GammaLib

Interesting, I thought that the decoding of the ~ symbol happens on the system level, but this seems not to be the case.

Note, however, that ~mike means /home/mike (or /Users/mike on Mac OS X).

I agree that both capabilities should be added to gammalib::expand_env.

I just verified this does not work on Scientific Linux, too.
I am not sure how the function gammailib::expand_env works exactly. Is it an effort for you to implement this?

I can look into that. Is it an urgent issue?

This probably belongs to the gammalib project after all.

I can look into that. Is it an urgent issue?

Thanks. No, not urgent at all simple workaround is to specify absolut paths. I just noted it and wanted it to be documented that we do not forget.

Here the logic how bash treats the tilde: http://www.gnu.org/software/bash/manual/html_node/Tilde-Expansion.html

See the following link to learn how to access a users home directory: http://stackoverflow.com/questions/2910377/get-home-directory-in-linux-c

#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>

const char *homedir;

if ((homedir = getenv("HOME")) == NULL) {
    homedir = getpwuid(getuid())->pw_dir;
}