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| /freebsd-11-stable/usr.bin/mkimg/ | ||
| H A D | image.c | diff 274410 Tue Nov 11 22:12:17 MST 2014 marcel SEEK_DATA has interesting behaviour for sparse files on ZFS. A sparse file with 128K of random data and truncated to 800K can have SEEK_DATA return -1 when given an offset of 128K. On UFS, the SEEK_DATA returns 800K (the size of the file). SEEK_HOLE on ZFS seems to behave the same as UFS. To handle this, map -1 to the size of the file (`end') when lseek returns this for either SEEK_HOLE or SEEK_DATA. When sparse files are not supported by the file system both `hole' and `data' will now be equal to `end' and we will treat the entire file as data. This way, the -1 return for SEEK_DATA on ZFS will end up doing the right thing. Reported by: gjb@ MFC after: 3 days |
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