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st_dev in struct stat

From: Pino Toscano
Subject: st_dev in struct stat
Date: Mon, 10 Jan 2011 01:11:33 +0100
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just looking at a recent build failure in Debian, "rdfind".
There's some code like:

  struct Fileinfostat {
    filesizetype st_size;//size
    unsigned long st_ino;//inode
    unsigned long st_dev;//device

  #include "FileInfo.hh"
  #include <sys/stat.h>
  struct stat info;
  instance_of_struct_Fileinfostat.st_dev = info.st_dev;

Such code (a simplified version of which is attached) fails to compile 
on Hurd, because in bits/stat.h there is:
struct stat
    __fsid_t st_fsid;           /* File system ID.  */
#define st_dev  st_fsid

Is this allowed by POSIX (most probly I'm missing the right part(s) of 
If not, would a "fix" for the above be swapping member and define, like:

    __fsid_t st_dev;           /* File system ID.  */
#define st_fsid  st_dev

Pino Toscano

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