I have a textfile (qrs.txt) which contains dir names (one per line) and on my server in the same directory as the script I have those folders with corresponding names from the text file. This is my script: #!/bin/bashwhilereadp;doif[ ! -d"$p"];thenecho"ERROR$p">> log.txtel...
existSync()方法同步检查给定目录的存在。...如果您更喜欢使用异步检查,请改用fs.access()方法。 此方法将路径作为输入并测试用户的权限。...让我们看下面的示例,该示例使用fs.access()检查给定目录是否存在: const fs = require('fs'); // directory to check if exists const ...
(推荐:java视频教程) /** *判断文件夹是否存在 * @param file */ public void checkDirExists...,创建目录"); file.mkdir(); } } } exists() public boolean exists()测试此抽象路径名表示的文件或目录是否存在...抛出:SecurityException如果存在安全管理器,且其SecurityManager.checkRead(java.lang.String)...
The flag -d allows you to test whether a file is a directory or not. For example, to check whether the /etc/docker directory exists, you would use:FILE=/etc/docker if [ -d "$FILE" ]; then echo "$FILE is a directory." fi Copy ...
-p, --parents no error if existing, make parent directories as needed so it shouldn't error if the dir exists, yet ls -l / shows: d??? ? ? ? ? ? files so according to this (d), it is a directory, but it isn't according to test -d. I believe a better error message...
When writing Python scripts, you may want to perform a certain action only if a file or directory exists or not. For example, you may want to read or write data to a configuration file or to create the file only if it already doesn't exist.
ConditionPathExists=/etc/rc.local [Service] Type=forking ExecStart=/etc/rc.local start TimeoutSec=0 StandardOutput=tty RemainAfterExit=yes SysVStartPriority=99 [Install] WantedBy=multi-user.target 3.创建文件rc.local sudo vim /etc/rc.local ...
First of all, check * that we are not asked to creat(2) an obvious directory - that * will not do. */ error = -EISDIR; if (nd->last_type != LAST_NORM || nd->last.name[nd->last.len]) goto exit 调用参数flag中的O_CREAT标志位表示如果要打开的文件不存在就创建这个文件。所以,...
当A不存在时, grep再次失败,因为find只打印到stderr: $ rmdir A $ find A -maxdepth 0 -not -empty -print | head -n1 | grep -q . && echo 'not empty' || echo 'empty' find: 'A': No such file or directory empty 用任何其他findexpression式replace-not -empty ,但要小心,如果你执行打印...
# check a file to be a correct runlevel script check_runlevel () { # Check if the file exists at all. [ -x "$1" ] || return 1 is_ignored_file "$1" && return 1 return 0 } [root@37-test ~]# more /etc/rc.d/init.d/crond ...