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chase: CHASE_MKDIR_0755 requires CHASE_NONEXISTENT and/or CHASE_PARENT

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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.
This commit is contained in:
Yu Watanabe
2023-04-14 16:36:13 +09:00
parent 5a2f674a00
commit 4ea0bcb922
3 changed files with 10 additions and 3 deletions
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src/basic/chase.h
+8 -2
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@@ -24,8 +24,14 @@ typedef enum ChaseFlags {
* full path is still stored in ret_path and only the returned
* file descriptor will point to the parent directory. Note that
* the result path is the root or '.', then the file descriptor
* also points to the result path even if this flag is set. */
CHASE_MKDIR_0755 = 1 << 11, /* Create any missing parent directories in the given path. */
* also points to the result path even if this flag is set.
* When this specified, chase() will succeed with 1 even if the
* file points to the last path component does not exist. */
CHASE_MKDIR_0755 = 1 << 11, /* Create any missing parent directories in the given path. This
* needs to be set with CHASE_NONEXISTENT and/or CHASE_PARENT.
* Note, chase_and_open() or friends always add CHASE_PARENT flag
* when internally call chase(), hence CHASE_MKDIR_0755 can be
* safely set without CHASE_NONEXISTENT and CHASE_PARENT. */
CHASE_EXTRACT_FILENAME = 1 << 12, /* Only return the last component of the resolved path */
} ChaseFlags;