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Linux中暫時沒發現現成的命令，因此可用用shell腳本結合df -h命令來實現
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實現思路：
1、輸入一個路徑
2、獲得df -h信息
3、保存根目錄的可用空間大小
4、除了跟根目錄之外的其他掛載目錄匹配路徑，如果匹配成功，取該路徑的可用空間，或者取根目錄的可用空間
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shell腳本：
#!/bin/bash
#########################################
#author:
# ? ?yxj
# BLOG:
# ? ?http://blog.csdn.net/u010317005
#usage:
# ?./get_dir_avail_space [dir]
#e.g:
# ? ./get_dir_avail_space /root
# ? ./get_dir_avail_space?
#########################################
############get test path###############
if [ -z $1 ];then
?read -p "input the path(e.g: /root):" path
else
?path=$1
fi
if [ "${path:0:1}" = "/" ];then?
? if [ ! -d ${path} ];then
? ?# echo "create new path:${path}"
? ? mkdir -p ${path}
? fi
?# echo "absolute directory:${path}"
else
? pwd=`pwd`
? if [ ! -d "${pwd}/${path}" ];then
? # echo "create new path:${pwd}/${path}"
? ?mkdir -p ${pwd}/${path}
? fi
? path=${pwd}/${path}
?# echo "path:${path}"
fi
##########get data from df -h#############
df -h | while read line
do?
? #for var in $line
? line_path=`echo ${line} | awk -F' ' '{print $6}'`
? line_avail=`echo ${line} | awk -F' ' '{print $4}'`
? ?if [ "${line_path:0:1}" != "/" ]; then?
? ? ?continue
? ?fi
? ?if [ "${line_path}" = "/" ]; then
? ? ? root_avail=${line_avail}
? ? ?#echo "root_avail:${root_avail}"
? ? ?if [ -f /tmp/tmp_root_avail ];then?
? ? ? ?rm /tmp/tmp_root_avail
? ? ?fi
? ? ?echo ${root_avail} > /tmp/tmp_root_avail
? ? ?continue
? ?fi
? path_length=${#line_path}
? if [ "${path:0:${path_length}}" = "${line_path}" ];then
? ?# echo "${path} contain path:${line_path}"?
? ? path_avail=${line_avail}
? ? if [ -f /tmp/tmp_path_avail ];then
? ? ? rm /tmp/tmp_path_avail
? ? fi
? ? echo ${path_avail} > /tmp/tmp_path_avail
? ? break
? fi
done
#############get data from temp file###############
if [ -f /tmp/tmp_path_avail ];then
?path_avail=`cat /tmp/tmp_path_avail`
?rm /tmp/tmp_path_avail
fi
if [ -f /tmp/tmp_root_avail ];then
?root_avail=`cat /tmp/tmp_root_avail`
?rm /tmp/tmp_root_avail
fi
###################compute######################
if [ -z ${path_avail} ];then
# ? echo "root_avail:${root_avail}"
# ? echo "path_avail=${path_avail}"
? ?path_avail=${root_avail}
fi
?
echo "${path_avail}"
?
保存為get_dir_avail_path.sh
chmod 777 get_dir_avail_path.sh修改權限
#usage:
# ?./get_dir_avail_space [dir]
#e.g:
# ? ./get_dir_avail_space /root
# ? ./get_dir_avail_space
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