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Message-ID: <49A7232C.6050808@redhat.com> Date: Thu, 26 Feb 2009 15:18:04 -0800 From: Ulrich Drepper <drepper@...hat.com> To: Linux Kernel <linux-kernel@...r.kernel.org> Subject: filesystem time stamp resolution -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 How can code at userlevel (e.g., glibc) determine the resolution of the a filesystem timestamp? Boundary condition: - - I cannot create or modify a file since the information must also be available for filesystems where the caller has no write permission - - it has to work going forward (i.e., hardcoding information is no good idea) One acceptable solution (for me) would be to have directories for the filesystem types under /proc/fs (or /sys/fs) which show this information. E.g.: /proc/fs/ext4/timestamp-resolution Measured in nano-seconds or so. As a bonus have symlinks like /proc/fs/ef53 -> /proc/fs/ext4 (i.e., map the superblock magic number to a name. But I can live with this missing.) As a second bonus any help for network filesystems would be good but. Do I miss anything that is there already? - -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkmnIywACgkQ2ijCOnn/RHRSDgCfUep/fJohBr8kI+iuEFbanL5C oXYAn03tnvPse68ewluvH5qrqJj02AEG =W6ln -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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