On Sat, Aug 11, 2018 at 11:45:14PM +0200, Toru Okada wrote:
> Now:
> 
> #!/usr/bin/perl
> 
> print("Content-Type: text/html; charset=ascii\r\n\r\n");
> print("a"); # works
> # no error but not found in file system after the script finished

> open(my $fh, ">", "/var/www/foo/out");

What about changing:

> open(my $fh, ">", "/var/www/foo/out");

to:

open(my $fh, ">", "/foo/out");

assuming the slowcgi chroot is /var/www of course.

> print($fh "foo");
> close($fh);
> print("b");
> 
> "foo" is writable by all:
> 
> # ls -l /var/www/
> total 40
> drwxr-xr-x  2 root  daemon  512 Apr  1  2017 acme
> drwxr-xr-x  2 root  daemon  512 Apr  1  2017 bin
> drwx-----T  2 www   daemon  512 Apr  1  2017 cache
> drwxr-xr-x  2 root  daemon  512 Aug  9 17:56 cgi-bin
> drwxr-xr-x  2 root  daemon  512 Aug 28  2017 conf
> drwxrwxrwx  2 root  daemon  512 Aug  9 17:34 foo
> drwxr-xr-x  4 root  daemon  512 Apr 15 04:26 htdocs
> drwxr-xr-x  2 root  daemon  512 Jul  1 00:00 logs
> drwxr-xr-x  2 root  daemon  512 Aug  9 19:39 run
> drwxr-xr-x  5 root  daemon  512 Apr 15 11:17 usr
> 
> # chroot -u www /var/www/ cgi-bin/test.pl
> Content-Type: text/html; charset=ascii
> 
> ab#
> 
> # ls -l /var/www/cgi-bin/test.pl
> -rwxrwxrwx  1 755  www  244 Aug  9 19:32 /var/www/cgi-bin/test.pl
> 
> # slowcgi -d
> slowcgi: socket: /var/www/run/slowcgi.sock
> slowcgi: slowcgi_user: www
> slowcgi: chroot: /var/www
> slowcgi: inflight incremented, now 1
> slowcgi: version:         1
> slowcgi: type:            1
> slowcgi: requestId:       1
> slowcgi: contentLength:   8
> slowcgi: paddingLength:   0
> slowcgi: reserved:        0
> slowcgi: role             1
> slowcgi: flags            0
> slowcgi: version:         1
> slowcgi: type:            4
> slowcgi: requestId:       1
> slowcgi: contentLength:   808
> slowcgi: paddingLength:   0
> slowcgi: reserved:        0
> slowcgi: env[0], PATH_INFO=
> slowcgi: env[1], SCRIPT_NAME=/cgi-bin/test.pl
> slowcgi: env[2], SCRIPT_FILENAME=//cgi-bin/test.pl
> slowcgi: env[3], QUERY_STRING=
> slowcgi: env[4], DOCUMENT_ROOT=/
> slowcgi: env[5], DOCUMENT_URI=/cgi-bin/test.pl
> slowcgi: env[6], GATEWAY_INTERFACE=CGI/1.1
> slowcgi: env[7], 
> HTTP_ACCEPT=text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
> slowcgi: env[8], HTTP_ACCEPT_ENCODING=gzip, deflate
> slowcgi: env[9], HTTP_ACCEPT_LANGUAGE=de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7
> slowcgi: env[10], HTTP_CACHE_CONTROL=max-age=0
> slowcgi: env[11], HTTP_CONNECTION=keep-alive
> slowcgi: env[12], HTTP_HOST=192.168.178.43
> slowcgi: env[13], HTTP_UPGRADE_INSECURE_REQUESTS=1
> slowcgi: env[14], HTTP_USER_AGENT=Mozilla/5.0 (Windows NT 10.0; Win64; x64) 
> AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
> slowcgi: env[15], REMOTE_ADDR=192.168.178.29
> slowcgi: env[16], REMOTE_PORT=56472
> slowcgi: env[17], REQUEST_METHOD=GET
> slowcgi: env[18], REQUEST_URI=/cgi-bin/test.pl
> slowcgi: env[19], SERVER_ADDR=192.168.178.43
> slowcgi: env[20], SERVER_PORT=80
> slowcgi: env[21], SERVER_NAME=127.0.0.1
> slowcgi: env[22], SERVER_PROTOCOL=HTTP/1.1
> slowcgi: env[23], SERVER_SOFTWARE=OpenBSD httpd
> slowcgi: version:         1
> slowcgi: type:            4
> slowcgi: requestId:       1
> slowcgi: contentLength:   0
> slowcgi: paddingLength:   0
> slowcgi: reserved:        0
> slowcgi: fork: //cgi-bin/test.pl
> slowcgi: version:         1
> slowcgi: type:            5
> slowcgi: requestId:       1
> slowcgi: contentLength:   0
> slowcgi: paddingLength:   0
> slowcgi: reserved:        0
> slowcgi: resp version:         1
> slowcgi: resp type:            6
> slowcgi: resp requestId:       1
> slowcgi: resp contentLength:   44
> slowcgi: resp paddingLength:   4
> slowcgi: resp reserved:        0
> slowcgi: wait: //cgi-bin/test.pl
> slowcgi: resp version:         1
> slowcgi: resp type:            6
> slowcgi: resp requestId:       1
> slowcgi: resp contentLength:   0
> slowcgi: resp paddingLength:   0
> slowcgi: resp reserved:        0
> slowcgi: resp version:         1
> slowcgi: resp type:            7
> slowcgi: resp requestId:       1
> slowcgi: resp contentLength:   0
> slowcgi: resp paddingLength:   0
> slowcgi: resp reserved:        0
> slowcgi: resp version:         1
> slowcgi: resp type:            3
> slowcgi: resp requestId:       1
> slowcgi: resp contentLength:   8
> slowcgi: resp paddingLength:   0
> slowcgi: resp reserved:        0
> slowcgi: resp appStatus:       0
> slowcgi: resp protocolStatus:  0
> 
> # httpd -d -vv
> socket_rlimit: max open files 1024
> startup
> server_privinit: adding server 127.0.0.1
> socket_rlimit: max open files 1024
> socket_rlimit: max open files 1024
> server_launch: configuring server 127.0.0.1
> server_launch: running server 127.0.0.1
> server_launch: configuring server 127.0.0.1
> server_launch: running server 127.0.0.1
> server_launch: configuring server 127.0.0.1
> server_launch: running server 127.0.0.1
> 127.0.0.1 192.168.178.29 - - [09/Aug/2018:19:39:13 +0200] "GET 
> /cgi-bin/test.pl HTTP/1.1" 200 0
> 
> # cat /etc/httpd.conf
> server "127.0.0.1" {
>         listen on * port 80
>         location "/cgi-bin/*" {
>                 fastcgi
>                 root "/"
>         }
> }
> 
> # ls -l /var/www/usr/bin/
> total 20
> -rwxr-xr-x  1 root  daemon  9296 Apr 15 11:19 perl
> 
> # ls -l /var/www/usr/lib/
> total 15576
> -r--r--r--  1 root  daemon  2862990 Apr 15 11:19 libc.so.89.3
> -r--r--r--  1 root  daemon   463356 Apr 15 11:19 libm.so.10.0
> -r--r--r--  1 root  daemon  4293077 Apr 15 11:20 libperl.so.18.0
> -r--r--r--  1 root  daemon   146552 Apr 15 11:20 libpthread.so.23.0
> -r--r--r--  1 root  daemon   125877 Apr 15 11:20 libutil.so.12.1
> 
> # ls -l /var/www/usr/libexec/
> total 372
> -r--r--r--  1 root  daemon  189764 Apr 15 11:21 ld.so
> 
> Still no error but no written file as well.
> 
> Am 11.08.2018 um 21:13 schrieb Hiltjo Posthuma:
> > On Sat, Aug 11, 2018 at 07:58:02PM +0200, Toru Okada wrote:
> >> Hi:
> >>
> >> I want to write a file out from within a perl cgi script. This is 
> >> obviously not possible in the standard configuration of httpd. The normal 
> >> output works perfectly. What is to do?
> >>
> >> #!/usr/bin/perl
> >>
> >> print("Content-Type: text/html; charset=ascii\n\n");
> > 
> > Unrelated but the line-endings should be "\r\n" for these headers.
> > https://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2
> > 
> >> print("hello world"); # works
> >> # no error but not found in file system after the script finished
> >> open(my $fh, ">", "out") or die $!;   
> > 
> > Maybe some permission/work directory issue? Try writing to an absolute path.
> > slowcgi is chrooted by default, so maybe it tries to write to /var/www/out 
> > and
> > it has no permissions for that?
> > 
> > Running httpd -d -vv and slowcgi -d can help to debug too.
> > 
> >> print($fh "foo");
> >> close($fh);
> >>
> >> OpenBSD 6.1
> >>
> >> Many thanks in advance.
> >>
> > 
> 

-- 
Kind regards,
Hiltjo

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