Invoking "halcmd -s" within TCL script

HansU
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4 years 11 months ago #225217 by HansU

Invoking "halcmd -s" within TCL script was created by HansU

Hi,
I want to use something like “halcmd -s show ...” with a library call in a TCL script. In halshow.tcl, the function hal seems to be the halcmd equivalent. But except the “-s” parameter. This isn’t accepted here.
My further investigation led to the definition of hal in linuxcnc.tcl.in.

Code:

proc hal {args} {
load $::linuxcnc::TCL_LIB_DIR/hal.so eval hal $args
}

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HansU
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4 years 11 months ago #227317 by HansU

Replied by HansU on topic Invoking "halcmd -s" within TCL script

That is not possible because the hal library provides only the functions like "show" and so on defined in halcmd.c:

Code:

{"show", FUNCT(do_show_cmd), A_ONE | A_OPTIONAL | A_PLUS},

But the command line option "-s" for scriptmode is only set in halcmd_main.c, so not accessible in the lib.

And of course it is also possible to invoke a subprocess with 'exec':

Code:

exec halcmd -s

Maybe not so performant as the library call.

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