[rrd-users] Re: Newbie: rddcgi graph

Tue Jan 22 22:29:58 MET 2002

The permission denied could be due to the permissions and/or ownership of
rrd.cgi. Find out what user runs apache (it is in the apache config file),
and what group it runs as. Then make the owner and group of rrd.cgi the same
as the owner and group of apache, and make the permissions on rrd.cgi 540
(chmod 540 rrd.cgi).

The script headers could be due to the fact that you don't have the
following header:
Content-type: test/html

or whatever it will generate. Here is an example of the start on one of my
cgi graphs (Mine is in C, but you should be able to follow it).

printf("Content-Type: text/html\n");
printf("Expires: %s, %02i %s %4i %02i:%02i:%02i
GMT\n",days[now.tm_wday],now.tm_mday,months[now.tm_mon],now.tm_year+1900,now
.tm_hour,now.tm_min,now.tm_sec);
printf("refresh: 305\n\n");
printf("<html><head>");
printf("<title>CRL Network Monitoring - Home Page.</title>");
printf("</head>");

-----Original Message-----
From: Johnny.LEON at us.socgen.com [mailto:Johnny.LEON at us.socgen.com]
Sent: Wednesday, 23 January 2002 6:48 AM
To: rrd-users ml
Subject: [rrd-users] Newbie: rddcgi graph

<snip>
rrd.cgi:

#!/usr/bin/rrdcgi

<HTML>
 <HEAD><TITLE>RRDCGI Demo</TITLE></HEAD>
 <BODY>
 <H1>RRDCGI Example Page</H1>
 <P>
 <RRD::GRAPH test.gif --imginfo '<IMG SRC="%s" WIDTH="%lu" HEIGHT="%lu" >'
-t
RWANDAL01_E0 -v bps
DEF:inoctets=rwandal.rrd:input:AVERAGE
DEF:outoctets=rwandal.rrd:output:AVERAGE
CDEF:inbps=inoctets,8,* CDEF:outbps=outoctets,8,* A$
LINE1:outbps#0000FF:"Out traffic">
 </P>
 </BODY>
 </HTML>

apache log:

[error] (13)Permission denied: exec of /home/web/cgis/test.gif failed
[error] [client 170.50.81.149] Premature end of script headers:
/home/web/cgis/test.gif
[error] (8)Exec format error: exec of /home/web/cgis/test.gif failed
[error] [client 170.50.81.149] Premature end of script headers:
/home/web/cgis/test.gif

Any help is appreciated. Thanks in advance.

Johnny H. Leon

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