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/*****************************************************************************
*
* pst3
*
* License: GPL
* Copyright (c) 2008 Nagios Plugin Development Team
*
* Description:
*
* This file contains the pst3 executable. This is a replacement ps command
* for Solaris to get output which provides a long argument listing, which
* is not possible with the standard ps command (due to truncation). /usr/ucb/ps
* also has issues where some fields run into each other.
*
* This executable works by reading the kernel memory structures, so needs
* to be executed as root
*
* Originally written by R.W.Ingraham
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*****************************************************************************/
#define _KMEMUSER 1
#include <kvm.h>
#include <sys/param.h>
#include <sys/user.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <procfs.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
/*
* Constants
*/
#define PROC_DIR "/proc"
#define MAX_PATH 1024
#define OK 0
#define FAIL NULL
/*
* Structures
*/
/*
* Globals
*/
static char * szProg;
static kvm_t * kd;
static struct proc * pProc;
static struct user * pUser;
static char ** myArgv;
/*
* Prototypes
*/
static int output_info(struct proc *proc_kvm, psinfo_t procinfo,char **proc_argv);
static psinfo_t get_procinfo(struct proc *proc);
static int HandleProc(struct proc *proc);
/*----------------------------------------------------------------------------*/
int main (int argc, char **argv)
{
DIR *pDir;
struct dirent *pDent;
int retcode = 0;
struct proc *proc;
struct pid pid;
/* Set our program name global */
if ((szProg = strrchr(argv[0], '/')) != NULL)
szProg++;
else
szProg = argv[0];
/* Make sure that our euid is root */
if (geteuid() != 0)
{
fprintf(stderr, "%s: This program can only be run by the root user!\n", szProg);
exit(1);
}
/* Get a handle to the running kernel image */
if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, argv[0])) == NULL)
{
fprintf(stderr, "%s: Failed to open kernel memory: %s\n", szProg, strerror(errno));
exit(2);
}
/* reset to first proc in list */
if(kvm_setproc(kd) == -1) {
perror("kvm_setproc");
exit(2);
}
/* Display column headings */
printf("%c %5s %5s %5s %6s %6s %4s %s %s\n",
'S',
"UID",
"PID",
"PPID",
"VSZ",
"RSS",
"%CPU",
"COMMAND",
"ARGS"
);
/* Zip through all of the process entries */
while((proc = kvm_nextproc(kd)) != 0) {
HandleProc(proc);
}
/* Close the handle to the running kernel image */
kvm_close(kd);
return retcode;
}
/*----------------------------------------------------------------------------*/
static int HandleProc(struct proc *proc)
{
struct pid pid;
struct user *user;
psinfo_t procinfo;
char **proc_argv = 0;
if(kvm_kread(kd, (unsigned long) proc->p_pidp, (char *) &pid, sizeof pid) == -1) {
perror("kvm_read error");
exit(2);
}
proc->p_pidp = &pid;
user = kvm_getu(kd, proc);
if(kvm_getcmd(kd, proc, user, &proc_argv, NULL) == -1) {
return FAIL;
}
procinfo = get_procinfo(proc);
return output_info(proc, procinfo, proc_argv);
}
static psinfo_t get_procinfo(struct proc *proc)
{
char procpath[MAX_PATH];
psinfo_t procinfo;
int fd, len;
sprintf(procpath, "/proc/%d/psinfo", proc->p_pidp->pid_id);
if ((fd = open(procpath, O_RDONLY)) >= 0)
{
if ((len = read(fd, &procinfo, sizeof(procinfo))) != sizeof(procinfo))
{
fprintf(stderr,"%s: Read error of psingo structure (%d)\n", procpath, len);
exit(2);
}
close(fd);
}
return procinfo;
}
static int output_info(struct proc *proc_kvm, psinfo_t procinfo, char **proc_argv)
{
char *procname;
int i;
if((procname = strrchr(proc_argv[0], '/')) != NULL)
procname++;
else
procname = proc_argv[0];
printf("%c %5d %5d %5d %6lu %6lu %4.1f %s ",
procinfo.pr_lwp.pr_sname,
(int)(procinfo.pr_euid),
(int)proc_kvm->p_pidp->pid_id,
(int)proc_kvm->p_ppid,
(unsigned long)(procinfo.pr_size),
(unsigned long)(procinfo.pr_rssize),
((float)(procinfo.pr_pctcpu) / 0x8000 * 100.0),
procname
);
for(i=0;proc_argv[i];i++) {
printf(" %s", proc_argv[i]);
}
printf("\n");
return OK;
}
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