Changeset 86fe9d1 in mainline

Timestamp:

2012-08-19T16:11:31Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ad1aedc

Parents:

1ba95ba

Message:

wavplay: Add usage help.

File:

• uspace/app/wavplay/main.c (modified) (5 diffs)

uspace/app/wavplay/main.c

@@ -67 +67 @@
 }
 
-
 static void data_callback(void* arg, void *buffer, ssize_t size)
 {
@@ -124 +123 @@
         {"device", required_argument, 0, 'd'},
         {"record", no_argument, 0, 'r'},
+        {"help", no_argument, 0, 'h'},
         {0, 0, 0, 0}
 };
 
+static void print_help(const char* name)
+{
+        printf("Usage: %s [options] file\n", name);
+        printf("supported options:\n");
+        printf("\t -h, --help\t Print this help.\n");
+        printf("\t -r, --record\t Start recording instead of playback.\n");
+        printf("\t -d, --device\t Use specified device instead of sound "
+            "service. Use location path or special device `default'\n");
+}
 
 int main(int argc, char *argv[])
@@ -136 +145 @@
         int ret = 0;
         while (ret != -1) {
-                ret = getopt_long(argc, argv, "d:r", opts, &idx);
+                ret = getopt_long(argc, argv, "d:rh", opts, &idx);
                 switch (ret) {
                 case 'd':
@@ -145 +154 @@
                         record = true;
                         break;
+                case 'h':
+                        print_help(*argv);
+                        return 0;
                 };
         }
@@ -150 +162 @@
         if (optind == argc) {
                 printf("Not enough arguments.\n");
+                print_help(*argv);
                 return 1;
         }