Offene Dateien eines Prozesses

**Lord Kefir** · 16-08-2005, 16:43

Hat jemand eine Ahnung, wie ich in C unter Linux an die offenen Dateien herankommen kann, die zu einem bestimmten Prozess gehören?!

Mfg, Lord Kefir

**Lord Kefir** · 16-08-2005, 21:13

Okay - habe beim googeln nichts gefunden und einfach ein wenig herumgefrickelt. Hier mein Ansatz (nicht schön - habe es einfach so runtergerattert):

Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>

#define BUFFER_SIZE 500

/* ----------------------------------------------
     function: isnumeric
   ---------------------------------------------- */
bool
isnumeric (const char *string)
{
  short i = 0;
  bool result = true;

  while (i < strlen (string) && result)
    {
      if (!isdigit (string[i]))
 result = false;
      ++i;
    }

  return (result);
}

/* ----------------------------------------------
     function: main
   ---------------------------------------------- */
int
main (int argc, char *argv[])
{
  DIR *dir1, *dir2;
  struct dirent *dir_info1, *dir_info2;
  char filename1[100], filename2[100];
  char buffer[BUFFER_SIZE];
  struct stat attr;

  // /proc öffnen:
  if ((dir1 = opendir ("/proc")) == NULL)
    {
      fprintf (stderr, "Fehler.\n");
      exit (1);
    }

  // alle numerischen Ordner durchgehen:
  while ((dir_info1 = readdir (dir1)) != NULL)
    {
      if (isnumeric (dir_info1->d_name))
 {
   sprintf (filename1, "/proc/%s/fd/", dir_info1->d_name);
          // alle Dateien unter /proc/pid/fd/ prüfen:
   if ((dir2 = opendir (filename1)) != NULL)
     {
       while ((dir_info2 = readdir (dir2)) != NULL)
  {
    if (isnumeric (dir_info2->d_name))
      {
        sprintf (filename2, "%s%s", filename1,
          dir_info2->d_name);
        memset (buffer, 0, BUFFER_SIZE);
        readlink (filename2, buffer, BUFFER_SIZE);
        if ((stat (buffer, &attr) == 0))
   {
     if (attr.st_mode & S_IFREG)
       {
         printf ("%s\n", buffer);
       }
   }
      }
  }
       closedir (dir2);
     }
 }
    }
  closedir (dir1);

  return (0);
}

Mfg, Lord Kefir