[Python-Dev] PyConfig.h On Solaris

John Abel johnfabel@btinternet.com
Mon, 21 Jul 2003 21:07:36 +0100


I apologise if this is an inappropriate post for this list; my query is 
concerned with the internals of Python, honest :)  I am trying to 
compile a C module on Solaris, to return extended process information 
(args greater than 80 characters).  However, the _FILE_OFFSET_BITS in 
pyconfig.h is causing me a bit of bother.  It is preventing me, from 
correctly parsing /proc - according to the man pages, any handling of  
/proc entries must be done with 32bit structures, variables, etc.  I've 
tried undefining it at compile time, without success.  I've had to 
define _LP64, include <procfs.h>, then undefine _LP64.  Doing this, 
allows me to use structured proc, instead of the deprecatd ioctl method. 

However, I don't think this is a working solution, as the code compiles, 
runs, but returns dubious results (I have a pure C version of the code, 
which works fine).  I've included the code below.  Is there a way, to 
tell Python to compile a module in 32bit mode?  Or, is there a 
workaround for this Solaris oddity?



#include "Python.h"

#include <stdio.h>
#define _LP64
#include <procfs.h>
#undef _LP64
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

static PyObject *
psinfo_fullpidinfo(PyObject *self, PyObject *args)
   PyObject *queryPid;
   char procBuf[50];
   char argStr[512];
   char **argvp;
   int fdPSInfoFile, fdASFile, counter;
   struct psinfo psBuf;

   if (!PyArg_ParseTuple(args, "i:pidinfo", &queryPid) ) {
       return NULL;
     (void)sprintf(procBuf,"/proc/%i/psinfo", (int)queryPid);
   (void)sprintf(asBuf,"/proc/%i/as", (int)queryPid);
     if ((fdPSInfoFile = open(procBuf, O_RDONLY)) != -1 ) {
       if (read(fdPSInfoFile, &psBuf, sizeof(struct psinfo)) == 
sizeof(struct psinfo) ) {
           if ((fdASFile = open(asBuf, O_RDONLY)) == -1 ) {
               printf(" Open Of AS Failed");
           else {
               printf( "%d", psBuf.pr_argc);
               argvp=(char **) malloc(sizeof(char *) * (psBuf.pr_argc + 
                             if (lseek(fdASFile, psBuf.pr_argv, 
SEEK_SET) == -1) {
                   printf ("Initial LSeek Failed" );
                   return NULL;
                             if (read(fdASFile, argvp, sizeof(char *) * 
(psBuf.pr_argc + 1)) == -1 ) {
                   printf( "Read Failed" );
                   return NULL;
               for ( counter=0; counter < psBuf.pr_argc; counter++ ) {
                   if (lseek(fdASFile, argvp[ counter ], SEEK_SET) == -1) {
                       printf( "2nd LSeek Failed");
                       return NULL;
                   if (read(fdASFile, argStr, 512) == -1) {
                       printf( "Read Of AS File Failed");
                       return NULL;
                   printf( "Got %s.\n", argStr );
   return Py_BuildValue( "s", argStr );

static struct PyMethodDef PSInfoMethods[]={
   { "fullpidinfo", psinfo_fullpidinfo, METH_VARARGS, "Display Full Arg 
Details For A Given PID" },
   { NULL, NULL, 0, NULL }

void initpsinfo(void)

   (void)Py_InitModule("psinfo", PSInfoMethods);