On current/amd64, fsdb(8) fails like this:
# fsdb -f /dev/rsd0l
** /dev/rsd0l
Editing file system `/dev/rsd0l'
Last Mounted on /usr/xenocara
current inode: directory
I=2 MODE=40755 SIZE=512
MTIME=Aug 8 19:27:56 2016 [0 nsec]
CTIME=Aug 8 19:27:56 2016 [0 nsec]
ATIME=Aug 8 19:27:56 2016 [0 nsec]
OWNER=root GRP=wheel LINKCNT=2 FLAGS=0 BLKCNT=4 GEN=f3a7fd9
Abort trap (core dumped)
ktrace says it's a pledge fault:
[...]
97279 fsdb NAMI "/root/.terminfo"
97279 fsdb PLDG stat, "rpath", errno 1 Operation not permitted
97279 fsdb PSIG SIGABRT SIG_DFL code <2036643296>
97279 fsdb NAMI "fsdb.core"
fsdb(8) uses fsck(8) code to do its work (as mentioned in the manpage).
Apparently, the pledge(2) setup of fsdb(8) is done in fsck_ffs/setup.c;
while probably correct for fsck, this seems to be what makes fsdb crash:
if (!hotroot()) {
#ifndef SMALL
if (pledge("stdio getpw", NULL) == -1)
err(1, "pledge");
#else
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
#endif
(There is a more generous pledge above that, this is a restriction.)
I don't know what SMALL fsck is and what hotroot means exactly,
so I will leave a proper fix to someone else,
but disabling those lines makes fsdb not crash.
Jan
