During initialization, print messages for fatal errors

Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>

src/curl.c

@@ -57,11 +57,13 @@ int swupd_curl_init(void)
 
 	curl_ret = curl_global_init(CURL_GLOBAL_ALL);
 	if (curl_ret != CURLE_OK) {
+		printf("Error: failed to initialize CURL environment\n");
 		return -1;
 	}
 
 	curl = curl_easy_init();
 	if (curl == NULL) {
+		printf("Error: failed to initialize CURL session\n");
 		curl_global_cleanup();
 		return -1;
 	}

src/helpers.c

@@ -170,6 +170,7 @@ int create_required_dirs(void)
 			string_or_die(&cmd, "mkdir -p %s/%s", state_dir, dirs[i]);
 			ret = system(cmd);
 			if (ret) {
+				printf("Error: failed to create %s/%s\n", state_dir, dirs[i]);
 				return -1;
 			}
 			free(cmd);
@@ -177,6 +178,7 @@ int create_required_dirs(void)
 			string_or_die(&dir, "%s/%s", state_dir, dirs[i]);
 			ret = chmod(dir, S_IRWXU);
 			if (ret) {
+				printf("Error: failed to set mode for %s/%s\n", state_dir, dirs[i]);
 				return -1;
 			}
 			free(dir);
@@ -185,6 +187,7 @@ int create_required_dirs(void)
 		// chmod 700
 		ret = chmod(state_dir, S_IRWXU);
 		if (ret) {
+			printf("Error: failed to set mode for state dir (%s)\n", state_dir);
 			return -1;
 		}
 	}

src/lock.c

@@ -59,18 +59,22 @@ int p_lockfile(void)
 
 	/* open lock file */
 	lock_fd = open(lockfile, O_RDWR | O_CREAT | O_CLOEXEC, 0600);
-	free(lockfile);
 
 	if (lock_fd < 0) {
+		printf("Error: failed to open %s: %s\n", lockfile, strerror(errno));
+		free(lockfile);
 		return -1;
 	}
 
+	free(lockfile);
+
 	/* try to get an advisory region lock for the file */
 	ret = fcntl(lock_fd, F_SETLK, &fl);
 	if (ret == -1) {
 		if ((errno == EAGAIN) || (errno == EACCES)) {
 			ret = -EAGAIN;
 		}
+		printf("Error: cannot acquire lock file. Another swupd process is already running.\n");
 		close(lock_fd);
 		return ret;
 	} else {