4. Path Resolution

• no-one reads path_resolution(7); slide
• This was done as the most significant part of the proof-of-concept.
• source file name on screen

4.1 Start of the Resolution Process

• root vs currdir inode; slide
• prints absolute paths for background processes

4.2 Walk Along the Path

• EACCES directory; slide
• ENOENT directory; slide
• ENOENT directory fuzzy typos; slide
• ENOTDIR; slide
• ENOENT dangling symlink; slide
• ELOOP; slide
• EMLINK; slide

4.3 Find the Final Entry

• as above
• EEXIST; slide
• ENOTDIR; slide
• ELOOP O_NOFOLLOW; slide
• EINVAL wrong file type; slide
• EPERM sticky bit; slide

4.4 Limits

• ENAMETOOLONG pathname; slide
• ENAMETOOLONG filename; slide
• ENOENT empty; slide

4.5 Permissions

• this takes a lot of explaining; slide
• permission bits are not bit-wise ORed together
• file "--x" and directory "--x" are different