我的 Pi3 上连接了一个 USB 驱动器，它带有 vfat 文件系统。我已将其安装在 fstab 中并分配了 uid 和 gid。我正在使用 pfoftpd 来允许存储文件并允许创建目录。我有几个用户，如 user1、user2 等。我可以通过 ssh 登录并与其中任何用户一起创建目录。但是，使用 ftp 时，我只能使用我在 fstab 中设置为 uid 的用户创建目录。gid 似乎没有什么区别，没有其他用户可以在此 vfat usb 上创建目录。有没有办法让整个组都能够创建目录，但出于某种原因，他们都可以将文件上传到该目录。
这是我的 fs 标签：
proc /proc proc defaults 0 0
/dev/mmcblk0p6 /boot vfat defaults 0 2
/dev/mmcblk0p7 / ext4 defaults,noatime 0 1
# a swapfile is not a swap partition, no line here
# use dphys-swapfile swap[on|off] for that
/dev/sda1 /media/usbhdd vfat auto,nofail,noatime,users,umask=000,uid=camera,gid=ftpusb 0 0
以下是与我相关的用户：
proftpd:x:112:65534::/run/proftpd:/bin/false
ftp:x:113:65534::/srv/ftp:/bin/false
amcrest:x:1001:1001:,,,:/home/amcrest:/bin/bash
userftp:x:1002:1002::/home/FTP-shared:/bin/false
camera:x:1003:1003::/media/usbhdd/cam1:/bin/bash
cam1:x:1004:1005:cam1,,,:/media/usbhdd/cam1:/bin/bash
dnsmasq:x:114:65534:dnsmasq,,,:/var/lib/misc:/bin/false
这是我对 USB 驱动器的权限：
drwxrwxrwx 2 camera ftpusb 16384 Dec 16 2015 System Volume Information
drwxrwxrwx 2 camera ftpusb 16384 Oct 21 09:14 test1
drwxrwxrwx 2 camera ftpusb 16384 Oct 27 06:45 test2
drwxrwxrwx 2 camera ftpusb 16384 Oct 27 08:33 test3
drwxrwxrwx 2 camera ftpusb 16384 Nov 7 08:56 test4
这是我的 proftp conf 文件：
#
# /etc/proftpd/proftpd.conf -- This is a basic ProFTPD configuration file.
# To really apply changes, reload proftpd after modifications, if
# it runs in daemon mode. It is not required in inetd/xinetd mode.
#
# Includes DSO modules
Include /etc/proftpd/modules.conf
# Set off to disable IPv6 support which is annoying on IPv4 only boxes.
UseIPv6 off # !!!!!!!!!!!!!1I changed to off
# If set on you can experience a longer connection delay in many cases.
IdentLookups off
ServerName "Debian"
ServerType standalone
DeferWelcome off
MultilineRFC2228 on
DefaultServer on
ShowSymlinks on
TimeoutNoTransfer 600
TimeoutStalled 600
TimeoutIdle 1200
DisplayLogin welcome.msg
DisplayChdir .message true
ListOptions "-l"
DenyFilter \*.*/
# Use this to jail all users in their homes
# DefaultRoot ~
# Users require a valid shell listed in /etc/shells to login.
# Use this directive to release that constrain.
# RequireValidShell off
# Port 21 is the standard FTP port.
Port 21
# In some cases you have to specify passive ports range to by-pass
# firewall limitations. Ephemeral ports can be used for that, but
# feel free to use a more narrow range.
# PassivePorts 49152 65534
# If your host was NATted, this option is useful in order to
# allow passive tranfers to work. You have to use your public
# address and opening the passive ports used on your firewall as well.
# MasqueradeAddress 1.2.3.4
# This is useful for masquerading address with dynamic IPs:
# refresh any configured MasqueradeAddress directives every 8 hours
<IfModule mod_dynmasq.c>
# DynMasqRefresh 28800
</IfModule>
# To prevent DoS attacks, set the maximum number of child processes
# to 30. If you need to allow more than 30 concurrent connections
# at once, simply increase this value. Note that this ONLY works
# in standalone mode, in inetd mode you should use an inetd server
# that allows you to limit maximum number of processes per service
# (such as xinetd)
MaxInstances 30
# Set the user and group that the server normally runs at.
User proftpd
Group nogroup
# Umask 022 is a good standard umask to prevent new files and dirs
# (second parm) from being group and world writable.
#Umask 022 022 #!!!!!!!!!!!!!!I got rid of this to see if it would work for group
# Normally, we want files to be overwriteable.
AllowOverwrite on
# Uncomment this if you are using NIS or LDAP via NSS to retrieve passwords:
# PersistentPasswd off
# This is required to use both PAM-based authentication and local passwords
# AuthOrder mod_auth_pam.c* mod_auth_unix.c
# Be warned: use of this directive impacts CPU average load!
# Uncomment this if you like to see progress and transfer rate with ftpwho
# in downloads. That is not needed for uploads rates.
#
# UseSendFile off
TransferLog /var/log/proftpd/xferlog
SystemLog /var/log/proftpd/proftpd.log
ExtendedLog /var/log/proftpd/extendlog.log
# Logging onto /var/log/lastlog is enabled but set to off by default
#UseLastlog on
# In order to keep log file dates consistent after chroot, use timezone info
# from /etc/localtime. If this is not set, and proftpd is configured to
# chroot (e.g. DefaultRoot or <Anonymous>), it will use the non-daylight
# savings timezone regardless of whether DST is in effect.
#SetEnv TZ :/etc/localtime
<IfModule mod_quotatab.c>
QuotaEngine off
</IfModule>
<IfModule mod_ratio.c>
Ratios off
</IfModule>
# Delay engine reduces impact of the so-called Timing Attack described in
# http://www.securityfocus.com/bid/11430/discuss
# It is on by default.
<IfModule mod_delay.c>
DelayEngine on
</IfModule>
<IfModule mod_ctrls.c>
ControlsEngine off
ControlsMaxClients 2
ControlsLog /var/log/proftpd/controls.log
ControlsInterval 5
ControlsSocket /var/run/proftpd/proftpd.sock
</IfModule>
<IfModule mod_ctrls_admin.c>
AdminControlsEngine off
</IfModule>
#
# Alternative authentication frameworks
#
#Include /etc/proftpd/ldap.conf
#Include /etc/proftpd/sql.conf
#
# This is used for FTPS connections
#
#Include /etc/proftpd/tls.conf
#
# Useful to keep VirtualHost/VirtualRoot directives separated
#
#Include /etc/proftpd/virtuals.conf
# A basic anonymous configuration, no upload directories.
# <Anonymous ~ftp>
# User ftp
# Group nogroup
# # We want clients to be able to login with "anonymous" as well as "ftp"
# UserAlias anonymous ftp
# # Cosmetic changes, all files belongs to ftp user
# DirFakeUser on ftp
# DirFakeGroup on ftp
#
# RequireValidShell off
#
# # Limit the maximum number of anonymous logins
# MaxClients 10
#
# # We want 'welcome.msg' displayed at login, and '.message' displayed
# # in each newly chdired directory.
# DisplayLogin welcome.msg
# DisplayChdir .message
#
# # Limit WRITE everywhere in the anonymous chroot
# <Directory *>
# <Limit WRITE>
# DenyAll
# </Limit>
# </Directory>
#
# # Uncomment this if you're brave.
# # <Directory incoming>
# # # Umask 022 is a good standard umask to prevent new files and dirs
# # # (second parm) from being group and world writable.
# # Umask 022 022
# # <Limit READ WRITE>
# # DenyAll
# # </Limit>
# # <Limit STOR>
# # AllowAll
# # </Limit>
# # </Directory>
<Directory /media/usbhdd>
Umask 000 000
AllowOverwrite on
<Limit READ>
DenyAll
</Limit>
<Limit STOR CWD MKD RMD DELE XRMD XMKD RETR>
AllowAll
</Limit>
<Limit WRITE>
AllowUser camera
AllowUser cam1
</Limit>
</Directory>
#
# </Anonymous>
# Include other custom configuration files
Include /etc/proftpd/conf.d/
DefaultRoot ~
AuthOrder mod_auth_file.c mod_auth_unix.c
AuthUserFile /etc/proftpd/ftpd.passwd
AuthPAM off
RequireValidShell off