1. UNIX for Dummies Questions & Answers

if I rename a dir mv dir dir2 Is this operation atomic? Suppose there 100 files in dir, does linux rename them one by one or at once? In other words, is there a time at which both dir and dir2 exist, with dir has, say 30 files and dir2 has the rest 70 files? (4 Replies)

2. Programming

Hello, I need to implement a locking system in C. My problem is how to make the check if the lock file exist and locking it atomic operation. I want to make something like this: FILE* lock_fname; lock_fname = fopen ( "file.lock", "r"); /*check if file exsists*/ if (lock_fname) { fclose... (7 Replies)

3. Programming

hi guys. can we use fread and fwrite with pipes to write data more than PIPE_BUF atomically since they lock FILE object until I/O operation finish? (1 Reply)

4. UNIX for Dummies Questions & Answers

Are system calls atomic operations? Is a system call can be interrupted? (2 Replies)