off_t l_len; /* Number of bytes to lock */ pid_t l_pid; /* PID of process blocking our lock (F_GETLK only) */ }; 其中l_type定义所的类型,F_RDLCK表示共享锁,F_WRLCK表示排他锁,F_UNLCK表示释放掉之前已经建立的锁;l_whence, l_start与l_len共同作用设置所加锁的范围,其中l_whence设置...
5. /* Number of bytes to lock */ 6. /* PID of process blocking our lock (F_GETLK only) */ 7. }; 1. 2. 3. 4. 5. 6. 7. 其中l_type定义所的类型,F_RDLCK表示共享锁,F_WRLCK表示排他锁,F_UNLCK表示释放掉之前已经建立的锁;l_whence, l_start与l_len共同作用设置所加锁的范围,其中...
printf("Pid: %ld process locked the file.\n",(long)getpid()); //do something while(getchar()<0); printf("Pid: %ld process release the file.\n",(long)getpid()); return 0; }
return(0);/* false, region isn't locked by another proc */ } return(lock.l_pid);/* true, return pid of lock owner */ } /***file_lock.c***/ #include "file_lock.h" staticvoid lock_set(int fd,int type) ; int main(int argc,char **argv) { int fd ; //First open file ...
= 1; locks_delete_lock(before); break; } if (request->fl_type == F_UNLCK) { if ((request->fl_flags & FL_EXISTS) && !found) error = -ENOENT; goto out; } /* * If a higher-priority process was blocked on the old file lock, * give it the opportunity to lock the file. *...
A VM area is any part of the process virtual memory * space that has a special rule for the page-fault handlers (ie a shared * library, the executable area etc). */ struct vm_area_struct { /* The first cache line has the info for VMA tree walking. */ // 分别用来保存该虚拟地址...
mount FILESYSTEM MOUNTPOINT 若要修復 XFS 文件系統,請遵循下列步驟: 使用xfs_repair -n命令檢查檔案系統錯誤,如下所示: Bash xfs_repair -n /dev/rootvg/homelv 如果檢查成功,請移除-n旗標以繼續進行修復模式,這會嘗試修正任何遇到的錯誤,如下所示: ...
xfs_repair [-L] FILESYSTEM mount FILESYSTEM MOUNTPOINT 若要修復 XFS 文件系統,請遵循下列步驟: 使用xfs_repair -n命令檢查檔案系統錯誤,如下所示: Bash xfs_repair -n /dev/rootvg/homelv 如果檢查成功,請移除-n旗標以繼續進行修復模式,這會嘗試修正任何遇到的錯誤,如下所示: ...
mount FILESYSTEM MOUNTPOINT 若要修复 XFS 文件系统,请执行以下步骤: 使用xfs_repair -n命令检查文件系统错误,如下所示: Bash xfs_repair -n /dev/rootvg/homelv 如果检查成功,请通过删除-n标志继续修复模式,这会尝试修复任何遇到的错误,如下所示:
#-priority-the priority to run user processwith#-locks-max numberoffile locks the user can hold #-sigpending-max numberofpending signals #-msgqueue-max memory used byPOSIXmessagequeues(bytes)#-nice-max nice priority allowed to raise to values:[-20,19]#-rtprio-max realtime priority ...