[Qemu-devel] [PATCH 1/1] qga: guest-set-user-password - added ability to create new user

["Denis V. Lunev" <den@openvz.org>]

From: Yuri Pudgorodskiy <yur@virtuozzo.com>

Added optional 'create' flag to guest-set-user-password command.
When it is specified, a new user will be created if it is not
exists yet.

The option to the existing command is added as password for newly created
user should be set as specified.

Signed-off-by: Yuri Pudgorodskiy <yur@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 qga/commands-posix.c | 36 ++++++++++++++++++++++++++++++++++++
 qga/commands-win32.c | 25 ++++++++++++++++++++++++-
 qga/qapi-schema.json |  3 ++-
 3 files changed, 62 insertions(+), 2 deletions(-)

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index c2ff970..5f60f08 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1951,6 +1951,8 @@ int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
 void qmp_guest_set_user_password(const char *username,
                                  const char *password,
                                  bool crypted,
+                                 bool has_create,
+                                 bool create,
                                  Error **errp)
 {
     Error *local_err = NULL;
@@ -1993,6 +1995,40 @@ void qmp_guest_set_user_password(const char *username,
         goto out;
     }
 
+    /* create new user if requested */
+    if (has_create && create) {
+        pid = fork();
+        if (pid == 0) {
+            char *str = g_shell_quote(username);
+            char *cmd = g_strdup_printf("id %s || useradd -m %s", str, str);
+            setsid();
+            reopen_fd_to_null(0);
+            reopen_fd_to_null(1);
+            reopen_fd_to_null(2);
+            execle("/bin/sh", "sh", "-c", cmd, NULL, environ);
+            _exit(EXIT_FAILURE);
+        } else if (pid < 0) {
+            error_setg_errno(errp, errno, "failed to create child process");
+            goto out;
+        }
+
+        ga_wait_child(pid, &status, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            goto out;
+        }
+
+        if (!WIFEXITED(status)) {
+            error_setg(errp, "child process has terminated abnormally");
+            goto out;
+        }
+
+        if (WEXITSTATUS(status)) {
+            error_setg(errp, "child process has failed to add new user");
+            goto out;
+        }
+    }
+
     pid = fork();
     if (pid == 0) {
         close(datafd[1]);
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index 0654fe4..5269f8b 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -1281,6 +1281,8 @@ get_net_error_message(gint error)
 void qmp_guest_set_user_password(const char *username,
                                  const char *password,
                                  bool crypted,
+                                 bool has_create,
+                                 bool create,
                                  Error **errp)
 {
     NET_API_STATUS nas;
@@ -1301,6 +1303,27 @@ void qmp_guest_set_user_password(const char *username,
     user = g_utf8_to_utf16(username, -1, NULL, NULL, NULL);
     wpass = g_utf8_to_utf16(rawpasswddata, -1, NULL, NULL, NULL);
 
+    if (has_create && create) {
+        USER_INFO_1 ui = { 0 };
+
+        ui.usri1_name = user;
+        ui.usri1_password = wpass;
+        ui.usri1_priv = USER_PRIV_USER;
+        ui.usri1_flags = UF_SCRIPT | UF_DONT_EXPIRE_PASSWD;
+        nas = NetUserAdd(NULL, 1, (LPBYTE)&ui, NULL);
+
+        if (nas == NERR_Success) {
+            goto out;
+        }
+
+        if (nas != NERR_UserExists) {
+            gchar *msg = get_net_error_message(nas);
+            error_setg(errp, "failed to add user: %s", msg);
+            g_free(msg);
+            goto out;
+        }
+    }
+
     pi1003.usri1003_password = wpass;
     nas = NetUserSetInfo(NULL, user,
                          1003, (LPBYTE)&pi1003,
@@ -1311,7 +1334,7 @@ void qmp_guest_set_user_password(const char *username,
         error_setg(errp, "failed to set password: %s", msg);
         g_free(msg);
     }
-
+out:
     g_free(user);
     g_free(wpass);
     g_free(rawpasswddata);
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index 01c9ee4..2f97862 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -787,6 +787,7 @@
 # @username: the user account whose password to change
 # @password: the new password entry string, base64 encoded
 # @crypted: true if password is already crypt()d, false if raw
+# @create: #optional user will be created if not exists (since 2.6)
 #
 # If the @crypted flag is true, it is the caller's responsibility
 # to ensure the correct crypt() encryption scheme is used. This
@@ -806,7 +807,7 @@
 # Since 2.3
 ##
 { 'command': 'guest-set-user-password',
-  'data': { 'username': 'str', 'password': 'str', 'crypted': 'bool' } }
+  'data': { 'username': 'str', 'password': 'str', 'crypted': 'bool', '*create': 'bool' } }
 
 # @GuestMemoryBlock:
 #
-- 
2.1.4