From fd961d2ea0eea2cc60f4af1aca6b6e7711d43995 Mon Sep 17 00:00:00 2001
From: "Anna (navi) Figueiredo Gomes" <navi@vlhl.dev>
Date: Fri, 12 Jul 2024 00:51:12 +0200
Subject: openrc-user: init script for users

adds a new multiplexed script for starting user sessions. it also sets
up XDG_RUNTIME_DIR.

Signed-off-by: Anna (navi) Figueiredo Gomes <navi@vlhl.dev>
---
 src/meson.build           |  1 +
 src/user_init/meson.build |  5 +++++
 src/user_init/user_init.c | 23 +++++++++++++++++++++++
 3 files changed, 29 insertions(+)
 create mode 100644 src/user_init/meson.build
 create mode 100644 src/user_init/user_init.c

(limited to 'src')

diff --git a/src/meson.build b/src/meson.build
index 76f6d8a1..cee6cb6c 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -34,3 +34,4 @@ subdir('start-stop-daemon')
 subdir('supervise-daemon')
 subdir('swclock')
 subdir('value')
+subdir('user_init')
diff --git a/src/user_init/meson.build b/src/user_init/meson.build
new file mode 100644
index 00000000..838805fb
--- /dev/null
+++ b/src/user_init/meson.build
@@ -0,0 +1,5 @@
+executable('user_init', ['user_init.c'],
+    include_directories: [incdir, einfo_incdir, rc_incdir],
+    link_with: [libeinfo, librc],
+    install: true,
+    install_dir: rc_bindir)
diff --git a/src/user_init/user_init.c b/src/user_init/user_init.c
new file mode 100644
index 00000000..1f79ec90
--- /dev/null
+++ b/src/user_init/user_init.c
@@ -0,0 +1,23 @@
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "rc.h"
+
+#define USERINIT RC_LIBEXECDIR "/sh/user-init.sh"
+
+int main(int argc, char **argv) {
+	struct passwd *user;
+	if (argc < 3)
+		return 1;
+
+	user = getpwnam(argv[1]);
+	if (!user || initgroups(user->pw_name, user->pw_gid) == -1
+			|| setgid(user->pw_gid) == -1
+			|| setuid(user->pw_uid) == -1)
+		return 1;
+
+	execl(user->pw_shell, "-", "-c", USERINIT, argv[2], NULL);
+}
-- 
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