xauth command is hardcoded to /usr/bin/xauth

[hashelq]

Description

firejail/src/firejail/x11.c

Lines 1180 to 1186 in eb5c971

	if (stat("/usr/bin/xauth", &s) == -1) {
	fprintf(stderr, "Error: xauth utility not found in /usr/bin. Please install it:\n");
	fprintf(stderr, " Debian/Ubuntu/Mint: sudo apt-get install xauth\n");
	fprintf(stderr, " Arch: sudo pacman -S xorg-xauth\n");
	fprintf(stderr, " Fedora: sudo dnf install xorg-x11-xauth\n");
	exit(1);
	}

Expected behavior

To find the executable in the path, or, at least, have an option to override the path to the binary.

Actual behavior

unix-way

Additional context

Despite the fact in most environments you can find binaries in /usr/bin, there are cases in which you cannot, like in NixOS, containers, small os images, etc.

Environment

NixOS (/usr/bin, as well as /bin are not used for apps like xauth)

Checklist

• I have performed a short search for similar issues (to avoid opening a duplicate).

[glitsj16]

Thank you for reporting this. Similar hardcoded reference to /usr/bin/xauth:

firejail/src/firejail/fs_lib2.c

Lines 168 to 170 in eb5c971

	// bring in xauth libraries
	if (arg_x11_xorg)
	fslib_mount_libs("/usr/bin/xauth", 1); // parse as user

@netblue30 @smitsohu Can you have a look at this please?