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| author | Brooks Moses <bmoses@google.com> | 2013-12-11 16:58:12 -0800 |
|---|---|---|
| committer | Brooks Moses <bmoses@google.com> | 2013-12-18 10:52:37 -0800 |
| commit | b9ab448f980e296eac21ac65f53783967cc6037b (patch) | |
| tree | 7e145e47823b6f960a5b4e47559122b265567d12 /manual/startup.texi | |
| parent | f889953b44da50bf8a7824c97d09dbe03fd11b83 (diff) | |
| download | glibc-b9ab448f980e296eac21ac65f53783967cc6037b.zip glibc-b9ab448f980e296eac21ac65f53783967cc6037b.tar.gz glibc-b9ab448f980e296eac21ac65f53783967cc6037b.tar.bz2 | |
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 'manual/startup.texi')
| -rw-r--r-- | manual/startup.texi | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/manual/startup.texi b/manual/startup.texi index a277714..edd1de4 100644 --- a/manual/startup.texi +++ b/manual/startup.texi @@ -625,7 +625,8 @@ basis there may be information that is not available any other way. This function is used to inquire about the entries in the auxiliary vector. The @var{type} argument should be one of the @samp{AT_} symbols defined in @file{elf.h}. If a matching entry is found, the value is -returned; if the entry is not found, zero is returned. +returned; if the entry is not found, zero is returned and @code{errno} is +set to @code{ENOENT}. @end deftypefun For some platforms, the key @code{AT_HWCAP} is the easiest way to inquire |