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authorP. J. McDermott <pjm@nac.net>2013-07-23 20:11:06 (EDT)
committer P. J. McDermott <pjm@nac.net>2013-07-23 20:11:06 (EDT)
commitd7c8dd6d04fa883b3793f93874bc2fd3d0b6783c (patch)
tree413b04ff2cdc36ce6c14ef72a042a49e5d0d1849 /lib
parente312f0402d96d2558889aac487740f8e8c2b5e1b (diff)
lib/dir.sh: New file.
Diffstat (limited to 'lib')
-rw-r--r--lib/dir.sh69
1 files changed, 69 insertions, 0 deletions
diff --git a/lib/dir.sh b/lib/dir.sh
new file mode 100644
index 0000000..32c92fd
--- /dev/null
+++ b/lib/dir.sh
@@ -0,0 +1,69 @@
+# pro-archman
+# lib/dir.sh
+# Miscellaneous directory-related functions
+#
+# Copyright (C) 2013 Patrick "P. J." McDermott
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+hash_name()
+{
+ local name="${1}"
+ local hash=
+
+ if [ "x${name}" != "x${name#lib?}" ]; then
+ hash="$(printf '%s\n' "${name}" | sed 's/^\(lib.\).*$/\1/')"
+ else
+ hash="$(printf '%s\n' "${name}" | sed 's/^\(.\).*$/\1/')"
+ fi
+ printf '%s\n' "${hash}"
+
+ return 0
+}
+
+dir_is_empty()
+{
+ local dir="${1}"
+ local ret=
+ local dirent=
+
+ ret=0
+
+ # Patterns to match all dirents except "." and "..":
+ # * dirents whose names don't start with "."
+ # .[!.] dirents whose names start with ".", are two characters long,
+ # and aren't ".."
+ # .??* dirents whose names start with "." and are three or more
+ # characters long
+ for dirent in "${dir}/"* "${dir}/".[!.] "${dir}/".[!.] "${dir}/".??*; do
+ if [ -e "${dirent}" ]; then
+ ret=1
+ break
+ fi
+ done
+
+ return ${ret}
+}
+
+try_rmdir()
+{
+ local dir="${1}"
+
+ if dir_is_empty "${dir}"; then
+ rmdir "${dir}"
+ return ${?}
+ else
+ return 1
+ fi
+}