[PATCH] debug messages improvements

[Lukáš Hrázký <lhrazky@xxxxxxxxxx>]

---
 src/vdagent/get-xrandr-output.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/vdagent/get-xrandr-output.c b/src/vdagent/get-xrandr-output.c
index 2127e66..14e781d 100644
--- a/src/vdagent/get-xrandr-output.c
+++ b/src/vdagent/get-xrandr-output.c
@@ -64,7 +64,7 @@ static const char *connections[] = {"", "*CONNECTED*", "disconnected", "unknown
 int main(int argc, char* argv[])
 {
     if (argc < 3) {
-        ERROR("Usage: %s PCIADDR MONITORID", argv[0]);
+        ERROR("Usage: %s PCIADDR MONITORID\n", argv[0]);
     }
 
     // PCI address should be in extended BDF notation
@@ -82,6 +82,7 @@ int main(int argc, char* argv[])
         snprintf(dev_path, sizeof(dev_path), DRM_DEV_NAME, DRM_DIR_NAME, i);
         if (stat(dev_path, &buf) != 0) {
             // no card exists, exit loop
+            ERROR("no card exists\n");
             break;
         }
 
@@ -89,15 +90,17 @@ int main(int argc, char* argv[])
         // pci address for the device
         char sys_path[64];
         snprintf(sys_path, sizeof(sys_path), "/sys/class/drm/card%d", i);
+        printf("sys path: %s\n", sys_path);
 
         // the file /sys/class/drm/card0/device is a symlink to a file that
         // specifies the device's address. It usually points to something
         // like ../../../0000:00:02.0
         char sys_path_device[100], device_link[100];
         snprintf(sys_path_device, sizeof(sys_path_device), "%s/device", sys_path);
+        printf("sys path device: %s\n", sys_path_device);
         ssize_t res = readlink(sys_path_device, device_link, sizeof(device_link) - 1);
         if (res == -1) {
-            ERROR(strerror(errno));
+            ERROR("readlink error: %s\n", strerror(errno));
         }
         // readlink does not guarantee that the string is null-terminated
         device_link[res] = '\0';
@@ -114,18 +117,18 @@ int main(int argc, char* argv[])
             int fd;
             fd = open(dev_path, O_RDWR);
             if (fd < 0) {
-                ERROR(strerror(errno));
+                ERROR("open error: %s\n", strerror(errno));
             }
 
             drmModeResPtr res = drmModeGetResources(fd);
             if (!res) {
-                ERROR("Unable to get resources for card");
+                ERROR("Unable to get resources for card\n");
             }
 
             // find the drm output that is equal to monitor_id
             /* FIXME: verify that monitor id is 0-based */
             if (res->count_connectors < (monitor_id + 1)) {
-                ERROR("Unable to find output");
+                ERROR("Unable to find output\n");
             }
 
             drmModeConnectorPtr conn = drmModeGetConnector(fd, res->connectors[monitor_id]);
@@ -143,17 +146,17 @@ int main(int argc, char* argv[])
             // now look up all xrandr outputs
             Display *xdisplay = XOpenDisplay(NULL);
             if (!xdisplay) {
-                ERROR("Failed to open X dislay");
+                ERROR("Failed to open X dislay\n");
             }
 
             int rr_event_base, rr_error_base;
             if (!XRRQueryExtension(xdisplay, &rr_event_base, &rr_error_base)) {
-                ERROR("Failed to initialize XRandr extension");
+                ERROR("Failed to initialize XRandr extension\n");
             }
 
             XRRScreenResources *xres = XRRGetScreenResourcesCurrent(xdisplay, DefaultRootWindow(xdisplay));
             if (!xres) {
-                ERROR("Unable to get screen resources");
+                ERROR("Unable to get screen resources\n");
             }
 
             // Loop through xrandr outputs and check whether the xrandr
@@ -178,7 +181,7 @@ int main(int argc, char* argv[])
                     char *id_pos = strrchr(oinfo->name, '-') + 1;
                     int newid = atoi(id_pos) + 1;
                     if (snprintf(xname, sizeof(xname), "%s%i", oinfo->name, newid) < 0) {
-                        ERROR("Unable to increment name");
+                        ERROR("Unable to increment name\n");
                     }
                 } else {
                     strncpy(xname, oinfo->name, sizeof(xname) - 1);
@@ -200,6 +203,8 @@ int main(int argc, char* argv[])
             // we found the right card, abort the loop
             found = true;
             break;
+        } else {
+            printf("card addr '%s' does not match requested addr '%s'\n", card_addr, user_addr);
         }
     }
     if (!found) {
-- 
2.19.1

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