Public bug reported:
Binary package hint: uptimed
I've lost my uprecords many times now on power loss or hard reset. Today
I looked at the code and the code in urec.c does:
f = fopen(FILE_RECORDS".tmp", "w");
// updates the file here
fclose(f);
rename(FILE_RECORDS, FILE_RECORDS".old");
rename(FILE_RECORDS".tmp", FILE_RECORDS);
AFAICT, this is exactly the wrong way to do it on ext4, where there is
special logic to make renames *over* files sort of atomic. The minimal
change is to remove the ".old" logic completely, but that may hurt the
situation on other filesystems (ext2, maybe).
** Affects: uptimed (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/793129
Title:
Records are lost on crash/power loss
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