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authorBrooks Moses <bmoses@google.com>2013-12-11 16:58:12 -0800
committerBrooks Moses <bmoses@google.com>2013-12-18 10:52:37 -0800
commitb9ab448f980e296eac21ac65f53783967cc6037b (patch)
tree7e145e47823b6f960a5b4e47559122b265567d12 /misc/sys
parentf889953b44da50bf8a7824c97d09dbe03fd11b83 (diff)
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Add error reporting (via errno) to getauxval().
[BZ 15846] As discussed in the recent thread on my $EXEC_ORIGIN patch and in BZ 15846, getauxval() presently has no unambiguous way of reporting an error condition. It currently returns zero on error, but this may also be a valid result for some auxv entries. As there is no clear invalid result for all current and future auxv entries, this patch sets errno (following a suggestion in the BZ entry). This version of the patch also adds documentation and tests for the value-not-found conditions in getauxval().
Diffstat (limited to 'misc/sys')
-rw-r--r--misc/sys/auxv.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/misc/sys/auxv.h b/misc/sys/auxv.h
index a69250bd52..7aec3a04b8 100644
--- a/misc/sys/auxv.h
+++ b/misc/sys/auxv.h
@@ -27,9 +27,9 @@ __BEGIN_DECLS
/* Return the value associated with an Elf*_auxv_t type from the auxv list
passed to the program on startup. If TYPE was not present in the auxv
- list, returns zero. */
+ list, returns zero and sets errno to ENOENT. */
extern unsigned long int getauxval (unsigned long int __type)
- __THROW __attribute_const__;
+ __THROW;
__END_DECLS