Hello,
I want to update an RRD database inside a C program.
For that I use rrd_last() to check if the database already exists.
If it does I just uptade it with rrd_update().
If it doesn't I create it with rrd_create() and then update it with
rrd_update().
When I run the program the first time (the RRD database doesn't exists),
after the rrd_update() call, I get the error:
"ERROR: Not enough arguments"
The second time the problem doesn't accurs!
It just happens when I call rrd_create() followed by rrd_update().
Using pipes I don't get the problem.
-=-=-=-=-=-=-=-
Here is the output for the two consecutives runs:
[EMAIL PROTECTED] niacap]# ./a.out
COMMAND: last test.rrd
ERROR: opening 'test.rrd': No such file or directory <----- OK, IT
DOESN'T EXISTS
COMMAND: create --start 1000000000 test.rrd
DS:out:COUNTER:600:U:U
DS:in:COUNTER:600:U:U
RRA:AVERAGE:0.5:1:288
RRA:AVERAGE:0.5:6:326
COMMAND: update test.rrd 1000000001:1000:1000
ERROR: Not enough arguments <----- THE ERROR
[EMAIL PROTECTED] niacap]# ./a.out
COMMAND: last test.rrd <----- IT EXISTS
COMMAND: update test.rrd 1000000001:1000:1000 <----- NO ERROR
[EMAIL PROTECTED] niacap]#
-=-=-=-=-=-=-=-
Here is the code for this program that simulates the problem:
#include <stdio.h>
#include <string.h>
#include <rrd.h>
void r_erro (void)
{
if (rrd_test_error())
{
fprintf(stdout, "ERROR: %s\n", rrd_get_error());
rrd_clear_error();
}
}
unsigned int r_last (char *rrd_nome)
{
char *argv[2] = { "last", rrd_nome };
unsigned int t;
printf("COMMAND: %s %s\n", argv[0], argv[1]);
t = rrd_last(2, argv);
r_erro();
return ((int)t == -1) ? 0 : t;
}
int main (void)
{
int i;
unsigned int last;
char r_nome[50] = "test.rrd";
char r_update_temp[50];
char *r_update[3] = { "update", r_nome, r_update_temp };
char *r_create[8] =
{
"create", "--start", "1000000000", r_nome,
"DS:out:COUNTER:600:U:U",
"DS:in:COUNTER:600:U:U",
"RRA:AVERAGE:0.5:1:288",
"RRA:AVERAGE:0.5:6:326"
};
if ( !(last = r_last(r_nome)) )
{
printf("COMMAND: %s %s %s %s\n\t%s\n\t%s\n\t%s\n\t%s\n",
r_create[0], r_create[1], r_create[2], r_create[3],
r_create[4], r_create[5], r_create[6], r_create[7]);
rrd_create(8, r_create);
r_erro();
}
sprintf(r_update_temp, "%u:%u:%u", ++last, 1000, 1000);
printf("COMMAND: %s %s %s\n", r_update[0], r_update[1], r_update[2]);
rrd_update(3, r_update);
r_erro();
}
--
-chico
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