grass.core.find_program() problem with ssh and other

[lucadelu]

there are some program that print help message to stderr instead stdout and this return false instead true in grass.core.find_program().
With martin we see:
ssh --help
echo $?
255

instead
svn --help
echo $?
0

[glynn]

Replying to lucadelu:

there are some program that print help message to stderr instead stdout and this return false instead true in grass.core.find_program().

Whether the program prints anything to either stream is entirely irrelevant; find_program() simply checks the return code.

In order for find_program() to work, you need to find some invocation which returns a zero exit status (indicating success). If running the command with --help is considered an error (non-zero exit status), you'll need to find some other option. E.g. for ssh, you can use "ssh -V".

[lucadelu]

Replying to glynn:

In order for find_program() to work, you need to find some invocation which returns a zero exit status (indicating success). If running the command with --help is considered an error (non-zero exit status), you'll need to find some other option. E.g. for ssh, you can use "ssh -V".

Ok, thanks it works for me