Implement -U for NetBSD.

Tested on NetBSD 10.
Takes part of #2072.

doc/man.md.j2

@@ -163,7 +163,7 @@ file.
 **-U \| \--unique**
 
 :   Conky won't start if another Conky process is already running. Implemented
-    only for Linux, FreeBSD and Haiku.
+    only for Linux, FreeBSD, NetBSD and Haiku.
 
 **-v \| -V \| \--version** 
 

src/bsdcommon.cc

@@ -53,7 +53,7 @@ bool bsdcommon::init_kvm() {
   }
 
   kvm_initialised = true;
-  return false;
+  return true;
 }
 
 void bsdcommon::deinit_kvm() {
@@ -223,7 +223,7 @@ static bool is_top_process(BSD_COMMON_PROC_STRUCT *p) {
 #endif
 }
 
-static int32_t get_pd(BSD_COMMON_PROC_STRUCT *p) {
+static int32_t get_pid(BSD_COMMON_PROC_STRUCT *p) {
 #if defined(__NetBSD__)
   return p->p_pid;
 #else
@@ -309,7 +309,7 @@ void bsdcommon::update_top_info() {
       continue;
     }
 
-    proc = get_process(get_pd(p));
+    proc = get_process(get_pid(p));
     if (!proc) {
       continue;
     }
@@ -317,3 +317,36 @@ void bsdcommon::update_top_info() {
     proc_from_bsdproc(proc, p);
   }
 }
+
+static bool is_process(BSD_COMMON_PROC_STRUCT *p, const char *name) {
+#if defined(__NetBSD__)
+  return p->p_comm[0] != 0 && strcmp(p->p_comm, name) == 0;
+#else
+  #error Not supported BSD system 
+#endif
+}
+
+bool bsdcommon::is_conky_already_running() {
+  if (!init_kvm()) {
+    return false;
+  }
+
+  struct process *proc = nullptr;
+  short unsigned int nprocs = 0;
+  int instances = 0;
+
+  BSD_COMMON_PROC_STRUCT *ps = get_processes(&nprocs);
+  if (ps == nullptr) {
+    return false;
+  }
+
+  for (int i = 0; i < nprocs && instances < 2; ++i) {
+    BSD_COMMON_PROC_STRUCT *p = &ps[i];
+
+    if (is_process(p, "conky")) {
+      ++instances;
+    }
+  }
+
+  return instances > 1;
+}

src/bsdcommon.h

@@ -56,6 +56,7 @@ namespace bsdcommon {
 
   void get_number_of_running_processes(short unsigned int *run_procs);
   void update_top_info();
-};
+  bool is_conky_already_running();
+}
 
 #endif /*BSDCOMMON_H_*/

src/conky.cc

@@ -2110,9 +2110,9 @@ void set_current_config() {
 const char *getopt_string =
     "vVqdDSs:t:u:i:hc:p:"
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__NetBSD__)
     "U"
-#endif /* Linux || FreeBSD || Haiku */
+#endif /* Linux || FreeBSD || Haiku || NetBSD */
 #ifdef BUILD_X11
     "x:y:w:a:X:m:f:"
 #ifdef OWN_WINDOW
@@ -2144,9 +2144,9 @@ const struct option longopts[] = {
     {"text", 1, nullptr, 't'},          {"interval", 1, nullptr, 'u'},
     {"pause", 1, nullptr, 'p'},
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__NetBSD__)
     {"unique", 0, nullptr, 'U'},
-#endif /* Linux || FreeBSDi || Haiku */
+#endif /* Linux || FreeBSDi || Haiku || NetBSD */
     {nullptr, 0, nullptr, 0}
 };
 

src/main.cc

@@ -282,9 +282,9 @@ static void print_help(const char *prog_name) {
          "   -p, --pause=SECS          pause for SECS seconds at startup "
          "before doing anything\n"
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__NetBSD__)
          "   -U, --unique              only one conky process can be created\n"
-#endif /* Linux || FreeBSD || Haiku */
+#endif /* Linux || FreeBSD || Haiku || NetBSD */
          , prog_name);
 }
 
@@ -368,18 +368,18 @@ int main(int argc, char **argv) {
         break;
 #endif /* BUILD_X11 */
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__NetBSD__)
       case 'U':
         unique_process = true;
         break;
-#endif /* Linux || FreeBSD || Haiku */
+#endif /* Linux || FreeBSD || Haiku || NetBSD */
       case '?':
         return EXIT_FAILURE;
     }
   }
 
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__NetBSD__)
   if (unique_process && is_conky_already_running()) {
     NORM_ERR("already running");
     return 0;

src/netbsd.cc

@@ -322,3 +322,6 @@ int update_diskio(void) {
   return 1;
 }
 
+bool is_conky_already_running() {
+  return bsdcommon::is_conky_already_running();
+}

src/netbsd.h

@@ -20,4 +20,6 @@
 int get_entropy_avail(unsigned int *);
 int get_entropy_poolsize(unsigned int *);
 
+bool is_conky_already_running();
+
 #endif /*NETBSD_H_*/