Hi,
On Thursday 12 August 2010 19:09:42 Jeff Squyres wrote:
> On Aug 12, 2010, at 7:21 AM, Terry Dontje wrote:
> > Is there not a way to determine whether the fs is tmpfs or not?
> I don't know -- Rainer?
Well, this is semi-portable ,-]
But sure, it would work on Linux, where we'd want it:
./statfs /dev/shm
--------------- statfs() output-----------------
statfs() returned the following information
about file system of path (/dev/shm):
f_type : TMPFS (1021994)
f_bsize : 4096
f_blocks : 723663
f_bfree : 723662
f_bavail : 723662
f_files : 723663
f_ffree : 723661
f_fsid : TMPFS (0x0)
f_namelen : 255
(the program detects most Filesystems according to their known magic).
Regards,
Rainer
--
----------------------------------------------------------------
Dr.-Ing. Rainer Keller http://www.hlrs.de/people/keller
HLRS Tel: ++49 (0)711-685 6 5858
Nobelstrasse 19 Fax: ++49 (0)711-685 6 5832
70550 Stuttgart email: kel...@hlrs.de
Germany AIM/Skype:rusraink
/*
* Copyright (c) 2009 Oak Ridge National Labs. All rights reserved.
*
* Author: Rainer Keller
*/
#define HAVE_LINUX_MAGIC_H
#define HAVE_SYS_MOUNT_H
#define HAVE_SYS_STATFS_H
#define HAVE_SYS_STATVFS_H
#define HAVE_SYS_TYPES_H
#define HAVE_SYS_VFS_H
#define HAVE_STRINGS_H
#include <stdio.h>
#include <inttypes.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_LINUX_MAGIC_H
#include <linux/magic.h>
#endif
#ifndef ADFS_SUPER_MAGIC
#define ADFS_SUPER_MAGIC 0xadf5
#endif
#ifndef AFFS_SUPER_MAGIC
#define AFFS_SUPER_MAGIC 0xadff
#endif
#ifndef AFS_SUPER_MAGIC
#define AFS_SUPER_MAGIC 0x5346414F
#endif
#ifndef AUTOFS_SUPER_MAGIC
#define AUTOFS_SUPER_MAGIC 0x0187
#endif
#ifndef BEFS_SUPER_MAGIC
#define BEFS_SUPER_MAGIC 0x42465331
#endif
#ifndef BFS_MAGIC
#define BFS_MAGIC 0x1BADFACE
#endif
#ifndef BINFMT_MISC_SUPER_MAGIC
#define BINFMT_MISC_SUPER_MAGIC 0x42494e4d
#endif
#ifndef CGROUP_SUPER_MAGIC
#define CGROUP_SUPER_MAGIC 0x27e0eb
#endif
#ifndef CIFS_MAGIC_NUMBER
#define CIFS_MAGIC_NUMBER 0xFF534D42
#endif
#ifndef CODA_SUPER_MAGIC
#define CODA_SUPER_MAGIC 0x73757245
#endif
#ifndef COH_SUPER_MAGIC
#define COH_SUPER_MAGIC 0x012FF7B7
#endif
#ifndef CRAMFS_MAGIC
#define CRAMFS_MAGIC 0x28cd3d45
#endif
#ifndef DEBUGFS_MAGIC
#define DEBUGFS_MAGIC 0x64626720
#endif
#ifndef DEVFS_SUPER_MAGIC
#define DEVFS_SUPER_MAGIC 0x1373
#endif
#ifndef DEVPTS_SUPER_MAGIC
#define DEVPTS_SUPER_MAGIC 0x1cd1
#endif
#ifndef ECRYPTFS_SUPER_MAGIC
#define ECRYPTFS_SUPER_MAGIC 0xf15f
#endif
#ifndef EFS_SUPER_MAGIC
#define EFS_SUPER_MAGIC 0x414A53
#endif
#ifndef EXOFS_SUPER_MAGIC
#define EXOFS_SUPER_MAGIC 0x5DF5
#endif
#ifndef EXT_SUPER_MAGIC
#define EXT_SUPER_MAGIC 0x137D
#endif
#ifndef EXT2_OLD_SUPER_MAGIC
#define EXT2_OLD_SUPER_MAGIC 0xEF51
#endif
#ifndef EXT2_SUPER_MAGIC
#define EXT2_SUPER_MAGIC 0xEF53
#endif
#ifndef EXT3_SUPER_MAGIC
#define EXT3_SUPER_MAGIC 0xEF53
#endif
#ifndef EXT4_SUPER_MAGIC
#define EXT4_SUPER_MAGIC 0xEF53
#endif
#ifndef FUSE_CTL_SUPER_MAGIC
#define FUSE_CTL_SUPER_MAGIC 0x65735543
#endif
#ifndef FUSE_SUPER_MAGIC
#define FUSE_SUPER_MAGIC 0x65735546
#endif
#ifndef FUTEXFS_SUPER_MAGIC
#define FUTEXFS_SUPER_MAGIC 0xBAD1DEA
#endif
#ifndef GFS2_MAGIC
#define GFS2_MAGIC 0x01161970
#endif
#ifndef GPFS_SUPER_MAGIC
#define GPFS_SUPER_MAGIC 0x47504653
#endif
#ifndef HFS_SUPER_MAGIC
#define HFS_SUPER_MAGIC 0x4244
#endif
#ifndef HFSPLUS_SUPER_MAGIC
#define HFSPLUS_SUPER_MAGIC 0x482b
#endif
#ifndef HOSTFS_SUPER_MAGIC
#define HOSTFS_SUPER_MAGIC 0x00c0ffee
#endif
#ifndef HPFS_SUPER_MAGIC
#define HPFS_SUPER_MAGIC 0xf995e849
#endif
#ifndef HPPFS_SUPER_MAGIC
#define HPPFS_SUPER_MAGIC 0xb00000ee
#endif
#ifndef HUGETLBFS_MAGIC
#define HUGETLBFS_MAGIC 0x958458f6
#endif
#ifndef INOTIFYFS_SUPER_MAGIC
#define INOTIFYFS_SUPER_MAGIC 0x2BAD1DEA
#endif
#ifndef ISOFS_SUPER_MAGIC
#define ISOFS_SUPER_MAGIC 0x9660
#endif
#ifndef JFFS2_SUPER_MAGIC
#define JFFS2_SUPER_MAGIC 0x72b6
#endif
#ifndef JFS_SUPER_MAGIC
#define JFS_SUPER_MAGIC 0x3153464a
#endif
#ifndef LL_SUPER_MAGIC
#define LL_SUPER_MAGIC 0x0BD00BD0
#endif
#ifndef MINIX_SUPER_MAGIC
#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
#endif
#ifndef MINIX_SUPER_MAGIC2
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#endif
#ifndef MINIX2_SUPER_MAGIC
#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
#endif
#ifndef MINIX2_SUPER_MAGIC2
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
#endif
#ifndef MINIX3_SUPER_MAGIC
#define MINIX3_SUPER_MAGIC 0x4d5a /* minix V3 fs */
#endif
#ifndef MSDOS_SUPER_MAGIC
#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
#endif
#ifndef NCP_SUPER_MAGIC
#define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */
#endif
#ifndef NFS_SUPER_MAGIC
#define NFS_SUPER_MAGIC 0x6969 /* Network File System by Sun */
#endif
#ifndef NTFS_SB_MAGIC
#define NTFS_SB_MAGIC 0x5346544e
#endif
#ifndef OCFS2_SUPER_MAGIC
#define OCFS2_SUPER_MAGIC 0x7461636f
#endif
#ifndef OPENPROM_SUPER_MAGIC
#define OPENPROM_SUPER_MAGIC 0x9fa1
#endif
#ifndef PAN_KERNEL_FS_CLIENT_SUPER_MAGIC
#define PAN_KERNEL_FS_CLIENT_SUPER_MAGIC 0xAAD7AAEA /* Panasas FS */
#endif
#ifndef PROC_SUPER_MAGIC
#define PROC_SUPER_MAGIC 0x9fa0 /* Proc virtual file system */
#endif
#ifndef PVFS2_SUPER_MAGIC
#define PVFS2_SUPER_MAGIC 0x20030528 /* Parallel Virtual File System 2 -- note PVFS(1) was a library and therefore in userspace) */
#endif
#ifndef QNX4_SUPER_MAGIC
#define QNX4_SUPER_MAGIC 0x002f /* qnx4 fs detection */
#endif
#ifndef REISERFS_SUPER_MAGIC
#define REISERFS_SUPER_MAGIC 0x52654973 /* used by gcc */
#endif
#ifndef ROMFS_MAGIC
#define ROMFS_MAGIC 0x7275
#endif
#ifndef SECURITYFS_MAGIC
#define SECURITYFS_MAGIC 0x73636673
#endif
#ifndef SELINUX_MAGIC
#define SELINUX_MAGIC 0xf97cff8c
#endif
#ifndef SMB_SUPER_MAGIC
#define SMB_SUPER_MAGIC 0x517B
#endif
#ifndef SQUASHFS_MAGIC
#define SQUASHFS_MAGIC 0x73717368
#endif
#ifndef SYSFS_MAGIC
#define SYSFS_MAGIC 0x62656572
#endif
#ifndef SYSV2_SUPER_MAGIC
#define SYSV2_SUPER_MAGIC 0x012FF7B6
#endif
#ifndef SYSV4_SUPER_MAGIC
#define SYSV4_SUPER_MAGIC 0x012FF7B5
#endif
#ifndef TMPFS_MAGIC
#define TMPFS_MAGIC 0x01021994
#endif
#ifndef UBIFS_SUPER_MAGIC
#define UBIFS_SUPER_MAGIC 0x24051905
#endif
#ifndef UDF_SUPER_MAGIC
#define UDF_SUPER_MAGIC 0x15013346
#endif
#ifndef UFS_MAGIC
#define UFS_MAGIC 0x00011954
#endif
#ifndef UFS2_MAGIC
#define UFS2_MAGIC 0x19540119
#endif
#ifndef USBDEVICE_SUPER_MAGIC
#define USBDEVICE_SUPER_MAGIC 0x9fa2
#endif
#ifndef VXFS_SUPER_MAGIC
#define VXFS_SUPER_MAGIC 0xa501FCF5
#endif
#ifndef XENIX_SUPER_MAGIC
#define XENIX_SUPER_MAGIC 0x012FF7B4
#endif
#ifndef XFS_SUPER_MAGIC
#define XFS_SUPER_MAGIC 0x58465342
#endif
#ifndef _XIAFS_SUPER_MAGIC
#define _XIAFS_SUPER_MAGIC 0x012FD16D
#endif
#define MASK1 0xff
#define MASK2 0xffff
#define MASK3 0xffffff
#define MASK4 0xffffffff
#define F_FLAGS_VIRTUAL 0x1
#define F_FLAGS_PHYSICAL 0x2
#define F_FLAGS_PARALLEL 0x4
#define F_FLAGS_JOURNALING_POSSIBLE 0x8
#define F_FLAGS_JOURNALING_ALWAYS 0x10
#define F_FLAGS_JOURNALING_ALWAYS 0x10
struct fs_type_names_t {
unsigned long long f_fsid;
unsigned long long f_mask;
// unsigned long long f_flags;
char * f_fsname;
} fs_type_names[] = {
{ADFS_SUPER_MAGIC, MASK2, "ADFS"},
{AFFS_SUPER_MAGIC, MASK2, "AFFS"},
{AFS_SUPER_MAGIC, MASK4, "AFS"},
{AUTOFS_SUPER_MAGIC, MASK2, "AUTOFS"},
{BEFS_SUPER_MAGIC, MASK4, "BEFS"},
{BFS_MAGIC, MASK4, "BFS"},
{BINFMT_MISC_SUPER_MAGIC, MASK4, "BINFMT_MISC"},
{CGROUP_SUPER_MAGIC, MASK3, "CGROUP"},
{CIFS_MAGIC_NUMBER, MASK4, "CIFS"},
{CODA_SUPER_MAGIC, MASK4, "CODA"},
{COH_SUPER_MAGIC, MASK4, "COH"},
{CRAMFS_MAGIC, MASK4, "CRAMFS"},
{DEBUGFS_MAGIC, MASK4, "DEBUGFS"},
{DEVFS_SUPER_MAGIC, MASK2, "DEVFS"},
{DEVPTS_SUPER_MAGIC, MASK2, "DEVPTS"},
{ECRYPTFS_SUPER_MAGIC, MASK4, "ECRYPTFS"},
{EFS_SUPER_MAGIC, MASK3, "EFS"},
{EXOFS_SUPER_MAGIC, MASK2, "EXOFS"},
{EXT_SUPER_MAGIC, MASK2, "EXT"},
{EXT2_OLD_SUPER_MAGIC, MASK2, "EXT2 (old)"},
{EXT2_SUPER_MAGIC, MASK2, "EXT2/EXT3/EXT4"}, /* Attributes distinguish EXT2-EXT4 */
{EXT3_SUPER_MAGIC, MASK2, "EXT3/EXT4"}, /* Attributes distinguish EXT2-EXT4 */
{EXT4_SUPER_MAGIC, MASK2, "EXT4"}, /* Attributes distinguish EXT2-EXT4 */
{FUSE_CTL_SUPER_MAGIC, MASK4, "FUSE (ctl)"},
{FUSE_SUPER_MAGIC, MASK4, "FUSE"},
{FUTEXFS_SUPER_MAGIC, MASK4, "FUTEXFS"},
{GFS2_MAGIC, MASK4, "GFS2"},
{GPFS_SUPER_MAGIC, MASK4, "GPFS"},
{HFS_SUPER_MAGIC, MASK2, "HFS"},
{HFSPLUS_SUPER_MAGIC, MASK2, "HFSPLUS"},
{HOSTFS_SUPER_MAGIC, MASK4, "HOSTFS"},
{HPFS_SUPER_MAGIC, MASK4, "HPFS"},
{HPPFS_SUPER_MAGIC, MASK4, "HPPFS"},
{HUGETLBFS_MAGIC, MASK4, "HUGETLBFS"},
{INOTIFYFS_SUPER_MAGIC, MASK4, "INOTIFY"},
{ISOFS_SUPER_MAGIC, MASK2, "ISOFS"},
{JFFS2_SUPER_MAGIC, MASK2, "JFFS2"},
{JFS_SUPER_MAGIC, MASK4, "JFS"},
{LL_SUPER_MAGIC, MASK4, "LUSTRE"},
{MINIX_SUPER_MAGIC, MASK2, "MINIX"},
{MINIX_SUPER_MAGIC2, MASK2, "MINIX (alternative)"},
{MINIX2_SUPER_MAGIC, MASK2, "MINIX2"},
{MINIX2_SUPER_MAGIC2, MASK2, "MINIX2 (alternative)"},
{MINIX3_SUPER_MAGIC, MASK2, "MINIX3"},
{MSDOS_SUPER_MAGIC, MASK2, "MSDOS"},
{NCP_SUPER_MAGIC, MASK2, "NCP"},
{NFS_SUPER_MAGIC, MASK2, "NFS"},
{NTFS_SB_MAGIC, MASK4, "NTFS"},
{OCFS2_SUPER_MAGIC, MASK4, "OCFS2"},
{OPENPROM_SUPER_MAGIC, MASK2, "OPENPROM"},
{PAN_KERNEL_FS_CLIENT_SUPER_MAGIC, MASK4, "PANFS"},
{PROC_SUPER_MAGIC, MASK2, "PROC"},
{PVFS2_SUPER_MAGIC, MASK4, "PVFS2"},
{QNX4_SUPER_MAGIC, MASK2, "QNX4"},
{REISERFS_SUPER_MAGIC, MASK4, "REISERFS"},
{ROMFS_MAGIC, MASK2, "ROMFS"},
{SECURITYFS_MAGIC, MASK4, "SECURITYFS"},
{SELINUX_MAGIC, MASK4, "SELINUX"},
{SMB_SUPER_MAGIC, MASK2, "SMB"},
{SQUASHFS_MAGIC, MASK4, "SQUASHFS"},
{SYSFS_MAGIC, MASK4, "SYSFS"},
{SYSV2_SUPER_MAGIC, MASK4, "SYSV2"},
{SYSV4_SUPER_MAGIC, MASK4, "SYSV4"},
{TMPFS_MAGIC, MASK4, "TMPFS"},
{UBIFS_SUPER_MAGIC, MASK4, "UBIFS"},
{UDF_SUPER_MAGIC, MASK4, "UDF"},
{UFS_MAGIC, MASK4, "UFS"},
{UFS2_MAGIC, MASK4, "UFS2"},
{USBDEVICE_SUPER_MAGIC, MASK2, "USBDEVICE"},
{VXFS_SUPER_MAGIC, MASK4, "VXFS"},
{XENIX_SUPER_MAGIC, MASK4, "XENIX"},
{XFS_SUPER_MAGIC, MASK4, "XFS"},
{_XIAFS_SUPER_MAGIC, MASK4, "_XIAFS"}
};
int main(int argc, char * argv[])
{
char * path = "/";
struct statfs statfs_buf;
if (argc > 1) {
path = argv[1];
}
printf ("--------------- statfs() output-----------------\n");
#if 0
/* On Linux */
struct statfs {
long f_type; /* type of file system (see below) */
long f_bsize; /* optimal transfer block size */
long f_blocks; /* total data blocks in file system */
long f_bfree; /* free blocks in fs */
long f_bavail; /* free blocks avail to non-superuser */
long f_files; /* total file nodes in file system */
long f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* file system id */
long f_namelen; /* maximum length of filenames */
};
/* On MacOSX: */
#define MFSTYPENAMELEN 16 /* length of fs type name including null */
#define MAXPATHLEN 1024
#define MNAMELEN MAXPATHLEN
struct statfs { /* when _DARWIN_FEATURE_64_BIT_INODE is defined */
uint32_t f_bsize; /* fundamental file system block size */
int32_t f_iosize; /* optimal transfer block size */
uint64_t f_blocks; /* total data blocks in file system */
uint64_t f_bfree; /* free blocks in fs */
uint64_t f_bavail; /* free blocks avail to non-superuser */
uint64_t f_files; /* total file nodes in file system */
uint64_t f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* file system id */
uid_t f_owner; /* user that mounted the filesystem */
uint32_t f_type; /* type of filesystem */
uint32_t f_flags; /* copy of mount exported flags */
uint32_t f_fssubtype; /* fs sub-type (flavor) */
char f_fstypename[MFSTYPENAMELEN]; /* fs type name */
char f_mntonname[MAXPATHLEN]; /* directory on which mounted */
char f_mntfromname[MAXPATHLEN]; /* mounted filesystem */
uint32_t f_reserved[8]; /* For future use */
};
#endif
if (-1 == statfs (path, &statfs_buf)) {
perror("statfs() error");
} else {
int i;
char *fs_name = "Unknown";
for (i=0; i < sizeof (fs_type_names) / sizeof (fs_type_names[0]); i++) {
if (fs_type_names[i].f_fsid == (statfs_buf.f_type & fs_type_names[i].f_mask)) {
fs_name = fs_type_names[i].f_fsname;
break;
}
}
printf ("statfs() returned the following information\n");
printf ("about file system of path (%s):\n", path);
printf(" f_type : %s (%lx)\n", fs_name, statfs_buf.f_type);
printf(" f_bsize : %ld\n", statfs_buf.f_frsize);
printf(" f_blocks : %ld\n", statfs_buf.f_blocks);
printf(" f_bfree : %ld\n", statfs_buf.f_bfree);
printf(" f_bavail : %ld\n", statfs_buf.f_bavail);
printf(" f_files : %ld\n", statfs_buf.f_files);
printf(" f_ffree : %ld\n", statfs_buf.f_ffree);
#if !defined(__APPLE__)
printf(" f_namelen : %ld\n", statfs_buf.f_namelen);
#endif
}
return 0;
}
