first version of bob ingraham's pst3 to allow checking for longer

cmdline names than otherwise possible, by querying solaris kmem
directly (ps forcibly truncates).  added requisite configure.in voodoo
and updated THANKS.in.


git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1238 f882894a-f735-0410-b71e-b25c423dba1c

THANKS.in

@@ -168,3 +168,4 @@ Ronald Tin
 Chester Hosey
 Pascal Larisch
 David Sullivan
+Bob Ingraham

configure.in

@@ -598,9 +598,18 @@ dnl #### Process table test
 AC_PATH_PROG(PATH_TO_PS,ps)
 
 AC_MSG_CHECKING(for ps syntax)
+
+dnl Now using the pst3/kmem hack for solaris systems to avoid truncation
+if [ "$ac_cv_uname_s" = "SunOS" ]; then
+	ac_cv_ps_command="$prefix/pst3"
+	ac_cv_ps_format="%s %d %d %d %d %f %s %n"
+	ac_cv_ps_varlist="[procstat,&procuid,&procppid,&procvsz,&procrss,&procpcpu,procprog,&pos]"
+	ac_cv_ps_cols=8
+	AC_MSG_RESULT([using nagios-plugins internal ps for solaris])
+
 dnl Some gnu/linux systems (debian for one) don't like -axwo and need axwo.
 dnl so test for this first...
-if ps axwo 'stat comm vsz rss user uid pid ppid args' 2>/dev/null | \
+elif ps axwo 'stat comm vsz rss user uid pid ppid args' 2>/dev/null | \
 	egrep -i ["^ *STAT +[UCOMAND]+ +VSZ +RSS +USER +UID +PID +PPID +COMMAND"] > /dev/null
 then
 	ac_cv_ps_varlist="[procstat,&procuid,&procpid,&procppid,&procvsz,&procrss,&procpcpu,procprog,&pos]"

plugins-root/pst3.c

@@ -0,0 +1,252 @@
+/*	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 */
+}
+
+/*----------------------------------------------------------------------------*/