proc_nice() changes the priority of the current
process by the amount specified in increment
. A
positive increment
will lower the priority of the
current process, whereas a negative increment
will raise the priority.
proc_nice() is not related to proc_open() and its associated functions in any way.
如果成功则返回 TRUE,失败则返回 FALSE。 If an error occurs, like the user lacks permission to change the priority, an error of level E_WARNING is also generated.