Sys

This file contains modules to access system resources such as processes and environment variables.

This module gives access to environement variable, where str is a type with string traits.

module environment(str) = {

The get action gets the value of an environment variable name or returns the empty string if name is undefined.

    action get(name:str) returns (res:str) = {
    res := cast(ivy.getenv(cast(name)))
    }
}

module sys_argv(pos,str) = {
    action end returns (res:pos) = {
    res := cast(ivy.get_argc);
    }
    action value(idx:pos) returns (res:str) = {
    res := cast(ivy.get_argv(cast(idx),cast(res)));
    }
}

object sys = {
    module command(pid,cmd,retcode) = {
    action command(s:cmd) returns (res:pid) = {
        res := cast(ivy.subproc(cast(s)));
    }
    action wait(s:pid) returns (res:retcode) = {
        res := cast(ivy.wait(cast(s)));
    }
    }
}