请教一个关于在嵌入式平台上的boa webserver的问题

haohao_h

我在我的嵌入式平台上安装了一个boa服务器，能够跑起来，外界也能访问服务器指定的网页。但是当访问在boa.conf指定的cgi-bin目录下的cgi程序时，系统就死机了。我的cgi程序本身应该没有什么问题，通过串口直接在平台上是能跑起来的，如./mult.cgi在终端上能得到期望的输出。但是通过web页面来访问它的话，就会死机。我想应该是boa程序的问题。不知各位有没有遇到过这样的情况？我想跟一下boa的源码，但又找不到什么好的资料，希望有的提供一下！

firemoth

可能是你的boa.conf有问题。你把boa.conf帖出来看看。

firemoth

转贴：用BOA作为WEB SERVER编译流程说明

WEB SERVER 编译流程说明：

1. 用BOA作为WEB SERVER

\src\makefile下载见附件。

2. 按照"举例介绍uclinux应用程序的编译方法"的步骤编译。但是在第7小步，要修改inittab.conf

/etc> cat inittab

inet:unknown:/bin/inetd

boa:unknown:/bin/boa -c /home 加入这一行

并且把boa.conf 和mime.types文件修改并拷贝到/home目录

为了让boa简单的跑起来：

boa.conf修改方法，粗体字表示修改了

# Boa v0.94 configuration file

# File format has changed little from 0.92

# version changes are noted in the comments

#

# The Boa configuration file is parsed with a lex/yacc or flex/bison

# generated parser. If it reports an error, the line number will be

# provided; it should be easy to spot. The syntax of each of these

# rules is very simple, and they can occur in any order. Where possible

# these directives mimic those of NCSA httpd 1.3; I saw no reason to

# introduce gratuitous differences.

# The "ServerRoot" is not in this configuration file. It can be compiled

# into the server (see defines.h) or specified on the command line with

# the -c option, for example:

#

# boa -c /usr/local/boa

# Port: The port Boa runs on. The default port for http servers is 80.

# If it is less than 1024, the server must be started as root.

Port 80

# User: The name or UID the server should run as.

# Group: The group name or GID the server should run as.

User 0
# nobody

Group 0
# nogroup

# ServerAdmin: The email address where server problems should be sent.

# Note: this is not currently used.

#ServerAdmin root@localhost

# ErrorLog: The location of the error log file. If this does not start

# with /, it is considered relative to the server root.

# Set to /dev/null if you don't want errors logged.

#ErrorLog /home/error_log

#/var/log/boa/error_log

#ErrorLog /dev/null

# AccessLog: The location of the access log file. If this does not

# start with /, it is considered relative to the server root.

# Comment out or set to /dev/null (less effective) to disable

# Access logging.

#AccessLog /var/log/boa/access_log

#AccessLog /dev/null

# RefererLog: The location of the referer log file. If this does not

# start with /, it is considered relative to the server root.

# Comment out or set to /dev/null (less effective) to disable

# referer logging.

#RefererLog /var/log/boa/referer_log

#RefererLog /dev/null

# AgentLog: The location of the agent log file. If this does not

# start with /, it is considered relative to the server root.

# Comment out or set to /dev/null (less effective) to disable

# User-Agent logging.

#AgentLog /dev/null

#AgentLog /var/log/boa/agent_log

# VerboseCGILogs: this is just a logical switch.

# Comment out to disable.

#VerboseCGILogs

# ServerName: the name of this server that should be sent back to

# clients if different than that returned by gethostname -- often

# this is www.foo.bar.

#ServerName www.your.org.here

# DocumentRoot: The root directory of the HTML documents.

#DocumentRoot /var/www

DocumentRoot /home/httpd

# ChRoot: Boa root '/' directory. This is useful to improve security of

# your system. Don't forget that ALL DIRECTORIES used by boa except logs

# must be in this directory. If you need cgi scripts, you must copy shared

# libraries to this directory (see ldconfig(8) for more info)

#Chroot /var

# UserDir: The name of the directory which is appended onto a user's home

# directory if a ~user request is recieved.

UserDir public_html

# DirectoryIndex: Name of the file to use as a pre-written HTML

# directory index. Please MAKE AND USE THESE FILES. On the

# fly creation of directory indexes can be _slow_.

#

DirectoryIndex index.html

DirectoryMaker /usr/local/sbin/boa_indexer

# LocalCodepage: Local codepage. This is send to client in 'Content-Type:'

# header by default.

#LocalCodepage iso-8859-1

# Codepage: Load codepage conversion table from file. This table will be used

# on-the-fly conversion.

#Codepage us-ascii /usr/lib/boa/iso-8859-2/us-ascii

# CodepageByURL: Specify URL prefix codepage. This command is used for manual

# codepage selection. For example, http://www.cz.boa.org/asc/document.html

# converts /document.html to us-ascii

#CodepageByURL /asc us-ascii

# CodepageByBrowser: Specify codepage by $USER_AGENT. This command is used for

# automatic codepage selection. You can use characters '*' and '?' in browser

# string. For example, "CodepageByBrowser Lynx/* us-ascii" will send for Lynx

# users all documents in us-ascii.

#CodepageByBrowser Lynx/* us-ascii

# KeepAliveMax: Number of KeepAlive requests to allow per connection

# Comment out, or set to 0 to disable keepalive processing

KeepAliveMax 100

# KeepAliveTimeout: seconds to wait before keepalive connection times out

KeepAliveTimeout 10

# MimeTypes: This is the file that is used to generate mime type pairs

# and Content-Type fields for boa.

#MimeTypes /etc/mime.types

MimeTypes /home/mime.types

# DefaultType: MIME type used if the file extension is unknown, or there

# is no file extension.

DefaultType text/plain

# AddType: adds types without editing mime.types

# Example: AddType type extension [extension ...]

# Uncomment the next line if you want .cgi files to execute from anywhere

#AddType application/x-httpd-cgi cgi

# Redirect, Alias, and ScriptAlias all have the same semantics -- they

# match the beginning of a request and take appropriate action. Use

# Redirect for other servers, Alias for the same server, and ScriptAlias

# to enable directories for script execution.

# Redirect allows you to tell clients about documents which used to exist in

# your server's namespace, but do not anymore. This allows you to tell the

# clients where to look for the relocated document.

# Example: Redirect /bar http://elsewhere/feh/bar

# Aliases: Aliases one path to another.

# Example: Alias /path1/bar /path2/foo

#Alias /doc /usr/doc

# ScriptAlias: Maps a virtual path to a directory for serving scripts

# Example: ScriptAlias /htbin/ /www/htbin/

ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/

# VirtualHost: Maps a virtual host to a directory.

# Example: VirtualHost cz.boa.org /html/htdocs/boa/

#VirtualHost www.second.company.com /var/www/second_company/

# Auth: HTTP Basic authorization. Format is "Auth <Directory> <asswdFile>".

# Password file should be readable _ONLY_ by root or trusted user(s). This file

# is opened before boa gives out privs.

# Example: Auth /secret /var/www/secret.passwd

#Auth /internal /etc/internal.passwd

mime.types文件不改

把主页index.html放在/home/httpd/目录中

3. 完成接下来的几步

4. 启动uclinux, 就可以用IE访问http://192.168.0.3/了。

深入研究需要学习cgi 程序，可以用 web进行控制和显示。

http://www.jmarshall.com/easy/cgi/

haohao_h

boa.conf文件如下：boa是能跑的，只是在web上调cgi程序就死机。在pc的linux平台上也是没问题的。只是到了嵌入式平台就死机了。

1. # Boa v0.94 configuration file
   
2. # File format has changed little from 0.92
   
3. # version changes are noted in the comments
   
4. #
   
5. # The Boa configuration file is parsed with a lex/yacc or flex/bison
   
6. # generated parser.  If it reports an error, the line number will be
   
7. # provided; it should be easy to spot.  The syntax of each of these
   
8. # rules is very simple, and they can occur in any order.  Where possible
   
9. # these directives mimic those of NCSA httpd 1.3; I saw no reason to
   
10. # introduce gratuitous differences.
    
11. 
    
12. # The "ServerRoot" is not in this configuration file.  It can be compiled
    
13. # into the server (see defines.h) or specified on the command line with
    
14. # the -c option, for example:
    
15. #
    
16. # boa -c /usr
    
17. 
    
18. 
    
19. # Port: The port Boa runs on.  The default port for http servers is 80.
    
20. # If it is less than 1024, the server must be started as root.
    
21. 
    
22. Port 80
    
23. 
    
24. #  User: The name or UID the server should run as.
    
25. # Group: The group name or GID the server should run as.
    
26. 
    
27. User root
    
28. Group root
    
29. 
    
30. # ServerAdmin: The email address where server problems should be sent.
    
31. # Note: this is not currently used.
    
32. 
    
33. #ServerAdmin root@localhost
    
34. 
    
35. # ErrorLog: The location of the error log file. If this does not start
    
36. # with /, it is considered relative to the server root.
    
37. # Set to /dev/null if you don't want errors logged.
    
38. 
    
39. #ErrorLog /var/log/boa/error_log
    
40. 
    
41. # AccessLog: The location of the access log file. If this does not
    
42. # start with /, it is considered relative to the server root.
    
43. # Comment out or set to /dev/null (less effective) to disable
    
44. # Access logging.
    
45. 
    
46. #AccessLog /var/log/boa/access_log
    
47. 
    
48. # RefererLog: The location of the referer log file. If this does not
    
49. # start with /, it is considered relative to the server root.
    
50. # Comment out or set to /dev/null (less effective) to disable
    
51. # referer logging.
    
52. 
    
53. #RefererLog /var/log/boa/referer_log
    
54. 
    
55. # AgentLog: The location of the agent log file. If this does not
    
56. # start with /, it is considered relative to the server root.
    
57. # Comment out or set to /dev/null (less effective) to disable
    
58. # User-Agent logging.
    
59. 
    
60. #AgentLog /var/log/boa/agent_log
    
61. 
    
62. # VerboseCGILogs: this is just a logical switch.
    
63. # Comment out to disable.
    
64. 
    
65. #VerboseCGILogs
    
66. 
    
67. # ServerName: the name of this server that should be sent back to
    
68. # clients if different than that returned by gethostname -- often
    
69. # this is www.foo.bar.
    
70. 
    
71. #ServerName www.LG-blackfin.com
    
72. 
    
73. # DocumentRoot: The root directory of the HTML documents.
    
74. 
    
75. DocumentRoot /home/httpd
    
76. 
    
77. # ChRoot: Boa root '/' directory. This is useful to improve security of
    
78. # your system. Don't forget that ALL DIRECTORIES used by boa except logs
    
79. # must be in this directory. If you need cgi scripts, you must copy shared
    
80. # libraries to this directory (see ldconfig(8) for more info)
    
81. 
    
82. #Chroot /var
    
83. 
    
84. # UserDir: The name of the directory which is appended onto a user's home
    
85. # directory if a ~user request is recieved.
    
86. 
    
87. UserDir public_html
    
88. 
    
89. # DirectoryIndex: Name of the file to use as a pre-written HTML
    
90. # directory index.  Please MAKE AND USE THESE FILES.  On the
    
91. # fly creation of directory indexes can be _slow_.
    
92. #
    
93. 
    
94. DirectoryIndex index.html
    
95. 
    
96. #DirectoryMaker /usr/boa_indexer
    
97. 
    
98. # LocalCodepage: Local codepage. This is send to client in 'Content-Type:'
    
99. # header by default.
    
100. 
     
101. #LocalCodepage iso-8859-1
     
102. 
     
103. # Codepage: Load codepage conversion table from file. This table will be used
     
104. # on-the-fly conversion.
     
105. 
     
106. #Codepage us-ascii /usr/lib/boa/iso-8859-2/us-ascii
     
107. 
     
108. # CodepageByURL: Specify URL prefix codepage. This command is used for manual
     
109. # codepage selection. For example, http://www.cz.boa.org/asc/document.html
     
110. # converts /document.html to us-ascii
     
111. 
     
112. #CodepageByURL        /asc        us-ascii
     
113. 
     
114. # CodepageByBrowser: Specify codepage by $USER_AGENT. This command is used for
     
115. # automatic codepage selection. You can use characters '*' and '?' in browser
     
116. # string. For example, "CodepageByBrowser Lynx/* us-ascii" will send for Lynx
     
117. # users all documents in us-ascii.
     
118. 
     
119. #CodepageByBrowser Lynx/* us-ascii
     
120. 
     
121. # KeepAliveMax: Number of KeepAlive requests to allow per connection
     
122. # Comment out, or set to 0 to disable keepalive processing
     
123. 
     
124. KeepAliveMax 100
     
125. 
     
126. # KeepAliveTimeout: seconds to wait before keepalive connection times out
     
127. 
     
128. KeepAliveTimeout 20
     
129. 
     
130. # MimeTypes: This is the file that is used to generate mime type pairs
     
131. # and Content-Type fields for boa.
     
132. 
     
133. #MimeTypes /etc/mime.types
     
134. 
     
135. # DefaultType: MIME type used if the file extension is unknown, or there
     
136. # is no file extension.
     
137. 
     
138. DefaultType text/plain
     
139. 
     
140. # AddType: adds types without editing mime.types
     
141. # Example: AddType type extension [extension ...]
     
142. 
     
143. # Uncomment the next line if you want .cgi files to execute from anywhere
     
144. #AddType application/x-httpd-cgi cgi
     
145. 
     
146. # Redirect, Alias, and ScriptAlias all have the same semantics -- they
     
147. # match the beginning of a request and take appropriate action.  Use
     
148. # Redirect for other servers, Alias for the same server, and ScriptAlias
     
149. # to enable directories for script execution.
     
150. 
     
151. # Redirect allows you to tell clients about documents which used to exist in
     
152. # your server's namespace, but do not anymore. This allows you to tell the
     
153. # clients where to look for the relocated document.
     
154. # Example: Redirect /bar http://elsewhere/feh/bar
     
155. 
     
156. # Aliases: Aliases one path to another.
     
157. # Example: Alias /path1/bar /path2/foo
     
158. 
     
159. #Alias /doc /usr/doc
     
160. 
     
161. # ScriptAlias: Maps a virtual path to a directory for serving scripts
     
162. # Example: ScriptAlias /htbin/ /www/htbin/
     
163. 
     
164. #ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
     
165. ScriptAlias /cgi-bin/ /home/httpd/cgi-bin/
     
166. 
     
167. # VirtualHost: Maps a virtual host to a directory.
     
168. # Example: VirtualHost cz.boa.org /html/htdocs/boa/
     
169. 
     
170. #VirtualHost        www.second.company.com /var/www/second_company/
     
171. 
     
172. 
     
173. # Auth: HTTP Basic authorization. Format is "Auth <Directory> <PasswdFile>".
     
174. # Password file should be readable _ONLY_ by root or trusted user(s). This file
     
175. # is opened before boa gives out privs.
     
176. # Example: Auth /secret /var/www/secret.passwd
     
177. 
     
178. #Auth /etc /etc/passwd
     

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firemoth

可能是因为你把UID和GID设为根用户，你把它们设成0试试。

haohao_h

root和0有什么区别？
问题是同样的配置同样的目录结构，只是用不同的编译工具，不同的平台，就出现问题了。

haohao_h

访问cgi程序时出现这样的错误,一般情况下只是死机，这次报了错误再死机。

1. Data access misaligned address violation
   
2. - Attempted misaligned data memory or data cache access.
   
3. 
   
4. 
   
5. Exception: IRQ 0x5 entered
   
6. code=[0x0000c024],   stack frame=0x179bf28,   bad PC=0x14a675a
   
7. 
   
8. ----------- HARDWARE ERROR -----------
   
9. 
   
10. External Memory Addressing Error
    
11. 
    
12. CURRENT PROCESS:
    
13. 
    
14. COMM=boa PID=23
    
15. TEXT=01480044-01491c44 DATA=01491c48-014a6a98 BSS=014a6a98-014a6a98
    
16. USER-STACK=014bff8c
    
17. 
    
18. PC: 014a675a
    
19. RETE:  f41cff1e  RETN: bfca8b8c  RETX: 014a675a  RETS: 014bfc38
    
20. IPEND: ffffffd1  SYSCFG: 0032
    
21. SEQSTAT: 0000c024    SP: 0179bf28
    
22. R0: ffffffd1    R1: 017fa480    R2: 00000800    R3: 00000000
    
23. R4: 014180c8    R5: 014188ca    R6: ffffffe0    R7: 014189e0
    
24. P0: 00000000    P1: 00000003    P2: 01491cd4    P3: 00000116
    
25. P4: 01418000    P5: 01418000    FP: 014bfe94
    
26. A0.w: 8a88b63e    A0.x: fffffff8    A1.w: 80001a10    A1.x: ffffffee
    
27. LB0: 01490b3b  LT0: 01490b22  LC0: 00000000
    
28. LB1: 00000001  LT1: b672a264  LC1: 00000000
    
29. B0: 881c6c5f  L0: 00000000  M0: 02c06c1e  I0: 0179800b
    
30. B1: d62df8be  L1: 00000000  M1: 3d0035ff  I1: 003b5700
    
31. B2: 7755eb31  L2: 00000000  M2: 43753993  I2: 000ee0c4
    
32. B3: def26b0a  L3: 00000000  M3: 69d45dbf  I3: 9be5fcce
    
33. 
    
34. USP: 00000005   ASTAT: 02000002
    
35. 
    
36. 
    
37. Kernel panic: Unhandled IRQ or exceptions!

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firemoth

我也是用的boa，版本是0.94，从来没有出现过这样的问题。我用的是uclinux2.4的内核。

kj501

> Data access misaligned address violation - Attempted misaligned data memory or data cache access.
这原因看起来好象是访问的内存地址没有对齐造成的。

haohao_h

请问会是什么原因造成Data access misaligned address violation 呢？