需要一些帮助来了解问题所在。简而言之:我编写了一个 bourne shell 脚本,它在目标目录中创建指向源目录内容的链接。它在主机系统上运行良好,但是当针对挂载 fs 上的目录(来自 chroot 和本机系统)时,它不起作用并且根本不提供任何输出。
详细信息:挂载 fs: ext3, rw
主机系统:3.2.0-48-generic #74-Ubuntu SMP GNU/Linux
为了缩小问题的范围,以“/usr”为例。
主机系统中“/usr”的权限:drwxr-xr-x
挂载分区上“/usr”的权限:drwxr-xr-x
尝试从主机系统同时使用 bash 和 dash。相同的结果 - 适用于本机文件系统,不适用于已安装的文件系统。
脚本(cord.sh;在我的情况下从根运行):
# !/bin/sh
SRCFOLDER=$2 # folder with package installation
DESTFOLDER=$3 # destination folder to install symlinks to ('/' - for base sys; '/usr' - userland)
TARGETS=$(ls $SRCFOLDER) # targets to handle
SRCFOLDER=${SRCFOLDER%/} # stripping slashes from the end, if they are present
DESTFOLDER=${DESTFOLDER%/} #
##
## LINKING
##
if [ "$1" = "-c" ];
then printf %s "$TARGETS" | while IFS= read -r line
do
current_target=$(file $SRCFOLDER/$line) # had an issue with different output in different systems
if [ "${current_target% }" = "$SRCFOLDER/$line: directory" ]; # stripping space helped
then
mkdir -v $DESTFOLDER/$line # if other package created it - it'll fail
/usr/local/bin/cord.sh -c $SRCFOLDER/$line $DESTFOLDER/$line # RECURSION
else
ln -sv $SRCFOLDER/$line $DESTFOLDER/$line # will fail, if exists
fi;
done
##
## REMOVING LINKS
##
elif [ "$1" = "-d" ];
then printf %s "$TARGETS" | while IFS= read -r line
do
current_target=$(file $SRCFOLDER/$line)
if [ "${current_target% }" = "$SRCFOLDER/$line: directory" ];
then
/usr/local/bin/cord.sh -d $SRCFOLDER/$line $DESTFOLDER/$line # RECURSION
else
rm -v $DESTFOLDER/$line
fi;
done
elif [ "$1" = "-h" ];
then
echo "Usage:"
echo "cord -c /path/to/pkgdir /path/to/linkdir - create simlinks for package contents"
echo "cord -d /path/to/pkgdir /path/to/linkdir - delete links for package"
echo "cord -h - displays this help note"
else
echo "Usage:"
echo "cord -c /path/to/pkgdir /path/to/linkdir - create simlinks for package contents"
echo "cord -d /path/to/pkgdir /path/to/linkdir - delete links for package"
echo "cord -h - displays this help note"
fi;
最明显的建议是权限问题。然而一切看起来都很正常。也许我错过了什么?