Changes between Initial Version and Version 1 of Ticket #897, comment 22


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Timestamp:
2015-09-24T19:44:11Z (9 years ago)
Author:
daira
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  • Ticket #897, comment 22

    initial v1  
    1010> Obviously if the operating system asserts that the {{{creation time}}} has changed, then we should re-upload.
    1111
    12 It is possible for `ctime` to change but `mtime` not, when the file contents change. In particular, suppose there are two files `foo` and `bar` that have different contents but the same size and `mtime` (for example because they were created at the same time to within the `mtime` resolution). Then, `mv bar foo` will not change `foo`'s `mtime`, but will set its `ctime` to the current time. (Verified on Linux.)
     12It is possible for `ctime` to change but `mtime` not, when the file contents change. In particular, suppose there are two files `foo` and `bar` that have different contents but the same size and `mtime` (because they were last modified at the same time to within the `mtime` resolution). Then, `mv bar foo` will not change `foo`'s `mtime`, but will set its `ctime` to the current time. (Verified on Linux.)