Index: uspace/app/bdsh/cmds/modules/bdd/bdd.c
===================================================================
--- uspace/app/bdsh/cmds/modules/bdd/bdd.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/bdsh/cmds/modules/bdd/bdd.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -30,4 +30,5 @@
 #include <stdlib.h>
 #include <str.h>
+#include <sys/typefmt.h>
 #include "config.h"
 #include "util.h"
@@ -122,5 +123,5 @@
 		rc = block_read_direct(handle, ba, 1, blk);
 		if (rc != EOK) {
-			printf("%s: Error reading block %llu\n", cmdname, ba);
+			printf("%s: Error reading block %" PRIuOFF64 "\n", cmdname, ba);
 			free(blk);
 			block_fini(handle);
Index: uspace/app/bdsh/cmds/modules/cp/cp.c
===================================================================
--- uspace/app/bdsh/cmds/modules/cp/cp.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/bdsh/cmds/modules/cp/cp.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -95,5 +95,5 @@
 
 	if (vb)
-		printf("%d bytes to copy\n", total);
+		printf("%" PRIu64 " bytes to copy\n", total);
 
 	lseek(fd1, 0, SEEK_SET);
@@ -130,5 +130,5 @@
 		 */
 		if (res != 0) {
-			printf("\n%d more bytes than actually exist were copied\n", res);
+			printf("\n%zd more bytes than actually exist were copied\n", res);
 			goto err;
 		}
@@ -187,5 +187,5 @@
 			return CMD_SUCCESS;
 		case 'v':
-			printf("%d\n", CP_VERSION);
+			printf("%s\n", CP_VERSION);
 			return CMD_SUCCESS;
 		case 'V':
@@ -223,5 +223,5 @@
 
 	if (verbose)
-		printf("%d bytes copied\n", ret);
+		printf("%" PRId64 " bytes copied\n", ret);
 
 	if (ret >= 0)
Index: uspace/app/bdsh/cmds/modules/mkfile/mkfile.c
===================================================================
--- uspace/app/bdsh/cmds/modules/mkfile/mkfile.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/bdsh/cmds/modules/mkfile/mkfile.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -168,5 +168,5 @@
 		rc = write(fd, buffer, to_write);
 		if (rc <= 0) {
-			printf("%s: Error writing file (%d).\n", cmdname, rc);
+			printf("%s: Error writing file (%zd).\n", cmdname, rc);
 			close(fd);
 			return CMD_FAILURE;
@@ -177,5 +177,5 @@
 	rc = close(fd);
 	if (rc != 0) {
-		printf("%s: Error writing file (%d).\n", cmdname, rc);
+		printf("%s: Error writing file (%zd).\n", cmdname, rc);
 		return CMD_FAILURE;
 	}
Index: uspace/app/bdsh/cmds/modules/unmount/unmount.c
===================================================================
--- uspace/app/bdsh/cmds/modules/unmount/unmount.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/bdsh/cmds/modules/unmount/unmount.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -47,5 +47,5 @@
 	} else {
 		help_cmd_unmount(HELP_SHORT);
-		printf("Usage:  %s <mp>\n", cmdname);
+		printf("Usage: %s <mp>\n", cmdname);
 	}
 	return;
@@ -68,5 +68,5 @@
 	rc = unmount(argv[1]);
 	if (rc != EOK) {
-		printf("Unable to unmount %s (rc=%d)\n", argv[1]);
+		printf("Unable to unmount %s (rc=%d)\n", argv[1], rc);
 		return CMD_FAILURE;
 	}
Index: uspace/app/bdsh/exec.c
===================================================================
--- uspace/app/bdsh/exec.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/bdsh/exec.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -133,5 +133,6 @@
 	rc = task_wait(tid, &texit, &retval);
 	if (rc != EOK) {
-		printf("%s: Failed waiting for command (%s)\n", str_error(rc));
+		printf("%s: Failed waiting for command (%s)\n", progname,
+		    str_error(rc));
 	} else if (texit != TASK_EXIT_NORMAL) {
 		printf("%s: Command failed (unexpectedly terminated)\n", progname);
Index: uspace/app/edit/edit.c
===================================================================
--- uspace/app/edit/edit.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/edit/edit.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -781,5 +781,5 @@
 			c = str_decode(row_buf, &pos, size);
 			if (c != '\t') {
-				printf("%lc", c);
+				printf("%lc", (wint_t) c);
 				s_column += 1;
 			} else {
@@ -830,5 +830,7 @@
 	int n = printf(" %d, %d: File '%s'. Ctrl-Q Quit  Ctrl-S Save  "
 	    "Ctrl-E Save As", coord.row, coord.column, fname);
-	printf("%*s", scr_columns - 1 - n, "");
+	
+	int pos = scr_columns - 1 - n;
+	printf("%*s", pos, "");
 	fflush(stdout);
 	console_set_style(con, STYLE_NORMAL);
@@ -1153,5 +1155,7 @@
 	console_set_pos(con, 0, scr_rows - 1);
 	console_set_style(con, STYLE_INVERTED);
-	printf(" %*s ", -(scr_columns - 3), str);
+	
+	int pos = -(scr_columns - 3);
+	printf(" %*s ", pos, str);
 	fflush(stdout);
 	console_set_style(con, STYLE_NORMAL);
Index: uspace/app/netecho/netecho.c
===================================================================
--- uspace/app/netecho/netecho.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/netecho/netecho.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -220,5 +220,5 @@
 	// check the buffer size
 	if (size <= 0) {
-		fprintf(stderr, "Receive size too small (%d). Using 1024 bytes instead.\n", size);
+		fprintf(stderr, "Receive size too small (%zu). Using 1024 bytes instead.\n", size);
 		size = 1024;
 	}
@@ -262,5 +262,5 @@
 		// check the backlog
 		if (backlog <= 0) {
-			fprintf(stderr, "Accepted sockets queue size too small (%d). Using 3 instead.\n", size);
+			fprintf(stderr, "Accepted sockets queue size too small (%zu). Using 3 instead.\n", size);
 			backlog = 3;
 		}
@@ -325,5 +325,6 @@
 						break;
 					default:
-						fprintf(stderr, "Address family %d (0x%X) is not supported.\n", address->sa_family);
+						fprintf(stderr, "Address family %u (%#x) is not supported.\n",
+						    address->sa_family, address->sa_family);
 					}
 					// parse the source address
@@ -334,5 +335,6 @@
 						} else {
 							data[length] = '\0';
-							printf("Socket %d received %d bytes from %s:%d\n%s\n", socket_id, length, address_string, port, data);
+							printf("Socket %d received %zu bytes from %s:%d\n%s\n",
+							    socket_id, length, address_string, port, data);
 						}
 					}
Index: uspace/app/nettest1/nettest1.c
===================================================================
--- uspace/app/nettest1/nettest1.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/nettest1/nettest1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -356,5 +356,5 @@
 	/* Check data buffer size */
 	if (size <= 0) {
-		fprintf(stderr, "Data buffer size too small (%d). Using 1024 "
+		fprintf(stderr, "Data buffer size too small (%zu). Using 1024 "
 		    "bytes instead.\n", size);
 		size = 1024;
@@ -410,5 +410,5 @@
 	}
 
-	printf("Tested in %d microseconds\n", tv_sub(&time_after,
+	printf("Tested in %ld microseconds\n", tv_sub(&time_after,
 	    &time_before));
 
Index: uspace/app/nettest2/nettest2.c
===================================================================
--- uspace/app/nettest2/nettest2.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/nettest2/nettest2.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -302,5 +302,5 @@
 	/* Check data buffer size. */
 	if (size <= 0) {
-		fprintf(stderr, "Data buffer size too small (%d). Using 1024 "
+		fprintf(stderr, "Data buffer size too small (%zu). Using 1024 "
 		    "bytes instead.\n", size);
 		size = 1024;
@@ -375,5 +375,5 @@
 		printf("\tOK\n");
 
-	printf("sendto + recvfrom tested in %d microseconds\n",
+	printf("sendto + recvfrom tested in %ld microseconds\n",
 	    tv_sub(&time_after, &time_before));
 
@@ -403,5 +403,5 @@
 		printf("\tOK\n");
 
-	printf("sendto, recvfrom tested in %d microseconds\n",
+	printf("sendto, recvfrom tested in %ld microseconds\n",
 	    tv_sub(&time_after, &time_before));
 
Index: uspace/app/ping/ping.c
===================================================================
--- uspace/app/ping/ping.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/ping/ping.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -337,5 +337,5 @@
 	}
 	
-	printf("PING %s (%s) %u(%u) bytes of data\n", config.dest_addr,
+	printf("PING %s (%s) %zu(%zu) bytes of data\n", config.dest_addr,
 	    config.dest_str, config.size, config.size);
 	
@@ -378,9 +378,9 @@
 		switch (result) {
 		case ICMP_ECHO:
-			printf("%u bytes from ? (?): icmp_seq=%u ttl=? time=%u.%04u\n",
+			printf("%zu bytes from ? (?): icmp_seq=%u ttl=? time=%ld.%04ld\n",
 				config.size, seq, elapsed / 1000, elapsed % 1000);
 			break;
 		case ETIMEOUT:
-			printf("%u bytes from ? (?): icmp_seq=%u Timed out\n",
+			printf("%zu bytes from ? (?): icmp_seq=%u Timed out\n",
 				config.size, seq);
 			break;
Index: uspace/app/redir/redir.c
===================================================================
--- uspace/app/redir/redir.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/redir/redir.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -78,5 +78,5 @@
 {
 	const char **args;
-	task_id_t id;
+	task_id_t id = 0;
 	int rc;
 
Index: uspace/app/stats/stats.c
===================================================================
--- uspace/app/stats/stats.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/stats/stats.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -56,10 +56,12 @@
 	
 	uint64_t sec = time.tv_sec;
-	printf("%02" PRIu64 ":%02" PRIu64 ":%02" PRIu64, (sec % DAY) / HOUR,
-	    (sec % HOUR) / MINUTE, sec % MINUTE);
+	printf("%02" PRIu64 ":%02" PRIu64 ":%02" PRIu64,
+	    (sec % DAY) / HOUR, (sec % HOUR) / MINUTE, sec % MINUTE);
 	
 	sysarg_t uptime = stats_get_uptime();
-	printf(", up %u days, %u hours, %u minutes, %u seconds", uptime / DAY,
-	    (uptime % DAY) / HOUR, (uptime % HOUR) / MINUTE, uptime % MINUTE);
+	printf(", up %" PRIun " days, %" PRIun " hours, "
+	    "%" PRIun " minutes, %" PRIun " seconds",
+	    uptime / DAY, (uptime % DAY) / HOUR,
+	    (uptime % HOUR) / MINUTE, uptime % MINUTE);
 	
 	size_t count;
Index: uspace/app/taskdump/taskdump.c
===================================================================
--- uspace/app/taskdump/taskdump.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/taskdump/taskdump.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -85,5 +85,5 @@
 	rc = connect_task(task_id);
 	if (rc < 0) {
-		printf("Failed connecting to task %" PRIdTASKID ".\n", task_id);
+		printf("Failed connecting to task %" PRIu64 ".\n", task_id);
 		return 1;
 	}
@@ -92,5 +92,5 @@
 	app_symtab = NULL;
 
-	printf("Dumping task '%s' (task ID %" PRIdTASKID ").\n", app_name, task_id);
+	printf("Dumping task '%s' (task ID %" PRIu64 ").\n", app_name, task_id);
 	autoload_syms();
 	putchar('\n');
@@ -126,5 +126,5 @@
 	if (rc < 0) {
 		printf("Error connecting\n");
-		printf("ipc_connect_task(%" PRIdTASKID ") -> %d ", task_id, rc);
+		printf("ipc_connect_task(%" PRIu64 ") -> %d ", task_id, rc);
 		return rc;
 	}
@@ -168,5 +168,5 @@
 				core_file_name = *argv;
 			} else {
-				printf("Uknown option '%s'\n", arg[0]);
+				printf("Uknown option '%c'\n", arg[0]);
 				print_syntax();
 				return -1;
@@ -240,5 +240,5 @@
 	printf("Threads:\n");
 	for (i = 0; i < n_threads; i++) {
-		printf(" [%d] hash: %p\n", 1+i, thash_buf[i]);
+		printf(" [%zu] hash: %p\n", 1 + i, (void *) thash_buf[i]);
 
 		thread_dump(thash_buf[i]);
@@ -284,10 +284,10 @@
 	printf("Address space areas:\n");
 	for (i = 0; i < n_areas; i++) {
-		printf(" [%d] flags: %c%c%c%c base: %p size: %p\n", 1+i,
+		printf(" [%zu] flags: %c%c%c%c base: %p size: %zu\n", 1 + i,
 		    (ainfo_buf[i].flags & AS_AREA_READ) ? 'R' : '-',
 		    (ainfo_buf[i].flags & AS_AREA_WRITE) ? 'W' : '-',
 		    (ainfo_buf[i].flags & AS_AREA_EXEC) ? 'X' : '-',
 		    (ainfo_buf[i].flags & AS_AREA_CACHEABLE) ? 'C' : '-',
-		    ainfo_buf[i].start_addr, ainfo_buf[i].size);
+		    (void *) ainfo_buf[i].start_addr, ainfo_buf[i].size);
 	}
 
@@ -326,5 +326,6 @@
 
 	sym_pc = fmt_sym_address(pc);
-	printf("Thread %p crashed at %s. FP = %p\n", thash, sym_pc, fp);
+	printf("Thread %p crashed at %s. FP = %p\n", (void *) thash,
+	    sym_pc, (void *) fp);
 	free(sym_pc);
 
@@ -334,5 +335,5 @@
 	while (stacktrace_fp_valid(&st, fp)) {
 		sym_pc = fmt_sym_address(pc);
-		printf("  %p: %s\n", fp, sym_pc);
+		printf("  %p: %s\n", (void *) fp, sym_pc);
 		free(sym_pc);
 
@@ -457,7 +458,7 @@
 
 	if (rc == EOK) {
-		rc = asprintf(&str, "%p (%s+%p)", addr, name, offs);
+		rc = asprintf(&str, "%p (%s+%zu)", (void *) addr, name, offs);
 	} else {
-		rc = asprintf(&str, "%p", addr);
+		rc = asprintf(&str, "%p", (void *) addr);
 	}
 
Index: uspace/app/tasks/tasks.c
===================================================================
--- uspace/app/tasks/tasks.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tasks/tasks.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -77,5 +77,5 @@
 		order_suffix(stats_tasks[i].kcycles, &kcycles, &ksuffix);
 		
-		printf("%8" PRIu64 "%8u %8" PRIu64"%c %12"
+		printf("%8" PRIu64 "%8zu %8" PRIu64 "%c %12"
 		    PRIu64 "%c %12" PRIu64 "%c %s\n", stats_tasks[i].task_id,
 		    stats_tasks[i].threads, virtmem, vmsuffix, ucycles, usuffix,
@@ -160,5 +160,5 @@
 	}
 	
-	printf("%s: %u CPU(s) detected\n", NAME, count);
+	printf("%s: %zu CPU(s) detected\n", NAME, count);
 	
 	size_t i;
Index: uspace/app/test_serial/Makefile
===================================================================
--- uspace/app/test_serial/Makefile	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ 	(revision )
@@ -1,36 +1,0 @@
-#
-# Copyright (c) 2005 Martin Decky
-# Copyright (c) 2007 Jakub Jermar
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# - Redistributions of source code must retain the above copyright
-#   notice, this list of conditions and the following disclaimer.
-# - Redistributions in binary form must reproduce the above copyright
-#   notice, this list of conditions and the following disclaimer in the
-#   documentation and/or other materials provided with the distribution.
-# - The name of the author may not be used to endorse or promote products
-#   derived from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-
-USPACE_PREFIX = ../..
-BINARY = test_serial
-
-SOURCES = \
-	test_serial.c
-
-include $(USPACE_PREFIX)/Makefile.common
Index: uspace/app/test_serial/test_serial.c
===================================================================
--- uspace/app/test_serial/test_serial.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ 	(revision )
@@ -1,166 +1,0 @@
-/*
- * Copyright (c) 2009 Lenka Trochtova
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup test_serial
- * @brief	test the serial port driver - read from the serial port
- * @{
- */
-/**
- * @file
- */
-
-#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <ipc/ipc.h>
-#include <sys/types.h>
-#include <async.h>
-#include <ipc/services.h>
-#include <ipc/devman.h>
-#include <devman.h>
-#include <device/char.h>
-#include <str.h>
-#include <ipc/serial_ctl.h>
-
-#define NAME 		"test serial"
-
-
-static void print_usage(void)
-{
-	printf("Usage: \n test_serial count \n where count is the number of "
-	    "characters to be read\n");
-}
-
-int main(int argc, char *argv[])
-{
-	if (argc != 2) {
-		printf(NAME ": incorrect number of arguments.\n");
-		print_usage();
-		return 0;
-	}
-	
-	long int cnt = strtol(argv[1], NULL, 10);
-	
-	int res;
-	res = devman_get_phone(DEVMAN_CLIENT, IPC_FLAG_BLOCKING);
-	devman_handle_t handle;
-	
-	res = devman_device_get_handle("/hw/pci0/00:01.0/com1", &handle,
-	    IPC_FLAG_BLOCKING);
-	if (EOK != res) {
-		printf(NAME ": could not get the device handle, errno = %d.\n",
-		    -res);
-		return 1;
-	}
-	
-	printf(NAME ": trying to read %d characters from device with handle "
-	    "%d.\n", cnt, handle);
-	
-	int phone = devman_device_connect(handle, IPC_FLAG_BLOCKING);
-	if (0 > phone) {
-		printf(NAME ": could not connect to the device, errno = %d.\n",
-		    -res);
-		devman_hangup_phone(DEVMAN_CLIENT);
-		return 2;
-	}
-	
-	char *buf = (char *) malloc(cnt + 1);
-	if (NULL == buf) {
-		printf(NAME ": failed to allocate the input buffer\n");
-		ipc_hangup(phone);
-		devman_hangup_phone(DEVMAN_CLIENT);
-		return 3;
-	}
-	
-	ipcarg_t old_baud, old_par, old_stop, old_word_size;
-	
-	res = ipc_call_sync_0_4(phone, SERIAL_GET_COM_PROPS, &old_baud,
-	    &old_par, &old_word_size, &old_stop);
-	if (EOK != res) {
-		printf(NAME ": failed to get old communication parameters, "
-		    "errno = %d.\n", -res);
-		devman_hangup_phone(DEVMAN_CLIENT);
-		ipc_hangup(phone);
-		free(buf);
-		return 4;
-	}
-	
-	res = ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, 1200,
-	    SERIAL_NO_PARITY, 8, 1);
-	if (EOK != res) {
-		printf(NAME ": failed to set communication parameters, errno = "
-		    "%d.\n", -res);
-		devman_hangup_phone(DEVMAN_CLIENT);
-		ipc_hangup(phone);
-		free(buf);
-		return 4;
-	}
-	
-	int total = 0;
-	int read = 0;
-	while (total < cnt) {
-		read = read_dev(phone, buf, cnt - total);
-		if (0 > read) {
-			printf(NAME ": failed read from device, errno = %d.\n",
-			    -read);
-			ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
-			    old_par, old_word_size, old_stop);
-			ipc_hangup(phone);
-			devman_hangup_phone(DEVMAN_CLIENT);
-			free(buf);
-			return 5;
-		}
-		total += read;
-		if (read > 0) {
-			buf[read] = 0;
-			printf(buf);
-			/*
-			 * Write data back to the device to test the opposite
-			 * direction of data transfer.
-			 */
-			write_dev(phone, buf, read);
-		} else {
-			usleep(100000);
-		}	
-	}
-	
-	const char *the_end = "\n---------\nTHE END\n---------\n";
-	write_dev(phone, (void *)the_end, str_size(the_end));
-	
-	/* restore original communication settings */
-	ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud, old_par,
-	    old_word_size, old_stop);
-	devman_hangup_phone(DEVMAN_CLIENT);
-	ipc_hangup(phone);
-	free(buf);
-	
-	return 0;
-}
-
-/** @}
- */
Index: uspace/app/tester/Makefile
===================================================================
--- uspace/app/tester/Makefile	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/Makefile	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -38,4 +38,5 @@
 	print/print3.c \
 	print/print4.c \
+	print/print5.c \
 	console/console1.c \
 	stdio/stdio1.c \
@@ -49,5 +50,6 @@
 	ipc/connect.c \
 	loop/loop1.c \
-	mm/malloc1.c
+	mm/malloc1.c \
+	hw/serial/serial1.c
 
 include $(USPACE_PREFIX)/Makefile.common
Index: uspace/app/tester/hw/serial/serial1.c
===================================================================
--- uspace/app/tester/hw/serial/serial1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
+++ uspace/app/tester/hw/serial/serial1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2009 Lenka Trochtova
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup tester
+ * @brief Test the serial port driver - loopback test
+ * @{
+ */
+/**
+ * @file
+ */
+
+#include <inttypes.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ipc/ipc.h>
+#include <sys/types.h>
+#include <async.h>
+#include <ipc/services.h>
+#include <ipc/devman.h>
+#include <devman.h>
+#include <device/char.h>
+#include <str.h>
+#include <ipc/serial_ctl.h>
+#include "../../tester.h"
+
+#define DEFAULT_COUNT  1024
+#define DEFAULT_SLEEP  100000
+#define EOT            "####> End of transfer <####\n"
+
+const char *test_serial1(void)
+{
+	size_t cnt;
+	
+	if (test_argc < 1)
+		cnt = DEFAULT_COUNT;
+	else
+		switch (str_size_t(test_argv[0], NULL, 0, true, &cnt)) {
+		case EOK:
+			break;
+		case EINVAL:
+			return "Invalid argument, unsigned integer expected";
+		case EOVERFLOW:
+			return "Argument size overflow";
+		default:
+			return "Unexpected argument error";
+		}
+	
+	int res = devman_get_phone(DEVMAN_CLIENT, IPC_FLAG_BLOCKING);
+	
+	devman_handle_t handle;
+	res = devman_device_get_handle("/hw/pci0/00:01.0/com1", &handle,
+	    IPC_FLAG_BLOCKING);
+	if (res != EOK)
+		return "Could not get serial device handle";
+	
+	int phone = devman_device_connect(handle, IPC_FLAG_BLOCKING);
+	if (phone < 0) {
+		devman_hangup_phone(DEVMAN_CLIENT);
+		return "Unable to connect to serial device";
+	}
+	
+	char *buf = (char *) malloc(cnt + 1);
+	if (buf == NULL) {
+		ipc_hangup(phone);
+		devman_hangup_phone(DEVMAN_CLIENT);
+		return "Failed to allocate input buffer";
+	}
+	
+	ipcarg_t old_baud;
+	ipcarg_t old_par;
+	ipcarg_t old_stop;
+	ipcarg_t old_word_size;
+	
+	res = ipc_call_sync_0_4(phone, SERIAL_GET_COM_PROPS, &old_baud,
+	    &old_par, &old_word_size, &old_stop);
+	if (res != EOK) {
+		free(buf);
+		ipc_hangup(phone);
+		devman_hangup_phone(DEVMAN_CLIENT);
+		return "Failed to get old serial communication parameters";
+	}
+	
+	res = ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, 1200,
+	    SERIAL_NO_PARITY, 8, 1);
+	if (EOK != res) {
+		free(buf);
+		ipc_hangup(phone);
+		devman_hangup_phone(DEVMAN_CLIENT);
+		return "Failed to set serial communication parameters";
+	}
+	
+	TPRINTF("Trying to read %zu characters from serial device "
+	    "(handle=%" PRIun ")\n", cnt, handle);
+	
+	size_t total = 0;
+	while (total < cnt) {
+		ssize_t read = read_dev(phone, buf, cnt - total);
+		
+		if (read < 0) {
+			ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
+			    old_par, old_word_size, old_stop);
+			free(buf);
+			ipc_hangup(phone);
+			devman_hangup_phone(DEVMAN_CLIENT);
+			return "Failed read from serial device";
+		}
+		
+		if ((size_t) read > cnt - total) {
+			ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
+			    old_par, old_word_size, old_stop);
+			free(buf);
+			ipc_hangup(phone);
+			devman_hangup_phone(DEVMAN_CLIENT);
+			return "Read more data than expected";
+		}
+		
+		TPRINTF("Read %zd bytes\n", read);
+		
+		if (read == 0)
+			usleep(DEFAULT_SLEEP);
+		else {
+			buf[read] = 0;
+			
+			/*
+			 * Write data back to the device to test the opposite
+			 * direction of data transfer.
+			 */
+			ssize_t written = write_dev(phone, buf, read);
+			
+			if (written < 0) {
+				ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
+				    old_par, old_word_size, old_stop);
+				free(buf);
+				ipc_hangup(phone);
+				devman_hangup_phone(DEVMAN_CLIENT);
+				return "Failed write to serial device";
+			}
+			
+			if (written != read) {
+				ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
+				    old_par, old_word_size, old_stop);
+				free(buf);
+				ipc_hangup(phone);
+				devman_hangup_phone(DEVMAN_CLIENT);
+				return "Written less data than read from serial device";
+			}
+			
+			TPRINTF("Written %zd bytes\n", written);
+		}
+		
+		total += read;
+	}
+	
+	TPRINTF("Trying to write EOT banner to the serial device\n");
+	
+	size_t eot_size = str_size(EOT);
+	ssize_t written = write_dev(phone, (void *) EOT, eot_size);
+	
+	ipc_call_sync_4_0(phone, SERIAL_SET_COM_PROPS, old_baud,
+	    old_par, old_word_size, old_stop);
+	free(buf);
+	ipc_hangup(phone);
+	devman_hangup_phone(DEVMAN_CLIENT);
+	
+	if (written < 0)
+		return "Failed to write EOT banner to serial device";
+	
+	if ((size_t) written != eot_size)
+		return "Written less data than the size of the EOT banner "
+		    "to serial device";
+	
+	return NULL;
+}
+
+/** @}
+ */
Index: uspace/app/tester/hw/serial/serial1.def
===================================================================
--- uspace/app/tester/hw/serial/serial1.def	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
+++ uspace/app/tester/hw/serial/serial1.def	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -0,0 +1,6 @@
+{
+	"serial1",
+	"Serial loopback test",
+	&test_serial1,
+	false
+},
Index: uspace/app/tester/ipc/ping_pong.c
===================================================================
--- uspace/app/tester/ipc/ping_pong.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/ipc/ping_pong.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -72,5 +72,5 @@
 	}
 	
-	TPRINTF("OK\nCompleted %llu round trips in %u seconds, %llu rt/s.\n",
+	TPRINTF("OK\nCompleted %" PRIu64 " round trips in %u seconds, %" PRIu64 " rt/s.\n",
 	    count, DURATION_SECS, count / DURATION_SECS);
 	
Index: uspace/app/tester/ipc/register.c
===================================================================
--- uspace/app/tester/ipc/register.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/ipc/register.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -27,4 +27,5 @@
  */
 
+#include <inttypes.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -41,5 +42,5 @@
 	unsigned int i;
 	
-	TPRINTF("Connected phone %#x accepting\n", icall->in_phone_hash);
+	TPRINTF("Connected phone %" PRIun " accepting\n", icall->in_phone_hash);
 	ipc_answer_0(iid, EOK);
 	for (i = 0; i < MAX_CONNECTIONS; i++) {
@@ -57,14 +58,14 @@
 		switch (IPC_GET_METHOD(call)) {
 		case IPC_M_PHONE_HUNGUP:
-			TPRINTF("Phone %#x hung up\n", icall->in_phone_hash);
+			TPRINTF("Phone %" PRIun " hung up\n", icall->in_phone_hash);
 			retval = 0;
 			break;
 		case IPC_TEST_METHOD:
-			TPRINTF("Received well known message from %#x: %#x\n",
+			TPRINTF("Received well known message from %" PRIun ": %" PRIun "\n",
 			    icall->in_phone_hash, callid);
 			ipc_answer_0(callid, EOK);
 			break;
 		default:
-			TPRINTF("Received unknown message from %#x: %#x\n",
+			TPRINTF("Received unknown message from %" PRIun ": %" PRIun "\n",
 			    icall->in_phone_hash, callid);
 			ipc_answer_0(callid, ENOENT);
Index: uspace/app/tester/print/print1.c
===================================================================
--- uspace/app/tester/print/print1.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/print/print1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -49,8 +49,4 @@
 	TPRINTF("Real output:     \"%8.10s\"\n\n", "very long text");
 	
-	TPRINTF("Testing printf(\"%%s\", NULL):\n");
-	TPRINTF("Expected output: \"(NULL)\"\n");
-	TPRINTF("Real output:     \"%s\"\n\n", NULL);
-	
 	return NULL;
 }
Index: uspace/app/tester/print/print2.c
===================================================================
--- uspace/app/tester/print/print2.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/print/print2.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -33,7 +33,7 @@
 const char *test_print2(void)
 {
-	TPRINTF("Testing printf(\"%%c %%3.2c %%-3.2c %%2.3c %%-2.3c\", 'a', 'b', 'c', 'd', 'e'):\n");
-	TPRINTF("Expected output: [a] [  b] [c  ] [ d] [e ]\n");
-	TPRINTF("Real output:     [%c] [%3.2c] [%-3.2c] [%2.3c] [%-2.3c]\n\n", 'a', 'b', 'c', 'd', 'e');
+	TPRINTF("Testing printf(\"%%c\", 'a'):\n");
+	TPRINTF("Expected output: [a]\n");
+	TPRINTF("Real output:     [%c]\n\n", 'a');
 	
 	TPRINTF("Testing printf(\"%%d %%3.2d %%-3.2d %%2.3d %%-2.3d\", 1, 2, 3, 4, 5):\n");
Index: uspace/app/tester/print/print4.c
===================================================================
--- uspace/app/tester/print/print4.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/print/print4.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -45,5 +45,5 @@
 		TPRINTF("  ");
 		for (index = 0; index < 32; index++)
-			TPRINTF("%lc", (wchar_t) ((group << 5) + index));
+			TPRINTF("%lc", (wint_t) ((group << 5) + index));
 		
 		TPRINTF("\n");
@@ -57,5 +57,5 @@
 		uint8_t index;
 		for (index = 0; index < 32; index++)
-			TPRINTF("%lc", (wchar_t) ((group << 5) + index));
+			TPRINTF("%lc", (wint_t) ((group << 5) + index));
 		
 		TPRINTF("\n");
Index: uspace/app/tester/print/print5.c
===================================================================
--- uspace/app/tester/print/print5.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
+++ uspace/app/tester/print/print5.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2005 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This test tests several features of the HelenOS
+ * printf() implementation which go beyond the POSIX
+ * specification and GNU printf() behaviour.
+ *
+ * Therefore we disable printf() argument checking by
+ * the GCC compiler in this source file to avoid false
+ * positives.
+ *
+ */
+#define NVERIFY_PRINTF
+
+#include <stdio.h>
+#include <unistd.h>
+#include "../tester.h"
+
+const char *test_print5(void)
+{
+	TPRINTF("Testing printf(\"%%s\", NULL):\n");
+	TPRINTF("Expected output: \"(NULL)\"\n");
+	TPRINTF("Real output:     \"%s\"\n\n", (char *) NULL);
+	
+	TPRINTF("Testing printf(\"%%c %%3.2c %%-3.2c %%2.3c %%-2.3c\", 'a', 'b', 'c', 'd', 'e'):\n");
+	TPRINTF("Expected output: [a] [  b] [c  ] [ d] [e ]\n");
+	TPRINTF("Real output:     [%c] [%3.2c] [%-3.2c] [%2.3c] [%-2.3c]\n\n", 'a', 'b', 'c', 'd', 'e');
+	
+	return NULL;
+}
Index: uspace/app/tester/print/print5.def
===================================================================
--- uspace/app/tester/print/print5.def	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
+++ uspace/app/tester/print/print5.def	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -0,0 +1,6 @@
+{
+	"print1",
+	"String printf test",
+	&test_print1,
+	true
+},
Index: uspace/app/tester/stdio/stdio1.c
===================================================================
--- uspace/app/tester/stdio/stdio1.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/stdio/stdio1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -60,5 +60,5 @@
 	
 	buf[cnt] = '\0';
-	TPRINTF("Read %u bytes, string \"%s\"\n", cnt, buf);
+	TPRINTF("Read %zu bytes, string \"%s\"\n", cnt, buf);
 	
 	TPRINTF("Seek to beginning...");
Index: uspace/app/tester/tester.c
===================================================================
--- uspace/app/tester/tester.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/tester.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -51,4 +51,5 @@
 #include "print/print3.def"
 #include "print/print4.def"
+#include "print/print5.def"
 #include "console/console1.def"
 #include "stdio/stdio1.def"
@@ -63,4 +64,5 @@
 #include "loop/loop1.def"
 #include "mm/malloc1.def"
+#include "hw/serial/serial1.def"
 	{NULL, NULL, NULL, false}
 };
@@ -110,8 +112,15 @@
 	}
 	
+	unsigned int _len = (unsigned int) len;
+	if ((_len != len) || (((int) _len) < 0)) {
+		printf("Command length overflow\n");
+		return;
+	}
+	
 	for (test = tests; test->name != NULL; test++)
-		printf("%-*s %s%s\n", len, test->name, test->desc, (test->safe ? "" : " (unsafe)"));
+		printf("%-*s %s%s\n", _len, test->name, test->desc,
+		    (test->safe ? "" : " (unsafe)"));
 	
-	printf("%-*s Run all safe tests\n", len, "*");
+	printf("%-*s Run all safe tests\n", _len, "*");
 }
 
Index: uspace/app/tester/tester.h
===================================================================
--- uspace/app/tester/tester.h	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/tester.h	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -68,4 +68,5 @@
 extern const char *test_print3(void);
 extern const char *test_print4(void);
+extern const char *test_print5(void);
 extern const char *test_console1(void);
 extern const char *test_stdio1(void);
@@ -80,4 +81,5 @@
 extern const char *test_loop1(void);
 extern const char *test_malloc1(void);
+extern const char *test_serial1(void);
 
 extern test_t tests[];
Index: uspace/app/tester/thread/thread1.c
===================================================================
--- uspace/app/tester/thread/thread1.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/thread/thread1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -35,4 +35,5 @@
 #include <stdio.h>
 #include <unistd.h>
+#include <inttypes.h>
 #include "../tester.h"
 
@@ -74,5 +75,6 @@
 	atomic_set(&finish, 0);
 	while (atomic_get(&threads_finished) < total) {
-		TPRINTF("Threads left: %u\n", total - atomic_get(&threads_finished));
+		TPRINTF("Threads left: %" PRIua "\n",
+		    total - atomic_get(&threads_finished));
 		sleep(1);
 	}
Index: uspace/app/tester/vfs/vfs1.c
===================================================================
--- uspace/app/tester/vfs/vfs1.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/tester/vfs/vfs1.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -105,5 +105,5 @@
 	if (cnt < 0)
 		return "write() failed";
-	TPRINTF("Written %d bytes\n", cnt);
+	TPRINTF("Written %zd bytes\n", cnt);
 	
 	if (lseek(fd0, 0, SEEK_SET) != 0)
@@ -116,5 +116,11 @@
 			return "read() failed";
 		
-		TPRINTF("Read %d bytes: \".*s\"\n", cnt, cnt, buf);
+		int _cnt = (int) cnt;
+		if (_cnt != cnt) {
+			/* Count overflow, just to be sure. */
+			TPRINTF("Read %zd bytes\n", cnt);
+		} else {
+			TPRINTF("Read %zd bytes: \"%.*s\"\n", cnt, _cnt, buf);
+		}
 	}
 	
Index: uspace/app/top/screen.c
===================================================================
--- uspace/app/top/screen.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/top/screen.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -150,11 +150,15 @@
 	screen_get_pos(&c, &r);
 	
-	if (c < cols)
-		printf("%.*s", cols - c - 1, str);
+	if (c < cols) {
+		int pos = cols - c - 1;
+		printf("%.*s", pos, str);
+	}
 }
 
 static inline void print_global_head(data_t *data)
 {
-	printf("top - %02lu:%02lu:%02lu up %u days, %02u:%02u:%02u, load average:",
+	printf("top - %02lu:%02lu:%02lu up "
+	    "%" PRIun " days, %02" PRIun ":%02" PRIun ":%02" PRIun ", "
+	    "load average:",
 	    data->hours, data->minutes, data->seconds,
 	    data->udays, data->uhours, data->uminutes, data->useconds);
@@ -171,5 +175,5 @@
 static inline void print_task_summary(data_t *data)
 {
-	printf("tasks: %u total", data->tasks_count);
+	printf("tasks: %zu total", data->tasks_count);
 	screen_newline();
 }
@@ -211,6 +215,6 @@
 	}
 	
-	printf("threads: %u total, %u running, %u ready, %u sleeping, %u lingering, "
-	    "%u other, %u invalid",
+	printf("threads: %zu total, %zu running, %zu ready, "
+	    "%zu sleeping, %zu lingering, %zu other, %zu invalid",
 	    total, running, ready, sleeping, lingering, other, invalid);
 	screen_newline();
@@ -295,5 +299,5 @@
 		order_suffix(task->virtmem, &virtmem, &virtmem_suffix);
 		
-		printf("%-8" PRIu64 " %9u %8" PRIu64 "%c ", task->task_id,
+		printf("%-8" PRIu64 " %9zu %8" PRIu64 "%c ", task->task_id,
 		    task->threads, virtmem, virtmem_suffix);
 		print_percent(perc->virtmem, 2);
Index: uspace/app/trace/ipcp.c
===================================================================
--- uspace/app/trace/ipcp.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/trace/ipcp.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -137,9 +137,9 @@
 
 	if (oper != NULL) {
-		printf("%s (%ld)", oper->name, method);
+		printf("%s (%" PRIun ")", oper->name, method);
 		return;
 	}
 
-	printf("%ld", method);
+	printf("%" PRIun, method);
 }
 
@@ -201,10 +201,11 @@
 
 	if ((display_mask & DM_IPC) != 0) {
-		printf("Call ID: %p, phone: %d, proto: %s, method: ", hash,
-			phone, (proto ? proto->name : "n/a"));
+		printf("Call ID: %p, phone: %d, proto: %s, method: ",
+		    (void *) hash, phone,
+		    (proto ? proto->name : "n/a"));
 		ipc_m_print(proto, IPC_GET_METHOD(*call));
-		printf(" args: (%" PRIuIPCARG ", %" PRIuIPCARG ", %" PRIuIPCARG
-		    ", %" PRIuIPCARG ", %" PRIuIPCARG ")\n", args[1], args[2],
-		    args[3], args[4], args[5]);
+		printf(" args: (%" PRIun ", %" PRIun ", %" PRIun ", "
+		    "%" PRIun ", %" PRIun ")\n",
+		    args[1], args[2], args[3], args[4], args[5]);
 	}
 
@@ -281,8 +282,7 @@
 
 	if ((display_mask & DM_IPC) != 0) {
-		printf("Response to %p: retval=%ld, args = (%" PRIuIPCARG
-		    ", %" PRIuIPCARG ", %" PRIuIPCARG ", %" PRIuIPCARG
-		    ", %" PRIuIPCARG ")\n",
-		    hash, retval, IPC_GET_ARG1(*answer),
+		printf("Response to %p: retval=%" PRIdn ", args = (%" PRIun ", "
+		    "%" PRIun ", %" PRIun ", %" PRIun ", %" PRIun ")\n",
+		    (void *) hash, retval, IPC_GET_ARG1(*answer),
 		    IPC_GET_ARG2(*answer), IPC_GET_ARG3(*answer),
 		    IPC_GET_ARG4(*answer), IPC_GET_ARG5(*answer));
@@ -340,5 +340,5 @@
 		/* Not a response */
 		if ((display_mask & DM_IPC) != 0) {
-			printf("Not a response (hash %p)\n", hash);
+			printf("Not a response (hash %p)\n", (void *) hash);
 		}
 		return;
Index: uspace/app/trace/trace.c
===================================================================
--- uspace/app/trace/trace.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/trace/trace.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -161,5 +161,5 @@
 	if (rc < 0) {
 		printf("Error connecting\n");
-		printf("ipc_connect_task(%" PRIdTASKID ") -> %d ", task_id, rc);
+		printf("ipc_connect_task(%" PRIu64 ") -> %d ", task_id, rc);
 		return rc;
 	}
@@ -200,7 +200,7 @@
 	printf("Threads:");
 	for (i = 0; i < n_threads; i++) {
-		printf(" [%d] (hash %p)", 1+i, thread_hash_buf[i]);
-	}
-	printf("\ntotal of %u threads\n", tb_needed / sizeof(uintptr_t));
+		printf(" [%d] (hash %p)", 1 + i, (void *) thread_hash_buf[i]);
+	}
+	printf("\ntotal of %zu threads\n", tb_needed / sizeof(uintptr_t));
 
 	return 0;
@@ -224,5 +224,5 @@
 	case V_HASH:
 	case V_PTR:
-		printf("%p", val);
+		printf("%p", (void *) val);
 		break;
 
@@ -248,5 +248,5 @@
 	case V_CHAR:
 		if (sval >= 0x20 && sval < 0x7f) {
-			printf("'%c'", sval);
+			printf("'%c'", (char) sval);
 		} else {
 			switch (sval) {
@@ -257,5 +257,5 @@
 			case '\t': printf("'\\t'"); break;
 			case '\\': printf("'\\\\'"); break;
-			default: printf("'\\x%02lX'", val); break;
+			default: printf("'\\x%02" PRIxn "'", val); break;
 			}
 		}
@@ -277,7 +277,7 @@
 
 	putchar('(');
-	if (n > 0) printf("%" PRIdSYSARG, sc_args[0]);
+	if (n > 0) printf("%" PRIun, sc_args[0]);
 	for (i = 1; i < n; i++) {
-		printf(", %" PRIdSYSARG, sc_args[i]);
+		printf(", %" PRIun, sc_args[i]);
 	}
 	putchar(')');
@@ -489,5 +489,5 @@
 {
 	async_serialize_start();
-	printf("New thread, hash 0x%lx\n", hash);
+	printf("New thread, hash %p\n", (void *) hash);
 	async_serialize_end();
 
@@ -510,5 +510,6 @@
 	}
 
-	printf("Start tracing thread [%d] (hash %p).\n", thread_id, thread_hash);
+	printf("Start tracing thread [%u] (hash %p).\n",
+	    thread_id, (void *) thread_hash);
 
 	while (!abort_trace) {
@@ -516,5 +517,5 @@
 		fibril_mutex_lock(&state_lock);
 		if (paused) {
-			printf("Thread [%d] paused. Press R to resume.\n",
+			printf("Thread [%u] paused. Press R to resume.\n",
 			    thread_id);
 
@@ -522,5 +523,5 @@
 				fibril_condvar_wait(&state_cv, &state_lock);
 
-			printf("Thread [%d] resumed.\n", thread_id);
+			printf("Thread [%u] resumed.\n", thread_id);
 		}
 		fibril_mutex_unlock(&state_lock);
@@ -554,5 +555,5 @@
 				break;
 			case UDEBUG_EVENT_THREAD_E:
-				printf("Thread %p exited.\n", val0);
+				printf("Thread %" PRIun " exited.\n", val0);
 				fibril_mutex_lock(&state_lock);
 				abort_trace = true;
@@ -927,5 +928,5 @@
 				}
 			} else {
-				printf("Uknown option '%s'\n", arg[0]);
+				printf("Uknown option '%c'\n", arg[0]);
 				print_syntax();
 				return -1;
@@ -984,9 +985,9 @@
 	rc = connect_task(task_id);
 	if (rc < 0) {
-		printf("Failed connecting to task %" PRIdTASKID ".\n", task_id);
+		printf("Failed connecting to task %" PRIu64 ".\n", task_id);
 		return 1;
 	}
 
-	printf("Connected to task %" PRIdTASKID ".\n", task_id);
+	printf("Connected to task %" PRIu64 ".\n", task_id);
 
 	if (task_ldr != NULL)
Index: uspace/app/virtusbkbd/virtusbkbd.c
===================================================================
--- uspace/app/virtusbkbd/virtusbkbd.c	(revision 2e15ac408aa6d5ce089d57231c2eda5fe5db57d0)
+++ uspace/app/virtusbkbd/virtusbkbd.c	(revision bbc28becd7d06ac1598f9fe6c3a639eb10017af9)
@@ -170,5 +170,5 @@
 static void on_keyboard_change(kb_status_t *status)
 {
-	printf("%s: Current keyboard status: %08hhb", NAME, status->modifiers);
+	printf("%s: Current keyboard status: %02hhx", NAME, status->modifiers);
 	size_t i;
 	for (i = 0; i < KB_MAX_KEYS_AT_ONCE; i++) {