[pacman-dev] Checking free space before transaction

[Allan McRae]

On 12/11/10 11:07, Allan McRae wrote:
> So, looking into this further:
>
> getmntent:
> used by glibc, uclibc, cygwin
>
> getmntinfo with statfs:
> used by bsd4.4 (FreeBSD, OpenBSD, OSX)
>
> getmntinfo with statvfs:
> NetBSD
>
> I can work with that... the mount point struct can hold a statfs or
> statvfs object depending on what function we are using. Given the
> entries that we need to access are available in both structs, the rest
> should be transparent.
>
> So what I need to do is:
> 1) figure out how to distinguish between the two getmntinfo versions...

So having a peak at how coreutils does this...  Restating the prototype 
for a function does not create a compiler error.  But stating a modified 
prototype for a function causes an error.  So I need one of those "if 
this compiles" tests.  Should be manageable.

> 2) add a code path for the second getmntinfo
> 3) review what headers need included in each path

Just to put my notes on the list:

NetBSD:
   #include <sys/types.h>
   #include <sys/statvfs.h>

FreeBSD/OSX:
   #include <sys/param.h>
   #include <sys/ucred.h>
   #include <sys/mount.h>

OpenBSD:
   #include <sys/param.h>
   #include <sys/mount.h>

Glibc:
   #include <stdio.h>
   #include <mntent.h>
   #include <sys/statvfs.h>

Fun stuff...

Allan