bash 进程退出时群会自动释放吗？
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Is flock automatically released on process exit?
提问by Bandicoot
In a bash script in Linux, I am using flock [the command flock, not the system call flock()] to implement file locking thereby guarding concurrent access against a shared resource [which is a file in tmpfs].
在 Linux 的 bash 脚本中，我使用 flock [命令 flock，而不是系统调用 flock()] 来实现文件锁定，从而保护对共享资源 [这是 tmpfs 中的文件] 的并发访问。
I have trap handlers to handle abnormal termination of my script:
trap "{ rm -rf $LOCK ; rm -rf $TMPFS_FILE; exit 255; }" SIGINT SIGTERM
我有陷阱处理程序来处理我的脚本的异常终止：
trap "{ rm -rf $LOCK ; rm -rf $TMPFS_FILE; exit 255; }" SIGINT SIGTERM
where $LOCK is my lock file and $TMPFS_FILE is my shared resource.
其中 $LOCK 是我的锁定文件，$TMPFS_FILE 是我的共享资源。
My question is do I need to explicitly do a file unlock as well ? Or does Linux do it for me upon all program termination [both voluntary termination as well as forced] scenarios ?
我的问题是我是否还需要明确地进行文件解锁？还是 Linux 在所有程序终止 [自愿终止和强制终止] 情况下为我做这件事？
回答by Paused until further notice.
From man 1 flock:
来自man 1 flock：
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be required in special cases, for example if the enclosed com‐ mand group may have forked a background process which should not be holding the lock.
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be required in special cases, for example if the enclosed com‐ mand group may have forked a background process which should not be holding the lock.
