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xwayland: introduce WLR_XWAYLAND for specifying which Xwayland to use

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When debugging Xwayland-related issues, a common first step in debugging
has been to ask the reporter to move their real Xwayland to
/usr/bin/Xwayland.bin, and create a shell script starting Xwayland with
extra arguments under the original /usr/bin/Xwayland location.

Introducing a `WLR_XWAYLAND` environment variable makes this less
invasive, by allowing the user to swap out Xwayland without resorting to
global system changes (or source patches).
This commit is contained in:
Tudor Brindus 2020-10-03 14:16:54 -04:00 • committed by Simon Ser
parent feb0e1c74d
commit 1b0e4c7e6e
2 changed files with 11 additions and 1 deletions
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10
xwayland/server.c
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@ -107,8 +107,16 @@ noreturn static void exec_xwayland(struct wlr_xwayland_server *server) {
dup2(devnull, STDERR_FILENO);
}
const char *xwayland_path = getenv("WLR_XWAYLAND");
if (xwayland_path) {
wlr_log(WLR_INFO, "Using Xwayland binary to '%s' due to WLR_XWAYLAND",
xwayland_path);
} else {
xwayland_path = "Xwayland";
}
// This returns if and only if the call fails
execvp("Xwayland", argv);
execvp(xwayland_path, argv);
wlr_log_errno(WLR_ERROR, "failed to exec Xwayland");
close(devnull);