exec does not work

[stoffel67]

Hi,
I try to do the following:
set cmd "rrdtool create c://rrdtool//Gas1.rrd --start 1360279400 --step 600 DS:AGas:GAUGE:900:U:U DSGas:GAUGE:900:U:U RRA:MAX:0.5:1:1008"
exec $cmd

this work's OK, the DB is created!
but within a procedure:
proc db_create {} {
set cmd "rrdtool create c://rrdtool//Gas1.rrd --start 1360279400 --step 600 DS:AGas:GAUGE:900:U:U DSGas:GAUGE:900:U:U RRA:MAX:0.5:1:1008"
exec $cmd
}
it does not work, I get an error:
couldn't execute "rrdtool create c:\rrdtool\Gas1.rrd --start 1360279400 --step 600 DS:AGas:GAUGE:900:U:U DSGas:GAUGE:900:U:U RRA:MAX:0.5:1:1008": no such file or directory

What am I doing wrong here????
Any help would be appreciated.
Thanks
Stef

 

[Bong]

Sometimes, scope is peculiar. Try, just to see what happens, building the command string outside the proc and passing it in as an argument.

_________________
Bob Rashkin

 

[stoffel67]

Hi Bob,
same effect!!

couldn't execute "rrdtool create c:\rrdtool\Gas1.rrd --start 1360279400 --step 600 DS:AGas:GAUGE:900:U:U DSGas:GAUGE:900:U:U RRA:MAX:0.5:1:1008": no such file or directory

without all the parameter to "rrdtool" the program is started.
the problem seems to be the parameter list.

 

[stoffel67]

Hi,
I think I got the solution from another TCL-forum:
eval exec did the trick.

proc db_create { cmd } {
eval exec $cmd
}

 

[Bong]

Usually, I think that means that some substitution needs to be made prior to "exec". I don't see what that would be but oh well.

_________________
Bob Rashkin