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Switch Parameters
The following parameters are simple on/off switches within the kernel that allow or disallow certain features, such as whether shells that set the user ID to the superuser are allowed:
- dump_all_pages - controls page dumping during kernel panics.
- panic_on_sbe - controls special factory debugging mode.
- sbe_log_errors - controls system logging of single bit errors.
- sbe_mfr_override - overrides default action of disabling single bit errors.
- sbe_report_cons - controls single bit error console reporting.
- corepluspid - controls core filenames.
- r4k_div_patch - controls patch code for r4kpp binaries.
- mload_auto_rtsyms - controls loading of the kernel symbol table.
- xpg4_sticky_dir - controls removal of files in "sticky" directories.
- tty_auto_strhold - controls the setting of STRHOLD on tty/pty lines.
- reset_limits_on_exec - controls resetting of rlimit values on new setuid processes.
- ip26_allow_ucmem - controls whether to allow access to uncached system memory on Power Indigo2 systems.
- restrict_fastprof - controls whether users can do fast (1ms) user level profiling.
- reboot_on_panic - specifies that the system should automatically reboot after a kernel panic.
- svr3pipe - controls whether SVR3.2 or SVR4 pipes are used.
- nosuidshells - when set to 0, allows applications to create superuser-privileged shells. When set to any value other than 0, such shells are not permitted.
- posix_tty_default - if the value of this switch is 0, the default Silicon Graphics line disciplines are used. If the value is set to 1, POSIX line disciplines and settings are used.
- restricted_chown - allows you to decide whether you want to use BSD UNIX style chown(2) system call or the System V style.
- use_old_serialnum - When set to 1, forces the kernel to use the old method of calculating a 32-bit serial number for sysinfo -s. This variable affects only Onyx and Challenge L or XL systems.
- subnetsarelocal - When set to 1, other subnets of a directly-connected subnetted network are considered to be local.
Note that all the above listed parameters are enforced system-wide. It is not possible to select different values on a per-process basis.
- dump_all_pages
-
- panic_on_sbe
-
- sbe_log_errors
-
- sbe_mfr_override
-
- sbe_report_cons
-
- corepluspid
-
- r4k_div_patch
-
- mload_auto_rtsyms
-
- xpg4_sticky_dir
-
- tty_auto_strhold
-
- reset_limits_on_exec
-
- ip26_allow_ucmem
-
- restrict_fastprof
-
- reboot_on_panic
-
- svr3pipe
-
- nosuidshells
-
- posix_tty_default
-
- restricted_chown
-
- use_old_serialnum
-
- subnetsarelocal
-
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