- # Create intermediate dirs using mode 755 as modified by the umask.
- # This is like FreeBSD 'install' as of 1997-10-28.
- umask=`umask`
- case $stripcmd.$umask in
- # Optimize common cases.
- *[2367][2367]) mkdir_umask=$umask;;
- .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
-
- *[0-7])
- mkdir_umask=`expr $umask + 22 \
- - $umask % 100 % 40 + $umask % 20 \
- - $umask % 10 % 4 + $umask % 2
- `;;
- *) mkdir_umask=$umask,go-w;;
- esac
-
- # With -d, create the new directory with the user-specified mode.
- # Otherwise, rely on $mkdir_umask.
- if test -n "$dir_arg"; then
- mkdir_mode=-m$mode
+ # With -d, create the new directory with the user-specified mode.
+ # Otherwise, rely on $mkdir_umask.
+ if test -n "$dir_arg"; then
+ mkdir_mode=-m$mode
+ else
+ mkdir_mode=
+ fi
+
+ posix_mkdir=false
+ # The $RANDOM variable is not portable (e.g., dash). Use it
+ # here however when possible just to lower collision chance.
+ tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+
+ trap '
+ ret=$?
+ rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
+ exit $ret
+ ' 0
+
+ # Because "mkdir -p" follows existing symlinks and we likely work
+ # directly in world-writeable /tmp, make sure that the '$tmpdir'
+ # directory is successfully created first before we actually test
+ # 'mkdir -p'.
+ if (umask $mkdir_umask &&
+ $mkdirprog $mkdir_mode "$tmpdir" &&
+ exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
+ then
+ if test -z "$dir_arg" || {
+ # Check for POSIX incompatibilities with -m.
+ # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+ # other-writable bit of parent directory when it shouldn't.
+ # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+ test_tmpdir="$tmpdir/a"
+ ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
+ case $ls_ld_tmpdir in
+ d????-?r-*) different_mode=700;;
+ d????-?--*) different_mode=755;;
+ *) false;;
+ esac &&
+ $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
+ ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
+ test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+ }
+ }
+ then posix_mkdir=:
+ fi
+ rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"