[Coco] Re: Path command wasRe: OS-9 LVL II

[John Donaldson]

Kevin,
   The PATH command does not seem to work for me. I have it in my Startup as
PATH= /DD/CMDS  /DD/PASCAL_CMDS

I even typed the same thing from the command prompt and I can do a 
PATH=?  and it will print
/DD/CMDS
/DD/PASCAL_CMDS

BUT when I try and execute a executable file in Pascal_cmds called test, 
I get ERROR 216 - Path Not
Found. Only if I move it to the /DD/CMDS  or do a CHX /dd/PASCAL_CMDS 
will it execute.

John Donaldson



KnudsenMJ at aol.com wrote:


>In a message dated 2/19/05 3:11:25 PM Eastern Standard Time,  

>kevdig at hypersurf.com writes:

>

>  

>

>>   In Unix (& Linux), path is NOT a command. It is a  feature of the 

>>command interpreter (i.e. shell) and some of the exec  LIBRARY routines. 

>>It is all built on the ENV variables that the Unix  process model 

>>includes. Does OS9 have ENV?

>>    

>>

>OS9 6809 stock shell does not have ENV or anything like PATH, but the  rather 

>popular ShellPlus replacement shell does support ENV variables.  As  does the 

>Shell in OS9/68K.

> 

>  

>

>>A shell is not the only place to launch a shell from.

>>    

>>

>

>This reminds me, that even under ShellPlus, if you type an executable  

>program's name, ShellPlus knows how to hunt down the file via the dirs given in  the 

>PATH variable.

> 

>But if a program tries to open a file by name, it is going thru the OS, but  

>not the Shell, so PATH expansion might not be available.  The F$Open OS  call 

>is restricted to what Microware built into OS9, and does not have access to  

>the powers of ShellPlus.  Even the Linux C-Library open() command has  

>limitations in this regard.

> 

>So if a Pascal or Basic09 program tries to execute another file, which is  

>not in /dd/cmds, the PATH won't help.  PATH only works from the shell, as  in 

>command line or script.  It *should* work right from a shell("command  string") 

>or system("string") in Basic09 or C, since these invoke the  shell.  --Mike K.

> 

>

>  

>