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    SubjectRFC [patch 24/34] PID Virtualization use vpgid_to_pgid function
    Same as previous patch for pids, but here we focus on virtual
    ids that are interpreted as process group ids. Since process
    groups ids can be negative, they are handled as to deal with
    the negative value.

    Signed-off-by: Hubertus Franke <frankeh@watson.ibm.com>
    ---
    fs/fcntl.c | 1 +
    kernel/capability.c | 1 +
    kernel/exit.c | 2 ++
    3 files changed, 4 insertions(+)

    Index: linux-2.6.15/fs/fcntl.c
    ===================================================================
    --- linux-2.6.15.orig/fs/fcntl.c 2006-01-17 08:37:05.000000000 -0500
    +++ linux-2.6.15/fs/fcntl.c 2006-01-17 08:37:06.000000000 -0500
    @@ -267,6 +267,7 @@
    if (err)
    return err;

    + arg = vpgid_to_pgid(arg);
    f_modown(filp, arg, current->uid, current->euid, force);
    return 0;
    }
    Index: linux-2.6.15/kernel/capability.c
    ===================================================================
    --- linux-2.6.15.orig/kernel/capability.c 2006-01-17 08:37:06.000000000 -0500
    +++ linux-2.6.15/kernel/capability.c 2006-01-17 08:37:06.000000000 -0500
    @@ -188,6 +188,7 @@
    if (get_user(pid, &header->pid))
    return -EFAULT;

    + pid = vpgid_to_pgid(pid);
    if (pid && pid != task_pid(current) && !capable(CAP_SETPCAP))
    return -EPERM;

    Index: linux-2.6.15/kernel/exit.c
    ===================================================================
    --- linux-2.6.15.orig/kernel/exit.c 2006-01-17 08:37:06.000000000 -0500
    +++ linux-2.6.15/kernel/exit.c 2006-01-17 08:37:06.000000000 -0500
    @@ -1556,6 +1556,8 @@
    if (options & ~(WNOHANG|WUNTRACED|WCONTINUED|
    __WNOTHREAD|__WCLONE|__WALL))
    return -EINVAL;
    + if (pid != -1)
    + pid = vpgid_to_pgid(pid);
    ret = do_wait(pid, options | WEXITED, NULL, stat_addr, ru);

    /* avoid REGPARM breakage on x86: */
    --

    -
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