LinuxQuestions.org - Finding process path

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- - Finding process path (https://www.linuxquestions.org/questions/solaris-opensolaris-20/finding-process-path-268677/)

praj_linux

12-21-2004 02:08 AM

Finding process path

Hi,
I am having difficulty in finding process path.

On Linux, I was doing it using
readlink("/proc/self/exe", szAppPath, MAX_PATH);

or

sprintf(szStr, "/proc/%d/exe", nProcID);
readlink(szStr, szAppPath, MAX_PATH);

But on Solaris 9 x86 platform, this function fails,
as there is no "exe" entry in /proc/self.

Is there any other way to find the process path?.

Praj.

jlliagre

12-21-2004 03:45 AM

Here's one way:

Code:

pmap <process-id> | head -2 | tail -1 | nawk '{print $4}'

praj_linux

12-21-2004 03:57 AM

:confused:

I want it programmatically.

jlliagre

12-21-2004 06:32 AM

Well, I did it programmatically ... with shell and a piece of awk ;)

If by programmatically you mean you want it in C, what about:

Code:

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <unistd.h>



char *getpath(int pid)

{

        FILE *fp;

        char command[128];

        char output[64];

        char reply[32];

        strcpy(reply, "");

        sprintf(output, "/tmp/.path.%d", pid);

        sprintf(command, "/usr/proc/bin/pmap %d | head -2 | tail -1 | nawk '{print $4}' >%s", pid, output);

        system(command);

        if((fp=fopen(output, "r"))!=NULL)

        {

                fgets(reply, 32, fp);

                fclose(fp);

                unlink(output);

        }

        return(reply);

}



main(int argc, char **argv)

{

        printf("%s", getpath(atoi(argv[1])));

}

praj_linux

12-21-2004 06:55 AM

Thanks a lot.

But it prints some brackets
[

I am working on

Sun Solaris 9 - x86 Platform Edition
gcc version 3.3.2
GNU ld version 2.11.2
GNU Make 3.80

Am I on the wrong track.

jlliagre

12-21-2004 10:01 AM

Here's a slightly better version that should work for you:

Code:

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <unistd.h>



char *getpath(int pid)

{

  FILE *fp;

  char command[256];

  char output[64];

  char reply[32];

  strcpy(reply, "");

  sprintf(output, "/tmp/.path.%d", pid);

  sprintf(command, "/usr/proc/bin/pmap %d | nawk '\n{\nif(substr($3,3,1)==\"x\") {\nprint $4\nexit(0);\n}\n}\n'>%s",

    pid, output);

  system(command);

  if((fp=fopen(output, "r"))!=NULL)

  {

    fgets(reply, 32, fp);

    fclose(fp);

    unlink(output);

  }

  return(reply);

}



main(int argc, char **argv)

{

  printf("%s", getpath(atoi(argv[1])));

}

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