig.h"
#ifdef USE_LIB_STA3
/* need: status */
#include "proc/status.h"
#endif
/* need: meminfo stuff */
#include "proc/sysinfo.h"
/* need: procps_version + kernel version stuff */
#include "proc/version.h"
/* need: sprint_uptime */
#include "proc/whattime.h"
#include "top.h"
/*###### Miscellaneous global stuff ####################################*/
/* The original and new terminal attributes */
static struct termios Savedtty,
Rawtty;
static int Ttychanged = 0;
/* Program name used in error messages and local 'rc' file name */
static char *Myname;
/* The Name of the local config file, dynamically constructed */
static char RCfile [OURPATHSZ];
/* The run-time acquired page size */
static int Page_size;
/* SMP, Irix/Solaris mode, Linux 2.5.xx support */
static int Cpu_tot,
*Cpu_map;
/* assume no IO-wait stats, overridden if linux 2.5.41 */
static const char *States_fmts = STATES_line2x4;
/* Specific process id monitoring support */
static pid_t Monpids [MONPIDMAX] = { 0 };
static int Monpidsidx = 0;
/* A postponed error message */
static char Msg_delayed [SMLBUFSIZ];
static int Msg_awaiting = 0;
/* Configurable Display support ##################################*/
/* Current screen dimensions.
note: the number of processes displayed is tracked on a per window
basis (see the WIN_t). Max_lines is the total number of
screen rows after deducting summary information overhead. */
/* Current terminal screen size. */
static int Screen_cols, Screen_rows, Max_lines;
/* This is really the number of lines needed to display the summary
information (0 - nn), but is used as the relative row where we
stick the cursor between frames. */
static int Msg_row;
/* Global/Non-windows mode stuff that IS persistent (in rcfile) */
static int Mode_altscr; /* 'A' - 'Alt' display mode (multi windows) */
/* next toggle physically alters a proc_t, it CANNOT be window based */
static int Mode_irixps = 1; /* 'I' - Irix vs. Solaris mode (SMP-only) */
static float Delay_time = DEF_DELAY; /* how long to sleep between updates */
/* Global/Non-windows mode stuff that is NOT persistent */
static int No_ksyms = -1, /* set to '0' if ksym avail, '1' otherwise */
PSDBopen = 0, /* set to '1' if psdb opened (now postponed) */
Batch = 0, /* batch mode, collect no input, dumb output */
Loops = -1, /* number of iterations, -1 loops forever */
Secure_mode = 0; /* set if some functionality restricted */
/* Some cap's stuff to reduce runtime calls --
to accomodate 'Batch' mode, they begin life as empty strings */
static char Cap_bold [CAPBUFSIZ] = "",
Cap_clr_eol [CAPBUFSIZ] = "",
Cap_clr_eos [CAPBUFSIZ] = "",
Cap_clr_scr [CAPBUFSIZ] = "",
Cap_curs_norm [CAPBUFSIZ] = "",
Cap_curs_huge [CAPBUFSIZ] = "",
Cap_home [CAPBUFSIZ] = "",
Cap_norm [CAPBUFSIZ] = "",
Cap_reverse [CAPBUFSIZ] = "",
Caps_off [CAPBUFSIZ] = "";
static int Cap_can_goto = 0;
/* ////////////////////////////////////////////////////////////// */
/* Special Section: multiple windows/field groups ---------------*/
/* The pointers to our four WIN_t's, and which of those is considered
the 'current' window (ie. which window is associated with any summ
info displayed and to which window commands are directed) */
static WIN_t *Winstk [GROUPSMAX],
*Curwin;
/* Frame oriented stuff that can't remain local to any 1 function
and/or that would be too cumbersome managed as parms */
static int Frame_maxtask; /* last known number of active tasks */
/* ie. current 'size' of proc table */
static float Frame_tscale; /* so we can '*' vs. '/' WHEN 'pcpu' */
static int Frame_srtflg, /* the subject window sort direction */
Frame_ctimes, /* the subject window's ctimes flag */
Frame_cmdlin; /* the subject window's cmdlin flag */
/* ////////////////////////////////////////////////////////////// */
/*###### Sort callbacks ################################################*/
/*
* These happen to be coded in the same order as the enum 'pflag'
* values. Note that 2 of these routines serve double duty --
* 2 columns each.
*/
_SC_NUMx(P_PID, pid)
_SC_NUMx(P_PPD, ppid)
_SC_NUMx(P_PGD, pgrp)
_SC_NUMx(P_UID, euid)
_SC_STRx(P_USR, euser)
_SC_STRx(P_GRP, egroup)
_SC_NUMx(P_TTY, tty)
_SC_NUMx(P_PRI, priority)
_SC_NUMx(P_NCE, nice)
_SC_NUMx(P_CPN, processor)
_SC_NUM1(P_CPU, pcpu)
/* also serves P_TM2 ! */
static int sort_P_TME (const proc_t **P, const proc_t **Q)
{
if (Frame_ctimes) {
if ( ((*P)->cutime + (*P)->cstime + (*P)->utime + (*P)->stime)
< ((*Q)->cutime + (*Q)->cstime + (*Q)->utime + (*Q)->stime) )
return SORT_lt;
if ( ((*P)->cutime + (*P)->cstime + (*P)->utime + (*P)->stime)
> ((*Q)->cutime + (*Q)->cstime + (*Q)->utime + (*Q)->stime) )
return SORT_gt;
} else {
if ( ((*P)->utime + (*P)->stime) < ((*Q)->utime + (*Q)->stime))
return SORT_lt;
if ( ((*P)->utime + (*P)->stime) > ((*Q)->utime + (*Q)->stime))
return SORT_gt;
}
return SORT_eq;
}
_SC_NUM1(P_VRT, size)
_SC_NUM2(P_SWP, size, resident)
_SC_NUM1(P_RES, resident) /* also serves P_MEM ! */
_SC_NUM1(P_COD, trs)
_SC_NUM1(P_DAT, drs)
_SC_NUM1(P_SHR, share)
_SC_NUM1(P_FLT, maj_flt)
_SC_NUM1(P_DRT, dt)
_SC_NUMx(P_STA, state)
static int sort_P_CMD (const proc_t **P, const proc_t **Q)
{
/* if a process doesn't have a cmdline, we'll consider it a kernel thread
-- since show_a_task gives such tasks special treatment, we must too */
if (Frame_cmdlin && ((*P)->cmdline || (*Q)->cmdline)) {
if (!(*Q)->cmdline) return Frame_srtflg * -1;
if (!(*P)->cmdline) return Frame_srtflg;
return Frame_srtflg *
strncmp((*Q)->cmdline[0], (*P)->cmdline[0], (unsigned)Curwin->maxcmdln);
}
/* this part also handles the compare if both are kernel threads */
return Frame_srtflg * strcmp((*Q)->cmd, (*P)->cmd);
}
_SC_NUM1(P_WCH, wchan)
_SC_NUM1(P_FLG, flags)
/*###### Tiny useful routine(s) ########################################*/
/*
* This routine isolates ALL user INPUT and ensures that we
* wont be mixing I/O from stdio and low-level read() requests */
static int chin (int ech, char *buf, unsigned cnt)
{
int rc;
fflush(stdout);
if (!ech)
rc = read(STDIN_FILENO, buf, cnt);
else {
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Savedtty);
rc = read(STDIN_FILENO, buf, cnt);
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Rawtty);
}
/* may be the beginning of a lengthy escape sequence */
tcflush(STDIN_FILENO, TCIFLUSH);
return rc; /* note: we do NOT produce a vaid 'string' */
}
/*
* This routine simply formats whatever the caller wants and
* returns a pointer to the resulting 'const char' string... */
static const char *fmtmk (const char *fmts, ...)
{
static char buf[BIGBUFSIZ]; /* with help stuff, our buffer */
va_list va; /* requirements exceed 1k */
va_start(va, fmts);
vsnprintf(buf, sizeof(buf), fmts, va);
va_end(va);
return (const char *)buf;
}
/*
* This guy was originally designed just to trim the rc file lines and
* any 'open_psdb_message' result which arrived with an inappropriate
* newline (thanks to 'sysmap_mmap') -- but when tabs (^I) were found
* in some proc cmdlines, a choice was offered twix space or null. */
static char *strim (int sp, char *str)
{
static const char ws[] = "\b\f\n\r\t\v";
char *p;
if (sp)
while ((p = strpbrk(str, ws))) *p = ' ';
else
if ((p = strpbrk(str, ws))) *p = 0;
return str;
}
/*
* This guy just facilitates Batch and protects against dumb ttys
* -- we'd 'inline' him but he's only called twice per frame,
* yet used in many other locations. */
static const char *tg2 (int x, int y)
{
return Cap_can_goto ? tgoto(cursor_address, x, y) : "";
}
/*###### Exit/Interrput routines #######################################*/
/*
* The usual program end --
* called only by functions in this section. */
static void bye_bye (int eno, const char *str)
{
if (!Batch)
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Savedtty);
putp(tg2(0, Screen_rows));
putp(Cap_curs_norm);
putp("\n");
#ifdef ATEOJ_REPORT
fprintf(stderr,
"\nbye_bye's Summary report:"
"\n\tProgram"
"\n\t Linux version = %u.%u.%u"
"\n\t Page_size = %d, Cpu_tot = %d"
"\n\t %s, using Hertz = %u (%u bytes, %u-bit time)"
"\n\t sizeof(CPUS_t) = %u, sizeof(HIST_t) = %u (%u HIST_t's/Page)"
"\n\t CPU_FMTS_JUST1 = %s"
"\n\t CPU_FMTS_MULTI = %s"
"\n\tTerminal: %s"
"\n\t device = %s, ncurses = v%s"
"\n\t max_colors = %d, max_pairs = %d"
"\n\t Cap_can_goto = %s"
"\n\t Screen_cols = %d, Screen_rows = %d"
"\n\t Max_lines = %d"
"\n\tWindows and Curwin->"
"\n\t sizeof(WIN_t) = %u, GROUPSMAX = %d"
"\n\t winname = %s, grpname = %s"
#ifdef CASEUP_HEXES
"\n\t winflags = %08X, maxpflgs = %d"
#else
"\n\t winflags = %08x, maxpflgs = %d"
#endif
"\n\t fieldscur = %s"
"\n\t winlines = %d, maxtasks = %d, maxcmdln = %d"
"\n\t sortindx = %d"
"\n"
, LINUX_VERSION_MAJOR(linux_version_code)
, LINUX_VERSION_MINOR(linux_version_code)
, LINUX_VERSION_PATCH(linux_version_code)
, Page_size, Cpu_tot
, procps_version, (unsigned)Hertz, sizeof(Hertz), sizeof(Hertz) * 8
, sizeof(CPUS_t), sizeof(HIST_t), Page_size / sizeof(HIST_t)
, CPU_FMTS_JUST1, CPU_FMTS_MULTI
#ifdef PRETENDNOCAP
, "dumb"
#else
, termname()
#endif
, ttyname(STDOUT_FILENO), NCURSES_VERSION
, max_colors, max_pairs
, Cap_can_goto ? "yes" : "No!"
, Screen_cols, Screen_rows
, Max_lines
, sizeof(WIN_t), GROUPSMAX
, Curwin->winname, Curwin->grpname
, Curwin->winflags, Curwin->maxpflgs
, Curwin->fieldscur
, Curwin->winlines, Curwin->maxtasks, Curwin->maxcmdln
, Curwin->sortindx
);
#endif
if (str) {
if (eno) perror(str);
else {
fputs(str, stderr);
eno = 1;
}
}
exit(eno);
}
/*
* Normal end of execution.
* catches:
* SIGALRM, SIGHUP, SIGINT, SIGPIPE, SIGQUIT and SIGTERM */
static void stop (int dont_care_sig)
{
(void)dont_care_sig;
bye_bye(0, NULL);
}
/*
* Standard error handler to normalize the look of all err o/p */
static void std_err (const char *str)
{
static char buf[SMLBUFSIZ];
fflush(stdout);
/* we'll use our own buffer so callers can still use fmtmk() and, yes the
leading tab is not the standard convention, but the standard is wrong
-- OUR msg won't get lost in screen clutter, like so many others! */
snprintf(buf, sizeof(buf), "\t%s: %s\n", Myname, str);
if (!Ttychanged) {
fprintf(stderr, buf);
exit(1);
}
/* not to worry, he'll change our exit code to 1 due to 'buf' */
bye_bye(0, buf);
}
/*
* Suspend ourself.
* catches:
* SIGTSTP, SIGTTIN and SIGTTOU */
static void suspend (int dont_care_sig)
{
(void)dont_care_sig;
/* reset terminal */
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Savedtty);
putp(tg2(0, Screen_rows));
putp(Cap_curs_norm);
fflush(stdout);
raise(SIGSTOP);
/* later, after SIGCONT... */
if (!Batch)
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Rawtty);
}
/*###### Misc Color/Display support ####################################*/
/*
* Make the appropriate caps/color strings and set some
* lengths which are used to distinguish twix the displayed
* columns and an actual printed row!
* note: we avoid the use of background color so as to maximize
* compatibility with the user's xterm settings */
static void capsmk (WIN_t *q)
{
/* macro to test if a basic (non-color) capability is valid
thanks: Floyd Davidson <floyd@ptialaska.net> */
#define tIF(s) s ? s : ""
static int capsdone = 0;
/* we must NOT disturb our 'empty' terminfo strings! */
if (Batch) return;
/* these are the unchangeable puppies, so we only do 'em once */
if (!capsdone) {
strcpy(Cap_bold, tIF(enter_bold_mode));
strcpy(Cap_clr_eol, tIF(clr_eol));
strcpy(Cap_clr_eos, tIF(clr_eos));
strcpy(Cap_clr_scr, tIF(clear_screen));
strcpy(Cap_curs_huge, tIF(cursor_visible));
strcpy(Cap_curs_norm, tIF(cursor_normal));
strcpy(Cap_home, tIF(cursor_home));
strcpy(Cap_norm, tIF(exit_attribute_mode));
strcpy(Cap_reverse, tIF(enter_reverse_mode));
snprintf(Caps_off, sizeof(Caps_off), "%s%s", Cap_norm, tIF(orig_pair));
if (tgoto(cursor_address, 1, 1)) Cap_can_goto = 1;
capsdone = 1;
}
/* the key to NO run-time costs for configurable colors -- we spend a
little time with the user now setting up our terminfo strings, and
the job's done until he/she/it has a change-of-heart */
if (CHKw(q, Show_COLORS) && max_colors > 0) {
strcpy(q->capclr_sum, tparm(set_a_foreground, q->summclr));
snprintf(q->capclr_msg, sizeof(q->capclr_msg), "%s%s"
, tparm(set_a_foreground, q->msgsclr), Cap_reverse);
snprintf(q->capclr_pmt, sizeof(q->capclr_pmt), "%s%s"
, tparm(set_a_foreground, q->msgsclr), Cap_bold);
snprintf(q->capclr_hdr, sizeof(q->capclr_hdr), "%s%s"
, tparm(set_a_foreground, q->headclr), Cap_reverse);
snprintf(q->capclr_rownorm, sizeof(q->capclr_rownorm), "%s%s"
, Caps_off, tparm(set_a_foreground, q->taskclr));
} else {
q->capclr_sum[0] = '\0';
strcpy(q->capclr_msg, Cap_reverse);
strcpy(q->capclr_pmt, Cap_bold);
strcpy(q->capclr_hdr, Cap_reverse);
strcpy(q->capclr_rownorm, Cap_norm);
}
/* this guy's a composite, so we do him outside the if */
snprintf(q->capclr_rowhigh, sizeof(q->capclr_rowhigh), "%s%s"
, q->capclr_rownorm, CHKw(q, Show_HIBOLD) ? Cap_bold : Cap_reverse);
q->len_rownorm = strlen(q->capclr_rownorm);
q->len_rowhigh = strlen(q->capclr_rowhigh);
#undef tIF
}
/*
* Show an error, but not right now.
* Due to the postponed opening of ksym, using open_psdb_message,
* if P_WCH had been selected and the program is restarted, the
* message would otherwise be displayed prematurely.
* (old top handles that situation with typical inelegance) */
static void msg_save (const char *fmts, ...)
{
char tmp[SMLBUFSIZ];
va_list va;
va_start(va, fmts);
vsnprintf(tmp, sizeof(tmp), fmts, va);
va_end(va);
/* we'll add some extra attention grabbers to whatever this is */
snprintf(Msg_delayed, sizeof(Msg_delayed), "\a*** %s ***", strim(0, tmp));
Msg_awaiting = 1;
}
/*
* Show an error message (caller may include a '\a' for sound) */
static void show_msg (const char *str)
{
PUTP("%s%s %s %s%s"
, tg2(0, Msg_row)
, Curwin->capclr_msg
, str
, Caps_off
, Cap_clr_eol);
fflush(stdout);
sleep(MSG_SLEEP);
Msg_awaiting = 0;
}
/*
* Show an input prompt + larger cursor */
static void show_pmt (const char *str)
{
PUTP("%s%s%s: %s%s"
, tg2(0, Msg_row)
, Curwin->capclr_pmt
, str
, Cap_curs_huge
, Caps_off);
fflush(stdout);
}
/*
* Show lines with specially formatted elements, but only output
* what will fit within the current screen width.
* Our special formatting consists of:
* "some text <_delimiter_> some more text <_delimiter_>...\n"
* Where <_delimiter_> is a single byte in the range of:
* \01 through \10 (in decimalizee, 1 - 8)
* and is used to select an 'attribute' from a capabilities table
* which is then applied to the *preceding* substring.
* Once recognized, the delimiter is replaced with a null character
* and viola, we've got a substring ready to output! Strings or
* substrings without delimiters will receive the Cap_norm attribute.
*
* Caution:
* This routine treats all non-delimiter bytes as displayable
* data subject to our screen width marching orders. If callers
* embed non-display data like tabs or terminfo strings in our
* glob, a line will truncate incorrectly at best. Worse case
* would be truncation of an embedded tty escape sequence.
*
* Tabs must always be avoided or our efforts are wasted and
* lines will wrap. To lessen but not eliminate the risk of
* terminfo string truncation, such non-display stuff should
* be placed at the beginning of a "short" line.
* (and as for tabs, gimme 1 more color then no worries, mate) */
static void show_special (const char *glob)
{ /* note: the following is for documentation only,
the real captab is now found in a group's WIN_t !
+------------------------------------------------------+
| char *captab[] = { : Cap's/Delim's |
| Cap_norm, Cap_norm, Cap_bold, = \00, \01, \02 |
| Sum_color, = \03 |
| Msg_color, Pmt_color, = \04, \05 |
| Hdr_color, = \06 |
| Row_color_high, = \07 |
| Row_color_norm }; = \10 [octal!] |
+------------------------------------------------------+ */
char tmp[BIGBUFSIZ], *cap, *lin_end, *sub_beg, *sub_end;
int room;
/* handle multiple lines passed in a bunch */
while ((lin_end = strchr(glob, '\n'))) {
/* create a local copy we can extend and otherwise abuse */
memcpy(tmp, glob, (unsigned)(lin_end - glob));
/* zero terminate this part and prepare to parse substrings */
tmp[lin_end - glob] = '\0';
room = Screen_cols;
sub_beg = sub_end = tmp;
while (*sub_beg) {
switch (*sub_end) {
case 0: /* no end delim, captab makes normal */
*(sub_end + 1) = '\0'; /* extend str end, then fall through */
case 1: case 2: case 3: case 4:
case 5: case 6: case 7: case 8:
cap = Curwin->captab[(int)*sub_end];
*sub_end = '\0';
PUTP("%s%.*s%s", cap, room, sub_beg, Caps_off);
room -= (sub_end - sub_beg);
sub_beg = ++sub_end;
break;
default: /* nothin' special, just text */
++sub_end;
}
if (0 >= room) break; /* skip substrings that won't fit */
} /* end: while 'subtrings' */
putp(Cap_clr_eol);
putp("\n"); /* emulate truncated newline */
glob = ++lin_end; /* point to next line (maybe) */
} /* end: while 'lines' */
/* if there's anything left in the glob (by virtue of no trailing '\n'),
it probably means caller wants to retain cursor position on this final
line -- ok then, we'll just do our 'fit-to-screen' thingy... */
if (*glob) PUTP("%.*s", Screen_cols, glob);
fflush(stdout);
}
/*###### Small Utility routines ########################################*/
/*
* Get a string from the user */
static char *ask4str (const char *prompt)
{
static char buf[GETBUFSIZ];
show_pmt(prompt);
memset(buf, '\0', sizeof(buf));
chin(1, buf, sizeof(buf) - 1);
putp(Cap_curs_norm);
return strim(0, buf);
}
/*
* Get a float from the user */
static float get_float (const char *prompt)
{
char *line;
float f;
if (!(*(line = ask4str(prompt)))) return -1;
/* note: we're not allowing negative floats */
if (strcspn(line, ",.1234567890")) {
show_msg("\aNot valid");
return -1;
}
sscanf(line, "%f", &f);
return f;
}
/*
* Get an integer from the user */
static int get_int (const char *prompt)
{
char *line;
int n;
if (!(*(line = ask4str(prompt)))) return -1;
/* note: we've got to allow negative ints (renice) */
if (strcspn(line, "-1234567890")) {
show_msg("\aNot valid");
return -1;
}
sscanf(line, "%d", &n);
return n;
}
/*
* Do some scaling stuff.
* We'll interpret 'num' as one of the following types and
* try to format it to fit 'width'.
* SK_no (0) it's a byte count
* SK_Kb (1) it's kilobytes
* SK_Mb (2) it's megabytes
* SK_Gb (3) it's gigabytes */
static const char *scale_num (unsigned num, const int width, const unsigned type)
{
/* kilobytes, megabytes, gigabytes, duh! */
static float scale[] = { 1024, 1024*1024, 1024*1024*1024, 0 };
/* kilo, mega, giga, none */
#ifdef CASEUP_SCALE
static char nextup[] = { 'K', 'M', 'G', 0 };
#else
static char nextup[] = { 'k', 'm', 'g', 0 };
#endif
static char buf[TNYBUFSIZ];
float *dp;
char *up;
/* try an unscaled version first... */
if (width >= snprintf(buf, sizeof(buf), "%u", num)) return buf;
/* now try successively higher types until it fits */
for (up = nextup + type, dp = scale; *dp; ++dp, ++up) {
/* the most accurate version */
if (width >= snprintf(buf, sizeof(buf), "%.1f%c", num / *dp, *up))
return buf;
/* the integer version */
if (width >= snprintf(buf, sizeof(buf), "%d%c", (int)(num / *dp), *up))
return buf;
}
/* well shoot, this outta' fit... */
return "?";
}
/*
* Do some scaling stuff.
* Format 'tics' to fit 'width' */
static const char *scale_tics (TICS_t tics, const int width)
{
#define T1 "%u:%02u.%02u"
#define T2 "%u:%02u"
#ifdef CASEUP_SCALE
#define HH "%uH"
#define DD "%uD"
#define WW "%uW"
#else
#define HH "%uh"
#define DD "%ud"
#define WW "%uw"
#endif
static char buf[TNYBUFSIZ];
unsigned ss;
unsigned nt; // narrow time, for speed on 32-bit
unsigned ct; // centiseconds past the second
ct = ((tics * 100) / Hertz)%100 ;
nt = tics / Hertz;
if (width >= snprintf(buf, sizeof(buf), T1, nt/60, nt%60, ct))
return buf;
ss = nt % 60;
nt /= 60;
if (width >= snprintf(buf, sizeof buf, T2, nt, ss))
return buf;
nt /= 60;
if (width >= snprintf(buf, sizeof buf, HH, nt))
return buf;
nt /= 24;
if (width >= snprintf(buf, sizeof buf, DD, nt))
return buf;
nt /= 7;
if (width >= snprintf(buf, sizeof buf, WW, nt))
return buf;
/* well shoot, this outta' fit... */
return "?";
#undef T1
#undef T2
#undef HH
#undef DD
#undef WW
}
/*
* Calculate and the elapsed time since the last update along with the
* scaling factor used in multiplication (vs. division) when calculating
* a displayable task's %CPU. */
static void time_elapsed (void)
{
static struct timeval oldtimev;
struct timeval timev;
struct timezone timez;
float et;
gettimeofday(&timev, &timez);
et = (timev.tv_sec - oldtimev.tv_sec)
+ (float)(timev.tv_usec - oldtimev.tv_usec) / 1000000.0;
oldtimev.tv_sec = timev.tv_sec;
oldtimev.tv_usec = timev.tv_usec;
/* if in Solaris mode, adjust our scaling for all cpus */
Frame_tscale = 100.0f / ((float)Hertz * (float)et * (Mode_irixps ? 1 : Cpu_tot));
}
/*###### Library Alternatives ##########################################*/
/*
* Handle our own memory stuff without the risk of leaving the
* user's terminal in an ugly state should things go sour. */
static void *alloc_c (unsigned numb)
{
void * p;
if (!numb) ++numb;
if (!(p = calloc(1, numb)))
std_err("failed memory allocate");
return p;
}
static void *alloc_r (void *q, unsigned numb)
{
void *p;
if (!numb) ++numb;
if (!(p = realloc(q, numb)))
std_err("failed memory allocate");
return p;
}
/*
* This guy's modeled on libproc's 'five_cpu_numbers' function except
* we preserve all cpu data in our CPUS_t array which is organized
* as follows:
* cpus[0] thru cpus[n] == tics for each separate cpu
* cpus[Cpu_tot] == tics from the 1st /proc/stat line */
static CPUS_t *refreshcpus (CPUS_t *cpus)
{
static FILE *fp = NULL;
int i;
/* enough for a /proc/stat CPU line (not the intr line) */
char buf[SMLBUFSIZ];
/* by opening this file once, we'll avoid the hit on minor page faults
(sorry Linux, but you'll have to close it for us) */
if (!fp) {
if (!(fp = fopen("/proc/stat", "r")))
std_err(fmtmk("Failed /proc/stat open: %s", strerror(errno)));
/* note: we allocate one more CPUS_t than Cpu_tot so that the last slot
can hold tics representing the /proc/stat cpu summary (the first
line read) -- that slot supports our View_CPUSUM toggle */
cpus = alloc_c((1 + Cpu_tot) * sizeof(CPUS_t));
}
rewind(fp);
fflush(fp);
/* first value the last slot with the cpu summary line */
if (!fgets(buf, sizeof(buf), fp)) std_err("failed /proc/stat read");
if (4 > sscanf(buf, CPU_FMTS_JUST1
, &cpus[Cpu_tot].u, &cpus[Cpu_tot].n, &cpus[Cpu_tot].s, &cpus[Cpu_tot].i, &cpus[Cpu_tot].w))
std_err("failed /proc/stat read");
/* and just in case we're 2.2.xx compiled without SMP support... */
if (1 == Cpu_tot) memcpy(cpus, &cpus[1], sizeof(CPUS_t));
/* and now value each separate cpu's tics */
for (i = 0; 1 < Cpu_tot && i < Cpu_tot; i++) {
#ifdef PRETEND4CPUS
rewind(fp);
#endif
if (!fgets(buf, sizeof(buf), fp)) std_err("failed /proc/stat read");
if (4 > sscanf(buf, CPU_FMTS_MULTI
, &cpus[i].u, &cpus[i].n, &cpus[i].s, &cpus[i].i, &cpus[i].w))
std_err("failed /proc/stat read");
}
return cpus;
}
/*
* This guy's modeled on libproc's 'readproctab' function except
* we reuse and extend any prior proc_t's. He's been customized
* for our specific needs and to avoid the use of <stdarg.h> */
static proc_t **refreshprocs (proc_t **table, int flags)
{
#define PTRsz sizeof(proc_t *) /* eyeball candy */
#define ENTsz sizeof(proc_t)
static unsigned savmax = 0; /* first time, Bypass: (i) */
proc_t *ptsk = (proc_t *)-1; /* first time, Force: (ii) */
unsigned curmax = 0; /* every time (jeeze) */
PROCTAB* PT;
if (Monpidsidx) {
PT = openproc(flags | PROC_PID, Monpids);
/* work around a previous bug in openproc (now corrected) */
PT->procfs = NULL;
} else
PT = openproc(flags);
/* i) Allocated Chunks: *Existing* table; refresh + reuse */
while (curmax < savmax) {
if (table[curmax]->cmdline) {
free(*table[curmax]->cmdline);
table[curmax]->cmdline = NULL;
}
if (!(ptsk = readproc(PT, table[curmax]))) break;
++curmax;
}
/* ii) Unallocated Chunks: *New* or *Existing* table; extend + fill */
while (ptsk) {
/* realloc as we go, keeping 'table' ahead of 'currmax++' */
table = alloc_r(table, (curmax + 1) * PTRsz);
/* here, readproc will allocate the underlying proc_t stg */
if ((ptsk = readproc(PT, NULL)))
table[curmax++] = ptsk;
}
closeproc(PT);
/* iii) Chunkless: make 'eot' entry, after possible extension */
if (curmax >= savmax) {
table = alloc_r(table, (curmax + 1) * PTRsz);
/* here, we must allocate the underlying proc_t stg ourselves */
table[curmax] = alloc_c(ENTsz);
savmax = curmax + 1;
}
/* this frame's end, but not necessarily end of allocated space */
table[curmax]->pid = -1;
return table;
#undef PTRsz
#undef ENTsz
}
/*###### Startup routines ##############################################*/
/*
* No mater what *they* say, we handle the really really BIG and
* IMPORTANT stuff upon which all those lessor functions depend! */
static void before (char *me)
{
int i;
/* setup our program name -- big! */
Myname = strrchr(me, '/');
if (Myname) ++Myname; else Myname = me;
/* establish cpu particulars -- even bigger! */
#ifdef PRETEND4CPUS
Cpu_tot = 4;
#else
Cpu_tot = smp_num_cpus;
#endif
Cpu_map = alloc_r(NULL, sizeof(int) * Cpu_tot);
for (i = 0; i < Cpu_tot; i++)
Cpu_map[i] = i;
if(linux_version_code > LINUX_VERSION(2, 5, 41))
States_fmts = STATES_line2x5;
/* get virtual page size -- nearing huge! */
Page_size = getpagesize();
}
/*
* Build the local RC file name then try to read both of 'em.
* 'SYS_RCFILE' contains two lines consisting of the secure
* mode switch and an update interval. It's presence limits what
* ordinary users are allowed to do.
* '$HOME/RCfile' contains multiple lines - 2 global + 3 per window.
* line 1: a shameless advertisement
* line 2: an id, Mode_altcsr, Mode_irixps, Delay_time and Curwin.
* If running in secure mode via the /etc/rcfile,
* Delay_time will be ignored except for root.
* For each of the 4 windows:
* line a: contains w->winname, fieldscur
* line b: contains w->winflags, sortindx, maxtasks
* line c: contains w->summclr, msgsclr, headclr, taskclr */
static void configs_read (void)
{
static const char err_rc[] = "bad rcfile, you should delete '%s'";
char fbuf[SMLBUFSIZ];
FILE *fp;
float delay = DEF_DELAY;
char id;
int i;
snprintf(RCfile, sizeof(RCfile), ".%src", Myname);
if (getenv("HOME"))
snprintf(RCfile, sizeof(RCfile), "%s/.%src", getenv("HOME"), Myname);
fp = fopen(SYS_RCFILE, "r");
if (fp) {
fbuf[0] = '\0';
fgets(fbuf, sizeof(fbuf), fp); /* sys rc file, line #1 */
if (strchr(fbuf, 's')) Secure_mode = 1;
fbuf[0] = '\0';
fgets(fbuf, sizeof(fbuf), fp); /* sys rc file, line #2 */
fclose(fp);
sscanf(fbuf, "%f", &delay);
}
fp = fopen(RCfile, "r");
if (fp) {
fgets(fbuf, sizeof(fbuf), fp); /* ignore shameless advertisement */
if (5 != (fscanf(fp, "Id:%c, "
"Mode_altscr=%d, Mode_irixps=%d, Delay_time=%f, Curwin=%d\n"
, &id, &Mode_altscr, &Mode_irixps, &delay, &i)) || RCF_FILEID != id)
std_err(fmtmk(err_rc, RCfile));
/* you saw that, right? (fscanf stickin' it to 'i') */
Curwin = Winstk[i];
for (i = 0; i < GROUPSMAX; i++) {
/* we won't check fscanf returns from here on out -- we'll be
hunky-dory with nothing in an rcfile except the 1st 2 lines */
fscanf(fp, "%s\tfieldscur=%s\n"
, Winstk[i]->winname, Winstk[i]->fieldscur);
if (WINNAMSIZ <= strlen(Winstk[i]->winname)
|| strlen(DEF_FIELDS) != strlen(Winstk[i]->fieldscur))
std_err(fmtmk(err_rc, RCfile));
fscanf(fp, "\twinflags=%d, sortindx=%u, maxtasks=%d \n"
, &Winstk[i]->winflags
, &Winstk[i]->sortindx
, &Winstk[i]->maxtasks);
fscanf(fp, "\tsummclr=%d, msgsclr=%d, headclr=%d, taskclr=%d \n"
, &Winstk[i]->summclr
, &Winstk[i]->msgsclr
, &Winstk[i]->headclr
, &Winstk[i]->taskclr);
}