25 lines
676 B
Rust
25 lines
676 B
Rust
// ignore-windows: Windows does not have a global environ list that the program can access directly
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#[cfg(any(target_os = "linux", target_os = "freebsd"))]
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fn get_environ() -> *const *const u8 {
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extern "C" {
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static mut environ: *const *const u8;
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}
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unsafe { environ }
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}
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#[cfg(target_os = "macos")]
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fn get_environ() -> *const *const u8 {
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extern "C" {
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fn _NSGetEnviron() -> *mut *const *const u8;
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}
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unsafe { *_NSGetEnviron() }
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}
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fn main() {
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let pointer = get_environ();
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let _x = unsafe { *pointer };
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std::env::set_var("FOO", "BAR");
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let _y = unsafe { *pointer }; //~ ERROR dereferenced after this allocation got freed
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}
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