Attachment 1316 Details for Bug 8509 – Скрипт /etc/net/scripts/lockfile.sh

Скрипт /etc/net/scripts/lockfile.sh

lockfile.sh (text/plain), 1.07 KB, created by Yuriy Kashirin on 2005-12-27 12:29:47 MSK

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Creator: Yuriy Kashirin

Created: 2005-12-27 12:29:47 MSK

Size: 1.07 KB

patch

obsolete

>#!/bin/bash
>
># lockfile.sh [-p pid] [-t timeout] lockfile_name
>#     -p pid        calling process PID. This value will be
>#                   writen into created lockfile. Default is 0
>#     -t timeout    polling interval in seconds when checking
>#                   if file already exists. Default is 1
>#     lockfile_name name of created lock file
>
>LPID=0
>LSLEEP=1
>LFILE=
>
># options parsing
># -- all except last
>while test $# -ge 2
>do
>    LASTOPT="$1"
>    shift
>    case "$LASTOPT" in
>        -p)
>            LPID="$1"
>            shift
>            ;;
>        -t)
>            LSLEEP="$1"
>            shift
>            ;;
>    esac
>done
>
># -- last option - the name of lockfile
>test $# -ge 1 && LFILE="$1"
>
>LFTMP=".$LFILE-$$"
>
>function cleanup
>{
>    rm -f "$LFTMP"
>}
>
>trap cleanup EXIT
>
># Create read only temp file 
>rm -f "$LFTMP"
>umask 333
>echo "$LPID" > "$LFTMP" || exit 2
>
># Try to create hard link to file. This will work only
># if lock file is not exist.
>while ! link "$LFTMP" "$LFILE" 2>/dev/null
>do
>    sleep $LSLEEP
>done
>
># Lock file is created. Unlink temp file
>unlink "$LFTMP"
>exit 0
>

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