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
