VASResult shore_vas::mkDir(
const Path path,
mode_t mode,
lrid_t *result
);
VASResult shore_vas::rmDir(
const Path path
);
enum sm_lock_mode_t { NL = 0, IS, IX, SH, SIX, UD, EX };
typedef sm_lock_mode_t LockMode;
VASResult shore_vas::chDir(
const Path path,
LockMode optional = NL
);
lrid_t shore_vas::cwd() const;
char *shore_vas::gwd(
char *result,
int resultlen,
lrid_t *dir = 0
);
VASResult shore_vas::getRootDir(
lrid_t *dir
);
The method chDir changes the current working directory for SVAS instance. It acquires share locks on each directory in the given path. The caller may specify a lock to be acquired on the final directory in the path, if a lock stronger than a share lock is desired.
Cwd returns the OID of the current working directory. Gwd returns the path of the current working directory, or of the directory given. Gwdcomputesthepathby successively changing directories to ".." from the initial working directory to the root, and by reading the directories along the way.
All these methods except cwd acquire locks and manipulate objects, so they must be run in transactions.
GetRootDir returns the oid of the root directory for the server.
Mode is the permissions bits for the object. When a directory is created, the given mode is modified by the client process's umask.
The result must point to an area in the caller's address space into which the SVAS writes the OID of the resulting directory object. It may not be a null pointer.
ChDir will obtain a lock on the final component of the path if a lock mode is given for the argument optional. If optional is not given, a share lock is acquired.
Gwd takes a pointer to a buffer in the caller's address space ( result ) and a length, resultlen, and writes the pathname of the current working directory into the buffer. A null character (ASCII NUL) terminates the pathname. The SVAS returns an error if the pathname and its terminating NUL do not fit in the buffer given. If the caller provides a non-null pointer to the object identifier of a directory in dir, gwd calculates a pathname of the given directory instead of the current working directory.
Deadlocks can occur while locks are being acquired. See transaction(svas) for information about deadlocks.
A complete list of errors is in errors(svas).