WIP: add getopt

   Commit for code review from #devuan-dev room. Unfortunately,
   any use of flags in the while(getopt) loop causes the system tray
   icons to malfunction. If a parameter-with-value is used, the tray
   icons are entirely absent. If a parameter flag is used by itself,
   the tray icons do not load their icons.

1 files changed, 34 insertions, 1 deletions

diff --git a/experimental/keyboard-leds-trayicons.c b/experimental/keyboard-leds-trayicons.c
index 676849e..9e32822 100644
--- a/experimental/keyboard-leds-trayicons.c
+++ b/experimental/keyboard-leds-trayicons.c
@@ -654,7 +654,8 @@ typedef struct {
 } configuration;
 
 // this should be configurable with -c parameter (getopts?)
-char* conffile = "/home/bgstack15/keyboard-leds-trayicons.conf";
+char* conffile = "NONE";
+int debug = 0;
 
 // slightly modified from example https://github.com/benhoyt/inih
 static int handler(void* user, const char* section, const char* name, const char* value) {
@@ -704,8 +705,40 @@ void sig_usr(int signo) {
    return;
 }
 
+int fprint_usage(char **argv) {
+  printf("Usage: %s [-c CONFFILE] [-d] [-h]\n", *argv);
+  printf("Create a system tray icon as specified\n");
+  printf("\n");
+  printf("  -c CONFFILE\tUse the specified config file (required)\n");
+  printf("  -d \tTurn debug messages on\n");
+  printf("  -h \tDisplay this help message\n");
+  printf("\n");
+  return 0;
+}
+
+
 int main(int argc, char **argv) {
 
+   conffile = "/home/bgstack15/keyboard-leds-trayicons.conf";
+
+   // Step 0: parse parameters
+   int c;
+   while ((c = getopt(argc, argv, "c:dh")) != -1)
+      switch (c) {
+      case 'c':
+         conffile = optarg;
+         break;
+      case 'd':
+         debug = 1;
+         break;
+      case 'h':
+         return fprint_usage(argv);
+         break;
+      case '?':
+         fprintf(stderr, "Unknown option: %c\n", optopt);
+         return 1;
+   };
+
    // Step 1: load config
    configuration config;
    if (ini_parse(conffile, handler, &config) < 0) {