sys: add packagelist method

Add method to list installed software packages directly from
/usr/lib/opkg/status (ie. no need to have opkg installed).

ubus call rpc-sys packagelist

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

diff --git a/sys.c b/sys.c
index 3691dfb..4f008ba 100644 (file)
--- a/sys.c
+++ b/sys.c
@@ -154,6 +154,84 @@ rpc_cgi_password_set(struct ubus_context *ctx, struct ubus_object *obj,
 }
 
 static int
+rpc_sys_packagelist(struct ubus_context *ctx, struct ubus_object *obj,
+                struct ubus_request_data *req, const char *method,
+                struct blob_attr *msg)
+{
+       struct blob_buf buf = { 0 };
+       char var[256], pkg[128], ver[128];
+       char *tmp, *p1, *p2, *p3;
+       void *tbl;
+
+       FILE *f = fopen("/usr/lib/opkg/status", "r");
+       if (!f)
+               return UBUS_STATUS_NOT_FOUND;
+
+       blob_buf_init(&buf, 0);
+       tbl = blobmsg_open_table(&buf, "packages");
+       pkg[0] = ver[0] = '\0';
+
+       while(fgets(var, sizeof(var), f)) {
+               p1 = strchr(var, ' ');
+               p2 = p3 = NULL;
+               if (!p1)
+                       goto procstr;
+
+               *p1++ = '\0';
+               p2 = strchr(p1, ' ');
+               if (!p2) {
+                       tmp = strchr(p1, '\n');
+                       if (tmp)
+                               *tmp = '\0';
+                       goto procstr;
+               }
+
+               *p2++ = '\0';
+               p3 = strchr(p2, ' ');
+               if (!p3) {
+                       tmp = strchr(p2, '\n');
+                       if (tmp)
+                               *tmp = '\0';
+                       goto procstr;
+               }
+
+               *p3++ = '\0';
+               tmp = strchr(p3, '\n');
+               if (tmp)
+                       *tmp = '\0';
+
+procstr:
+               if (!p1)
+                       continue;
+
+               if (!strcmp(var, "Package:")) {
+                       strncpy(pkg, p1, sizeof(pkg));
+                       continue;
+               }
+
+               if (!strcmp(var, "Version:")) {
+                       strncpy(ver, p1, sizeof(ver));
+                       continue;
+               }
+
+               if (p2 && p3 &&
+                   !strcmp(var, "Status:") &&
+                   !strcmp(p1, "install") &&
+                   !strcmp(p2, "user") &&
+                   !strcmp(p3, "installed") && pkg[0] && ver[0]) {
+                       blobmsg_add_string(&buf, pkg, ver);
+                       pkg[0] = ver[0] = '\0';
+               }
+       }
+
+       blobmsg_close_table(&buf, tbl);
+       ubus_send_reply(ctx, req, buf.head);
+       fclose(f);
+
+       return 0;
+}
+
+static int
 rpc_sys_upgrade_test(struct ubus_context *ctx, struct ubus_object *obj,
                        struct ubus_request_data *req, const char *method,
                        struct blob_attr *msg)
@@ -234,6 +312,7 @@ static int
 rpc_sys_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
 {
        static const struct ubus_method sys_methods[] = {
+               UBUS_METHOD_NOARG("packagelist", rpc_sys_packagelist),
                UBUS_METHOD("password_set", rpc_cgi_password_set, rpc_password_policy),
                UBUS_METHOD_NOARG("upgrade_test", rpc_sys_upgrade_test),
                UBUS_METHOD("upgrade_start",      rpc_sys_upgrade_start,