Coding Guidelines/Filesystem Manipulation
Amanda supplies a few wrapper functions around the ordinary descriptor operations to handle a few common cases. In most cases, these functions are preferred over calling the wrapped function directly.
robust_open
- in common-src/file.c
This function wraps open to retry on certain failures, and sets the close-on-exec flag.
robust_close
- in common-src/file.c
This function wraps close to retry on certain failures.
fullread
- in common-src/util.c
This function calls read repeatedly until the given buffer is full, or an EOF or an error occurs. It handles interrupted syscalls appropriately.
fullwrite
- in common-src/util.c
Similarly, this function calls write repeatedly, until the entire buffer has been writte, or an error occurs.
portable_readdir
- in common-src/util.c
This function wraps the various readdir implementations that might be available, including re-entrant and 64-bit versions, preferring 64-bit compatibility and re-entrancy.