* Setting reboot type at run time for ARM @ 2015-03-17 21:44 ` Arun Ramamurthy 0 siblings, 0 replies; 6+ messages in thread From: Arun Ramamurthy @ 2015-03-17 21:44 UTC (permalink / raw) To: linux-arm-kernel Hello I would like to specify a reset type just before issuing the reboot command in the kernel. I know the kernel command line parameter can be set as "reboot=w" to indicate warm reset but I want to be able to decide this at run time before issuing a reboot command. What would be the best way to implement this? Modify the reboot command to accept a parameter or is there a standard hook I can use? Arun Ramamurthy ^ permalink raw reply [flat|nested] 6+ messages in thread
* Setting reboot type at run time for ARM @ 2015-03-17 21:44 ` Arun Ramamurthy 0 siblings, 0 replies; 6+ messages in thread From: Arun Ramamurthy @ 2015-03-17 21:44 UTC (permalink / raw) To: Linux Kernel Mailing List, linux-arm-kernel Cc: Dmitry Torokhov, Anatol Pomazau, bcm-kernel-feedback-list@broadcom.com, Ray Jui, Scott Branden, Jonathan Richardson, Arnd Bergmann, Russell King, Olof Johansson Hello I would like to specify a reset type just before issuing the reboot command in the kernel. I know the kernel command line parameter can be set as "reboot=w" to indicate warm reset but I want to be able to decide this at run time before issuing a reboot command. What would be the best way to implement this? Modify the reboot command to accept a parameter or is there a standard hook I can use? Arun Ramamurthy ^ permalink raw reply [flat|nested] 6+ messages in thread
* Setting reboot type at run time for ARM 2015-03-17 21:44 ` Arun Ramamurthy @ 2015-03-18 0:50 ` Florian Fainelli -1 siblings, 0 replies; 6+ messages in thread From: Florian Fainelli @ 2015-03-18 0:50 UTC (permalink / raw) To: linux-arm-kernel On 17/03/15 14:44, Arun Ramamurthy wrote: > Hello > > I would like to specify a reset type just before issuing the reboot > command in the kernel. I know the kernel command line parameter can be > set as "reboot=w" to indicate warm reset but I want to be able to decide > this at run time before issuing a reboot command. What would be the best > way to implement this? Modify the reboot command > to accept a parameter or is there a standard hook I can use? If you use the reboot(2) system call you can already specify a large number of options, for options that are currently not supported by coreutils' reboot or busybox's reboot, you could probably provide a shell script wrapper which calls into either your own reboot implementation or the regular one, would that work? -- Florian ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Setting reboot type at run time for ARM @ 2015-03-18 0:50 ` Florian Fainelli 0 siblings, 0 replies; 6+ messages in thread From: Florian Fainelli @ 2015-03-18 0:50 UTC (permalink / raw) To: Arun Ramamurthy, Linux Kernel Mailing List, linux-arm-kernel Cc: Russell King, Arnd Bergmann, Scott Branden, Ray Jui, Jonathan Richardson, bcm-kernel-feedback-list@broadcom.com, Olof Johansson, Anatol Pomazau, Dmitry Torokhov On 17/03/15 14:44, Arun Ramamurthy wrote: > Hello > > I would like to specify a reset type just before issuing the reboot > command in the kernel. I know the kernel command line parameter can be > set as "reboot=w" to indicate warm reset but I want to be able to decide > this at run time before issuing a reboot command. What would be the best > way to implement this? Modify the reboot command > to accept a parameter or is there a standard hook I can use? If you use the reboot(2) system call you can already specify a large number of options, for options that are currently not supported by coreutils' reboot or busybox's reboot, you could probably provide a shell script wrapper which calls into either your own reboot implementation or the regular one, would that work? -- Florian ^ permalink raw reply [flat|nested] 6+ messages in thread
* Setting reboot type at run time for ARM 2015-03-18 0:50 ` Florian Fainelli @ 2015-03-18 20:58 ` Arun Ramamurthy -1 siblings, 0 replies; 6+ messages in thread From: Arun Ramamurthy @ 2015-03-18 20:58 UTC (permalink / raw) To: linux-arm-kernel On 15-03-17 05:50 PM, Florian Fainelli wrote: > On 17/03/15 14:44, Arun Ramamurthy wrote: >> Hello >> >> I would like to specify a reset type just before issuing the reboot >> command in the kernel. I know the kernel command line parameter can be >> set as "reboot=w" to indicate warm reset but I want to be able to decide >> this at run time before issuing a reboot command. What would be the best >> way to implement this? Modify the reboot command >> to accept a parameter or is there a standard hook I can use? > > If you use the reboot(2) system call you can already specify a large > number of options, for options that are currently not supported by > coreutils' reboot or busybox's reboot, you could probably provide a > shell script wrapper which calls into either your own reboot > implementation or the regular one, would that work? > Thanks Florian. After looking at the sys call documentation, i can see that it passes an argument to the kernel_restart function if I use LINUX_REBOOT_CMD_RESTART2 as the cmd. However as you mentioned the coreutils reboot or busybox's reboot do not support these options so I will write a shell script to wrap the system call. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Setting reboot type at run time for ARM @ 2015-03-18 20:58 ` Arun Ramamurthy 0 siblings, 0 replies; 6+ messages in thread From: Arun Ramamurthy @ 2015-03-18 20:58 UTC (permalink / raw) To: Florian Fainelli, Linux Kernel Mailing List, linux-arm-kernel Cc: Russell King, Arnd Bergmann, Scott Branden, Ray Jui, Jonathan Richardson, bcm-kernel-feedback-list@broadcom.com, Olof Johansson, Anatol Pomazau, Dmitry Torokhov On 15-03-17 05:50 PM, Florian Fainelli wrote: > On 17/03/15 14:44, Arun Ramamurthy wrote: >> Hello >> >> I would like to specify a reset type just before issuing the reboot >> command in the kernel. I know the kernel command line parameter can be >> set as "reboot=w" to indicate warm reset but I want to be able to decide >> this at run time before issuing a reboot command. What would be the best >> way to implement this? Modify the reboot command >> to accept a parameter or is there a standard hook I can use? > > If you use the reboot(2) system call you can already specify a large > number of options, for options that are currently not supported by > coreutils' reboot or busybox's reboot, you could probably provide a > shell script wrapper which calls into either your own reboot > implementation or the regular one, would that work? > Thanks Florian. After looking at the sys call documentation, i can see that it passes an argument to the kernel_restart function if I use LINUX_REBOOT_CMD_RESTART2 as the cmd. However as you mentioned the coreutils reboot or busybox's reboot do not support these options so I will write a shell script to wrap the system call. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-03-18 20:58 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2015-03-17 21:44 Setting reboot type at run time for ARM Arun Ramamurthy 2015-03-17 21:44 ` Arun Ramamurthy 2015-03-18 0:50 ` Florian Fainelli 2015-03-18 0:50 ` Florian Fainelli 2015-03-18 20:58 ` Arun Ramamurthy 2015-03-18 20:58 ` Arun Ramamurthy
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