RepoMirrors/musl
1
0
Fork 0
mirror of git://git.musl-libc.org/musl synced 2025-01-10 16:49:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

restore h_errno ABI compatibility with ancient binaries

Browse Source 
prior to commit e68c51ac46, h_errno was
actually an external data object not a macro. bring back the symbol,
and use it as the storage for the main thread's h_errno.

technically this still doesn't provide full compatibility if the
application was multithreaded, but at the time there were no res_*
functions (and they did not set h_errno anyway), so any use of h_errno
would have been via thread-unsafe functions. thus a solution that just
fixes single-threaded applications seems acceptable.
This commit is contained in:
Rich Felker 2020-08-30 21:30:37 -04:00
parent cab0a8fb8d
commit cf27184d00
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/network/h_errno.c
View File

@ -1,7 +1,11 @@
#include <netdb.h>
#include "pthread_impl.h"
#undef h_errno
int h_errno;
int *__h_errno_location(void)
{
if (!__pthread_self()->stack) return &h_errno;
return &__pthread_self()->h_errno_val;
}