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| author | Jeff Layton <jlayton@redhat.com> | 2010-04-01 15:28:57 -0400 |
|---|---|---|
| committer | Jeff Layton <jlayton@redhat.com> | 2010-04-01 15:28:57 -0400 |
| commit | da54228cd9e6fe144efcb2d6da87e3cbb5db5b4c (patch) | |
| tree | 637b63873a366cd5a98977cc4c75e3c05f6238e0 /aclocal/libcap.m4 | |
| parent | 810f7e4e0f2dbcbee0294d9b371071cb08268200 (diff) | |
| download | cifs-utils-da54228cd9e6fe144efcb2d6da87e3cbb5db5b4c.tar.gz cifs-utils-da54228cd9e6fe144efcb2d6da87e3cbb5db5b4c.tar.bz2 cifs-utils-da54228cd9e6fe144efcb2d6da87e3cbb5db5b4c.zip | |
mount.cifs: drop capabilities if libcap is available
Might as well be as safe as possible. Have child drop all capabilities,
and have the parent drop all but CAP_SYS_ADMIN (needed for mounting) and
CAP_DAC_OVERRIDE (needed in case mtab isn't writable by root). We might
even eventually consider being clever and dropping CAP_DAC_OVERRIDE when
root has access to the mtab.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Diffstat (limited to 'aclocal/libcap.m4')
| -rw-r--r-- | aclocal/libcap.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/aclocal/libcap.m4 b/aclocal/libcap.m4 new file mode 100644 index 0000000..0b42689 --- /dev/null +++ b/aclocal/libcap.m4 @@ -0,0 +1,20 @@ +dnl Checks for libcap.so +dnl +AC_DEFUN([AC_LIBCAP], [ + + dnl look for prctl + AC_CHECK_FUNC([prctl], , ) + + dnl look for the library; do not add to LIBS if found + AC_CHECK_LIB([cap], [cap_get_proc], enable_libcap="yes", enable_libcap="no", ) + + AC_CHECK_HEADERS([sys/capability.h], , + [AC_MSG_WARN([libcap headers not found. mount.cifs will be built without support for dropping capabilities. Consider installing libcap-devel.]) ; enable_libcap="no"]) + + if test "$enable_libcap" = "yes"; then + AC_DEFINE([HAVE_LIBCAP],[1], [Define if libcap exists]) + LIBCAP=-lcap + AC_SUBST(LIBCAP) + fi + +])dnl |