服务器评测
在嵌入式Linux系统中，有时候需要搭建一个ftp服务器，以便windows或linux系统去访问嵌入式linux系统的数据。现在流行的ftp和vsftpd软件相对比较大，在嵌入式Linux系统下不太合适。最近由于需要，发现了一款很小型的ftp服务器，在这里分享。
stupid-ftpd 下载地址：
免费下载地址在 http://linux.linuxidc.com/
用户名与密码都是www.linuxidc.com
具体下载目录在 /2012年资料/3月/16日/嵌入式Linux的FTP服务端软件(stupid-ftpd) /
根据自己的需要，修改Makefile，将gcc修改为交叉工具链的gcc，比如mips-gnu-linux-gcc。
若要静态编译，在CFLAGS后面添加”-static”选项。
以下的Makefile已经修改：
- #
- #
- # Makefile for the linux version of stupid-ftpd
- #
- #
- #
-
-
- CC=mips-linux-gnu-gcc -EL #修改
- OBJS=ftpcommand.o ftpdconfig.o command.o ls.o stupid-ftpd.o
- DOBJS=ftpcommand.do ftpdconfig.do command.do ls.do stupid-ftpd.do
- POBJS=ftpcommand.po ftpdconfig.po command.po ls.po stupid-ftpd.po
- LIBS=
- CFLAGS=-O2 -Wall -Wstrict-prototypes -static #修改
- DCFLAGS=-g -DDEBUG -Wall -Wstrict-prototypes
- PCFLAGS=-g -DDEBUG -Wall -Wstrict-prototypes -Wcast-align -Wwrite-strings -Wconversion -Waggregate-return -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs
- EXEC=stupid-ftpd.Linux6
-
- .SUFFIXES: .c .o .do .po
-
- all: $(OBJS)
- $(CC) $(CFLAGS) -o $(EXEC) $(OBJS) $(LIBS)
-
- debug: $(DOBJS)
- $(CC) $(DCFLAGS) -o $(EXEC) $(DOBJS) $(LIBS)
-
- pedantic: $(POBJS)
- $(CC) $(PCFLAGS) -o $(EXEC) $(POBJS) $(LIBS)
-
- clean:
- rm -f $(OBJS) $(DOBJS) $(POBJS) $(EXEC) *~
-
- .c.o:
- $(CC) $(CFLAGS) -c -o $@ $<
-
- .c.do:
- $(CC) $(DCFLAGS) -c -o $@ $<
-
- .c.po:
- $(CC) $(PCFLAGS) -c -o $@ $<
-
- install:
- install -m 755 -s ./stupid-ftpd /usr/local/bin/stupid-ftpd
- install -m 700 -d /etc/stupid-ftpd
- install -m 755 -d /usr/local/stupid-ftpd
- install -m 600 ./stupid-ftpd.conf /etc/stupid-ftpd/stupid-ftpd.conf
只需修改两个位置。
编译完成后，生成stupid-ftpd.Linux6可执行程序，该程序运行需要配置文件，以下的配置已经被修改并验证，是可以用的。但前提是运行在嵌入式Linux系统下，21端口没有被占用。
- #
- # This is a config-file for stupid-ftpd
- # ————————————
- #
- # The standard path should be /etc/stupid-ftpd.conf
- # You can define other paths by using the “-f” option
- # when starting stupid-ftpd.
- #
- #
- # ATTENTION: 1) Remember, that the server is running with YOUR permissions.
- # It will fail to access other users directory, unless it is
- # root, but it also allows to access ALL YOUR directories,
- # which are deeper in a user’s root-dir and YOU HAVE access to.
- # 2) To solve the problem, the best way is to define a group-ID
- # for stupid-ftpd.
- # Or if you aren’t root: set the MAIN root (serverroot=) to
- # the highest directory depth which is possible.
- # 3) REMEMBER: DO NOT PUT THIS FILE in an accessible directory!!!
- # There are passwords defined here. The safest place is
- # outside the serverroot.
- # Server operation mode:
- # daemon – quiet in background
- # interactive – standard mode
- #mode=interactive #交互式的形式运行
- mode=daemon #以守护进程的形式运行在后台
- # chroot to
- #serverroot=/usr/home/cinek/tmp3/aaa
- serverroot=/mnt #将ftp的根目录设置为/mnt目录下，在windows打开该ftp，就能访问/mnt目录
- # type of chroot
- # real – kernel chroot(), high security, but needs root privileges
- # virtual – no real chroot(), software side (virtual) chroot
- #changeroottype=real
- changeroottype=virtual
- # Port number for the FTP-Protocol
- #port=2121
- port=21 #默认为ftp的端口号。
- # Maximum users allowed to log in
- maxusers=10
- # Message Of The Day (motd)
- # It will be displayed after the login procedure.
- #motd=/tmp/stupid-ftpd.motd
- # Message on quit
- # It will be displayed when quitting.
- #byemsg=/tmp/stupid-ftpd.bye
- # Log
- #log=/tmp/stupid-ftpd.log
- # User list:
- # Format: user=<login> <passwd> <subdir> <maxlogins> <flags>
- # <login> user name
- # <passwd> password or * for anonymous access
- # <subdir> (internally appended to serverroot)
- # the user has access to the WHOLE SUBTREE,
- # if the server has access to it
- # <maxlogins> maximal logins with this usertype
- # <flags> D – download
- # U – upload + making directories
- # O – overwrite existing files
- # M – allows multiple logins
- # E – allows erase operations
- # A – allows EVERYTHING(!)
- #
- # user ftp is mapped to user anonymous, don’t forget this
- #
- # Examples:
- # user=user1 passx /tmp 2 D
- # – login: user1, passwd: passx, max login twice (different IPs!)
- # only download rights from directory /tmp
- # user=user2 passy /home/user2 0 DU
- # – login: user2, passwd: passy, no login count limit (different IPs!)
- # download+upload rights to directory /home/user2
- # user=user3 passz /home/user3 5 DUOM
- # – login: user3, passwd: passz, max login count 5 (even from same IP)
- # download+upload+overwrite rights to directory /home/user3
- # user=user4 passq /tmp 10 –
- # – login: user4, passwd: passq, max login count 10 (even from same IP)
- # look-only rights at directory /tmp
- #
- # SEE: ATTENTION remark on the top of this file !!!
- user=anonymous * / 5 A
- # Banned hosts
- # “*” and “?” are allowed here
- #ban=192.168.*
- #ban=localhost
- #ban=*.banme.com
- # Ban message (displayed to user who is banned)
- # Please don’t use more than 70 characters.
- #banmsg=Go away !
- # Login/password timeout
- login-timeout=120
- # Timeout (while logged in)
- timeout=240
剩下的用默认的配置就可以了，特别注意，设置port参数的时候，2121端口不能使用，无法提供ftp服务。要设置为21端口，经过测试，设置为21端口，在Linux的PC机，报错：21端口被占用。但在嵌入式Linux下，是可以使用的。
stupid-ftpd.Linux6的使用方法：
直接用-f选项指定配置文件：
stupid-ftpd.Linux6 -f stupid-ftpd.conf
然后保证windows与嵌入式Linux系统的IP地址在同一网段，然后再”我的电脑”输入：ftp://192.168.x.x/
这里就不截图了。
