Re: nanosecond support for stat

[Mike Stump <mikestump at comcast dot net>]

On Jan 12, 2012, at 3:07 PM, Eric Blake wrote:
> Actually, it would be better to go with the definitions given by POSIX:
> 
> struct timespec st_atim Last data access timestamp.

That would make a nice follow-on patch.

Linux does:

#ifdef __USE_MISC
    /* Nanosecond resolution timestamps are stored in a format                                 
       equivalent to 'struct timespec'.  This is the type used                                 
       whenever possible but the Unix namespace rules do not allow the                         
       identifier 'timespec' to appear in the <sys/stat.h> header.                             
       Therefore we have to handle the use of this header in strictly                          
       standard-compliant sources special.  */
    struct timespec st_atim;            /* Time of last access.  */
    struct timespec st_mtim;            /* Time of last modification.  */
    struct timespec st_ctim;            /* Time of last status change.  */
# define st_atime st_atim.tv_sec        /* Backward compatibility.  */
# define st_mtime st_mtim.tv_sec
# define st_ctime st_ctim.tv_sec
#else
    __time_t st_atime;                  /* Time of last access.  */
    unsigned long int st_atimensec;     /* Nscecs of last access.  */
    __time_t st_mtime;                  /* Time of last modification.  */
    unsigned long int st_mtimensec;     /* Nsecs of last modification.  */
    __time_t st_ctime;                  /* Time of last status change.  */
    unsigned long int st_ctimensec;     /* Nsecs of last status change.  */
#endif


:-)  Which is why I didn't do anymore.  We've merely implemented the second case of the #ifdef.  I've left the first case for someone that wants to do the additional work.