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(Conky) How to not show "if_existing" if it's not exist

Hi all,

Im running on slackware 14.0.Im having some issue on conky. I use a few "if_existing" statement in the configuration file to display the network interface information if conky detect eth0/eth1/eth2/eth3.

The problem comes when the system only detect one interface. Conky display lots of blank space for the un-detected interface. (Assume it only display eth0 information and show eth1,eth2 and eth3 as blank space)

Question: Is there any way to remove those blank space/line? As in, take out the blank line/space if it doesn't detect the interface. I read up the manual page, it seems i can't find any argument to group it up.

Advice needed. Thanks in advance.

Screenshot:

[URL="http://s23.postimg.org/k7umnh9e3/image.jpg"]

Code:

alignment bottom_left

background no 

border_width 1

cpu_avg_samples 2

default_color blue 

default_outline_color blue 

default_shade_color blue 

draw_borders no

draw_graph_borders yes

draw_outline no 

draw_shades no 

xftfont arial 

gap_x 5

gap_y 60

minimum_size 5 5

maximum_width 400

net_avg_samples 2

no_buffers yes

out_to_console no

own_window yes

own_window_class System Monitor

own_window_colour white 

own_window_type normal

stippled_borders 0

update_interval 3.0

uppercase no

use_spacer no

use_xft yes



TEXT

${color darkblue}$nodename



${color red}Server IP: 

${if_existing /proc/net/route eth0}${color darkgreen}eth0 ${color blue}${addr eth0} ${endif}

${if_existing /proc/net/route eth1}${color darkgreen}eth1 ${color blue}${addr eth1} ${endif}

${if_existing /proc/net/route eth2}${color darkgreen}eth2 ${color blue}${addr eth2} ${endif}

${if_existing /proc/net/route eth3}${color darkgreen}eth3 ${color blue}${addr eth3} ${endif}



${color black}Uptime:    $color $uptime



${color red}Memory:

${color black}RAM $color $alignc $mem / $memmax $alignr $memperc%

$membar



${color red}File Systems:

${color black} /    $color${fs_used /}/${fs_size /} 

${fs_used_perc /}% ${fs_bar 8 /}

${color black} /var $color${fs_used /var}/${fs_size /var}

${fs_used_perc /var}% ${fs_bar 8 /var}

${color black} /mnt $color${fs_used /mnt}/${fs_size /mnt}

${fs_used_perc /mnt}% ${fs_bar 8 /mnt}



${color red}Networking:

${if_existing /proc/net/route eth0}${color darkgreen}eth0 ${color black}Up:$color ${upspeed eth0} kb/s  ${color black}Total: $color ${totalup eth0} ${endif}

${if_existing /proc/net/route eth0}${color darkgreen}eth0 ${color black}Down:$color ${downspeed eth0} kb/s  Total: ${totaldown eth0} ${endif}



${if_existing /proc/net/route eth1}${color darkgreen}eth1 ${color black}Up:$color ${upspeed eth1} kb/s  ${color black}Total: $color ${totalup eth1} ${endif}

${if_existing /proc/net/route eth1}${color darkgreen}eth1 ${color black}Down:$color ${downspeed eth1} kb/s  Total: ${totaldown eth1} ${endif}



${if_existing /proc/net/route eth2}${color darkgreen}eth2 ${color black}Up:$color ${upspeed eth2} kb/s  ${color black}Total: $color ${totalup eth2} ${endif}

${if_existing /proc/net/route eth2}${color darkgreen}eth2 ${color black}Down:$color ${downspeed eth2} kb/s  Total: ${totaldown eth2} ${endif}



${if_existing /proc/net/route eth3}${color darkgreen}eth3 ${color black}Up:$color ${upspeed eth3} kb/s  ${color black}Total: $color ${totalup eth3} ${endif}

${if_existing /proc/net/route eth3}${color darkgreen}eth3 ${color black}Down:$color ${downspeed eth3} kb/s  Total: ${totaldown eth3} ${endif}

if
then
else
endif

works for conky also, I used it thusly:

Code:

${if_mounted /media/flash}${goto 600}${color red}USB$color is ${fs_free_perc /media/flash/}% Free$color${else}${color red}USB Not Mounted$color${endif}

but I never tried with multiple if statements.
If this doesn't provide enough incentive, maybe I'll have a look at it for Christmas, or the day after.

http://conky.pitstop.free.fr/wiki/in...ments_%28en%29

if you add a new line (= press enter) in conkyrc's TEXT section, it will be displayed as such.
if you don't want spaghetticode, you can use \ at the end of each line (except where needed).

Quote:

Originally Posted by Habitual (Post 5086379)

if
then
else
endif

works for conky also, I used it thusly:

Code:

${if_mounted /media/flash}${goto 600}${color red}USB$color is ${fs_free_perc /media/flash/}% Free$color${else}${color red}USB Not Mounted$color${endif}

hmm, i don't want it to display any error message if it doesn't detect the adapter... thanks for your advice :)

Quote:

Originally Posted by ondoho (Post 5086394)

if you add a new line (= press enter) in conkyrc's TEXT section, it will be displayed as such.
if you don't want spaghetticode, you can use \ at the end of each line (except where needed).

i see. any coding for me to refer for this kind of issue? the \ doesn't work as i want too. :( thanks for your advice :)

Hello,

AFAIK, the only way to do that, is to have only one line of code (use \ for better readability), and use goto/voffset to move to the next line when required:

Code:

${color red}Server IP:\

${if_existing /proc/net/route eth0}${goto 8}${voffset 15}${color darkgreen}eth0 ${color blue}${addr eth0} ${endif}\

${if_existing /proc/net/route eth1}${goto 8}${voffset 15}${color darkgreen}eth1 ${color blue}${addr eth1} ${endif}\

${if_existing /proc/net/route eth2}${goto 8}${voffset 15}${color darkgreen}eth2 ${color blue}${addr eth2} ${endif}\

${if_existing /proc/net/route eth3}${goto 8}${voffset 15}${color darkgreen}eth3 ${color blue}${addr eth3} ${endif}

you might have to change the voffset value according to the used font.

Hope this helps.

Greetings.

--
SeB

Quote:

Originally Posted by phenixia2003 (Post 5087085)

Hello,

AFAIK, the only way to do that, is to have only one line of code (use \ for better readability), and use goto/voffset to move to the next line when required:

Code:

${color red}Server IP:\

${if_existing /proc/net/route eth0}${goto 8}${voffset 15}${color darkgreen}eth0 ${color blue}${addr eth0} ${endif}\

${if_existing /proc/net/route eth1}${goto 8}${voffset 15}${color darkgreen}eth1 ${color blue}${addr eth1} ${endif}\

${if_existing /proc/net/route eth2}${goto 8}${voffset 15}${color darkgreen}eth2 ${color blue}${addr eth2} ${endif}\

${if_existing /proc/net/route eth3}${goto 8}${voffset 15}${color darkgreen}eth3 ${color blue}${addr eth3} ${endif}

you might have to change the voffset value according to the used font.

Hope this helps.

Greetings.

--
SeB

Thanks :hattip: works like a charm.
For me, vertical offset 23 with this font "xftfont Liberarion Mono:size=14"

Quote:

Originally Posted by zarksentinel (Post 5087066)

hmm, i don't want it to display any error message if it doesn't detect the adapter... thanks for your advice :)

try something like:

Code:

${color red}Networking:

${if_existing /proc/net/route eth0}${color darkgreen}eth0 ${color black}Up:$color ${upspeed eth0} kb/s  ${color black}Total: $color ${totalup eth0} 

${/proc/net/route eth0}${color darkgreen}eth0 ${color black}Down:$color ${downspeed eth0} kb/s  Total: ${totaldown eth0} ${endif}

else 

${if_existing /proc/net/route eth1}${color darkgreen}eth1 ${color black}Up:$color ${upspeed eth1} kb/s  ${color black}Total: $color ${totalup eth1}

${/proc/net/route eth1}${color darkgreen}eth1 ${color black}Down:$color ${downspeed eth1} kb/s  Total: ${totaldown eth1} ${endif}

else

${if_existing /proc/net/route eth2}${color darkgreen}eth2 ${color black}Up:$color ${upspeed eth2} kb/s  ${color black}Total: $color ${totalup eth2} 

${/proc/net/route eth2}${color darkgreen}eth2 ${color black}Down:$color ${downspeed eth2} kb/s  Total: ${totaldown eth2} ${endif}

else

${if_existing /proc/net/route eth3}${color darkgreen}eth3 ${color black}Up:$color ${upspeed eth3} kb/s  ${color black}Total: $color ${totalup eth3} 

${/proc/net/route eth3}${color darkgreen}eth3 ${color black}Down:$color ${downspeed eth3} kb/s  Total: ${totaldown eth3} ${endif}

Stolen from
"Notice the $endif at the end of the line – that’s how we close the $if_existing statement so that only the information between the two is conditional on the conditions being met"

There is NO "then" just

Code:

if

else

endif

sorry about that.

You won't need the second if_existing for each adapter as the first if_existing would include it, if it exists.

I think I did something similar by putting the ${endif} after the line feed, so something like:

Code:

${if_existing /proc/net/route eth0}${color darkgreen}eth0 ${color black}Up:$color ${upspeed eth0} kb/s  ${color black}Total: $color ${totalup eth0}

${color darkgreen}eth0 ${color black}Down:$color ${downspeed eth0} kb/s  Total: ${totaldown eth0} 

${endif}${if_existing /proc/net/route eth1}${color darkgreen}eth1 ${color black}Up:$color ${upspeed eth1} kb/s  ${color black}Total: $color ${totalup eth1}

${color darkgreen}eth1 ${color black}Down:$color ${downspeed eth1} kb/s  Total: ${totaldown eth1} 

${endif}...

My nasty hack was to append the "if_existing" to the end of the PREVIOUS line, with the code to be executed on it's own line, including the endif and the next if.
That way, if the condition was true, it got a line-feed, if not, it didn't.

But now, after a quick facepalm, I'm trying to figure out where to put a load of \'s so it makes sense to read again... :D

Quote:

Originally Posted by descendant_command (Post 5087496)

My nasty hack was to append the "if_existing"...

Isn't that was conky is all about? Hacks? ;)
I'd just write a shell script and have conky call that, if it were me.

That's not a hack at all, it's just using the formatting language as it is suppose to be used. The "if_existing...endif" blocks encompass all that will be shown should that condition be true and that includes any whitespace or line feeds. How else do you expect conky to know whether you want a line feed or not without you specifying it?
You were also, in my opinion, using too many "if_existing" blocks are you only need one per condition not one per line of text.