system("") function

Question

Created Feb ’17

Replies 1

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Participants 2

Hello! I'm trying to force re-spring a device, but I get this error for using a system("") function. Please help me! I need this re-spring to work! (Im using Objective-C in xcode)

Here's a screenshot: http://imgur.com/gallery/nWHQZ

Answered by DTS Engineer in 217333022

I’m not sure what “re-spring” means but:

Your image references “SpringBoard”, so presumably you’re working on iOS.
```
system
```
is not supported on iOS, and neither is
```
posix_spawn
```
or any other traditional UNIX mechanism to launch child processes.
The iOS sandbox will prevent you from sending signals to other processes.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Answer 1

DTS Engineer OP

Apple

Mar ’17

Accepted Answer

I’m not sure what “re-spring” means but:

Your image references “SpringBoard”, so presumably you’re working on iOS.
```
system
```
is not supported on iOS, and neither is
```
posix_spawn
```
or any other traditional UNIX mechanism to launch child processes.
The iOS sandbox will prevent you from sending signals to other processes.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"