--limit flag throws exception: invalid argument "" for "-m, --memory" flag: invalid size: ''

[sar]

Usage of the --limit and --limit=0.25 factor flag throws runtime exception.

$ x11docker --limit  {any container:tag here}

$ x11docker --version
6.6.2

x11docker note: Option --limit does not avoid possibly flooding the hard disk
  in docker's container partition or in shared folders.
  It only restricts memory and CPU usage.

awk: cmd. line:1: BEGIN {print int( * 0.5)}
awk: cmd. line:1:                   ^ syntax error
date: Unknown option 'Ihours' (see "date --help")

x11docker ERROR: Startup of docker failed. Did not receive a container ID. 
     
  Last lines of container log: 
invalid argument "" for "-m, --memory" flag: invalid size: '' 
See 'docker run --help'.

  Type 'x11docker --help' for usage information
  Debug options: '--verbose' (full log) or '--debug' (log excerpt).
  Please report issues at https://github.com/mviereck/x11docker

Related to #93 parsing of memory output on host system, message thrown above shows syntax error.

$ free -b
*see below

$ free -b | grep Mem:
Mem:      33493553152 29517516800  3976036352  1157283840  1214283776

[mviereck]

Thank you for the report!
I get an additional entry available that x11docker wants to parse:

$ LC_ALL=C free -b
               total        used        free      shared  buff/cache   available
Mem:      8272060416  2676961280  2929102848   271794176  2665996288  5240299520
Swap:     8821661696           0  8821661696

It seems your version of free does not provide this information.

Yet I am not sure how to solve this. Maybe x11docker should add free and buff/cache to guess available memory?

[sar]

Thank you for the report!
I get an additional entry available that x11docker wants to parse:
It seems your version of free does not provide this information.

I truncated the swap, this is the actual output of the command:

$ free -b
		total        used        free      shared     buffers
Mem:      33493553152 29656408064  3837145088  1224491008  1216081920
-/+ buffers/cache:    28440326144  5053227008
Swap:      8589910016           0  8589910016

$ free --version
toybox 0.8.3

[mviereck]

I did not mean the swap line but a missing column. Your output does not show a column available.
I've uploaded a fix that adds the values of columns free and buffers in line mem:. That should approximately fit the available memory.