file lock in the Linux system

 

1. Use the flock in the shell script,

 

http://linux.die.net/man/1/flock

 

2. Use flock in code

http://linux.die.net/man/2/flock

 

My sample.

 

 

int fd = open("/data/misc/wifi_lock", O_RDWR|O_CREAT, S_IRWXU|S_IRWXG); if(fd > 0) flock(fd, LOCK_EX); # ... code executed under lock ... if(fd > 0) { flock(fd, LOCK_UN); close(fd); }