hf 14a list helptext handling by CmdTraceListAlias, to be generalized if ok

client/src/cmdhf14a.c

@@ -171,12 +171,13 @@ static uint16_t frameLength = 0;
 uint16_t atsFSC[] = {16, 24, 32, 40, 48, 64, 96, 128, 256};
 
 static int CmdHF14AList(const char *Cmd) {
-    char args[128] = {0};
+    int ret = CmdTraceListAlias(Cmd, "hf 14a list");
-    if (strlen(Cmd) == 0) {
+    if (ret != PM3_SUCCESS) {
-        snprintf(args, sizeof(args), "-t 14a");
+        return ret;
-    } else {
-        strncpy(args, Cmd, sizeof(args) - 1);
     }
+    char args[128] = {0};
+    snprintf(args, sizeof(args), "-t 14a ");
+    strncat(args, Cmd, sizeof(args) - strlen(args));
     return CmdTraceList(args);
 }
 

client/src/cmdtrace.c

@@ -591,6 +591,37 @@ static int CmdTraceSave(const char *Cmd) {
     return PM3_SUCCESS;
 }
 
+int CmdTraceListAlias(const char *Cmd, const char *alias) {
+    CLIParserContext *ctx;
+    char example[200] = {0};
+    sprintf(example,
+            "%s -f                          -> show frame delay times\n"
+            "%s -1                          -> use trace buffer ",
+            alias, alias);
+    CLIParserInit(&ctx, alias,
+                  "Alias of `trace list -t` with selected protocol data to annotate trace buffer\n"
+                  "You can load a trace from file (see `trace load -h`) or it be downloaded from device by default\n"
+                  "It accepts all other arguments of `trace list`. Note that some might not be relevant for this specific protocol",
+                  example
+                 );
+
+    void *argtable[] = {
+        arg_param_begin,
+        arg_lit0("1", "buffer", "use data from trace buffer"),
+        arg_lit0("f", NULL, "show frame delay times"),
+        arg_lit0("c", NULL, "mark CRC bytes"),
+        arg_lit0("r", NULL, "show relative times (gap and duration)"),
+        arg_lit0("u", NULL, "display times in microseconds instead of clock cycles"),
+        arg_lit0("x", NULL, "show hexdump to convert to pcap(ng)\n"
+                 "                                   or to import into Wireshark using encapsulation type \"ISO 14443\""),
+        arg_strx0(NULL, "dict", "<file>", "use dictionary keys file"),
+        arg_param_end
+    };
+    CLIExecWithReturn(ctx, Cmd, argtable, true);
+    CLIParserFree(ctx);
+    return PM3_SUCCESS;
+}
+
 int CmdTraceList(const char *Cmd) {
     CLIParserContext *ctx;
     CLIParserInit(&ctx, "trace list",

client/src/cmdtrace.h

@@ -15,5 +15,6 @@
 
 int CmdTrace(const char *Cmd);
 int CmdTraceList(const char *Cmd);
+int CmdTraceListAlias(const char *Cmd, const char *alias);
 
 #endif