fixed gcc warnings that call returns not checked

modified:   src/collect/collect.c
modified:   src/udev/udev-node.c
modified:   src/udev/udevadm-settle.c
modified:   src/udev/udevd.c

3 files changed, 15 insertions, 4 deletions

diff --git a/src/udev/udev-node.c b/src/udev/udev-node.c
index 200e24fb41..2dddc7b4b4 100644
--- a/src/udev/udev-node.c
+++ b/src/udev/udev-node.c
@@ -286,8 +286,13 @@ static int node_permissions_apply(struct udev_device *dev, bool apply,
 
                 if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
                         log_debug("set permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
-                        chmod(devnode, mode);
-                        chown(devnode, uid, gid);
+                        ;
+                        if((chmod(devnode, mode) !=0 ) || (chown(devnode, uid,gid) !=0)) {
+				                err = -errno;  
+                                log_error("FAILED to set permissions %s, %#o, uid=%u, gid=%u"
+								          ,devnode, mode, uid, gid);
+								goto out;
+						}
                 } else {
                         log_debug("preserve permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
                 }
diff --git a/src/udev/udevadm-settle.c b/src/udev/udevadm-settle.c
index 9eeeab8f14..9ae6c6bf8e 100644
--- a/src/udev/udevadm-settle.c
+++ b/src/udev/udevadm-settle.c
@@ -201,7 +201,10 @@ static int adm_settle(struct udev *udev, int argc, char *argv[])
                         if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) {
                                 char buf[sizeof(struct inotify_event) + PATH_MAX];
 
-                                read(pfd[0].fd, buf, sizeof(buf));
+                                if(read(pfd[0].fd, buf, sizeof(buf)) < 0){
+								        log_error("failed to read /run/udev");
+										goto out;
+								}
                         }
                 } else {
                         sleep(1);
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index 850e4f5ef6..03de852c02 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -1031,7 +1031,10 @@ int main(int argc, char *argv[])
         }
 
         /* set umask before creating any file/directory */
-        chdir("/");
+        if(chdir("/")!= 0) {
+                log_error("unable to change into directory '/'");
+                goto exit;
+        }
         umask(022);
 
         mkdir("/run/udev", 0755);