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SubjectRe: [patch 6/7] Add common orderly_poweroff()
On Thu, 10 May 2007 16:57:14 -0700 Jeremy Fitzhardinge wrote:

> --- a/kernel/sys.c
> +++ b/kernel/sys.c
> @@ -2208,3 +2208,61 @@ asmlinkage long sys_getcpu(unsigned __us
> +
> +/**
> + * Trigger an orderly system poweroff

* orderly_poweroff - Trigger an orderly system poweroff

> + * @force: force poweroff if command execution fails
> + *
> + * This may be called from any context to trigger a system shutdown.
> + * If the orderly shutdown fails, it will force an immediate shutdown.
> + */
> +int orderly_poweroff(bool force)
> +{
> + int argc;
> + char **argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
> + static char *envp[] = {
> + "HOME=/",
> + "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
> + NULL
> + };
> + int ret = -ENOMEM;
> + struct subprocess_info *info;
> +
> + if (argv == NULL) {
> + printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
> + __func__, poweroff_cmd);
> + goto out;
> + }
> +
> + info = call_usermodehelper_setup(argv[0], argv, envp);
> + if (info == NULL) {
> + argv_free(argv);
> + goto out;
> + }
> +
> + call_usermodehelper_setcleanup(info, argv_cleanup);
> +
> + ret = call_usermodehelper_exec(info, -1);
> +
> + out:
> + if (ret && force) {
> + printk(KERN_WARNING "Failed to start orderly shutdown: "
> + "forcing the issue\n");
> +
> + /* I guess this should try to kick off some daemon to
> + sync and poweroff asap. Or not even bother syncing
> + if we're doing an emergency shutdown? */
> + emergency_sync();
> + kernel_power_off();
> + }
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(orderly_poweroff);


---
~Randy
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