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/*
AND auto nice daemon - renice programs according to their CPU usage.
Copyright (C) 1999-2001 Patrick Schemitz <schemitz@users.sourceforge.net>
http://and.sourceforge.net/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <dirent.h>
#include <limits.h>
#include <sys/ioctl.h>
#include <sys/procfs.h>
#include <sys/times.h>
#include <sys/file.h>
#include <sys/resource.h>
#include <sys/utsname.h>
#include <unistd.h>
#include <fcntl.h>
#include <syslog.h>
#include <signal.h>
#include <math.h>
#include <sys/stat.h>
#include "and.h"
/*
AND -- auto-nice daemon/Digital UNIX(OSF/1) version.
OSF/1-specific AND version. Makes reasonable use of the OSF/1
/proc filesystem and seems to be more portable than I thought.
Also works for Solaris (SunOS 5) and IRIX/IRIX64. (Thanks to
Dan Stromberg for telling me.)
2000, 2001 Patrick Schemitz, <schemitz@users.sourceforge.net>
http://and.sourceforge.net/
*/
static DIR *digitalunix_procdir = 0;
static struct and_procent digitalunix_proc;
int digitalunix_readproc (char *fn)
{
prpsinfo_t ps;
double cputime;
int res, fd;
if ((fd = open(fn, O_RDONLY)) < 0) return 0;
res = ioctl(fd, PIOCPSINFO, &ps);
close(fd);
if (res < 0) return 0;
digitalunix_proc.uid = ps.pr_uid;
digitalunix_proc.gid = ps.pr_gid;
strncpy(digitalunix_proc.command,ps.pr_fname,1022);
digitalunix_proc.command[1023] = 0;
cputime = (double)ps.pr_time.tv_sec + (double)ps.pr_time.tv_nsec / 1.0E9;
digitalunix_proc.utime = (int)cputime;
digitalunix_proc.pid = ps.pr_pid;
digitalunix_proc.nice = getpriority(PRIO_PROCESS, ps.pr_pid);
/*
printf("%5i %-20s %5i %3i\n", digitalunix_proc.pid,
digitalunix_proc.command, digitalunix_proc.utime,
digitalunix_proc.nice);
*/
return 1;
}
struct and_procent *digitalunix_getnext ()
{
char name [1024];
struct dirent* entry;
struct stat dirstat;
if (!digitalunix_procdir) return NULL;
while ((entry = readdir(digitalunix_procdir)) != NULL) {
if (!isdigit(entry->d_name[0])) continue;
sprintf(name,"/proc/%s",entry->d_name);
if (access(name, R_OK) < 0) {
and_printf("read access denied: /proc/%s\n",entry->d_name);
continue;
}
break;
}
if (!entry) return NULL;
if (!digitalunix_readproc(name)) return NULL;
return &digitalunix_proc;
}
struct and_procent *digitalunix_getfirst ()
{
if (digitalunix_procdir) {
rewinddir(digitalunix_procdir);
} else {
digitalunix_procdir = opendir("/proc");
if (!digitalunix_procdir) {
and_printf("/proc: cannot open /proc. Aborting.\n");
abort();
}
}
return digitalunix_getnext();
}
int main (int argc, char** argv)
{
and_setprocreader(&digitalunix_getfirst,&digitalunix_getnext);
return and_main(argc,argv);
}
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