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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 17:39:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 17:39:29 +0000
commit8ffec2a3aba6f114784e11f89ef1d57a096ae540 (patch)
treeccebcbad06203e8241a8e7249f8e6c478a3682ea /lib/unlinkdir.c
parentInitial commit. (diff)
downloadcoreutils-8ffec2a3aba6f114784e11f89ef1d57a096ae540.tar.xz
coreutils-8ffec2a3aba6f114784e11f89ef1d57a096ae540.zip
Adding upstream version 8.32.upstream/8.32upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/unlinkdir.c')
-rw-r--r--lib/unlinkdir.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/unlinkdir.c b/lib/unlinkdir.c
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+/* unlinkdir.c - determine whether we can unlink directories
+
+ Copyright (C) 2005-2006, 2009-2020 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
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert, Jim Meyering, and David Bartley. */
+
+#include <config.h>
+
+#include "unlinkdir.h"
+#include "priv-set.h"
+#include "root-uid.h"
+#include <unistd.h>
+
+#if ! UNLINK_CANNOT_UNLINK_DIR
+
+/* Return true if we cannot unlink directories, false if we might be
+ able to unlink directories. */
+
+bool
+cannot_unlink_dir (void)
+{
+ static bool initialized;
+ static bool cannot;
+
+ if (! initialized)
+ {
+# if defined PRIV_SYS_LINKDIR
+ /* We might be able to unlink directories if we cannot
+ determine our privileges, or if we have the
+ PRIV_SYS_LINKDIR privilege. */
+ cannot = (priv_set_ismember (PRIV_SYS_LINKDIR) == 0);
+# else
+ /* In traditional Unix, only root can unlink directories. */
+ cannot = (geteuid () != ROOT_UID);
+# endif
+ initialized = true;
+ }
+
+ return cannot;
+}
+
+#endif