Am 12.11.2010 10:21, schrieb Amadeusz ÅoÅnowski:
New:
str_starts, str_replace
funiq - print new unique file name
mkuniqdir - create and print new unique dir
splitsep - splits given string 'str' with separator 'sep' into vars
udevmatch - create udev rule match for a device
Modified:
foreach_uuid_until - use $___ as a place holder
---
modules.d/99base/dracut-lib.sh | 137 +++++++++++++++++++++++++++++++++++++--
1 files changed, 130 insertions(+), 7 deletions(-)
diff --git a/modules.d/99base/dracut-lib.sh b/modules.d/99base/dracut-lib.sh
index 596dae2..f0c030b 100755
--- a/modules.d/99base/dracut-lib.sh
+++ b/modules.d/99base/dracut-lib.sh
@@ -6,6 +6,29 @@ strstr() {
[ "${1#*$2*}" != "$1" ]
}
+# returns OK if $1 contains $2 at the beginning
+str_starts() {
+ [ "${1#$2*}" != "$1" ]
+}
+
+# replaces all occurrences of 'search' in 'str' with 'replacement'
+#
+# str_replace str search replacement
+#
+# example:
+# str_replace ' one two three ' ' ' '_'
+str_replace() {
+ local in="$1"; local s="$2"; local r="$3"
+ local out=''
+
+ while strstr "${in}" "$s"; do
+ chop="${in%%$s*}"
+ out="${out}${chop# }$r"
+ in="${in#*$s}"
+ done
+ echo "${out}${in}"
+}
+
_getcmdline() {
local _line
unset _line
@@ -142,6 +165,34 @@ getoptcomma() {
return 1
}
+# Splits given string 'str' with separator 'sep' into variables 'var1', 'var2',
+# 'varN'. If number of fields is less than number of variables, remaining are
+# not set. If number of fields is greater than number of variables, the last
+# variable takes remaining fields. In short - it acts similary to 'read'.
+#
+# splitsep sep str var1 var2 varN
+#
+# example:
+# splitsep ':' 'foo:bar:baz' v1 v2
+# in result:
+# v1='foo', v2='bar:baz'
+#
+# TODO: ':' inside fields.
+splitsep() {
+ local sep="$1"; local str="$2"; shift 2
+ local tmp
+
+ while [ -n "$str" -a -n "$*" ]; do
+ tmp="${str%%:*}"
+ eval "$1=${tmp}"
+ str="${str#$tmp}"
+ str="${str#:}"
+ shift
+ done
+
+ return 0
+}
+
setdebug() {
if [ -z "$RDDEBUG" ]; then
if [ -e /proc/cmdline ]; then
@@ -337,32 +388,104 @@ ip_to_var() {
esac
}
-# Evaluate command for UUIDs either given as arguments for this function or all
+# Create udev rule match for a device with its device name, or the udev property
+# ID_FS_UUID or ID_FS_LABEL
+#
+# example:
+# udevmatch LABEL=boot
+# prints:
+# ENV{ID_FS_LABEL}="boot"
+#
+# TOOD: symlinks
+udevmatch() {
+ case "$1" in
+ UUID=????????-????-????-????-????????????|LABEL=*)
+ printf 'ENV{ID_FS_%s}=="%s"' "${1%%=*}" "${1#*=}"
+ ;;
+ UUID=*)
+ printf 'ENV{ID_FS_UUID}=="%s*"' "${1#*=}"
+ ;;
+ /dev/?*) printf 'KERNEL=="%s"' "${1#/dev/}" ;;
+ *) return 255 ;;
+ esac
+}
+
+# Prints unique path for potential file inside specified directory. It consists
+# of specified directory, prefix and number at the end which is incremented
+# until non-existing file is found.
+#
+# funiq dir prefix
+#
+# example:
+# # ls /mnt
+# cdrom0 cdrom1
+#
+# # funiq /mnt cdrom
+# /mnt/cdrom2
+funiq() {
+ local dir="$1"; local prefix="$2"
+ local i=0
+
+ [ -d "${dir}" ] || return 1
+
+ while [ -e "${dir}/${prefix}$i" ]; do
+ i=$(($i+1)) || return 1
+ done
+
+ echo "${dir}/${prefix}$i"
+}
+
+# Creates unique directory and prints its path. It's using funiq to generate
+# path.
+#
+# mkuniqdir subdir new_dir_name
+mkuniqdir() {
+ local dir="$1"; local prefix="$2"
+ local retdir; local retdir_new
+
+ [ -d "${dir}" ] || mkdir -p "${dir}" || return 1
+
+ retdir=$(funiq "${dir}" "${prefix}") || return 1
+ until mkdir "${retdir}" 2>/dev/null; do
+ retdir_new=$(funiq "${dir}" "${prefix}") || return 1
+ [ "$retdir_new" = "$retdir" ]&& return 1
+ retdir="$retdir_new"
+ done
+
+ echo "${retdir}"
+}
+
+# Evaluates command for UUIDs either given as arguments for this function or all
# listed in /dev/disk/by-uuid. UUIDs doesn't have to be fully specified. If
-# beginning is given it is expanded to all matching UUIDs. To pass full UUID
-# to your command use '${full_uuid}'. Remember to escape '$'!
+# beginning is given it is expanded to all matching UUIDs. To pass full UUID to
+# your command use '$___' as a place holder. Remember to escape '$'!
+#
+# foreach_uuid_until [ -p prefix ] command UUIDs
#
-# $1 = command to be evaluated
-# $2 = list of UUIDs separated by space
+# prefix - string to put just before $___
+# command - command to be evaluated
+# UUIDs - list of UUIDs separated by space
#
# The function returns after *first successful evaluation* of the given command
# with status 0. If evaluation fails for every UUID function returns with
# status 1.
#
# Example:
-# foreach_uuid_until "mount -U \${full_uuid} /mnt; echo OK; umount /mnt" \
+# foreach_uuid_until "mount -U \$___ /mnt; echo OK; umount /mnt" \
# "01234 f512 a235567f-12a3-c123-a1b1-01234567abcb"
foreach_uuid_until() (
cd /dev/disk/by-uuid
+ [ "$1" = -p ]&& local prefix="$2"&& shift 2
local cmd="$1"; shift; local uuids_list="$*"
- local uuid; local full_uuid
+ local uuid; local full_uuid; local ___
[ -n "${cmd}" ] || return 1
for uuid in ${uuids_list:-*}; do
for full_uuid in ${uuid}*; do
[ -e "${full_uuid}" ] || continue
+ ___="${prefix}${full_uuid}"
eval ${cmd}&& return 0
done
done
pushed all three
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