NAME¶
rfio_stat - get information about a file or directory
SYNOPSIS¶
#include <sys/types.h>
#include "rfio_api.h"
int rfio_stat (const char *path, struct stat
*statbuf);
int rfio_fstat (int s, struct stat *statbuf);
int rfio_lstat (const char *path, struct stat
*statbuf);
int rfio_mstat (const char *path, struct stat
*statbuf);
int rfio_mstat_reset ();
int rfio_end ();
Under Linux, for large files:
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include "rfio_api.h"
int rfio_stat64 (const char *path, struct stat64
*statbuf);
int rfio_fstat64 (int s, struct stat64
*statbuf);
int rfio_lstat64 (const char *path, struct stat64
*statbuf);
int rfio_mstat64 (const char *path, struct stat64
*statbuf);
For large files, under other systems:
#include <sys/types.h>
#include "rfio_api.h"
int rfio_stat64 (const char *path, struct stat64
*statbuf);
int rfio_fstat64 (int s, struct stat64
*statbuf);
int rfio_lstat64 (const char *path, struct stat64
*statbuf);
int rfio_mstat64 (const char *path, struct stat64
*statbuf);
DESCRIPTION¶
rfio_stat gets information about a file or directory.
rfio_lstat is identical to
rfio_stat except for symbolic links. In
this case, the link itself is statted and not followed.
rfio_fstat is identical to
rfio_stat but works on the file
descriptor
s returned by
rfio_open.
rfio_mstat is identical to
rfio_stat but keeps the connection open
to the server unless there are more than MAXMCON connections already opened.
This is useful when issuing a series of stat calls. The last
rfio_mstat
call should be followed by a call to
rfio_end.
rfio_mstat_reset is to be used when your program is forking. In such a
case the permanent connections opened with
rfio_mstat become shared
between the parent and the child. Use
rfio_mstat_reset to perform the
necessary reset and close of the socket file descriptor in the parent or the
child in order to be sure that only of them will receice an answer from the
RFIO daemon.
See NOTES section below.
- path
- specifies the logical pathname relative to the current directory or the
full pathname.
- statbuf
- is a pointer to a stat structure, receiving result of your
query.
The 64 bits functions must be used for large files. They have the same syntax as
the normal stat functions except that they use a
stat64 structure.
RETURN VALUE¶
This routine returns 0 if the operation was successful or -1 if the operation
failed. In the latter case,
serrno is set appropriately.
NOTES¶
Multiple connections using rfio_mstat are thread-safe but not process-wide,
therefore a forked child can share file descriptors opened with rfio_mstat by
its parent. Use
rfio_mstat_reset in such case.
Multiple connections behaviour is undefined if you work in a multi-threaded
environment and with threads
not created using the LCG's
Cthread
interface.
ERRORS¶
- ENOENT
- The named file/directory does not exist or is a null pathname.
- EBADF
- s is not a valid file descriptor.
- EACCES
- Search permission is denied on a component of the path prefix.
- EFAULT
- path or statbuf is a NULL pointer.
- ENOTDIR
- A component of path prefix is not a directory.
- ENAMETOOLONG
- The length of path exceeds CA_MAXPATHLEN or the length of a
path component exceeds CA_MAXNAMELEN.
- SENOSHOST
- Host unknown.
- SENOSSERV
- Service unknown.
- SECOMERR
- Communication error.
SEE ALSO¶
Castor_limits(4),
rfio_chmod(3),
rfio_chown(3),
Cthread(3)
AUTHOR¶
LCG Grid Deployment Team