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/*
* UAE - The Un*x Amiga Emulator
*
* Miscellaneous support for virtual filesystems on Unix.
*
* Copyright 2004 Richard Drummond
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "filesys.h"
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#if HAVE_SYS_MOUNT_H
# include <sys/mount.h>
#endif
#if HAVE_SYS_VFS_H
# include <sys/vfs.h>
#endif
#if HAVE_SYS_STATFS_H
# include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
# include <sys/statvfs.h>
#endif
/*
* Try to determine whether the host filesystem
* containing path is read-only - which, depending
* on the host OS - isn't as easy as you might
* think. ;-)
*
* Much more work to do here . . .
*/
int filesys_is_readonly (const char *path)
{
/* If we don't know, we'll claim it's read/write */
int readonly = 0;
#ifdef STAT_STATVFS
/* With a working statvfs() it's easy */
struct statvfs buf;
if (statvfs (path, &buf) == 0)
readonly = ((buf.f_flag & ST_RDONLY) == ST_RDONLY);
#else
# ifdef __linux__
# define ISOFS_SUPER_MAGIC 0x9660
/* statvfs() is broken in many glibc implementations
* so we don't use that. Instead, we'll be naive and
* use statfs() and decide based on the filesystem
* type. (We should be more clever and parse /etc/fstab
* and /etc/mtab, but this'll do for just now).
*/
struct statfs buf;
if (statfs (path, &buf) == 0) {
if (buf.f_type == ISOFS_SUPER_MAGIC)
readonly = 1;
}
# endif
#endif
return readonly;
}