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From Artiom Morozov <art...@phreaker.net>
Subject Re: Apache 2.0, CGI, and error 500
Date Mon, 18 Mar 2002 07:46:46 GMT
forked child crashes =( imo it's a bug in apache and you can post it 
somewhere on httpd.apache.org

On 2002.03.17 20:46 Mike Price wrote:
> 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
> > > > > >
> > > > > > îÁ 2002.03.17 12:57 Mike Price ÎÁÐÉÓÁÌ:
> > > > > > > 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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> >
> >
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> 
> 

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