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87 Commits
Author SHA1 Message Date
Yu Watanabe b7e957d30f chase: drop CHASE_AT_RESOLVE_IN_ROOT earlier 
The flag will be anyway dropped in chaseat(), but let's shortcut.
 2023-07-29 21:58:29 +09:00
Yu Watanabe 5f0bae7bff chase: fix CHASE_STEP with ".." 2023-07-29 21:58:29 +09:00
Yu Watanabe 00a050b395 chase: reuse "done" to open fd of starting point 
For readability that 'done' and 'fd' are always consistent with each other.

- dir_fd == AT_FDCWD:
  - path is absolute:
    - previous: fd = open("/")
    - current:  fd = openat(AT_FDCWD, "/")
  - path is relative:
    - previous: fd = openat(AT_FDCWD, ".")
    - current:  fd = openat(AT_FDCWD, ".")
- dir_fd >= 0:
  - dir_fd points to "/":
    - previous: fd = openat(dir_fd, ".")
    - current:  fd = openat(dir_fd, "/")
  - dir_fd does not point to "/":
    - previous: fd = openat(dir_fd, ".")
    - current:  fd = openat(dir_fd, ".")

Hence, this should not change any behavior. Just refactoring.
 2023-07-29 21:58:29 +09:00
Zbigniew Jędrzejewski-Szmek d1579f0b70 Merge pull request #27885 from DaanDeMeyer/please-dont-make-me-write-more-openat-helpers 
Add more openat like helper functions
 2023-06-07 13:25:33 +02:00
Daan De Meyer 0bb5653530 Merge pull request #27918 from yuwata/chase-filename 
chase: handle root path more carefully in chase_and_open()
 2023-06-06 15:01:37 +02:00
Daan De Meyer 3c8f449cc8 chase: Allow passing NULL as the empty path to chaseat() 
Per coding style, we should accept NULL as the empty path.
 2023-06-06 14:42:03 +02:00
Yu Watanabe 308b189511 chase: fix triggering assertion 2023-06-05 10:22:47 +02:00
Yu Watanabe 3991f35fbd chase: handle root path more carefully in chase_and_open() 
chase_and_open() may be called with relative root path.
 2023-06-05 15:50:46 +09:00
Daan De Meyer 420d2e3136 fs-util: Add XOpenFlags with XO_LABEL flag to have xopenat() MAC label files/dirs 2023-05-31 13:15:56 +02:00
Yu Watanabe 60e761d8f3 chase: replace path_prefix_root_cwd() with chaseat_prefix_root() 
The function path_prefix_root_cwd() was introduced for prefixing the
result from chaseat() with root, but
- it is named slightly generic,
- the logic is different from what chase() does.

This makes the name more explanative and specific for the result of the
chaseat(), and make the logic consistent with chase().

Fixes https://github.com/systemd/systemd/pull/27199#issuecomment-1511387731.

Follow-up for #27199.
 2023-04-19 03:38:59 +09:00
Yu Watanabe 9a0dcf03fa chase: prefix with the root directory only when it is not "/" 2023-04-19 03:28:34 +09:00
Yu Watanabe 237bf933de chase: drop repeated call of empty_to_root() 2023-04-19 03:28:34 +09:00
Yu Watanabe b3ef56bc8e chase: update outdated comment about result path 2023-04-19 03:28:34 +09:00
Yu Watanabe 24be89ebd8 chase: make the result absolute when a symlink is absolute 
As the path may be outside of the specified dir_fd.
 2023-04-19 03:28:34 +09:00
Yu Watanabe c0552b359c chase: make chaseat() provides absolute path also when dir_fd points to the root directory 
Usually, we pass the file descriptor of the root directory to chaseat()
when `--root=` is not specified. Previously, even in such case, the
result was relative, and we need to prefix the path with "/" when we
want to pass the path to other functions that do not support dir_fd, or
log or show the path. That's inconvenient.
 2023-04-19 03:28:34 +09:00
Yu Watanabe 4ea0bcb922 chase: CHASE_MKDIR_0755 requires CHASE_NONEXISTENT and/or CHASE_PARENT 
When CHASE_MKDIR_0755 is specified without CHASE_NONEXISTENT and
CHASE_PARENT, then chase() succeeds only when the file specified by
the path already exists, and in that case, chase() does not create
any parent directories, and CHASE_MKDIR_0755 is meaningless.

Let's mention that CHASE_MKDIR_0755 needs to be specified with
CHASE_NONEXISTENT or CHASE_PARENT, and adds a assertion about that.
 2023-04-14 16:36:13 +09:00
Yu Watanabe 5a2f674a00 chase: use FLAGS_SET() macro 2023-04-14 16:28:54 +09:00
Yu Watanabe 0d68cd72b6 chase: drop redundant call of delete_trailing_chars() 
In that branch, 'root' is a non-root and absolute path.
Hence, delete_trailing_chars() does not make the path empty.
And, if the path contains redundant slashes at the end, that will be
dropped by path_simplify().
 2023-04-11 09:06:05 +02:00
Yu Watanabe a6ef5ef707 chase: use dir_fd_is_root() to check if fd points to the root directory 
As commented in dir_fd_is_root(), comparing inode is not enough to
determine if we are at the root directory.
 2023-04-10 09:55:29 +09:00
Yu Watanabe 4443e3003a chase: use stat_inode_same() at one more place 2023-04-10 09:45:21 +09:00
Yu Watanabe 75adfc3b17 chase: drop one redundant call of fstat() 
Now, 'st' is always synced with 'fd'. Hence, we can use
stat_verify_directory().
 2023-04-10 08:43:31 +09:00
Yu Watanabe ad66c7f1d3 chase: make struct stat always sync with the opened fd 
Previously, struct stat may not be correctly synced with the currently
opened fd, e.g. when a path contains symlink which points to an absolute
path.

This also rename variables for struct stat, to make them consistent with
the corresponding fd.
 2023-04-10 08:40:14 +09:00
Yu Watanabe db0096f2ad chase: drop unnecessary conditions for buffer 2023-04-10 08:17:07 +09:00
Yu Watanabe e212f42279 fd-util: introduce dir_fd_is_root_or_cwd() 2023-04-05 00:52:56 +09:00
Yu Watanabe 21eac258f8 chase: fix error handling 
Fixes a bug introduced by 63bfd52f48.
 2023-04-04 09:20:09 +02:00
Daan De Meyer 5ccf06074a Merge pull request #27064 from DaanDeMeyer/chase-fixes 
Chase fixes
 2023-03-30 11:44:33 +02:00
Daan De Meyer ee6fea2b7f Merge pull request #27063 from yuwata/chase-graceful 
chase: gracefully drop CHASE_AT_RESOLVE_IN_ROOT when AT_FDCWD is specified
 2023-03-30 11:44:17 +02:00
Yu Watanabe 8bf26bfe26 chase: add CHASE_AT_RESOLVE_IN_ROOT only when it is necessary 2023-03-30 16:29:45 +09:00
Yu Watanabe e115daa6a8 chase: drop CHASE_AT_RESOLVE_IN_ROOT when AT_FDCWD or root dir fd is specified 
If we get AT_FDCWD or root dir fd, we always resolve symlinks relative to the host's root.
Hence, the flag is meaningless.
 2023-03-30 16:29:37 +09:00
Daan De Meyer 708e88704b chase: Simplify chase_and_open() and chase_and_openat() 
xopenat() now calls fd_reopen() if an empty path is specified, so
let's make use of that to simplify the chase open helpers.
 2023-03-30 09:04:14 +02:00
Daan De Meyer 16859751ca chase: Fix error code check 2023-03-30 09:04:14 +02:00
Daan De Meyer 11659e4830 chase: Fix formatting 2023-03-30 09:04:14 +02:00
Yu Watanabe 6d5d3e207b chase: fix indentation 2023-03-30 14:52:13 +09:00
Yu Watanabe 52576a7503 chase: fix comment 2023-03-30 14:52:13 +09:00
Daan De Meyer 670afc182a chase-symlinks: Add chase_and_open_parent() + at() variant 
Helper to chase a path, pin its parent directory and return the filename
of the resolved path in its parent directory.
 2023-03-26 20:31:10 +02:00
Daan De Meyer e5f2490200 chase-symlinks: Allow optional path with CHASE_EXTRACT_FILENAME 
This allows helpers to set it unconditionally even if the caller
is not interested in the path.
 2023-03-24 13:53:45 +01:00
Daan De Meyer f461a28da7 chase-symlinks: Rename chase_symlinks() to chase() 
Chasing symlinks is a core function that's used in a lot of places
so it deservers a less verbose names so let's rename it to chase()
and chaseat().

We also slightly change the pattern used for the chaseat() helpers
so we get chase_and_openat() and similar.
 2023-03-24 13:43:51 +01:00