On Tue, Dec 01, 2015 at 06:16:43PM +0000, Russell King - ARM Linux wrote:
> On Tue, Dec 01, 2015 at 12:22:12PM -0500, Steven Rostedt wrote:
> > I guess another solution is to do a copy instead of modifying in place
> > if it detects the multiple hard link?
>
> That would be the "transparent" solution. If you think it's worth
> persuing, I'll have a go at fixing recordmcount to do that.
Well, copying the file is easy - I've tested this and the linker
appears happy with the result:
scripts/recordmcount.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index 698768bdc581..91705ef30402 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -211,6 +211,20 @@ static void *mmap_file(char const *fname)
addr = umalloc(sb.st_size);
uread(fd_map, addr, sb.st_size);
}
+ if (sb.st_nlink != 1) {
+ /* file is hard-linked, break the hard link */
+ close(fd_map);
+ if (unlink(fname) < 0) {
+ perror(fname);
+ fail_file();
+ }
+ fd_map = open(fname, O_RDWR | O_CREAT, sb.st_mode);
+ if (fd_map < 0) {
+ perror(fname);
+ fail_file();
+ }
+ uwrite(fd_map, addr, sb.st_size);
+ }
return addr;
}
--
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
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