more of the same:
$ ktrace ncheck_ffs /dev/tty
Abort trap (core dumped)
$ kdump | tail
65350 ncheck_ffs CALL open(0xd76b761d460,0<O_RDONLY>)
65350 ncheck_ffs NAMI "/dev/tty"
65350 ncheck_ffs RET open 3
65350 ncheck_ffs CALL fstat(3,0x7f7ffffef100)
65350 ncheck_ffs STRU struct stat { dev=1040, ino=1280, mode=crw-rw-rw- ,
nlink=1, uid=0<"root">, gid=0<"wheel">, rdev=256, atime=1464476868<"May 29
01:07:48 2016">.691119578, mtime=1464466717<"May 28 22:18:37 2016">.835647187,
ctime=1464466717<"May 28 22:18:37 2016">.835647187, size=0, blocks=0,
blksize=65536, flags=0x0, gen=0x0 }
65350 ncheck_ffs RET fstat 0
65350 ncheck_ffs CALL ioctl(3,DIOCGDINFO,0xd76b7623100)
65350 ncheck_ffs PLDG ioctl, "ioctl", errno 1 Operation not permitted
65350 ncheck_ffs PSIG SIGABRT SIG_DFL
65350 ncheck_ffs NAMI "ncheck_ffs.core"
remove the early pledge and leave the pledge "stdio" right after
DIOCGDINFO.
Index: ncheck_ffs.c
===================================================================
RCS file: /var/cvs/src/sbin/ncheck_ffs/ncheck_ffs.c,v
retrieving revision 1.52
diff -u -p -r1.52 ncheck_ffs.c
--- ncheck_ffs.c 23 Nov 2015 19:19:30 -0000 1.52
+++ ncheck_ffs.c 28 May 2016 23:16:37 -0000
@@ -510,9 +510,6 @@ main(int argc, char *argv[])
char *ep;
int c, i;
- if (pledge("stdio rpath disklabel", NULL) == -1)
- err(1, "pledge");
-
while ((c = getopt(argc, argv, "af:i:ms")) != -1)
switch (c) {
case 'a':
