问题
I know we can use contextIdAtPosition
and taskPortOfContextId
to get the mach_port_t
of the front top app, but when inside some app, we can not use contextIdAtPosition
to get the context id of SpringBoard
(it's at background), so how can we get the mach_port_t
of SpringBoard
? Thank you!
回答1:
according to http://theiphonewiki.com/wiki//System/Library/LaunchDaemons/com.apple.SpringBoard.plist, the SpringBoard has exposed a lot of services. two of them might (or might not) be of your interests:
- "com.apple.iohideventsystem"
- "com.apple.springboard"
Here is the sample code to query the ports by service names.
#include <mach/mach.h>
#include "bootstrap.h"
#include <stdio.h>
#include <stdlib.h>
#define CHECK_MACH_ERROR(a) do {kern_return_t rr = (a); if ((rr) != KERN_SUCCESS) \
{ printf("Mach error %x (%s) on line %d of file %s\n", (rr), mach_error_string((rr)), __LINE__, __FILE__); abort(); } } while (0)
int main(int argc, char **argv, char **envp)
{
mach_port_t bp = MACH_PORT_NULL;
mach_port_t sp = MACH_PORT_NULL;
kern_return_t err = task_get_bootstrap_port(mach_task_self(), &bp);
CHECK_MACH_ERROR(err);
printf("bp:%d\n", bp);
err = bootstrap_look_up(bp, "com.apple.iohideventsystem", &sp);
CHECK_MACH_ERROR(err);
printf("iohideventsystem:%d\n", sp);
err = bootstrap_look_up(bp, "com.apple.springboard", &sp);
CHECK_MACH_ERROR(err);
printf("springboard:%d\n", sp);
// need to deallocate ports before exit
return 0;
}
The output:
my-iPad:~ root# /usr/bin/port_query
bp:519
iohideventsystem:4099
springboard:4355
回答2:
There is a SpringboardService framework.
It has a function SBSSpringBoardServerPort()
which returns Springboard mach port.
Note: Each application may have multiple mach ports, so I am not sure that it's one which you need.
来源:https://stackoverflow.com/questions/21660397/how-to-get-task-port-of-springboard-in-ios7-jailbroken