Rebase libarchive to 2.7.1

1 files changed, 141 insertions, 0 deletions

diff --git a/libarchive/libarchive-2.7.1/tar/bsdtar_cygwin.c b/libarchive/libarchive-2.7.1/tar/bsdtar_cygwin.c
new file mode 100644
index 0000000..d31f112
--- /dev/null
+++ b/libarchive/libarchive-2.7.1/tar/bsdtar_cygwin.c
@@ -0,0 +1,141 @@
+/*-
+ * Copyright (c) 2009 Michihiro NAKAJIMA
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#if defined(__CYGWIN__)
+#define _WIN32_WINNT	0x0500
+#define WINVER		0x0500
+
+#include "bsdtar_platform.h"
+#include <errno.h>
+#include <stddef.h>
+#include <sys/utime.h>
+#include <sys/stat.h>
+#include <process.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <windows.h>
+#include <sddl.h>
+
+#include "bsdtar.h"
+
+#ifndef LIST_H
+static int
+_is_privileged(HANDLE thandle, const char *sidlist[])
+{
+	TOKEN_USER *tuser;
+	TOKEN_GROUPS  *tgrp;
+	DWORD bytes;
+	PSID psid;
+	DWORD i, g;
+	int member;
+
+	psid = NULL;
+	tuser = NULL;
+	tgrp = NULL;
+	member = 0;
+	for (i = 0; sidlist[i] != NULL && member == 0; i++) {
+		if (psid != NULL)
+			LocalFree(psid);
+		/* mingw/cygwin: incorrectly prototypes arg 1 as LPSTR
+                 * instead of LPCSTR. Work around it here
+                 */
+		if (ConvertStringSidToSidA((char *)sidlist[i], &psid) == 0) {
+			errno = EPERM;
+			return (-1);
+		}
+		if (tuser == NULL) {
+			GetTokenInformation(thandle, TokenUser, NULL, 0, &bytes);
+			tuser = malloc(bytes);
+			if (tuser == NULL) {
+				errno = ENOMEM;
+				member = -1;
+				break;
+			}
+			if (GetTokenInformation(thandle, TokenUser, tuser, bytes, &bytes) == 0) {
+				errno = EPERM;
+				member = -1;
+				break;
+			}
+		}
+		member = EqualSid(tuser->User.Sid, psid);
+		if (member)
+			break;
+		if (tgrp == NULL) {
+			GetTokenInformation(thandle, TokenGroups, NULL, 0, &bytes);
+			tgrp = malloc(bytes);
+			if (tgrp == NULL) {
+				errno = ENOMEM;
+				member = -1;
+				break;
+			}
+			if (GetTokenInformation(thandle, TokenGroups, tgrp, bytes, &bytes) == 0) {
+				errno = EPERM;
+				member = -1;
+				break;
+			}
+		}
+		for (g = 0; g < tgrp->GroupCount; g++) {
+			member = EqualSid(tgrp->Groups[g].Sid, psid);
+			if (member)
+				break;
+		}
+	}
+	LocalFree(psid);
+	free(tuser);
+	free(tgrp);
+
+	return (member);
+}
+
+int
+bsdtar_is_privileged(struct bsdtar *bsdtar)
+{
+	HANDLE thandle;
+	int ret;
+	const char *sidlist[] = {
+		"S-1-5-32-544",	/* Administrators */
+		"S-1-5-32-551", /* Backup Operators */
+		NULL
+	};
+
+	(void)bsdtar;/* UNUSED */
+	if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &thandle) == 0) {
+		bsdtar_warnc(bsdtar, EPERM, "Failed to check privilege");
+		return (0);
+	}
+	ret = _is_privileged(thandle, sidlist);
+	if (ret < 0) {
+		bsdtar_warnc(bsdtar, errno, "Failed to check privilege");
+		return (0);
+	}
+	return (ret);
+}
+
+
+#endif /* LIST_H */
+
+#endif