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ACPI: detect invalid argument written to /proc/acpi/alarm

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/proc/acpi/alarm can't be set correctly, here is a sample:

[root@localhost /]# echo "2006 09" > /proc/acpi/alarm
[root@localhost /]# cat /proc/acpi/alarm
2007-12-09 09:09:09
[root@localhost /]# echo "2006 04" > /proc/acpi/alarm
[root@localhost /]# cat /proc/acpi/alarm
2007-12-04 04:04:04
[root@localhost /]#

Obviously, it is wrong, it should consider it as an invalid input.

after this patch:

[root@localhost /]# echo "2008 09" > /proc/acpi/alarm
-bash: echo: write error: Invalid argument
[root@localhost /]#

Signed-off-by: Yi Yang <yi.y.yang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Signed-off by Yi Yang 2007-12-27 21:50:42 -05:00 committed by Len Brown
parent c68cb23dde
commit 975c30257e
1 changed files with 5 additions and 0 deletions
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5
drivers/acpi/sleep/proc.c
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@ -178,6 +178,9 @@ static int get_date_field(char **p, u32 * value)
* Try to find delimeter, only to insert null. The end of the
* string won't have one, but is still valid.
*/
if (*p == NULL)
return result;
next = strpbrk(*p, "- :");
if (next)
*next++ = '\0';
@ -190,6 +193,8 @@ static int get_date_field(char **p, u32 * value)
if (next)
*p = next;
else
*p = NULL;
return result;
}