Rewrite iconv option parsing [BZ #19519]

This commit replaces string manipulation during `iconv_open' and iconv_prog
option parsing with a structured, flag based conversion specification.  In
doing so, it alters the internal `__gconv_open' interface and accordingly
adjusts its uses.

This change fixes several hangs in the iconv program and therefore includes
a new test to exercise iconv_prog options that originally led to these hangs.
It also includes a new regression test for option handling in the iconv
function.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/iconv/Versions b/iconv/Versions
index 60ab10a277..8a5f4cf780 100644
--- a/iconv/Versions
+++ b/iconv/Versions
@@ -6,6 +6,7 @@ libc {
   GLIBC_PRIVATE {
     # functions shared with iconv program
     __gconv_get_alias_db; __gconv_get_cache; __gconv_get_modules_db;
+    __gconv_open; __gconv_create_spec;
 
     # function used by the gconv modules
     __gconv_transliterate;