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Operating Systems AIX how to pre-determine if a reboot is required? Post 75274 by bakunin on Thursday 16th of June 2005 12:21:55 PM
Old 06-16-2005
Ok, i copied two sample files to a directory and did as I said. The first example is a file requiring no reboot:

Code:
0 061616135805 2
bos.adt.include.5.1.0.67.bff 4 R S bos.adt {
bos.adt.include 05.01.0000.0067 1 N U en_US Base Application Development Include
 Files
[
*ifreq bos.64bit (5.1.0.0) 5.1.0.50
*ifreq bos.adt.syscalls (5.1.0.0) 5.1.0.50
<rest snipped>

now a file requiring a reboot:

Code:
0 061616181805 2
bos.mp64.5.1.0.66.bff 4 R S bos.mp64 {
bos.mp64 05.01.0000.0066 1 b U en_US Base Operating System 64-bit Multiprocessor
 Runtime
[
*ifreq bos.64bit (5.1.0.0) 5.1.0.50
*ifreq bos.adt.include (5.1.0.0) 5.1.0.63
<rest snipped>

Notice the difference in the third lines of the outputs:

"bos.adt.include 05.01.0000.0067 1 N U en_US...."

versus:

"bos.mp64 05.01.0000.0066 1 b U en_US...."

This "b" means "have to reboot afterwards". And, yes, it is failsafe because this flag is what is making installp initiating the reboot in first place.

bakunin
 

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reboot(3C)						   Standard C Library Functions 						reboot(3C)

NAME
reboot - reboot system or halt processor SYNOPSIS
#include <sys/reboot.h> int reboot(int howto, char *bootargs); DESCRIPTION
The reboot() function reboots the system. The howto argument specifies the behavior of the system while rebooting and is a mask con- structed by a bitwise-inclusive-OR of flags from the following list: RB_AUTOBOOT The machine is rebooted from the root filesystem on the default boot device. This is the default behavior. See boot(1M) and kernel(1M). RB_HALT The processor is simply halted; no reboot takes place. This option should be used with caution. RB_ASKNAME Interpreted by the bootstrap program and kernel, causing the user to be asked for pathnames during the bootstrap. RB_DUMP The system is forced to panic immediately without any further processing and a crash dump is written to the dump device (see dumpadm(1M)) before rebooting. Any other howto argument causes the kernel file to boot. The interpretation of the bootargs argument is platform-dependent. RETURN VALUES
Upon successful completion, reboot() never returns. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The reboot() function will fail if: EPERM The {PRIV_SYS_CONFIG} privilege is not asserted in the effective set of the calling process. SEE ALSO
Intro(1M), boot(1M), dumpadm(1M), halt(1M), init(1M), kernel(1M), reboot(1M), uadmin(2) SunOS 5.11 22 Mar 2004 reboot(3C)
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