linker: changes to init work arounds
Change three things regarding the work around to the fact that init is
special:
1) Only first stage init is special, so we change the check to include
accessing /proc/self/exe, which if is available, means that we're
not first stage init and do not need any work arounds.
2) Fix the fact that /init may be a symlink and may need readlink()
3) Suppress errors from realpath_fd() since these are expected to fail
due to /proc not being mounted.
Bug: 80395578
Test: sailfish boots without the audit generated from calling stat()
on /init and without the errors from realpath_fd()
Change-Id: I266f1486b142cb9a41ec791eba74122bdf38cf12
diff --git a/linker/linker_utils.h b/linker/linker_utils.h
index b15082d..34a597b 100644
--- a/linker/linker_utils.h
+++ b/linker/linker_utils.h
@@ -55,4 +55,4 @@
off64_t page_start(off64_t offset);
size_t page_offset(off64_t offset);
bool safe_add(off64_t* out, off64_t a, size_t b);
-bool is_init();
+bool is_first_stage_init();