alsaucm: add also card index for '-c' argument

Make semantics for this argument in sync with other ALSA utilities.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/alsaucm/usecase.c b/alsaucm/usecase.c
index 1dba1caa2b59a153542581b198afd72a723bb21c..a5c815591dca94ab2fafdc41fe5598c9ceff15cd 100644 (file)
--- a/alsaucm/usecase.c
+++ b/alsaucm/usecase.c
@@ -123,6 +123,20 @@ static void dump_help(struct context *context)
 );
 }
 
+int is_long(const char *str)
+{
+       char *end;
+       if (!*str)
+               return 0;
+       errno = 0;
+       strtol(str, &end, 10);
+       if (errno)
+               return 0;
+       if (*end)
+               return 0;
+       return 1;
+}
+
 static int parse_line(struct context *context, char *line)
 {
        char *start, **nargv;
@@ -202,6 +216,15 @@ static void do_initial_open(struct context *context)
 
        /* open library */
        if (!context->no_open) {
+               if (is_long(context->card)) {
+                       snprintf(name, sizeof(name), "hw:%s", context->card);
+                       free(context->card);
+                       context->card = strdup(name);
+               }
+               if (context->card == NULL) {
+                       fprintf(stderr, "%s: empty card name\n", context->command);
+                       my_exit(context, EXIT_FAILURE);
+               }
                err = snd_use_case_mgr_open(&context->uc_mgr,
                                            context->card);
                if (err < 0) {