slackware 普通用户不能访问mount的分区
这是我的fstab的内容：
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| /dev/hdc2 swap swap defaults 0 0
/dev/hdc1 / reiserfs defaults 1 1
/dev/hdc4 /usr reiserfs defaults 1 2
/dev/hdc5 /var reiserfs defaults 1 2
/dev/hdc6 /opt reiserfs defaults 1 2
/dev/hdc7 /home reiserfs defaults 1 2
/dev/hda1 /hda1 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hda5 /hda2 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hda6 /hda3 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hda7 /hda4 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hdb1 /hdb1 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hdb5 /hdb2 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/hdb6 /hdb3 ntfs ro , iocharset = gb2312 , umask = 022 1 0
/dev/cdrom /mnt/cdrom auto noauto , owner , ro 0 0
/dev/fd0 /mnt/floppy auto noauto , owner 0 0
devpts /dev/pts devpts gid = 5 , mode = 620 0 0
proc /proc proc defaults 0 0
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关键就是那个umask参数：
/dev/hda7 /hda4 ntfs ro,iocharset=gb2312,umask=022 1 0
这样mount之后，/hda4的权限就是drwxr-xr-x(即755)，普通用户也能访问了。同理，如果umask=000，权限就变成drwxrwxrwx(即777)，任何人都可以为所欲为了