| author |  Pat Tullmann <pat.github@tullmann.org> 2025-02-18 17:04:19-08:00 |
| committer |  Alex Rønne Petersen <alex@alexrp.com> 2025-02-21 07:29:15+01:00 |
| log | 8d9bb9746165abf067851f490cfea8c49fbd59ea |
| tree | 44fb283773dcc88f532ead40be9ac20cf9c242d5 |
| parent | a8d3760c5bc31ed114516c89f31d9107b803a6b7 |
posix: access/accessZ/faccessat/faccessatZ can return AccessDenied or PermissionDenied
`EACCES` is returned if the file mode bit (i.e., user/group/other rwx
bits) disallow access. `EPERM` is returned if something else denies
access (immutable bit, SELinux, capabilities, etc). This somewhat subtle
no-access distinction is part of POSIX. For now map both to
`error.PermissionDenied` to keep the error signature unchanged. See
duopoly.
This PR is effecitvely an update/simplification of PR #19193.
Tested locally with an immutable file.
Fixes #22733 and #19162.1 files changed, 2 insertions(+), 0 deletions(-)
lib- std
lib/std/posix.zig+2
| ... | ... | @@ -4914,6 +4914,7 @@ pub fn accessZ(path: [*:0]const u8, mode: u32) AccessError!void { |
| 4914 | 4914 | switch (errno(system.access(path, mode))) { |
| 4915 | 4915 | .SUCCESS => return, |
| 4916 | 4916 | .ACCES => return error.PermissionDenied, |
| 4917 | .PERM => return error.PermissionDenied, | |
| 4917 | 4918 | .ROFS => return error.ReadOnlyFileSystem, |
| 4918 | 4919 | .LOOP => return error.SymLinkLoop, |
| 4919 | 4920 | .TXTBSY => return error.FileBusy, |
| ... | ... | @@ -4999,6 +5000,7 @@ pub fn faccessatZ(dirfd: fd_t, path: [*:0]const u8, mode: u32, flags: u32) Acces |
| 4999 | 5000 | switch (errno(system.faccessat(dirfd, path, mode, flags))) { |
| 5000 | 5001 | .SUCCESS => return, |
| 5001 | 5002 | .ACCES => return error.PermissionDenied, |
| 5003 | .PERM => return error.PermissionDenied, | |
| 5002 | 5004 | .ROFS => return error.ReadOnlyFileSystem, |
| 5003 | 5005 | .LOOP => return error.SymLinkLoop, |
| 5004 | 5006 | .TXTBSY => return error.FileBusy, |