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6fb55c3b5a
(S_IXUSR, S_IXGRP, S_IXOTH, S_IROTH, S_IWOTH, S_IXOTH): Remove; now done by stat-macros.h. (NGROUPS_MAX, group_member): Remove; now down by group-member.h. No need to include <limits.h>. (errno): Remove decl; we now assume C89 or better. (access, getuid, getgid, geteuid, getegid, stat) [defined _LIBC]: New macros. (uid, gid, have_ids): Remove these static variables. They weren't accurate for programs that also invoked setreuid etc. (euidaccess) [defined EFF_ONLY_OK || defined ACC_SELF || HAVE_DECL_EACCSS]: Use builtin substitutes. [defined _LIBC]: Ignore __libc_enable_secure; it's not a correct optimization for programs run as root that later invoke setreuid. [no builtin substitutes && HAVE_DECL_SETREGID && PREFER_NONREENTRANT_EUIDACCESS]: Use setreuid+setregid to get the correct answer. [no builtin substitutes && ! (HAVE_DECL_SETREGID && PREFER_NONREENTRANT_EUIDACCESS)]: Don't assume that the stat macros have their historical values, as POSIX doesn't require this. [defined TEST]: Include <stdlib.h>; don't include errno.h twice; include <error.h> rather than "error.h".
The files in this directory are used in many GNU packages, including coreutils, diffutils, and tar. The autoconf tests required for these files are in ../m4.