fcntl flock文件记录锁

fcntl flock

 

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#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> int FileUnLock(int fd_lock) {     struct flock strLock;     strLock.l_type = F_UNLCK;     strLock.l_whence = SEEK_SET;     strLock.l_start = 0;     strLock.l_len = 0;     return fcntl(fd_lock,F_SETLK,&strLock); } int FileSetLock(int fd_lock) {     struct flock strLock;     //  strLock.l_type = F_WRLCK;     strLock.l_type = F_RDLCK;     strLock.l_whence = SEEK_SET;     strLock.l_start = 0;     strLock.l_len = 0;     return fcntl(fd_lock,F_SETLK,&strLock); }

 fopen打开函数

int fd = 0;

    fd = fileno()