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samba/samba.sh

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#!/usr/bin/env bash
#===============================================================================
# FILE: samba.sh
#
# USAGE: ./samba.sh
#
# DESCRIPTION: Entrypoint for samba docker container
#
# OPTIONS: ---
# REQUIREMENTS: ---
# BUGS: ---
# NOTES: ---
# AUTHOR: Struchkov Mark (mark@struchkov.dev),
# ORGANIZATION:
# CREATED: 09/28/2014 12:11
# REVISION: 1.0
#===============================================================================
set -o nounset # Treat unset variables as an error
### charmap: setup character mapping for file/directory names
# Arguments:
# chars) from:to character mappings separated by ','
# Return: configured character mapings
charmap() { local chars="$1" file=/etc/samba/smb.conf
grep -q catia $file || sed -i '/TCP_NODELAY/a \
\
vfs objects = catia\
catia:mappings =\
' $file
sed -i '/catia:mappings/s| =.*| = '"$chars"'|' $file
}
### generic: set a generic config option in a section
# Arguments:
# section) section of config file
# option) raw option
# Return: line added to smb.conf (replaces existing line with same key)
generic() { local section="$1" key="$(sed 's| *=.*||' <<< $2)" \
value="$(sed 's|[^=]*= *||' <<< $2)" file=/etc/samba/smb.conf
if sed -n '/^\['"$section"'\]/,/^\[/p' $file | grep -qE '^;*\s*'"$key"; then
sed -i '/^\['"$1"'\]/,/^\[/s|^;*\s*\('"$key"' = \).*| \1'"$value"'|' \
"$file"
else
sed -i '/\['"$section"'\]/a \ '"$key = $value" "$file"
fi
}
### global: set a global config option
# Arguments:
# option) raw option
# Return: line added to smb.conf (replaces existing line with same key)
global() { local key="$(sed 's| *=.*||' <<< $1)" \
value="$(sed 's|[^=]*= *||' <<< $1)" file=/etc/samba/smb.conf
if sed -n '/^\[global\]/,/^\[/p' $file | grep -qE '^;*\s*'"$key"; then
sed -i '/^\[global\]/,/^\[/s|^;*\s*\('"$key"' = \).*| \1'"$value"'|' \
"$file"
else
sed -i '/\[global\]/a \ '"$key = $value" "$file"
fi
}
### include: add a samba config file include
# Arguments:
# file) file to import
include() { local includefile="$1" file=/etc/samba/smb.conf
sed -i "\\|include = $includefile|d" "$file"
echo "include = $includefile" >> "$file"
}
### import: import a smbpasswd file
# Arguments:
# file) file to import
# Return: user(s) added to container
import() { local file="$1" name id
while read name id; do
grep -q "^$name:" /etc/passwd || adduser -D -H -u "$id" "$name"
done < <(cut -d: -f1,2 $file | sed 's/:/ /')
pdbedit -i smbpasswd:$file
}
### perms: fix ownership and permissions of share paths
# Arguments:
# none)
# Return: result
perms() { local i file=/etc/samba/smb.conf
for i in $(awk -F ' = ' '/ path = / {print $2}' $file); do
chown -Rh smbuser. $i
find $i -type d ! -perm 775 -exec chmod 775 {} \;
find $i -type f ! -perm 0664 -exec chmod 0664 {} \;
done
}
export -f perms
### recycle: disable recycle bin
# Arguments:
# none)
# Return: result
recycle() { local file=/etc/samba/smb.conf
sed -i '/recycle:/d; /vfs objects/s/ recycle / /' $file
}
### share: Add share
# Arguments:
# share) share name
# path) path to share
# browsable) 'yes' or 'no'
# readonly) 'yes' or 'no'
# guest) 'yes' or 'no'
# users) list of allowed users
# admins) list of admin users
# writelist) list of users that can write to a RO share
# comment) description of share
# Return: result
share() { local share="$1" path="$2" browsable="${3:-yes}" ro="${4:-yes}" \
guest="${5:-yes}" users="${6:-""}" admins="${7:-""}" \
writelist="${8:-""}" comment="${9:-""}" file=/etc/samba/smb.conf
sed -i "/\\[$share\\]/,/^\$/d" $file
echo "[$share]" >>$file
echo " path = $path" >>$file
echo " browsable = $browsable" >>$file
echo " read only = $ro" >>$file
echo " guest ok = $guest" >>$file
[[ ${VETO:-yes} == no ]] || {
echo -n " veto files = /.apdisk/.DS_Store/.TemporaryItems/" >>$file
echo -n ".Trashes/desktop.ini/ehthumbs.db/Network Trash Folder/" >>$file
echo "Temporary Items/Thumbs.db/" >>$file
echo " delete veto files = yes" >>$file
}
[[ ${users:-""} && ! ${users:-""} == all ]] &&
echo " valid users = $(tr ',' ' ' <<< $users)" >>$file
[[ ${admins:-""} && ! ${admins:-""} =~ none ]] &&
echo " admin users = $(tr ',' ' ' <<< $admins)" >>$file
[[ ${writelist:-""} && ! ${writelist:-""} =~ none ]] &&
echo " write list = $(tr ',' ' ' <<< $writelist)" >>$file
[[ ${comment:-""} && ! ${comment:-""} =~ none ]] &&
echo " comment = $(tr ',' ' ' <<< $comment)" >>$file
echo "" >>$file
[[ -d $path ]] || mkdir -p $path
}
### smb: disable SMB2 minimum
# Arguments:
# none)
# Return: result
smb() { local file=/etc/samba/smb.conf
sed -i 's/\([^#]*min protocol *=\).*/\1 LANMAN1/' $file
}
### user: add a user
# Arguments:
# name) for user
# password) for user
# id) for user
# group) for user
# gid) for group
# Return: user added to container
user() { local name="$1" passwd="$2" id="${3:-""}" group="${4:-""}" \
gid="${5:-""}"
[[ "$group" ]] && { grep -q "^$group:" /etc/group ||
addgroup ${gid:+--gid $gid }"$group"; }
grep -q "^$name:" /etc/passwd ||
adduser -D -H ${group:+-G $group} ${id:+-u $id} "$name"
echo -e "$passwd\n$passwd" | smbpasswd -s -a "$name"
}
### workgroup: set the workgroup
# Arguments:
# workgroup) the name to set
# Return: configure the correct workgroup
workgroup() { local workgroup="$1" file=/etc/samba/smb.conf
sed -i 's|^\( *workgroup = \).*|\1'"$workgroup"'|' $file
}
### widelinks: allow access wide symbolic links
# Arguments:
# none)
# Return: result
widelinks() { local file=/etc/samba/smb.conf \
replace='\1\n wide links = yes\n unix extensions = no'
sed -i 's/\(follow symlinks = yes\)/'"$replace"'/' $file
}
### usage: Help
# Arguments:
# none)
# Return: Help text
usage() { local RC="${1:-0}"
echo "Usage: ${0##*/} [-opt] [command]
Options (fields in '[]' are optional, '<>' are required):
-h This help
-c \"<from:to>\" setup character mapping for file/directory names
required arg: \"<from:to>\" character mappings separated by ','
-G \"<section;parameter>\" Provide generic section option for smb.conf
required arg: \"<section>\" - IE: \"share\"
required arg: \"<parameter>\" - IE: \"log level = 2\"
-g \"<parameter>\" Provide global option for smb.conf
required arg: \"<parameter>\" - IE: \"log level = 2\"
-i \"<path>\" Import smbpassword
required arg: \"<path>\" - full file path in container
-n Start the 'nmbd' daemon to advertise the shares
-p Set ownership and permissions on the shares
-r Disable recycle bin for shares
-S Disable SMB2 minimum version
-s \"<name;/path>[;browse;readonly;guest;users;admins;writelist;comment]\"
Configure a share
required arg: \"<name>;</path>\"
<name> is how it's called for clients
<path> path to share
NOTE: for the default value, just leave blank
[browsable] default:'yes' or 'no'
[readonly] default:'yes' or 'no'
[guest] allowed default:'yes' or 'no'
NOTE: for user lists below, usernames are separated by ','
[users] allowed default:'all' or list of allowed users
[admins] allowed default:'none' or list of admin users
[writelist] list of users that can write to a RO share
[comment] description of share
-u \"<username;password>[;ID;group;GID]\" Add a user
required arg: \"<username>;<passwd>\"
<username> for user
<password> for user
[ID] for user
[group] for user
[GID] for group
-w \"<workgroup>\" Configure the workgroup (domain) samba should use
required arg: \"<workgroup>\"
<workgroup> for samba
-W Allow access wide symbolic links
-I Add an include option at the end of the smb.conf
required arg: \"<include file path>\"
<include file path> in the container, e.g. a bind mount
The 'command' (if provided and valid) will be run instead of samba
" >&2
exit $RC
}
[[ "${USERID:-""}" =~ ^[0-9]+$ ]] && usermod -u $USERID -o smbuser
[[ "${GROUPID:-""}" =~ ^[0-9]+$ ]] && groupmod -g $GROUPID -o smb
while getopts ":hc:G:g:i:nprs:Su:Ww:I:" opt; do
case "$opt" in
h) usage ;;
c) charmap "$OPTARG" ;;
G) eval generic $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $OPTARG) ;;
g) global "$OPTARG" ;;
i) import "$OPTARG" ;;
n) NMBD="true" ;;
p) PERMISSIONS="true" ;;
r) recycle ;;
s) eval share $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $OPTARG) ;;
S) smb ;;
u) eval user $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $OPTARG) ;;
w) workgroup "$OPTARG" ;;
W) widelinks ;;
I) include "$OPTARG" ;;
"?") echo "Unknown option: -$OPTARG"; usage 1 ;;
":") echo "No argument value for option: -$OPTARG"; usage 2 ;;
esac
done
shift $(( OPTIND - 1 ))
[[ "${CHARMAP:-""}" ]] && charmap "$CHARMAP"
while read i; do
eval generic $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $i)
done < <(env | awk '/^GENERIC[0-9=_]/ {sub (/^[^=]*=/, "", $0); print}')
while read i; do
global "$i"
done < <(env | awk '/^GLOBAL[0-9=_]/ {sub (/^[^=]*=/, "", $0); print}')
[[ "${IMPORT:-""}" ]] && import "$IMPORT"
[[ "${RECYCLE:-""}" ]] && recycle
while read i; do
eval share $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $i)
done < <(env | awk '/^SHARE[0-9=_]/ {sub (/^[^=]*=/, "", $0); print}')
[[ "${SMB:-""}" ]] && smb
while read i; do
eval user $(sed 's/^/"/; s/$/"/; s/;/" "/g' <<< $i)
done < <(env | awk '/^USER[0-9=_]/ {sub (/^[^=]*=/, "", $0); print}')
[[ "${WORKGROUP:-""}" ]] && workgroup "$WORKGROUP"
[[ "${WIDELINKS:-""}" ]] && widelinks
[[ "${INCLUDE:-""}" ]] && include "$INCLUDE"
[[ "${PERMISSIONS:-""}" ]] && perms &
if [[ $# -ge 1 && -x $(which $1 2>&-) ]]; then
exec "$@"
elif [[ $# -ge 1 ]]; then
echo "ERROR: command not found: $1"
exit 13
elif ps -ef | egrep -v grep | grep -q smbd; then
echo "Service already running, please restart container to apply changes"
else
[[ ${NMBD:-""} ]] && ionice -c 3 nmbd -D
exec ionice -c 3 smbd -F --debug-stdout --no-process-group </dev/null
fi
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