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Comment explaining why CLOSE_RANGE_CLOEXEC is safe for fexecve binaries in os_spawn

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Andrea Mazzoleni 2026-08-10 12:52:37 +02:00
parent c4d509438f
commit 19173754ec
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os/unix.c
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@ -1282,6 +1282,8 @@ pid_t os_spawn(char** argv, int* stdout_read_fd, int* stderr_read_fd, const char
*
* fallback: if it fails, we assume to be still safe, as all fds and
* sockets should be already created with CLOEXEC.
*
* For binaries fd can be set as CLOEXEC because fexecve loads the ELF image into memory before closing descriptors.
*/
close_range(3, ~0U, CLOSE_RANGE_CLOEXEC);
#endif