[PATCH] libwine: Add WINEUSER environment variable

[Myah Caron]

This environment variable is useful in a few cases:

 * If a user would rather not use their own username in the prefix.
 * If a user wants multiple users in a wine prefix (e.g. as separate
profiles for programs).
 * If the prefix was created with proton, which replaces the username
with steamuser, this allows the data under the home directory to be
usable under vanilla wine without needing symlinks or renaming the
directory.
 * Similarly, this allows prefixes created under a different username
(e.g. transferred from a different system) to be used.

Signed-off-by: Myah Caron <qsniyg at mail.com>
---
 libs/wine/config.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/wine/config.c b/libs/wine/config.c
index 2a3314cbfd..d05f021267 100644
--- a/libs/wine/config.c
+++ b/libs/wine/config.c
@@ -263,14 +263,14 @@ static void init_paths(void)
     struct stat st;

     const char *home = getenv( "HOME" );
-    const char *user = NULL;
+    const char *user = getenv( "WINEUSER" );
     const char *prefix = getenv( "WINEPREFIX" );
     char uid_str[32];
     struct passwd *pwd = getpwuid( getuid() );

     if (pwd)
     {
-        user = pwd->pw_name;
+        if (!user) user = pwd->pw_name;
         if (!home) home = pwd->pw_dir;
     }
     if (!user)
--
2.25.0