[LU-12984] Add --newerXY support for lfs find

Related — Wed, 28 Oct 2020 14:08:34 +0000

In regular "find" it is possible to specify a filename to use for a relative timestamp:

-newerXY reference
 Compares the timestamp of the current file with reference. The
 reference argument is normally the name of a file (and one of
 its timestamps is used for the comparison) but it may also be a
 string describing an absolute time. X and Y are placeholders
 for other letters, and these letters select which time belonging
 to how reference is used for the comparison.
 a The access time of the file reference
 B The birth time of the file reference
 c The inode status change time of reference
 m The modification time of the file reference
Some combinations are invalid; for example, it is invalid for X
 to be t. Some combinations are not implemented on all systems;
 for example B is not supported on all systems. If an invalid or
 unsupported combination of XY is specified, a fatal error
 results. Time specifications are interpreted as for the argu‐
 ment to the -d option of GNU date. If you try to use the birth
 time of a reference file, and the birth time cannot be deter‐
 mined, a fatal error message results. If you specify a test
 which refers to the birth time of files being examined, this
 test will fail for any files where the birth time is unknown.

We should enhance Lustre 'lfs find' to support '–newerXY' options.

Whamcloud Community JIRA

[LU-12984] Add --newerXY support for lfs find