469759f8e4
When the fsck_ffs program cannot fully repair a file system, it will output the message PLEASE RERUN FSCK. However, it does not exit with a non-zero status in this case (contradicting the man page claim that it "exits with 0 on success, and >0 if an error occurs." The fsck rc-script (when running "fsck -y") tests the status from fsck (which passes along the exit status from fsck_ffs) and issues a "stop_boot" if the status fails. However, this is not effective since fsck_ffs can return zero even on (some) errors. Effectively, it is left to a later step in the boot process when the file systems are mounted to detect the still-unclean file system and stop the boot. This change modifies fsck_ffs so that when it cannot fully repair the file system and issues the PLEASE RERUN FSCK message it also exits with a non-zero status. While here, the fsck_ffs man page has also been updated to document the failing exit status codes used by fsck_ffs. Previously, only exit status 7 was documented. Some of these exit statuses are tested for in the fsck rc-script, so they are clearly depended upon and deserve documentation. Reviewed by: mckusick, vangyzen, jilles (manpages) MFC after: 1 week Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D13862
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