Login or Register to Ask a Question and Join Our Community


Programming

Procps in Solaris

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Programming Procps in Solaris
# 1  
Old 12-06-2012
Procps in Solaris
Hello All

I am trying to write my own "ps" function by reading the /proc folder and going through each PID folder and getting only a few specific information. On Linux this is easy as the information is stored as text; but on Solaris it seems to be binary.

Does anyone have experience looking through procps code to see how the actual PS command gets process information in Solaris? I tried emailing Albert Cahalan who wrote it but I am too obsecure to get a hold of him.

Please note, executing a system command with PS in my project is out of the question, I must manually get the proc information without using other system commands.

Thanks for your help
# 2  
Old 12-06-2012
This may or may not correspond with your system, but it may provide food for thought: psinfo_t used by print_proc() in ps.c

Regards,
Alister
# 3  
Old 12-06-2012
There are headers in Solaris , procfs.h.

These define the structs used to read the /proc files. And you are right, a lot of the data is binary. One or two of the "files" in /proc/<pid> are directories. /proc/<pid>/path
is very informative with just
Code:
ls-l /proc/self/path

as an example usage.

Example code (modified from an example by R Teer)

Code:
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <time.h>
// #define NEED_SNPRINTF
#ifdef NEED_SNPRINTF
#include <sys/procfs.h>
#else
#include <sys/old_procfs.h>
#endif
#include <limits.h>
// #include "ssp.h"
 extern
 void  get_mem(pid_t pid);
 int getprusage (pid_t pid, prusage_t *pr_usage);
 void print_rusage (pid_t pid, prusage_t *buf);

char dest[64]={0x0};


int main (int argc, char **argv)
{
	pid_t pid;
	prusage_t buf;
	int i;

	if (argc == 1)
	{
		if (getprusage (-1, &buf) == -1)
			{
				perror("getprusage failed");
				exit(1);
			}

		  print_rusage (getpid (), &buf);
		  get_mem(getpid() );
	}
	else
	{
		for (i = 1; i < argc; i++) {
			pid = atoi (argv [i]);
			if (getprusage (pid, &buf) == -1)
			{
				 perror("getprusage failed");
				 exit(1);
		  }
			else
		  {
				print_rusage (pid, &buf);
				get_mem(pid);
			}
		}
	}

	return 0;
}

 int getprusage (pid_t pid, prusage_t *pr_usage)
{
	int fd;
	char name [PATH_MAX];
  
	if (pid == -1)
		snprintf (name, PATH_MAX, "/proc/%ld", (long) getpid ());
	else
		snprintf (name, PATH_MAX, "/proc/%ld", (long) pid);

	if ((fd = open (name, O_RDONLY)) == -1)
		return (-1);
   
	if (ioctl (fd, PIOCUSAGE, pr_usage) == -1) {
		close (fd);
		return (-1);
	}
	else {
		close (fd);
		return (0);
	}
}

void print_rusage(pid_t pid, prusage_t *buf)
{
  printf ("Resource usage for PID %ld:\n", (long) pid);
 printf ("  LWP ID: %ld\n", (long) buf -> pr_lwpid);
 printf ("  Number of LWPs: %d\n", (int) buf -> pr_count);
 printf ("  Timestamp: %ld.%ld\n", buf -> pr_tstamp.tv_sec,
 	              buf -> pr_tstamp.tv_nsec);
 printf ("  Creation time: %ld.%ld\n", buf -> pr_create.tv_sec,
 	             buf -> pr_create.tv_nsec);
 printf ("  Termination time: %ld.%ld\n", buf -> pr_term.tv_sec,
 	              buf -> pr_term.tv_nsec);
  printf ("  Real (elapsed) time: %ld.%ld\n", buf -> pr_rtime.tv_sec,
	              buf -> pr_rtime.tv_nsec);
  printf ("  User CPU time: %ld.%ld\n", buf -> pr_utime.tv_sec,
  	     buf -> pr_utime.tv_nsec);
  printf ("  System CPU time: %ld.%ld\n", buf -> pr_stime.tv_sec,
  	     buf -> pr_stime.tv_nsec);
  printf ("  System trap CPU time: %ld.%ld\n", buf -> pr_ttime.tv_sec,
  	buf -> pr_ttime.tv_nsec);
  printf ("  Text page fault CPU time: %ld.%ld\n", buf -> pr_tftime.tv_sec,
  	buf -> pr_tftime.tv_nsec);
  printf ("  Data page fault CPU time: %ld.%ld\n", buf -> pr_dftime.tv_sec,
  	buf -> pr_dftime.tv_nsec);
  printf ("  Kernel page fault CPU time: %ld.%ld\n", buf -> pr_kftime.tv_sec,
  	buf -> pr_kftime.tv_nsec);
  printf ("  User lock wait time: %ld.%ld\n", buf -> pr_ltime.tv_sec,
  	buf -> pr_ltime.tv_nsec);
  printf ("  Other sleep time: %ld.%ld\n", buf -> pr_slptime.tv_sec,
  	buf -> pr_slptime.tv_nsec);
  printf ("  CPU latency time: %ld.%ld\n", buf -> pr_wtime.tv_sec,
  	buf -> pr_wtime.tv_nsec);
  printf ("  Stopped time: %ld.%ld\n", buf -> pr_stoptime.tv_sec,
  	buf -> pr_stoptime.tv_nsec);
  printf ("  Minor faults: %ld\n", buf -> pr_minf);
  printf ("  Major faults: %ld\n", buf -> pr_majf);
  printf ("  Number of swaps: %ld\n", buf -> pr_nswap);
  printf ("  Input blocks: %ld\n", buf -> pr_inblk);
  printf ("  Output blocks: %ld\n", buf -> pr_oublk);
  printf ("  Messages sent: %ld\n", buf -> pr_msnd);
  printf ("  Messages received: %ld\n", buf -> pr_mrcv);
  printf ("  Signals received: %ld\n", buf -> pr_sigs);
  printf ("  Voluntary context switches: %ld\n", buf -> pr_vctx);
  printf ("  Involuntary context switches: %ld\n", buf -> pr_ictx);
  printf ("  System calls: %ld\n", buf -> pr_sysc);
	printf ("  Characters read/written: %ld\n", buf -> pr_ioch);
	return;
}

/*
*  /proc/pid/status
*/

This User Gave Thanks to jim mcnamara For This Post:
flagman5
# 4  
Old 12-06-2012
There are headers in Solaris , procfs.h.

These define the structs used to read the /proc files. And you are right, a lot of the data is binary. One or two of the "files" in /proc/<pid> are directories. /proc/<pid>/path
is very informative with just
Code:
ls-l /proc/self/path

as an example usage.

Example code (modified from an example by R Teer)

Code:
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <time.h>
// #define NEED_SNPRINTF
#ifdef NEED_SNPRINTF
#include <sys/procfs.h>
#else
#include <sys/old_procfs.h>
#endif
#include <limits.h>
// #include "ssp.h"
 extern
 void  get_mem(pid_t pid);
 int getprusage (pid_t pid, prusage_t *pr_usage);
 void print_rusage (pid_t pid, prusage_t *buf);

char dest[64]={0x0};


int main (int argc, char **argv)
{
	pid_t pid;
	prusage_t buf;
	int i;

	if (argc == 1)
	{
		if (getprusage (-1, &buf) == -1)
			{
				perror("getprusage failed");
				exit(1);
			}

		  print_rusage (getpid (), &buf);
		  get_mem(getpid() );
	}
	else
	{
		for (i = 1; i < argc; i++) {
			pid = atoi (argv [i]);
			if (getprusage (pid, &buf) == -1)
			{
				 perror("getprusage failed");
				 exit(1);
		  }
			else
		  {
				print_rusage (pid, &buf);
				get_mem(pid);
			}
		}
	}

	return 0;
}

 int getprusage (pid_t pid, prusage_t *pr_usage)
{
	int fd;
	char name [PATH_MAX];
  
	if (pid == -1)
		snprintf (name, PATH_MAX, "/proc/%ld", (long) getpid ());
	else
		snprintf (name, PATH_MAX, "/proc/%ld", (long) pid);

	if ((fd = open (name, O_RDONLY)) == -1)
		return (-1);
   
	if (ioctl (fd, PIOCUSAGE, pr_usage) == -1) {
		close (fd);
		return (-1);
	}
	else {
		close (fd);
		return (0);
	}
}

void print_rusage(pid_t pid, prusage_t *buf)
{
  printf ("Resource usage for PID %ld:\n", (long) pid);
 printf ("  LWP ID: %ld\n", (long) buf -> pr_lwpid);
 printf ("  Number of LWPs: %d\n", (int) buf -> pr_count);
 printf ("  Timestamp: %ld.%ld\n", buf -> pr_tstamp.tv_sec,
 	              buf -> pr_tstamp.tv_nsec);
 printf ("  Creation time: %ld.%ld\n", buf -> pr_create.tv_sec,
 	             buf -> pr_create.tv_nsec);
 printf ("  Termination time: %ld.%ld\n", buf -> pr_term.tv_sec,
 	              buf -> pr_term.tv_nsec);
  printf ("  Real (elapsed) time: %ld.%ld\n", buf -> pr_rtime.tv_sec,
	              buf -> pr_rtime.tv_nsec);
  printf ("  User CPU time: %ld.%ld\n", buf -> pr_utime.tv_sec,
  	     buf -> pr_utime.tv_nsec);
  printf ("  System CPU time: %ld.%ld\n", buf -> pr_stime.tv_sec,
  	     buf -> pr_stime.tv_nsec);
  printf ("  System trap CPU time: %ld.%ld\n", buf -> pr_ttime.tv_sec,
  	buf -> pr_ttime.tv_nsec);
  printf ("  Text page fault CPU time: %ld.%ld\n", buf -> pr_tftime.tv_sec,
  	buf -> pr_tftime.tv_nsec);
  printf ("  Data page fault CPU time: %ld.%ld\n", buf -> pr_dftime.tv_sec,
  	buf -> pr_dftime.tv_nsec);
  printf ("  Kernel page fault CPU time: %ld.%ld\n", buf -> pr_kftime.tv_sec,
  	buf -> pr_kftime.tv_nsec);
  printf ("  User lock wait time: %ld.%ld\n", buf -> pr_ltime.tv_sec,
  	buf -> pr_ltime.tv_nsec);
  printf ("  Other sleep time: %ld.%ld\n", buf -> pr_slptime.tv_sec,
  	buf -> pr_slptime.tv_nsec);
  printf ("  CPU latency time: %ld.%ld\n", buf -> pr_wtime.tv_sec,
  	buf -> pr_wtime.tv_nsec);
  printf ("  Stopped time: %ld.%ld\n", buf -> pr_stoptime.tv_sec,
  	buf -> pr_stoptime.tv_nsec);
  printf ("  Minor faults: %ld\n", buf -> pr_minf);
  printf ("  Major faults: %ld\n", buf -> pr_majf);
  printf ("  Number of swaps: %ld\n", buf -> pr_nswap);
  printf ("  Input blocks: %ld\n", buf -> pr_inblk);
  printf ("  Output blocks: %ld\n", buf -> pr_oublk);
  printf ("  Messages sent: %ld\n", buf -> pr_msnd);
  printf ("  Messages received: %ld\n", buf -> pr_mrcv);
  printf ("  Signals received: %ld\n", buf -> pr_sigs);
  printf ("  Voluntary context switches: %ld\n", buf -> pr_vctx);
  printf ("  Involuntary context switches: %ld\n", buf -> pr_ictx);
  printf ("  System calls: %ld\n", buf -> pr_sysc);
	printf ("  Characters read/written: %ld\n", buf -> pr_ioch);
	return;
}

/*
*  /proc/pid/status
*/

# 5  
Old 12-11-2012
http://h30097.www3.hp.com/docs/base_...4/0187____.HTM

this is really helpful too
Login or Register to Ask a Question

Previous Thread | Next Thread

4 More Discussions You Might Find Interesting

1. Solaris

Patching Procedure in Solaris 10 with sun cluster having Solaris zone

Hi Gurus I am not able to find the patching procedure for solaris 10 ( sol10 u11) to latest patchset with sun cluster having failover zones so that same I should follow. Take an instance, there are sol1 and sol2 nodes and having two failover zones like sozone1-rg and sozone2-rg and currently... (1 Reply)
Discussion started by: nick101
1 Replies

2. Solaris

Solaris ssh client hangs when connecting to another Solaris machine

Got a strange problem. I have 4 Solaris servers all configured the same, Solaris 10 x86 update 10. When I try to ssh from one Solaris 10 server to another server ssh hangs. I have an identical server and when I try this everything works fine. The weird thing is if I am root on the server... (1 Reply)
Discussion started by: ccj4467
1 Replies

3. Solaris

root disk mirroring in solaris volume manager for solaris 10

Need a procedure document to do "root disk mirroring in solaris volume manager for solaris 10". I hope some one will help me asap. I need to do it production environment. Let me know if you need any deatils on this. Thanks, Rama (1 Reply)
Discussion started by: ramareddi16
1 Replies

4. Solaris

Unable to login using ssh,telnet onto my solaris machine with solaris 10 installed

Hi, I am unable to login into my terminal hosting Solaris 10 and get the below error message "Server refused to allocate pty ld.so.1: sh: fatal: libc.so.1: open failed: No such file or directory " Is there anyways i can get into my machine and what kind of changes are required to be... (7 Replies)
Discussion started by: sankasu
7 Replies
Login or Register to Ask a Question