diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/common.sh | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/common.sh b/lib/common.sh index b39bbbc..932799e 100644 --- a/lib/common.sh +++ b/lib/common.sh @@ -104,6 +104,57 @@ in_array() { } ## +# usage : lock_open_write( $fd, $path, $wait_message ) +## +lock_open_write() { + local fd=$1 + local path=$2 + local msg=$3 + + # Only reopen the FD if it wasn't handed to us + if [[ $(readlink -f /dev/fd/$fd) != "${path}.lock" ]]; then + mkdir -p "${path%/*}" + eval "exec $fd>${path}.lock" + fi + + if ! flock -n $fd; then + stat_busy "$msg" + flock $fd + stat_done + fi +} + +## +# usage : lock_open_read( $fd, $path, $wait_message ) +## +lock_open_read() { + local fd=$1 + local path=$2 + local msg=$3 + + # Only reopen the FD if it wasn't handed to us + if [[ $(readlink -f /dev/fd/$fd) != "${path}.lock" ]]; then + mkdir -p "${path%/*}" + eval "exec $fd>${path}.lock" + fi + + if ! flock -sn $fd; then + stat_busy "$msg" + flock -s $fd + stat_done + fi +} + + +## +# usage : lock_close( $fd ) +## +lock_close() { + local fd=$1 + eval "exec $fd>&-" +} + +## # usage : get_full_version( [$pkgname] ) # return : full version spec, including epoch (if necessary), pkgver, pkgrel ## |