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Child process on iOS

Hello, On macOS, I can include a second executable in the app bundle, which the main executable can launch and communicate with via pipes (standard input/output). I've done this before (with app sandbox inheritance). I've read on other forums that this is not possible on iOS. Is that correct? I tried popen() and it always fails with the error "Operation not permitted." 😔 I just wanted to confirm before I move on to using frameworks. Thanks for your time.
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by mansourmoufid.
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Automatic code signing

Hello, I've always used a package manager (pkgsrc), it installs to my home directory (~/pkg). I noticed today that if I manually copy a binary (not build by the package manager) to that location (~/pkg/bin), it gets terminated by EXC_BAD_ACCESS (Code Signature Invalid), but runs fine in its original location. I was confused because I don't remember signing anything in there. So Xcode clang is signing everything by default: % codesign --display --verbose ~/pkg/bin/python ... Format=Mach-O thin (arm64) CodeDirectory v=20400 size=514 flags=0x20002(adhoc,linker-signed) hashes=13+0 location=embedded Signature=adhoc ... "linker-signed"..? I guess I have to "re-link" binaries every time they get moved? Since the linker is doing this on its own, maybe the "install" utility could do that for us? Update: Nevermind. TIL about -adhoc_codesign and -no_adhoc_codesign linker options. 😅
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by mansourmoufid.
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