Is that for inspiration on 1. is there another way to do this
or 2. how do I do this with a c function? I assume #2 :-) Thanks > -----Original Message----- > From: Tobias Oetiker [mailto:[EMAIL PROTECTED] > Sent: Wednesday, February 13, 2008 4:17 AM > To: Jack Tavares > Cc: [email protected] > Subject: Re: [rrd-users] getting MAX, LAST VDEFs without > generating graph from C library > > Hi Jack, > > check out rrd_tool.c for inspiration > > cheers > tobi > > Today Jack Tavares wrote: > > > Hello all > > > > I have some existing rrdfile with some data in them. > > > > I was reading about the VDEF capabilities of the rrdgraph > > command. > > > > I am using the c library functions to manipulate the rrd files. > > > > I want the MAX and LAST from a graph, but I don't want the graph. > > > > At the command line I would do: > > > > rrdtool graph xy.png -aPNG > > DEF:curclientconns=/var/rrd/connections:curclientconns:AVERAGE > > VDEF:connsmax=curclientconns,MAXIMUM > VDEF:connslast=curclientconns,LAST > > PRINT:connslast:"last=%12.0lf" PRINT:connsmax:"max=%12.0lf" > > > > This prints to stdout. > > > > If I am calling rrd_graph() C function, how do I get this data? > > > > > > Is there a better way to do this? I m very open to > suggestions, but I > > have to stick with the C library calls. > > > > Ok, one more question: > > I dont see any API docs for theC library on the web site. > Are there any? > > > > Thanks again > > > > -- > > Jack Tavares > > Reminder: I am at GMT+2, 10 hours AHEAD of Seattle. > > My workweek is Sunday-Thursday. > > Email sent to me Thursday afternoon (PST) may not be viewed > until Sunday > > morning (GMT+2). > > > > > > > > -- > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten > http://it.oetiker.ch [EMAIL PROTECTED] ++41 62 213 9902 > _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
