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From Mike Price <mjpvirt...@yahoo.com>
Subject Re: Apache 2.0, CGI, and error 500
Date Sun, 17 Mar 2002 18:46:36 GMT
Ran strace on httpd, got this (sorry for the long
post):

24942 read(12, "GET /cgi-bin/shscript\r\n", 8192) = 18
24942 stat("/home/httpd/cgi-bin/shscript",
{st_mode=030172, st_size=0, ...}) = 0
24942 pipe([13, 14])                    = 0
24942 fcntl(14, F_GETFL)                = 0x1 (flags
O_WRONLY)
24942 fcntl(14, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
24942 pipe([15, 16])                    = 0
24942 fcntl(15, F_GETFL)                = 0 (flags
O_RDONLY)
24942 fcntl(15, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
24942 pipe([17, 18])                    = 0
24942 fcntl(17, F_GETFL)                = 0 (flags
O_RDONLY)
24942 fcntl(17, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
24942 fork()                            = 24955
24942 close(13)                         = 0
24942 close(16)                         = 0
24942 close(18)                         = 0
24942 close(14)                         = 0
24942 read(15, 0xbfffbb70, 1)           = -1 EAGAIN
(Resource temporarily unavai
lable)
24942 select(1024, [15], NULL, NULL, {300, 0}
<unfinished ...>
24955 getpid()                          = 24955
24955 close(6)                          = 0
24955 close(10)                         = 0
24955 close(7)                          = 0
24955 close(11)                         = 0
24955 unlink("/tmp/aprnP36ci")          = -1 ENOENT
(No such file or directory)
24955 close(-1)                         = -1 EBADF
(Bad file descriptor)
24955 --- SIGSEGV (Segmentation fault) ---
24955 chdir("/usr/local/apache2")       = 0
24955 SYS_174(0xb, 0xbfffb688, 0xbfffb5fc, 0x8, 0xb) =
0
24955 getpid()                          = 24955
24955 kill(24955, SIGSEGV)              = 0
24955 sigreturn()                       = ? (mask now
[])
24955 --- SIGSEGV (Segmentation fault) ---
24942 <... select resumed> )            = 1 (in [15],
left {300, 0})
24942 --- SIGCHLD (Child exited) ---

The st_mode of the file appears to be correct but the
read fails (EAGAIN). I'm stumped.


--- Artiom Morozov <artiom@phreaker.net> wrote:
> Ok, then i'd advise you to use strace(1) to attach
> to server children 
> and see what's going on. See man strace
> 
> On 2002.03.17 13:31 Mike Price wrote:
> > LogLevel IS at debug and ScriptLog IS set. The
> > log file appears:
> > 
> > %% [Sun Mar 17 03:19:06 2002] GET
> /cgi-bin/shscript
> > HTTP/1.0
> > %% 500 /home/httpd/cgi-bin/shscript
> > %request
> > Referer: http://www.---.com/Home.html
> > Connection: Keep-Alive
> > User-Agent: Mozilla/4.79 [en] (WinNT; U)
> > Host: www.---.com
> > Accept: image/gif, image/x-xbitmap, image/jpeg,
> > image/pjpeg, image/png, */*
> > Accept-Encoding: gzip
> > Accept-Language: en
> > Accept-Charset: iso-8859-1,*,utf-8
> > Extension: Security/Remote-Passphrase
> > %response
> > 
> > Note that nothing follows the %response line - the
> > script appears not to produce any output. If I run
> > the script as the server user, it works fine. The
> > script file is NOT being accessed (as reported by
> ls
> > -lu).
> > 
> > --- Artiom Morozov <artiom@phreaker.net> wrote:
> > > Ok, you're at the final stage - set LogLevel to
> > > debug and enable
> > > ScriptLog (beware of permissions for scriptlog!
> =).
> > > There then will
> > > your answer be (excuse my english ;-)
> > >
> > > On 2002.03.17 13:17 Mike Price wrote:
> > > > I checked httpd -l and it's using mod_cgi.
> > > >
> > > > --- Artiom Morozov <artiom@phreaker.net>
> wrote:
> > > > > probably you compiled mod_cgid instead of
> > > mod_cgi
> > > > >
> > > > > ξΑ 2002.03.17 12:57 Mike Price ΞΑΠΙΣΑΜ:
> > > > > > I am unable to get CGI programs to work
> under
> > > > > > Apache 2.0.32. All of these programs work
> > > under
> > > > > > Apache 1.3.23. Under 2.0.32 they all
> produce
> > > error
> > > > > > "500 Premature end of script headers". The
> > > > > ScriptLog
> > > > > > output shows nothing following the
> %response
> > > line
> > > > > -
> > > > > > the scripts produce no output at all. An
> "ls
> > > -lu"
> > > > > > shows
> > > > > > that the script files are NOT being
> accessed.
> > > The
> > > > > > error log shows the correct file name for
> the
> > > > > script -
> > > > > > it's as though Apache cannot execute the
> file.
> > > > > > Permissions are 755 on the scripts and 711
> on
> > > the
> > > > > > directory. User/group is consistent on
> both
> > > and
> > > > > > different from the server user/group.
> > > ScriptAlias
> > > > > > points to the directory.
> > >
> > >
> > >
> >
>
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> > > The official User-To-User support forum of the
> > > Apache HTTP Server Project.
> 
>
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