[rrd-users] Re: --set-tz patch for rrdtool graph

[Tobias Oetiker]

Today Jason Fesler wrote:

 |
 | This patch will add a new argument to the "rrdtool graph" command
 | called "--set-tz".  It takes one argument - one of the form
 | PST8PDT or GMT, etc.   See "man environ" for how the TZ environment
 | variable works.
 |
 | This patch was created, since setting  $ENV{"TZ"} in perl and then
 | using RRDs.pm was not adequate to affect rrdtool's sense of local time.

can you elaborate on why it should make a differenze if you set the
TZ environemnt variable in perl or in a shared library loaded into
perl ...

confused
tobi

 |
 | Blame can be sent to jfesler at gigo.com ..
 |
 |
 | *** rrdtool-1.0.28/src/rrd_graph.c      Wed Sep 13 23:04:00 2000
 | --- rrdtool-1.0.28jf/src/rrd_graph.c    Sat Mar 10 10:31:14 2001
 | ***************
 | *** 2646,2651 ****
 | --- 2646,2658 ----
 |       return inp;
 |   }
 |
 | + void set_time_zone(char *s) {
 | +   char buf[256];
 | +   sprintf(buf,"TZ=%s",s);
 | +   putenv(buf);
 | + }
 | +
 | +
 |   int
 |   rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
 |   {
 | ***************
 | *** 2717,2722 ****
 | --- 2724,2730 ----
 |             {"alt-y-grid", no_argument,       0,   257 },
 |             {"alt-autoscale", no_argument,    0,   258 },
 |             {"alt-autoscale-max", no_argument,    0,   259 },
 | +           {"set-tz", required_argument,    0,   260 },
 |             {0,0,0,0}};
 |         int option_index = 0;
 |         int opt;
 | ***************
 | *** 2730,2735 ****
 | --- 2738,2747 ----
 |             break;
 |
 |         switch(opt) {
 | +       case 260:
 | +           /* "tz" */
 | +           set_time_zone(optarg);
 | +           break;
 |         case 257:
 |             im.extra_flags |= ALTYGRID;
 |             break;
 |
 |

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