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