[Spice-devel] [PATCH 4/4] vdagent: Use glib's commandline parser

[Frediano Ziglio]

> 
> From: Victor Toso <me at victortoso.com>
> 
> As we already depend on glib, let's remove code that glib can take
> care. In this case, we don't need to handle commandline parsing
> ourselves.
> 
> In regard the global variables:
> 
> * static const char * -> static char * [only paths]
>   path variables: portdev, fx_dir, vdagentd_socket
> 
> * static int -> static gboolean
>   flags: debug, do_daemonize, x11_sync, fx_open_dir
> 
> Signed-off-by: Victor Toso <victortoso at redhat.com>
> ---
>  src/vdagent/vdagent.c | 107
>  +++++++++++++++++++++++---------------------------
>  1 file changed, 49 insertions(+), 58 deletions(-)
> 
> diff --git a/src/vdagent/vdagent.c b/src/vdagent/vdagent.c
> index 4f8079f..2c4ec3f 100644
> --- a/src/vdagent/vdagent.c
> +++ b/src/vdagent/vdagent.c
> @@ -45,17 +45,45 @@
>  #include "x11.h"
>  #include "file-xfers.h"
>  
> -static const char *portdev = DEFAULT_VIRTIO_PORT_PATH;
> -static const char *vdagentd_socket = VDAGENTD_SOCKET;
> -static int debug = 0;
> -static const char *fx_dir = NULL;
> -static int fx_open_dir = -1;
>  static struct vdagent_x11 *x11 = NULL;
>  static struct vdagent_file_xfers *vdagent_file_xfers = NULL;
>  static struct udscs_connection *client = NULL;
>  static int quit = 0;
>  static int version_mismatch = 0;
>  
> +/* Command line options */
> +static gboolean debug = FALSE;
> +static gboolean x11_sync = FALSE;
> +static gboolean fx_open_dir = FALSE;
> +static gboolean do_daemonize = TRUE;
> +static char *fx_dir;
> +static char *portdev = DEFAULT_VIRTIO_PORT_PATH;
> +static char *vdagentd_socket = VDAGENTD_SOCKET;

Why don't you get a warning here? You are assigning a constant string
to a not const one. What's the problem of the old declaration?
GOptionEntry accepts any not const pointer and a const char ** is a not
const pointer.

> +
> +static GOptionEntry entries[] ={
> +    { "debug", 'd', 0,
> +       G_OPTION_ARG_NONE, &debug,
> +       "Enable debug", NULL },
> +    { "foreground", 'x', G_OPTION_FLAG_REVERSE,
> +       G_OPTION_ARG_NONE, &do_daemonize,
> +       "Do not daemonize the agent", NULL },
> +    { "x11-abort-on-error", 'y', 0,
> +      G_OPTION_ARG_NONE, &x11_sync,
> +      "Aborts on errors from X11", NULL },
> +    { "file-xfer-open-dir", 'o', 0,
> +       G_OPTION_ARG_NONE, &fx_open_dir,
> +       "Open directory after completing file transfer", NULL },
> +    { "virtio-serial-port-path", 's', 0,
> +      G_OPTION_ARG_STRING, &portdev,
> +      "Set virtio-serial path ("  DEFAULT_VIRTIO_PORT_PATH ")", NULL },
> +    { "file-xfer-save-dir", 'f', 0,
> +      G_OPTION_ARG_STRING, &fx_dir,
> +      "Set directory to file transfers files", NULL},
> +    { "vdagentd-socket", 'S', 0, G_OPTION_ARG_STRING,
> +       &vdagentd_socket,
> +       "Set spice-vdagentd socket (" VDAGENTD_SOCKET ")", NULL },
> +};
> +
>  /**
>   * xfer_get_download_directory
>   *
> @@ -217,22 +245,6 @@ static int client_setup(int reconnect)
>      return client == NULL;
>  }
>  
> -static void usage(FILE *fp)
> -{
> -    fprintf(fp,
> -      "Usage: spice-vdagent [OPTIONS]\n\n"
> -      "Spice guest agent X11 session agent, version %s.\n\n"
> -      "Options:\n"
> -      "  -h                                print this text\n"
> -      "  -d                                log debug messages\n"
> -      "  -s <port>                         set virtio serial port\n"
> -      "  -S <filename>                     set udcs socket\n"
> -      "  -x                                don't daemonize\n"
> -      "  -f <dir|xdg-desktop|xdg-download> file xfer save dir\n"
> -      "  -o <0|1>                          open dir on file xfer
> completion\n",
> -      VERSION);
> -}
> -
>  static void quit_handler(int sig)
>  {
>      quit = 1;
> @@ -296,45 +308,24 @@ static int file_test(const char *path)
>  int main(int argc, char *argv[])
>  {
>      fd_set readfds, writefds;
> -    int c, n, nfds, x11_fd;
> -    int do_daemonize = 1;
> +    int n, nfds, x11_fd;
>      int parent_socket = 0;
> -    int x11_sync = 0;
>      struct sigaction act;
> -
> -    for (;;) {
> -        if (-1 == (c = getopt(argc, argv, "-dxhys:f:o:S:")))
> -            break;
> -        switch (c) {
> -        case 'd':
> -            debug++;
> -            break;
> -        case 's':
> -            portdev = optarg;
> -            break;
> -        case 'x':
> -            do_daemonize = 0;
> -            break;
> -        case 'y':
> -            x11_sync = 1;
> -            break;
> -        case 'h':
> -            usage(stdout);
> -            return 0;
> -        case 'f':
> -            fx_dir = optarg;
> -            break;
> -        case 'o':
> -            fx_open_dir = atoi(optarg);
> -            break;
> -        case 'S':
> -            vdagentd_socket = optarg;
> -            break;
> -        default:
> -            fputs("\n", stderr);
> -            usage(stderr);
> -            return 1;
> -        }
> +    GOptionContext *context;
> +    GError *error = NULL;
> +
> +    context = g_option_context_new(NULL);
> +    g_option_context_add_main_entries(context, entries, NULL);
> +    g_option_context_set_summary(context,
> +                                 "\tSpice session guest agent: X11\n"
> +                                 "\tVersion: " VERSION);
> +    g_option_context_parse(context, &argc, &argv, &error);
> +    g_option_context_free(context);
> +
> +    if (error) {
> +        g_printerr("Invalid arguments, %s\n", error->message);
> +        g_clear_error(&error);
> +        return -1;
>      }
>  
>      memset(&act, 0, sizeof(act));

Frediano