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/* pst3.c
*
* Third version to get process arg info; this time by using
* a combination of reading the /proc/<pid>/psinfo structures
* and reading the complete arg vector from kernel memory structures.
*
* Developed and tested under Solaris 5.8 (both 32 and 64 bit modes).
*
* NOTE: This program must be setuid-root (or run by root) to work!
*
* Written: 2005-04-28 R.W.Ingraham
*/
#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
/*
* Structures
*/
/*
* Globals
*/
static char * szProg;
static kvm_t * kd;
static struct proc * pProc;
static struct user * pUser;
static char ** myArgv;
/*
* Prototypes
*/
static int HandleFile (struct dirent *pDent);
static int HandlePsInfo (char *szPath, psinfo_t *pPsInfo);
static int GetArgVectors (pid_t pid);
static void ShowArgVectors (void);
static void ReleaseArgVectors();
/*----------------------------------------------------------------------------*/
int main (int argc, char **argv)
{
DIR *pDir;
struct dirent *pDent;
int retcode = 0;
/* 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);
}
/* Open the /proc directory */
if ((pDir = opendir(PROC_DIR)) != NULL)
{
/* Display column headings */
printf("S UID PPID VSZ RSS %%CPU COMMAND ARGS\n");
/* Zip through all of the process entries */
while ((pDent = readdir(pDir)) != NULL)
{
/* Handle each pid sub-directory */
HandleFile(pDent);
}
/* Close the directory */
closedir(pDir);
}
else /* ERROR: Failure to open PROC_DIR */
{
fprintf(stderr, "%s: Failed to open \"%s\": %s\n", szProg, PROC_DIR, strerror(errno));
retcode = 3;
}
/* Close the handle to the running kernel image */
kvm_close(kd);
return retcode;
}
/*----------------------------------------------------------------------------*/
static int HandleFile (struct dirent *pDent)
{
char szPath[MAX_PATH];
psinfo_t sPsInfo;
int fd, len;
int rc = 0;
/* Skip files beginning with a "." */
if (pDent->d_name[0] == '.')
return 0;
/* Cosntruct the path to the psinfo file */
len = sprintf(szPath, "%s/%s/psinfo", PROC_DIR, pDent->d_name);
/* Open the psinfo file for this pid and print out its arg vectors */
if ((fd = open(szPath, O_RDONLY)) >= 0)
{
/* Read the psinfo struct */
if ((len = read(fd, &sPsInfo, sizeof(sPsInfo))) != sizeof(sPsInfo))
{
rc = errno;
fprintf(stderr, "%s: Read error of psinfo structure (%d)\n", szPath, len);
return rc;
}
/* Close the psinfo file */
close(fd);
/* Pass psinfo struct to reporting function */
HandlePsInfo(szPath, &sPsInfo);
}
else if (errno != ENOENT)
{
rc = errno;
fprintf(stderr, "%s: %s\n", szPath, strerror(errno));
}
return 0;
}
/*----------------------------------------------------------------------------*/
static int HandlePsInfo (char *szPath, psinfo_t *pPsInfo)
{
int retcode;
char *thisProg;
/* Make sure that the process is still there */
if ((retcode = GetArgVectors(pPsInfo->pr_pid)) == 0)
{
/* We use the program name from the kvm argv[0] instead
* of pr_fname from the psinfo struct because pr_fname
* may be truncated.
*
* Also, strip-off leading path information.
*/
if ((thisProg = strrchr(myArgv[0], '/')) != NULL)
thisProg++;
else
thisProg = myArgv[0];
/* Display the ps columns (except for argv) */
printf("%c %5d %5d %6lu %6lu %4.1f %s ",
pPsInfo->pr_lwp.pr_sname,
(int)(pPsInfo->pr_euid),
(int)(pPsInfo->pr_ppid),
(unsigned long)(pPsInfo->pr_size),
(unsigned long)(pPsInfo->pr_rssize),
((float)(pPsInfo->pr_pctcpu) / 0x8000 * 100.0),
thisProg);
/* Display the arg vectors associated with this pid */
ShowArgVectors();
/* Release the arg vector buffer memory */
ReleaseArgVectors();
}
return retcode;
}
/*----------------------------------------------------------------------------*/
static int GetArgVectors (pid_t pid)
{
int retcode = 1;
/* Get the proc structure for the specified PID */
if ((pProc = kvm_getproc(kd, pid)) != NULL)
{
/* Save a copy of the process' u-area */
if ((pUser = kvm_getu(kd, pProc)) != NULL)
{
/* Reconstruct the process' argv vector array */
if (kvm_getcmd(kd, pProc, pUser, &myArgv, NULL) == 0)
{
retcode = 0;
}
}
}
return retcode;
}
/*----------------------------------------------------------------------------*/
static void ShowArgVectors (void)
{
int i;
for (i=0; myArgv[i]; i++)
{
printf(" %s", myArgv[i]);
}
printf("\n");
}
/*----------------------------------------------------------------------------*/
static void ReleaseArgVectors()
{
/* NOOP */
}
/*----------------------------------------------------------------------------*/
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