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DynamicLoader: Make heuristic for running directly actually correct

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When we run directly the dynamic loader, we shouldn't rely on the passed
program path to be run, but rather on whether the main program fd number
is not -1, because the kernel will set it to a non-negative number if it
exists.

To test that the heuristic is working correctly, the /usr/lib/Loader.so
file can be copied to /tmp/Loader.so and then be invoked from that path.
This commit is contained in:
Liav A 2023-10-21 13:17:20 +03:00 • committed by Andrew Kaster
parent 69b97fe318
commit a8601b4ac7
1 changed files with 1 additions and 1 deletions
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2
Userland/DynamicLoader/main.cpp
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@ -136,7 +136,7 @@ void _entry(int argc, char** argv, char** envp)
}
}
if (main_program_path == "/usr/lib/Loader.so"sv) {
if (main_program_fd == -1) {
// We've been invoked directly as an executable rather than as the
// ELF interpreter for some other binary. The second argv string should
// be the path to the ELF executable, and if we don't have enough strings in argv