Allow moving route for docker

Makefile

@@ -2,9 +2,21 @@ Q=@
 CC=gcc
 
 GCCCFLAGS=-Wno-format-truncation 
-CFLAGS=-std=c11 -pedantic -g -Wall -pthread -D_GNU_SOURCE -DVERBOSE
+CFLAGS=-std=c11 -pedantic -g -Wall -pthread -D_GNU_SOURCE
 LDFLAGS=-lm
 
+# The root for /sys and /dev needs to be moved in docker, this should stay empty in most cases
+FSROOT=""
+
+# enable VERBOSE if VERBOSE=1
+ifeq ($(VERBOSE),1)
+	CFLAGS+=-DVERBOSE
+endif
+
+ifdef FSROOT
+	CFLAGS+=-D_FSROOT=$(FSROOT)
+endif
+
 BUILD_DIR=./objects
 BIN=jsfw
 

client.c

@@ -103,6 +103,8 @@ static const JSONAdapter ConfigAdapter = {
     .size       = sizeof(ClientConfig),
 };
 
+static void print_config() __attribute__((unused));
+
 // Print the current config, for debugging purposes
 static void print_config() {
     printf("CLIENT: Config\n");
@@ -282,7 +284,7 @@ void setup_devices(void) {
     no_info.code              = NoMessage;
 
     for (int i = 0; i < config.slot_count; i++) {
-        int fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
+        int fd = open(FSROOT "/dev/uinput", O_WRONLY | O_NONBLOCK);
         if (fd < 0) {
             perror("CLIENT: Can't open /dev/uinput, aborting now");
             exit(1);

const.h

@@ -4,6 +4,14 @@
 #include <stdint.h>
 #include <time.h>
 
+#ifndef _FSROOT
+#define FSROOT ""
+#else
+#define __str(a) #a
+#define _str(a) __str(a)
+#define FSROOT _str(_FSROOT)
+#endif
+
 extern const struct timespec POLL_DEVICE_INTERVAL;
 extern const int             REQUEST_TIMEOUT;
 extern const char           *DEVICE_DEFAULT_NAME;

hid.c

@@ -281,7 +281,7 @@ uint64_t parse_event_name(const char *event) { return atol(event + 5); }
 // Find all available devices and pick up on new ones
 void poll_devices(void) {
     // loop over all entries of /sys/class/input
-    DIR           *input_dir = opendir("/sys/class/input");
+    DIR           *input_dir = opendir(FSROOT "/sys/class/input");
     struct dirent *input;
 
     while ((input = readdir(input_dir)) != NULL) {
@@ -298,7 +298,7 @@ void poll_devices(void) {
         // Open /dev/input/eventXX
         {
             char event_path[64];
-            snprintf(event_path, 64, "/dev/input/%s", input->d_name);
+            snprintf(event_path, 64, FSROOT "/dev/input/%s", input->d_name);
 
             dev.event = open(event_path, O_RDONLY);
 
@@ -372,7 +372,7 @@ void poll_devices(void) {
             char hidraw_path[64];
             {
                 char hidraw_dir_path[256];
-                snprintf(hidraw_dir_path, 256, "/sys/class/input/%s/device/device/hidraw", input->d_name);
+                snprintf(hidraw_dir_path, 256, FSROOT "/sys/class/input/%s/device/device/hidraw", input->d_name);
 
                 DIR           *hidraw_dir = opendir(hidraw_dir_path);
                 struct dirent *hidraw     = NULL;
@@ -387,7 +387,7 @@ void poll_devices(void) {
                     goto skip;
                 }
 
-                snprintf(hidraw_path, 64, "/dev/%s", hidraw->d_name);
+                snprintf(hidraw_path, 64, FSROOT "/dev/%s", hidraw->d_name);
 
                 closedir(hidraw_dir);
             }

server.c

@@ -88,6 +88,8 @@ static sigset_t      empty_sigset;
     if (sigaction(sig, &(struct sigaction){{SIG_IGN}}, NULL) != 0)                                                               \
     printf("SERVER:  can't ignore " #sig ".\n")
 
+static void print_config() __attribute__((unused));
+
 static void print_config() {
     printf("SERVER: Config\n");
     printf("  retry_delay: %fs\n", (double)(config.request_timeout) / 1000.0);