int
dbgov_init ()
{
smp_num_cpus = sysconf (_SC_NPROCESSORS_ONLN);
if (smp_num_cpus < 1)
smp_num_cpus = 1;
return set_linux_version ();
}
int main(int argc, char **argv)
{
/* For select(2). */
struct timeval tv;
fd_set in;
/* For parsing arguments. */
char *cp;
/* The key read in. */
char c;
get_options();
/*
* Parse arguments.
*/
argv++;
while (*argv) {
cp = *argv++;
while (*cp) {
switch (*cp) {
case 'd':
if (cp[1]) {
if (sscanf(++cp, "%f", &Sleeptime) != 1) {
fprintf(stderr, PROGNAME ": Bad delay time `%s'\n", cp);
exit(1);
}
goto breakargv;
} else if (*argv) { /* last char in an argv, use next as arg */
if (sscanf(cp = *argv++, "%f", &Sleeptime) != 1) {
fprintf(stderr, PROGNAME ": Bad delay time `%s'\n", cp);
exit(1);
}
goto breakargv;
} else {
fprintf(stderr, "-d requires an argument\n");
exit(1);
}
break;
case 'q':
if (!getuid())
/* set priority to -10 in order to stay above kswapd */
if (setpriority(PRIO_PROCESS, getpid(), -10)) {
/* We check this just for paranoia. It's not
fatal, and shouldn't happen. */
perror(PROGNAME ": setpriority() failed");
}
Sleeptime = 0;
break;
case 'c':
show_cmd = !show_cmd;
break;
case 'S':
Cumulative = 1;
break;
case 'i':
Noidle = 1;
break;
case 's':
Secure = 1;
break;
case '-':
break; /* Just ignore it */
#if defined (SHOWFLAG)
case '/': showall++;
#endif
default:
fprintf(stderr, PROGNAME ": Unknown argument `%c'\n", *cp);
exit(1);
}
cp++;
}
breakargv:
}
/* set to PCPU sorting */
register_sort_function( -1, (cmp_t)pcpu_sort);
/* for correct handling of some fields, we have to do distinguish
* between kernel versions */
set_linux_version();
/* get kernel symbol table, if needed */
if (!CL_wchan_nout) {
if (open_psdb()) {
CL_wchan_nout = 1;
} else {
psdbsucc = 1;
}
}
setup_terminal();
window_size();
/*
* calculate header size, length of cmdline field ...
*/
Numfields = make_header();
/*
* Set up signal handlers.
*/
signal(SIGHUP, (void *) (int) end);
signal(SIGINT, (void *) (int) end);
signal(SIGQUIT, (void *) (int) end);
signal(SIGTSTP, (void *) (int) stop);
signal(SIGWINCH, (void *) (int) window_size);
/* loop, collecting process info and sleeping */
while (1) {
if (setjmp(redraw_jmp))
clear_screen();
/* display the tasks */
show_procs();
/* sleep & wait for keyboard input */
tv.tv_sec = Sleeptime;
tv.tv_usec = (Sleeptime - (int) Sleeptime) * 1000000;
FD_ZERO(&in);
FD_SET(0, &in);
if (select(16, &in, 0, 0, &tv) > 0 && read(0, &c, 1) == 1)
do_key(c);
}
}
/*#######################################################################
*#### Signal handled routines: error_end, end, stop, window_size ###
*#### Small utilities: make_header, getstr, getint, getfloat, getsig ###
*#######################################################################
*/
/*
* end when exiting with an error.
*/
void error_end(int rno)
{
if (psdbsucc)
close_psdb();
ioctl(0, TCSETAF, &Savetty);
PUTP(tgoto(cm, 0, Lines - 1));
fputs("\r\n", stdout);
exit(rno);
}
/*
* Normal end of execution.
*/
void end(void)
{
if (psdbsucc)
close_psdb();
ioctl(0, TCSETAF, &Savetty);
PUTP(tgoto(cm, 0, Lines - 1));
fputs("\r\n", stdout);
exit(0);
}
/*
* SIGTSTP catcher.
*/
void stop(void)
{
/* Reset terminal. */
if (psdbsucc)
close_psdb();
ioctl(0, TCSETAF, &Savetty);
PUTP(tgoto(cm, 0, Lines - 3));
fflush(stdout);
raise(SIGTSTP);
/* Later... */
ioctl(0, TCSETAF, &Rawtty);
signal(SIGTSTP, (void *) (int) stop);
longjmp(redraw_jmp, 1);
}
/*
* Reads the window size and clear the window. This is called on setup,
* and also catches SIGWINCHs, and adjusts Maxlines. Basically, this is
* the central place for window size stuff.
*/
void window_size(void)
{
struct winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) != -1) {
Cols = ws.ws_col;
Lines = ws.ws_row;
} else {
Cols = tgetnum("co");
Lines = tgetnum("li");
}
clear_screen();
}
/*
* this adjusts the lines needed for the header to the current value
*/
int make_header(void)
{
int i, j;
j = 0;
for (i = 0; i < strlen(Fields); i++) {
if (isupper(Fields[i])) {
pflags[j++] = Fields[i] - 'A';
}
}
strcpy(Header, "");
for (i = 0; i < j; i++)
strcat(Header, headers[pflags[i]]);
/* readjust window size ... */
Maxcmd = Cols - strlen(Header) + 7;
Maxlines = Display_procs ? Display_procs : Lines - header_lines;
if (Maxlines > Lines - header_lines)
Maxlines = Lines - header_lines;
return (j);
}
