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> do not have that these I was referring to the transaction semantics

• Iwan-Zotow 6y ago
  > let f = File::open("username.txt"); > /what if the file is deleted here?/ you don't need transaction semantics here. On Unix file is basically inode with counter. If it doesn't have record (aka name) in directory but non-zero counter, it would exist. So on open(2) counter is bumped up and is equal to 2 (or higher if there are hardlinks), one for the directory record and one for program running it. If you remove record from directory (aka `rm filename`), counter would decrease by 1, but it is still non-zero, program still has it open, could read its content, etc. Only after close(2) counter would decrease to 0 and file would be gone. Just tested it on Ubuntu 20.4 with simple C program