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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 17:39:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 17:39:29 +0000 |
commit | 8ffec2a3aba6f114784e11f89ef1d57a096ae540 (patch) | |
tree | ccebcbad06203e8241a8e7249f8e6c478a3682ea /lib/unlinkdir.c | |
parent | Initial commit. (diff) | |
download | coreutils-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.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/unlinkdir.c b/lib/unlinkdir.c new file mode 100644 index 0000000..e78d3bf --- /dev/null +++ b/lib/unlinkdir.c @@ -0,0 +1,55 @@ +/* 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 |