Merge remote-tracking branch 'origin/master' into 5.9

* Test/D02glob.ztst:
  On the "unreadable directories can be globbed (users/24619, users/24626)"
  test, resolve conflicts by removing the Cygwin-only skip that has been added
  in master, since the test is passing on this branch.  This effectively reverts
  workers/45492.  See discussion starting in workers/45504.

* origin/master:
  unposted: Remove 'sgi', as that OpenBSD port has been discontinued.
  45509: fix typos in B01cd.ztst
  45490 (+45495 and a test): refactor rlimits.c
  github #49: Fix typo: longson should be loongson
  users/24710: Fix job control problem with sudo.
  45492: skip test added by users/24633 on Cygwin
  45488: COMP_WORDS for bash need "$@"-style quoting
  45487: Missing mod_export declarations for AIX
  45447: Complete vcs_info_hookadd and vcs_info_hookdel. Expose _vcs_info_hooks as a top-level helper function.
  45463: test: kill: Document why we use SIGURG
  45453: builtins: kill: Do not signal current process group when pid is empty
  45452: builtins: kill: Add `kill ''` regression test with explicit sigspec
  45451: builtins: kill: Add basic test suite
  github #48/0002: vcs_info git: properly detect bare repositories
  github #48/0001: vcs_info git: avoid warnings in bare repositories
  unposted: Post-release version bump
  unposted: Release 5.8
  CVE-2019-20044: Update change log for preceding commits
  Update NEWS/README
  Add unsetopt/PRIVILEGED tests
  Clean up error-message white space
  Improve PRIVILEGED fixes (again)
  Improve PRIVILEGED fixes
  Drop privileges securely
  unposted: V01zmodload: Fix failing test from workers/45385
  45423: _su: Improve arg handling, shell look-ups
  unposted: _zip: Recognise '--'
  45385: Add a test for 'zmodload -Fa' preemptively disabling ("blacklisting"?) features.
  unposted: Test release: 5.7.1-test-3
  zsh/system: Fix infinite loop in sysread
  _diff_options: Restore -w completion lost in workers/43351
  unposted: Fix ChangeLog typo.
  45368: Add tests for workers/45367's issue about double slashes in 'cd -P' and /home/daniel/in/zsh.
  45373: Fix ERR_EXIT bug in else branch of if.
  45372: Record a symlink loop bug involving :P
  45365: _git: Fix __git_recent_branches for the case when a commit has an empty message
  45343: Queue signals around arithmetic evaluations
  45344: Document where third-party completion functions should be installed.
  45345: internal: ztst.vim: Fix highlighting of zsh comments in test payload
  unposted: internal: Add some comments and fix indentation.  No functional change.
  45340: internal: Document the difference between paramtab and realparamtab.
  45332: _git: add completion for git-version
  _brace_parameter: add missing \

Conflicts:
	ChangeLog
	Test/D02glob.ztst
	Test/V01zmodload.ztst

1 files changed, 129 insertions, 0 deletions

diff --git a/Src/openssh_bsd_setres_id.c b/Src/openssh_bsd_setres_id.c
new file mode 100644
index 000000000..65e91a40c
--- /dev/null
+++ b/Src/openssh_bsd_setres_id.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2012 Darren Tucker (dtucker at zip com au).
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/*
+ * openssh_bsd_setres_id.c - setresuid() and setresgid() wrappers
+ *
+ * This file is part of zsh, the Z shell.
+ *
+ * It is based on the file openbsd-compat/bsd-setres_id.c in OpenSSH 7.9p1,
+ * which is subject to the copyright notice above.  The zsh modifications are
+ * licensed as follows:
+ *
+ * Copyright (c) 2019 Daniel Shahaf
+ * All rights reserved.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and to distribute modified versions of this software for any
+ * purpose, provided that the above copyright notice and the following
+ * two paragraphs appear in all copies of this software.
+ *
+ * In no event shall Daniel Shahaf or the Zsh Development Group be liable
+ * to any party for direct, indirect, special, incidental, or consequential
+ * damages arising out of the use of this software and its documentation,
+ * even if Daniel Shahaf and the Zsh Development Group have been advised of
+ * the possibility of such damage.
+ *
+ * Daniel Shahaf and the Zsh Development Group specifically disclaim any
+ * warranties, including, but not limited to, the implied warranties of
+ * merchantability and fitness for a particular purpose.  The software
+ * provided hereunder is on an "as is" basis, and Daniel Shahaf and the
+ * Zsh Development Group have no obligation to provide maintenance,
+ * support, updates, enhancements, or modifications.
+ *
+ */
+
+
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "zsh.mdh"
+
+#if defined(ZSH_IMPLEMENT_SETRESGID) || defined(BROKEN_SETRESGID)
+int
+setresgid(gid_t rgid, gid_t egid, gid_t sgid)
+{
+	int ret = 0, saved_errno;
+
+	if (rgid != sgid) {
+		errno = ENOSYS;
+		return -1;
+	}
+#if defined(ZSH_HAVE_NATIVE_SETREGID) && !defined(BROKEN_SETREGID)
+	if (setregid(rgid, egid) < 0) {
+		saved_errno = errno;
+		zwarnnam("setregid", "to gid %L: %e", (long)rgid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+#else
+	if (setegid(egid) < 0) {
+		saved_errno = errno;
+		zwarnnam("setegid", "to gid %L: %e", (long)(unsigned int)egid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+	if (setgid(rgid) < 0) {
+		saved_errno = errno;
+		zwarnnam("setgid", "to gid %L: %e", (long)rgid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+#endif
+	return ret;
+}
+#endif
+
+#if defined(ZSH_IMPLEMENT_SETRESUID) || defined(BROKEN_SETRESUID)
+int
+setresuid(uid_t ruid, uid_t euid, uid_t suid)
+{
+	int ret = 0, saved_errno;
+
+	if (ruid != suid) {
+		errno = ENOSYS;
+		return -1;
+	}
+#if defined(ZSH_HAVE_NATIVE_SETREUID) && !defined(BROKEN_SETREUID)
+	if (setreuid(ruid, euid) < 0) {
+		saved_errno = errno;
+		zwarnnam("setreuid", "to uid %L: %e", (long)ruid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+#else
+
+# ifndef SETEUID_BREAKS_SETUID
+	if (seteuid(euid) < 0) {
+		saved_errno = errno;
+		zwarnnam("seteuid", "to uid %L: %e", (long)euid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+# endif
+	if (setuid(ruid) < 0) {
+		saved_errno = errno;
+		zwarnnam("setuid", "to uid %L: %e", (long)ruid, errno);
+		errno = saved_errno;
+		ret = -1;
+	}
+#endif
+	return ret;
+}
+#endif