/* provide consistent interface to getgroups for systems that don't allow N==0
- Copyright (C) 1996, 1999, 2003, 2006, 2007, 2008, 2009 Free
- Software Foundation, Inc.
+ Copyright (C) 1996, 1999, 2003, 2006-2013 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
/* Provide a stub that fails with ENOSYS, since there is no group
information available on mingw. */
int
-getgroups (int n _UNUSED_PARAMETER_, GETGROUPS_T *groups _UNUSED_PARAMETER_)
+getgroups (int n _GL_UNUSED, GETGROUPS_T *groups _GL_UNUSED)
{
errno = ENOSYS;
return -1;
# define GETGROUPS_ZERO_BUG 0
# endif
+/* On OS X 10.6 and later, use the usual getgroups, not the one
+ supplied when _DARWIN_C_SOURCE is defined. _DARWIN_C_SOURCE is
+ normally defined, since it means "conform to POSIX, but add
+ non-POSIX extensions even if that violates the POSIX namespace
+ rules", which is what we normally want. But with getgroups there
+ is an inconsistency, and _DARWIN_C_SOURCE means "change getgroups()
+ so that it no longer works right". The BUGS section of compat(5)
+ says that the behavior is dubious if you compile different sections
+ of a program with different _DARWIN_C_SOURCE settings, so fix only
+ the offending symbol. */
+# ifdef __APPLE__
+int posix_getgroups (int, gid_t []) __asm ("_getgroups");
+# define getgroups posix_getgroups
+# endif
+
/* On at least Ultrix 4.3 and NextStep 3.2, getgroups (0, NULL) always
fails. On other systems, it returns the number of supplemental
groups for the process. This function handles that special case
if (n != 0 || !GETGROUPS_ZERO_BUG)
{
int result;
- int saved_errno;
if (sizeof *group == sizeof *gbuf)
return getgroups (n, (GETGROUPS_T *) group);
}
saved_errno = errno;
free (gbuf);
- errno == saved_errno;
+ errno = saved_errno;
return result;
}