Re: [Dazuko-help] Dazuko 3.x and finer gain events

[Lino Sanfilippo]

Robert Minsk wrote:
> I also just realized that I do not get the uid of the user with the new
> dazukofs.  Are there any plans to add uid back in?
>
>
> _______________________________________________
> Dazuko-help mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/dazuko-help
>
>   
Dazukofs is currently evolving. So chances are good that there will be 
other features /
informations available in future versions.
There is also a modified dazukofs version by our company (Avira) shipped 
with the avguard. This
mod is adapted to the needs of our anti-virus software.
Please check future avguard releases for the newest avira mods of dazukofs.
Meanwhile you have to use a workaround to determine the userid of a file 
accessing process.
The following function can be used to find out a process' uid from the 
pid given by dazukofs:


/* this is a workaround since dazukofs does not provide the
* effective user id of the file accessing process (yet) */
static inline int getuid_from_pid(pid_t pid, uid_t *uid)
{
   const char UID_STR[] = "Uid:\t%u\t%u\t%u\t%u";
   const int LINE_LEN = 128;
   const int PROCPATH_LEN = 32;
   FILE *file;
   char procpath[LINE_LEN];
   char line[PROCPATH_LEN];
   char *l;
   int rv = -1;
   uid_t t1, t2, t3;



   snprintf(procpath, sizeof(procpath), "/proc/%u/status", pid);
 

   file = fopen(procpath, "r");
   if (!file)
       return -1;
  
   while((l = fgets(line, sizeof(line), file)) != NULL) {
       if (!strncmp(l, UID_STR, 4)) {
           sscanf(l, UID_STR, uid, &t1, &t2, &t3);
           rv = 0;
           goto out;
       }           
   }
   if (errno)
      fprintf(stderr, "failed to get line from file %s: %s\n", procpath,
           strerror(errno));
out:
   fclose(file);

   return rv;
}


Greetings,
Lino

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