Re: sysctl and panic
On 2020-08-05, Stuart Henderson wrote: > On 2020-08-04, Sven F. wrote: >> Dear readers, >> >> About to upgrade devices, >> the device did not reboot on panic (6.4 stable) >> and i ' d like to see kernel crash in new version >> >> # sysctl -w ddb.panic=1 >> sysctl: ddb.panic: Operation not permitted >> >> wait what ?? >> >> # id >> uid=0(root) gid=0(wheel) groups=0(wheel), 2(kmem), 3(sys), 4(tty), >> 5(operator), 20(staff), 31(guest) >> >> mkay .. >> >> Is this expected and can be set only early in boot ? >> >> is ddb.panic=0 still supported ? >> >> Thank you for reading . >> >> > > $ man -k any=ddb.console similar for ddb.panic of course. :) > sysctl(2) - get or set system information > ddb(4) - kernel debugger > pgs(4/macppc) - programmer's switch > sysbutton(4/macppc) - Xserve G4 and G5 front system identifier button > securelevel(7) - securelevel and its effects > boot, boot.conf(8/amd64) - amd64-specific second-stage bootstrap > boot, boot.conf(8/hppa) - hppa-specific bootstrap > boot, boot.conf(8/i386) - i386-specific second-stage bootstrap > boot, boot.conf(8/landisk) - landisk-specific second-stage bootstrap > boot_sparc64(8/sparc64) - sparc64 system bootstrapping procedures > > $ man securelevel > SECURELEVEL(7)Miscellaneous Information Manual SECURELEVEL(7) > > NAME > securelevel – securelevel and its effects > [...] > > >
Re: sysctl and panic
On 2020-08-04, Sven F. wrote: > Dear readers, > > About to upgrade devices, > the device did not reboot on panic (6.4 stable) > and i ' d like to see kernel crash in new version > > # sysctl -w ddb.panic=1 > sysctl: ddb.panic: Operation not permitted > > wait what ?? > > # id > uid=0(root) gid=0(wheel) groups=0(wheel), 2(kmem), 3(sys), 4(tty), > 5(operator), 20(staff), 31(guest) > > mkay .. > > Is this expected and can be set only early in boot ? > > is ddb.panic=0 still supported ? > > Thank you for reading . > > $ man -k any=ddb.console sysctl(2) - get or set system information ddb(4) - kernel debugger pgs(4/macppc) - programmer's switch sysbutton(4/macppc) - Xserve G4 and G5 front system identifier button securelevel(7) - securelevel and its effects boot, boot.conf(8/amd64) - amd64-specific second-stage bootstrap boot, boot.conf(8/hppa) - hppa-specific bootstrap boot, boot.conf(8/i386) - i386-specific second-stage bootstrap boot, boot.conf(8/landisk) - landisk-specific second-stage bootstrap boot_sparc64(8/sparc64) - sparc64 system bootstrapping procedures $ man securelevel SECURELEVEL(7)Miscellaneous Information Manual SECURELEVEL(7) NAME securelevel – securelevel and its effects [...]
Re: sysctl and panic
On Tue, Aug 4, 2020 at 7:25 PM Philip Guenther wrote: > > On Tue, Aug 4, 2020 at 12:23 PM Sven F. wrote: > ... >> >> # sysctl -w ddb.panic=1 >> sysctl: ddb.panic: Operation not permitted > > ... >> >> Is this expected and can be set only early in boot ? > > > Yes, exactly. Read the securelevel(7) or sysctl(2) manpages for details. > > >> >> is ddb.panic=0 still supported ? > > > Yes. > > Philip Guenther Thank you for your answer. -- -- - Knowing is not enough; we must apply. Willing is not enough; we must do
Re: sysctl and panic
On Tue, Aug 4, 2020 at 12:23 PM Sven F. wrote: ... > # sysctl -w ddb.panic=1 > sysctl: ddb.panic: Operation not permitted ... > Is this expected and can be set only early in boot ? > Yes, exactly. Read the securelevel(7) or sysctl(2) manpages for details. > is ddb.panic=0 still supported ? > Yes. Philip Guenther
sysctl and panic
Dear readers, About to upgrade devices, the device did not reboot on panic (6.4 stable) and i ' d like to see kernel crash in new version # sysctl -w ddb.panic=1 sysctl: ddb.panic: Operation not permitted wait what ?? # id uid=0(root) gid=0(wheel) groups=0(wheel), 2(kmem), 3(sys), 4(tty), 5(operator), 20(staff), 31(guest) mkay .. Is this expected and can be set only early in boot ? is ddb.panic=0 still supported ? Thank you for reading .
