diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-12-11 12:09:03 +0000 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2016-01-25 10:43:55 +0000 |
| commit | 1a2d4705cce34d293f510c482893cf7d705d8785 (patch) | |
| tree | 1b365b984b7513dbcdaea17047ebf1cc452ec6b5 /scripts | |
| parent | 423220fb2eb853ab53e7cadfc41b8f7a37a89507 (diff) | |
scripts: recordmcount: break hardlinks
commit dd39a26538e37f6c6131e829a4a510787e43c783 upstream.
recordmcount edits the file in-place, which can cause problems when
using ccache in hardlink mode. Arrange for recordmcount to break a
hardlinked object.
Link: http://lkml.kernel.org/r/E1a7MVT-0000et-62@rmk-PC.arm.linux.org.uk
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/recordmcount.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index 650ecc83d7d7..26f0cd2c8e9a 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -194,6 +194,20 @@ 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; } |