openssh unix dev - Mar 2002 - problem with environment detecting

On Tue, 12 Mar 2002, Maxim Ryabenko wrote:
> Hello!
>
> I want  to detect some environment on a remote host (in C program,
getenv()),
> but it is failed. Here is a little program which I try to run on a remote
> host with command:  "#ssh myhost myecho"
>
> /* myecho */
> #include <stdio.h>
> main (){
>         char *dir;
>         if ((dir = getenv("MYDIR")) != NULL)
>                 printf ("environment is %s\n",dir);
>         else
>                 printf ("enviroment is not specified.\n");
> }
>
> it returns "enviroment is not specified.", although the
environment MYDIR is
> specified in /etc/profile on a remote host.
> In this way I can detect only $PATH, $USER, $HOSTNAME, but not MYDIR :(
>
> On the other hand "./ssh myhost echo $MYDIR" works correctly
>
First off do: ./ssh myhost echo \$MYDIR

All $xx and * are resolved BEFORE commands run.. the escape ensure it is
not.

Second /etc/profile is not read by non-tty sessions.

try: ssh -t myhost echo \$MYDIR

to see if you get better results.

- Ben

Hello!

I want  to detect some environment on a remote host (in C program, getenv()), 
but it is failed. Here is a little program which I try to run on a remote 
host with command:  "#ssh myhost myecho"

/* myecho */
#include <stdio.h>
main (){
        char *dir;
        if ((dir = getenv("MYDIR")) != NULL)
                printf ("environment is %s\n",dir);
        else
                printf ("enviroment is not specified.\n");
}

it returns "enviroment is not specified.", although the environment
MYDIR is
specified in /etc/profile on a remote host. 
In this way I can detect only $PATH, $USER, $HOSTNAME, but not MYDIR :(

On the other hand "./ssh myhost echo $MYDIR" works correctly

What is wrong?
Thank you!
Maxim

> The remote /etc/profile is not executed when you run a remote command
> using ssh.  Your remote echo appears to do what you want because
> variables get expanded inside double quotes.  Try it like this:
>
> 	ssh myhost 'echo $MYDIR'
>
> If you want the remote profile to be executed, you have to do something
> like this:
>
> 	ssh myhost '. /etc/profile; echo $MYDIR'
>
> Happy computing!
>
> Paul Allen
Thank you, Paul and Ben.

this is what I want,
ssh myhost '. /etc/profile; echo $MYDIR'  
It works good, thank you. 

Problem was not in standard command "echo". It was in my program (see
prev.
message).
This one works
.......
  if ((dir = getenv("MYDIR")) != NULL) 
.......
But this not
.......
  if ((dir = getenv("PATH")) != NULL) 
.......

It seems that there is another place (not /etc/profile), where environments 
PATH etc. are stored. But where?
Can I put my environment  there and do not run . /etc/profile like this:
ssh myhost '. /etc/profile;  ............'

Thank you so much!

p.s. sorry, my English is worst.
Maxim