[Bug libc/10353] New: Methods for deleting all file descriptors greater than given integer

["martinrb at google dot com" <sourceware-bugzilla at sourceware dot org>]

Recent Solaris provides a way to delete all file descriptors
greater than a given integer, and provides a way to ask
posix_spawn to do so.  I believe glibc should implement these extensions.

Both of the big programs I have worked on, xemacs and openjdk,
have written their own way to do this.

extern int posix_spawn_file_actions_addclosefrom_np(
	posix_spawn_file_actions_t *file_actions,
	int lowfiledes);

extern void closefrom(int);

http://docs.sun.com/app/docs/doc/819-2243/posix-spawn-file-actions-addclosefrom-np-3c?l=ja&a=view

http://docs.sun.com/app/docs/doc/819-2243/closefrom-3c?l=ja&a=view

The functionality that has been added to glibc allowing FD_CLOSE_ON_EXEC
to be specified at time of creation of the fd does help (thank you)
but it is not sufficient for "open" programs like the JDK where 
arbitrary third party native code may be concurrently opening file 
descriptors while creating a subprocess.

-- 
           Summary: Methods for deleting all file descriptors greater than
                    given integer
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: martinrb at google dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10353

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