Messages in this thread | | | Date | Mon, 29 Dec 2003 04:55:01 +0000 (GMT) | From | Paul Jakma <> | Subject | chmod of active swap file blocks |
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Hi,
Trying to chmod a file being used for swap causes chmod() to block, with permissions change /not/ having taken effect, until the swap file is swapoff'd, at which point chmod() carries on and chmod (the command) finishes.
# swapon /.swapfile # cat /proc/swaps Filename Type Size Used Priority /dev/ide/host0/bus0/target0/lun0/part1 partition 200772 51748 -1 /.swapfile file 131064 0 -5 # strace chmod g-w /.swapfile 2> /tmp/strace-chmod & [3] 29208 # tail /tmp/strace-chmod [ snip ] stat64("/.swapfile", {st_mode=S_IFREG|0600, st_size=134217728, ...}) = 0 chmod("/.swapfile", 0600 # swapoff /.swapfile # [3] Done strace chmod g-w /.swapfile 2>/tmp/strace-chmod
NB: no, i dont use devfs :) (just same namespace.)
regards, -- Paul Jakma paul@clubi.ie paul@jakma.org Key ID: 64A2FF6A warning: do not ever send email to spam@dishone.st Fortune: Save energy: Drive a smaller shell. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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