Sort some miscutils/ applets into coreutils or util-linux

No code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

9 files changed, 1353 insertions, 0 deletions

diff --git a/util-linux/chrt.c b/util-linux/chrt.c
new file mode 100644
index 000000000..1604a6890
--- /dev/null
+++ b/util-linux/chrt.c
@@ -0,0 +1,149 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * chrt - manipulate real-time attributes of a process
+ * Copyright (c) 2006-2007 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//config:config CHRT
+//config:	bool "chrt"
+//config:	default y
+//config:	help
+//config:	  manipulate real-time attributes of a process.
+//config:	  This requires sched_{g,s}etparam support in your libc.
+
+//applet:IF_CHRT(APPLET(chrt, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_CHRT) += chrt.o
+
+//usage:#define chrt_trivial_usage
+//usage:       "[-prfom] [PRIO] [PID | PROG ARGS]"
+//usage:#define chrt_full_usage "\n\n"
+//usage:       "Change scheduling priority and class for a process\n"
+//usage:     "\n	-p	Operate on PID"
+//usage:     "\n	-r	Set SCHED_RR class"
+//usage:     "\n	-f	Set SCHED_FIFO class"
+//usage:     "\n	-o	Set SCHED_OTHER class"
+//usage:     "\n	-m	Show min/max priorities"
+//usage:
+//usage:#define chrt_example_usage
+//usage:       "$ chrt -r 4 sleep 900; x=$!\n"
+//usage:       "$ chrt -f -p 3 $x\n"
+//usage:       "You need CAP_SYS_NICE privileges to set scheduling attributes of a process"
+
+#include <sched.h>
+#include "libbb.h"
+
+static const struct {
+	int policy;
+	char name[sizeof("SCHED_OTHER")];
+} policies[] = {
+	{SCHED_OTHER, "SCHED_OTHER"},
+	{SCHED_FIFO, "SCHED_FIFO"},
+	{SCHED_RR, "SCHED_RR"}
+};
+
+//TODO: add
+// -b, SCHED_BATCH
+// -i, SCHED_IDLE
+
+static void show_min_max(int pol)
+{
+	const char *fmt = "%s min/max priority\t: %u/%u\n";
+	int max, min;
+
+	max = sched_get_priority_max(pol);
+	min = sched_get_priority_min(pol);
+	if ((max|min) < 0)
+		fmt = "%s not supported\n";
+	printf(fmt, policies[pol].name, min, max);
+}
+
+#define OPT_m (1<<0)
+#define OPT_p (1<<1)
+#define OPT_r (1<<2)
+#define OPT_f (1<<3)
+#define OPT_o (1<<4)
+
+int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int chrt_main(int argc UNUSED_PARAM, char **argv)
+{
+	pid_t pid = 0;
+	unsigned opt;
+	struct sched_param sp;
+	char *pid_str;
+	char *priority = priority; /* for compiler */
+	const char *current_new;
+	int policy = SCHED_RR;
+
+	/* only one policy accepted */
+	opt_complementary = "r--fo:f--ro:o--rf";
+	opt = getopt32(argv, "+mprfo");
+	if (opt & OPT_m) { /* print min/max and exit */
+		show_min_max(SCHED_FIFO);
+		show_min_max(SCHED_RR);
+		show_min_max(SCHED_OTHER);
+		fflush_stdout_and_exit(EXIT_SUCCESS);
+	}
+	if (opt & OPT_r)
+		policy = SCHED_RR;
+	if (opt & OPT_f)
+		policy = SCHED_FIFO;
+	if (opt & OPT_o)
+		policy = SCHED_OTHER;
+
+	argv += optind;
+	if (!argv[0])
+		bb_show_usage();
+	if (opt & OPT_p) {
+		pid_str = *argv++;
+		if (*argv) { /* "-p <priority> <pid> [...]" */
+			priority = pid_str;
+			pid_str = *argv;
+		}
+		/* else "-p <pid>", and *argv == NULL */
+		pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
+	} else {
+		priority = *argv++;
+		if (!*argv)
+			bb_show_usage();
+	}
+
+	current_new = "current\0new";
+	if (opt & OPT_p) {
+		int pol;
+ print_rt_info:
+		pol = sched_getscheduler(pid);
+		if (pol < 0)
+			bb_perror_msg_and_die("can't %cet pid %d's policy", 'g', (int)pid);
+		printf("pid %d's %s scheduling policy: %s\n",
+				pid, current_new, policies[pol].name);
+		if (sched_getparam(pid, &sp))
+			bb_perror_msg_and_die("can't get pid %d's attributes", (int)pid);
+		printf("pid %d's %s scheduling priority: %d\n",
+				(int)pid, current_new, sp.sched_priority);
+		if (!*argv) {
+			/* Either it was just "-p <pid>",
+			 * or it was "-p <priority> <pid>" and we came here
+			 * for the second time (see goto below) */
+			return EXIT_SUCCESS;
+		}
+		*argv = NULL;
+		current_new += 8;
+	}
+
+	/* from the manpage of sched_getscheduler:
+	[...] sched_priority can have a value in the range 0 to 99.
+	[...] SCHED_OTHER or SCHED_BATCH must be assigned static priority 0.
+	[...] SCHED_FIFO or SCHED_RR can have static priority in 1..99 range.
+	*/
+	sp.sched_priority = xstrtou_range(priority, 0, policy != SCHED_OTHER ? 1 : 0, 99);
+
+	if (sched_setscheduler(pid, policy, &sp) < 0)
+		bb_perror_msg_and_die("can't %cet pid %d's policy", 's', (int)pid);
+
+	if (!argv[0]) /* "-p <priority> <pid> [...]" */
+		goto print_rt_info;
+
+	BB_EXECVP_or_die(argv);
+}
diff --git a/util-linux/eject.c b/util-linux/eject.c
new file mode 100644
index 000000000..667932f6c
--- /dev/null
+++ b/util-linux/eject.c
@@ -0,0 +1,152 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * eject implementation for busybox
+ *
+ * Copyright (C) 2004  Peter Willis <psyphreak@phreaker.net>
+ * Copyright (C) 2005  Tito Ragusa <farmatito@tiscali.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/*
+ * This is a simple hack of eject based on something Erik posted in #uclibc.
+ * Most of the dirty work blatantly ripped off from cat.c =)
+ */
+//config:config EJECT
+//config:	bool "eject"
+//config:	default y
+//config:	select PLATFORM_LINUX
+//config:	help
+//config:	  Used to eject cdroms. (defaults to /dev/cdrom)
+//config:
+//config:config FEATURE_EJECT_SCSI
+//config:	bool "SCSI support"
+//config:	default y
+//config:	depends on EJECT
+//config:	help
+//config:	  Add the -s option to eject, this allows to eject SCSI-Devices and
+//config:	  usb-storage devices.
+
+//applet:IF_EJECT(APPLET(eject, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_EJECT) += eject.o
+
+//usage:#define eject_trivial_usage
+//usage:       "[-t] [-T] [DEVICE]"
+//usage:#define eject_full_usage "\n\n"
+//usage:       "Eject DEVICE or default /dev/cdrom\n"
+//usage:	IF_FEATURE_EJECT_SCSI(
+//usage:     "\n	-s	SCSI device"
+//usage:	)
+//usage:     "\n	-t	Close tray"
+//usage:     "\n	-T	Open/close tray (toggle)"
+
+#include <sys/mount.h>
+#include "libbb.h"
+#if ENABLE_FEATURE_EJECT_SCSI
+/* Must be after libbb.h: they need size_t */
+# include "fix_u32.h"
+# include <scsi/sg.h>
+# include <scsi/scsi.h>
+#endif
+
+#define dev_fd 3
+
+/* Code taken from the original eject (http://eject.sourceforge.net/),
+ * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
+
+#if ENABLE_FEATURE_EJECT_SCSI
+static void eject_scsi(const char *dev)
+{
+	static const char sg_commands[3][6] ALIGN1 = {
+		{ ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0 },
+		{ START_STOP, 0, 0, 0, 1, 0 },
+		{ START_STOP, 0, 0, 0, 2, 0 }
+	};
+
+	unsigned i;
+	unsigned char sense_buffer[32];
+	unsigned char inqBuff[2];
+	sg_io_hdr_t io_hdr;
+
+	if ((ioctl(dev_fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
+		bb_error_msg_and_die("not a sg device or old sg driver");
+
+	memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
+	io_hdr.interface_id = 'S';
+	io_hdr.cmd_len = 6;
+	io_hdr.mx_sb_len = sizeof(sense_buffer);
+	io_hdr.dxfer_direction = SG_DXFER_NONE;
+	/* io_hdr.dxfer_len = 0; */
+	io_hdr.dxferp = inqBuff;
+	io_hdr.sbp = sense_buffer;
+	io_hdr.timeout = 2000;
+
+	for (i = 0; i < 3; i++) {
+		io_hdr.cmdp = (void *)sg_commands[i];
+		ioctl_or_perror_and_die(dev_fd, SG_IO, (void *)&io_hdr, "%s", dev);
+	}
+
+	/* force kernel to reread partition table when new disc is inserted */
+	ioctl(dev_fd, BLKRRPART);
+}
+#else
+# define eject_scsi(dev) ((void)0)
+#endif
+
+/* various defines swiped from linux/cdrom.h */
+#define CDROMCLOSETRAY            0x5319  /* pendant of CDROMEJECT  */
+#define CDROMEJECT                0x5309  /* Ejects the cdrom media */
+#define CDROM_DRIVE_STATUS        0x5326  /* Get tray position, etc. */
+/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
+#define CDS_TRAY_OPEN        2
+
+#define FLAG_CLOSE  1
+#define FLAG_SMART  2
+#define FLAG_SCSI   4
+
+static void eject_cdrom(unsigned flags, const char *dev)
+{
+	int cmd = CDROMEJECT;
+
+	if (flags & FLAG_CLOSE
+	 || ((flags & FLAG_SMART) && ioctl(dev_fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN)
+	) {
+		cmd = CDROMCLOSETRAY;
+	}
+
+	ioctl_or_perror_and_die(dev_fd, cmd, NULL, "%s", dev);
+}
+
+int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int eject_main(int argc UNUSED_PARAM, char **argv)
+{
+	unsigned flags;
+	const char *device;
+
+	opt_complementary = "?1:t--T:T--t";
+	flags = getopt32(argv, "tT" IF_FEATURE_EJECT_SCSI("s"));
+	device = argv[optind] ? argv[optind] : "/dev/cdrom";
+
+	/* We used to do "umount <device>" here, but it was buggy
+	   if something was mounted OVER cdrom and
+	   if cdrom is mounted many times.
+
+	   This works equally well (or better):
+	   #!/bin/sh
+	   umount /dev/cdrom
+	   eject /dev/cdrom
+	*/
+
+	xmove_fd(xopen_nonblocking(device), dev_fd);
+
+	if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
+		eject_scsi(device);
+	else
+		eject_cdrom(flags, device);
+
+	if (ENABLE_FEATURE_CLEAN_UP)
+		close(dev_fd);
+
+	return EXIT_SUCCESS;
+}
diff --git a/util-linux/ionice.c b/util-linux/ionice.c
new file mode 100644
index 000000000..c54b3a6e1
--- /dev/null
+++ b/util-linux/ionice.c
@@ -0,0 +1,115 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * ionice implementation for busybox based on linux-utils-ng 2.14
+ *
+ * Copyright (C) 2008 by  <u173034@informatik.uni-oldenburg.de>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//config:config IONICE
+//config:	bool "ionice"
+//config:	default y
+//config:	select PLATFORM_LINUX
+//config:	help
+//config:	  Set/set program io scheduling class and priority
+//config:	  Requires kernel >= 2.6.13
+
+//applet:IF_IONICE(APPLET(ionice, BB_DIR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_IONICE) += ionice.o
+
+//usage:#define ionice_trivial_usage
+//usage:	"[-c 1-3] [-n 0-7] [-p PID] [PROG]"
+//usage:#define ionice_full_usage "\n\n"
+//usage:       "Change I/O priority and class\n"
+//usage:     "\n	-c	Class. 1:realtime 2:best-effort 3:idle"
+//usage:     "\n	-n	Priority"
+
+#include <sys/syscall.h>
+#include <asm/unistd.h>
+#include "libbb.h"
+
+static int ioprio_set(int which, int who, int ioprio)
+{
+	return syscall(SYS_ioprio_set, which, who, ioprio);
+}
+
+static int ioprio_get(int which, int who)
+{
+	return syscall(SYS_ioprio_get, which, who);
+}
+
+enum {
+	IOPRIO_WHO_PROCESS = 1,
+	IOPRIO_WHO_PGRP,
+	IOPRIO_WHO_USER
+};
+
+enum {
+	IOPRIO_CLASS_NONE,
+	IOPRIO_CLASS_RT,
+	IOPRIO_CLASS_BE,
+	IOPRIO_CLASS_IDLE
+};
+
+static const char to_prio[] ALIGN1 = "none\0realtime\0best-effort\0idle";
+
+#define IOPRIO_CLASS_SHIFT      13
+
+int ionice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ionice_main(int argc UNUSED_PARAM, char **argv)
+{
+	/* Defaults */
+	int ioclass = 0;
+	int pri = 0;
+	int pid = 0; /* affect own porcess */
+	int opt;
+	enum {
+		OPT_n = 1,
+		OPT_c = 2,
+		OPT_p = 4,
+	};
+
+	/* Numeric params */
+	/* '+': stop at first non-option */
+	opt = getopt32(argv, "+n:+c:+p:+", &pri, &ioclass, &pid);
+	argv += optind;
+
+	if (opt & OPT_c) {
+		if (ioclass > 3)
+			bb_error_msg_and_die("bad class %d", ioclass);
+// Do we need this (compat?)?
+//		if (ioclass == IOPRIO_CLASS_NONE)
+//			ioclass = IOPRIO_CLASS_BE;
+//		if (ioclass == IOPRIO_CLASS_IDLE) {
+//			//if (opt & OPT_n)
+//			//	bb_error_msg("ignoring priority for idle class");
+//			pri = 7;
+//		}
+	}
+
+	if (!(opt & (OPT_n|OPT_c))) {
+		if (!(opt & OPT_p) && *argv)
+			pid = xatoi_positive(*argv);
+
+		pri = ioprio_get(IOPRIO_WHO_PROCESS, pid);
+		if (pri == -1)
+			bb_perror_msg_and_die("ioprio_%cet", 'g');
+
+		ioclass = (pri >> IOPRIO_CLASS_SHIFT) & 0x3;
+		pri &= 0xff;
+		printf((ioclass == IOPRIO_CLASS_IDLE) ? "%s\n" : "%s: prio %d\n",
+				nth_string(to_prio, ioclass), pri);
+	} else {
+//printf("pri=%d class=%d val=%x\n",
+//pri, ioclass, pri | (ioclass << IOPRIO_CLASS_SHIFT));
+		pri |= (ioclass << IOPRIO_CLASS_SHIFT);
+		if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
+			bb_perror_msg_and_die("ioprio_%cet", 's');
+		if (argv[0]) {
+			BB_EXECVP_or_die(argv);
+		}
+	}
+
+	return EXIT_SUCCESS;
+}
diff --git a/util-linux/last.c b/util-linux/last.c
new file mode 100644
index 000000000..b3f125c3f
--- /dev/null
+++ b/util-linux/last.c
@@ -0,0 +1,166 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * last implementation for busybox
+ *
+ * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//config:config LAST
+//config:	bool "last"
+//config:	default y
+//config:	depends on FEATURE_WTMP
+//config:	help
+//config:	  'last' displays a list of the last users that logged into the system.
+//config:
+//config:config FEATURE_LAST_FANCY
+//config:	bool "Output extra information"
+//config:	default y
+//config:	depends on LAST
+//config:	help
+//config:	  'last' displays detailed information about the last users that
+//config:	  logged into the system (mimics sysvinit last). +900 bytes.
+
+//applet:IF_LAST(APPLET(last, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:ifeq ($(CONFIG_FEATURE_LAST_FANCY),y)
+//kbuild:lib-$(CONFIG_FEATURE_LAST_FANCY) += last_fancy.o
+//kbuild:else
+//kbuild:lib-$(CONFIG_LAST) += last.o
+//kbuild:endif
+
+//usage:#define last_trivial_usage
+//usage:       ""IF_FEATURE_LAST_FANCY("[-HW] [-f FILE]")
+//usage:#define last_full_usage "\n\n"
+//usage:       "Show listing of the last users that logged into the system"
+//usage:	IF_FEATURE_LAST_FANCY( "\n"
+/* //usage:  "\n	-H	Show header line" */
+//usage:     "\n	-W	Display with no host column truncation"
+//usage:     "\n	-f FILE Read from FILE instead of /var/log/wtmp"
+//usage:	)
+
+#include "libbb.h"
+
+/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
+ * to reduce confusion */
+
+#ifndef SHUTDOWN_TIME
+#  define SHUTDOWN_TIME 254
+#endif
+
+/* Grr... utmp char[] members do not have to be nul-terminated.
+ * Do what we can while still keeping this reasonably small.
+ * Note: We are assuming the ut_id[] size is fixed at 4. */
+
+#if defined UT_LINESIZE \
+	&& ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
+#error struct utmpx member char[] size(s) have changed!
+#elif defined __UT_LINESIZE \
+	&& ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 32) || (__UT_HOSTSIZE != 256))
+/* __UT_NAMESIZE was checked with 64 above, but glibc-2.11 definitely uses 32! */
+#error struct utmpx member char[] size(s) have changed!
+#endif
+
+#if EMPTY != 0 || RUN_LVL != 1 || BOOT_TIME != 2 || NEW_TIME != 3 || \
+	OLD_TIME != 4
+#error Values for the ut_type field of struct utmpx changed
+#endif
+
+int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+	struct utmpx ut;
+	int n, file = STDIN_FILENO;
+	time_t t_tmp;
+	off_t pos;
+	static const char _ut_usr[] ALIGN1 =
+			"runlevel\0" "reboot\0" "shutdown\0";
+	static const char _ut_lin[] ALIGN1 =
+			"~\0" "{\0" "|\0" /* "LOGIN\0" "date\0" */;
+	enum {
+		TYPE_RUN_LVL = RUN_LVL,         /* 1 */
+		TYPE_BOOT_TIME = BOOT_TIME,     /* 2 */
+		TYPE_SHUTDOWN_TIME = SHUTDOWN_TIME
+	};
+	enum {
+		_TILDE = EMPTY, /* 0 */
+		TYPE_NEW_TIME,  /* NEW_TIME, 3 */
+		TYPE_OLD_TIME   /* OLD_TIME, 4 */
+	};
+
+	if (argv[1]) {
+		bb_show_usage();
+	}
+	file = xopen(bb_path_wtmp_file, O_RDONLY);
+
+	printf("%-10s %-14s %-18s %-12.12s %s\n",
+		"USER", "TTY", "HOST", "LOGIN", "TIME");
+	/* yikes. We reverse over the file and that is a not too elegant way */
+	pos = xlseek(file, 0, SEEK_END);
+	pos = lseek(file, pos - sizeof(ut), SEEK_SET);
+	while ((n = full_read(file, &ut, sizeof(ut))) > 0) {
+		if (n != sizeof(ut)) {
+			bb_perror_msg_and_die("short read");
+		}
+		n = index_in_strings(_ut_lin, ut.ut_line);
+		if (n == _TILDE) { /* '~' */
+#if 1
+/* do we really need to be cautious here? */
+			n = index_in_strings(_ut_usr, ut.ut_user);
+			if (++n > 0)
+				ut.ut_type = n != 3 ? n : SHUTDOWN_TIME;
+#else
+			if (is_prefixed_with(ut.ut_user, "shutdown"))
+				ut.ut_type = SHUTDOWN_TIME;
+			else if (is_prefixed_with(ut.ut_user, "reboot"))
+				ut.ut_type = BOOT_TIME;
+			else if (is_prefixed_with(ut.ut_user, "runlevel"))
+				ut.ut_type = RUN_LVL;
+#endif
+		} else {
+			if (ut.ut_user[0] == '\0' || strcmp(ut.ut_user, "LOGIN") == 0) {
+				/* Don't bother.  This means we can't find how long
+				 * someone was logged in for.  Oh well. */
+				goto next;
+			}
+			if (ut.ut_type != DEAD_PROCESS
+			 && ut.ut_user[0]
+			 && ut.ut_line[0]
+			) {
+				ut.ut_type = USER_PROCESS;
+			}
+			if (strcmp(ut.ut_user, "date") == 0) {
+				if (n == TYPE_OLD_TIME) { /* '|' */
+					ut.ut_type = OLD_TIME;
+				}
+				if (n == TYPE_NEW_TIME) { /* '{' */
+					ut.ut_type = NEW_TIME;
+				}
+			}
+		}
+
+		if (ut.ut_type != USER_PROCESS) {
+			switch (ut.ut_type) {
+				case OLD_TIME:
+				case NEW_TIME:
+				case RUN_LVL:
+				case SHUTDOWN_TIME:
+					goto next;
+				case BOOT_TIME:
+					strcpy(ut.ut_line, "system boot");
+			}
+		}
+		/* manpages say ut_tv.tv_sec *is* time_t,
+		 * but some systems have it wrong */
+		t_tmp = (time_t)ut.ut_tv.tv_sec;
+		printf("%-10s %-14s %-18s %-12.12s\n",
+			ut.ut_user, ut.ut_line, ut.ut_host, ctime(&t_tmp) + 4);
+ next:
+		pos -= sizeof(ut);
+		if (pos <= 0)
+			break; /* done. */
+		xlseek(file, pos, SEEK_SET);
+	}
+
+	fflush_stdout_and_exit(EXIT_SUCCESS);
+}
diff --git a/util-linux/last_fancy.c b/util-linux/last_fancy.c
new file mode 100644
index 000000000..e56e0ba85
--- /dev/null
+++ b/util-linux/last_fancy.c
@@ -0,0 +1,300 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * (sysvinit like) last implementation
+ *
+ * Copyright (C) 2008 by Patricia Muscalu <patricia.muscalu@axis.com>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
+ * to reduce confusion */
+
+#ifndef SHUTDOWN_TIME
+#  define SHUTDOWN_TIME 254
+#endif
+
+#define HEADER_FORMAT     "%-8.8s %-12.12s %-*.*s %-16.16s %-7.7s %s\n"
+#define HEADER_LINE       "USER", "TTY", \
+	INET_ADDRSTRLEN, INET_ADDRSTRLEN, "HOST", "LOGIN", "  TIME", ""
+#define HEADER_LINE_WIDE  "USER", "TTY", \
+	INET6_ADDRSTRLEN, INET6_ADDRSTRLEN, "HOST", "LOGIN", "  TIME", ""
+
+#if !defined __UT_LINESIZE && defined UT_LINESIZE
+# define __UT_LINESIZE UT_LINESIZE
+#endif
+
+enum {
+	NORMAL,
+	LOGGED,
+	DOWN,
+	REBOOT,
+	CRASH,
+	GONE
+};
+
+enum {
+	LAST_OPT_W = (1 << 0),  /* -W wide            */
+	LAST_OPT_f = (1 << 1),  /* -f input file      */
+	LAST_OPT_H = (1 << 2),  /* -H header          */
+};
+
+#define show_wide (option_mask32 & LAST_OPT_W)
+
+static void show_entry(struct utmpx *ut, int state, time_t dur_secs)
+{
+	unsigned days, hours, mins;
+	char duration[sizeof("(%u+02:02)") + sizeof(int)*3];
+	char login_time[17];
+	char logout_time[8];
+	const char *logout_str;
+	const char *duration_str;
+	time_t tmp;
+
+	/* manpages say ut_tv.tv_sec *is* time_t,
+	 * but some systems have it wrong */
+	tmp = ut->ut_tv.tv_sec;
+	safe_strncpy(login_time, ctime(&tmp), 17);
+	tmp = dur_secs;
+	snprintf(logout_time, 8, "- %s", ctime(&tmp) + 11);
+
+	dur_secs = MAX(dur_secs - (time_t)ut->ut_tv.tv_sec, (time_t)0);
+	/* unsigned int is easier to divide than time_t (which may be signed long) */
+	mins = dur_secs / 60;
+	days = mins / (24*60);
+	mins = mins % (24*60);
+	hours = mins / 60;
+	mins = mins % 60;
+
+//	if (days) {
+		sprintf(duration, "(%u+%02u:%02u)", days, hours, mins);
+//	} else {
+//		sprintf(duration, " (%02u:%02u)", hours, mins);
+//	}
+
+	logout_str = logout_time;
+	duration_str = duration;
+	switch (state) {
+	case NORMAL:
+		break;
+	case LOGGED:
+		logout_str = "  still";
+		duration_str = "logged in";
+		break;
+	case DOWN:
+		logout_str = "- down ";
+		break;
+	case REBOOT:
+		break;
+	case CRASH:
+		logout_str = "- crash";
+		break;
+	case GONE:
+		logout_str = "   gone";
+		duration_str = "- no logout";
+		break;
+	}
+
+	printf(HEADER_FORMAT,
+		ut->ut_user,
+		ut->ut_line,
+		show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+		show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+		ut->ut_host,
+		login_time,
+		logout_str,
+		duration_str);
+}
+
+static int get_ut_type(struct utmpx *ut)
+{
+	if (ut->ut_line[0] == '~') {
+		if (strcmp(ut->ut_user, "shutdown") == 0) {
+			return SHUTDOWN_TIME;
+		}
+		if (strcmp(ut->ut_user, "reboot") == 0) {
+			return BOOT_TIME;
+		}
+		if (strcmp(ut->ut_user, "runlevel") == 0) {
+			return RUN_LVL;
+		}
+		return ut->ut_type;
+	}
+
+	if (ut->ut_user[0] == 0) {
+		return DEAD_PROCESS;
+	}
+
+	if ((ut->ut_type != DEAD_PROCESS)
+	 && (strcmp(ut->ut_user, "LOGIN") != 0)
+	 && ut->ut_user[0]
+	 && ut->ut_line[0]
+	) {
+		ut->ut_type = USER_PROCESS;
+	}
+
+	if (strcmp(ut->ut_user, "date") == 0) {
+		if (ut->ut_line[0] == '|') {
+			return OLD_TIME;
+		}
+		if (ut->ut_line[0] == '{') {
+			return NEW_TIME;
+		}
+	}
+	return ut->ut_type;
+}
+
+static int is_runlevel_shutdown(struct utmpx *ut)
+{
+	if (((ut->ut_pid & 255) == '0') || ((ut->ut_pid & 255) == '6')) {
+		return 1;
+	}
+
+	return 0;
+}
+
+int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int last_main(int argc UNUSED_PARAM, char **argv)
+{
+	struct utmpx ut;
+	const char *filename = _PATH_WTMP;
+	llist_t *zlist;
+	off_t pos;
+	time_t start_time;
+	time_t boot_time;
+	time_t down_time;
+	int file;
+	smallint going_down;
+	smallint boot_down;
+
+	/*opt =*/ getopt32(argv, "Wf:" /* "H" */, &filename);
+#ifdef BUT_UTIL_LINUX_LAST_HAS_NO_SUCH_OPT
+	if (opt & LAST_OPT_H) {
+		/* Print header line */
+		if (opt & LAST_OPT_W) {
+			printf(HEADER_FORMAT, HEADER_LINE_WIDE);
+		} else {
+			printf(HEADER_FORMAT, HEADER_LINE);
+		}
+	}
+#endif
+
+	file = xopen(filename, O_RDONLY);
+	{
+		/* in case the file is empty... */
+		struct stat st;
+		fstat(file, &st);
+		start_time = st.st_ctime;
+	}
+
+	time(&down_time);
+	going_down = 0;
+	boot_down = NORMAL; /* 0 */
+	zlist = NULL;
+	boot_time = 0;
+	/* get file size, rounding down to last full record */
+	pos = xlseek(file, 0, SEEK_END) / sizeof(ut) * sizeof(ut);
+	for (;;) {
+		pos -= (off_t)sizeof(ut);
+		if (pos < 0) {
+			/* Beyond the beginning of the file boundary =>
+			 * the whole file has been read. */
+			break;
+		}
+		xlseek(file, pos, SEEK_SET);
+		xread(file, &ut, sizeof(ut));
+		/* rewritten by each record, eventially will have
+		 * first record's ut_tv.tv_sec: */
+		start_time = ut.ut_tv.tv_sec;
+
+		switch (get_ut_type(&ut)) {
+		case SHUTDOWN_TIME:
+			down_time = ut.ut_tv.tv_sec;
+			boot_down = DOWN;
+			going_down = 1;
+			break;
+		case RUN_LVL:
+			if (is_runlevel_shutdown(&ut)) {
+				down_time = ut.ut_tv.tv_sec;
+				going_down = 1;
+				boot_down = DOWN;
+			}
+			break;
+		case BOOT_TIME:
+			strcpy(ut.ut_line, "system boot");
+			show_entry(&ut, REBOOT, down_time);
+			boot_down = CRASH;
+			going_down = 1;
+			break;
+		case DEAD_PROCESS:
+			if (!ut.ut_line[0]) {
+				break;
+			}
+			/* add_entry */
+			llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
+			break;
+		case USER_PROCESS: {
+			int show;
+
+			if (!ut.ut_line[0]) {
+				break;
+			}
+			/* find_entry */
+			show = 1;
+			{
+				llist_t *el, *next;
+				for (el = zlist; el; el = next) {
+					struct utmpx *up = (struct utmpx *)el->data;
+					next = el->link;
+					if (strncmp(up->ut_line, ut.ut_line, __UT_LINESIZE) == 0) {
+						if (show) {
+							show_entry(&ut, NORMAL, up->ut_tv.tv_sec);
+							show = 0;
+						}
+						llist_unlink(&zlist, el);
+						free(el->data);
+						free(el);
+					}
+				}
+			}
+
+			if (show) {
+				int state = boot_down;
+
+				if (boot_time == 0) {
+					state = LOGGED;
+					/* Check if the process is alive */
+					if ((ut.ut_pid > 0)
+					 && (kill(ut.ut_pid, 0) != 0)
+					 && (errno == ESRCH)) {
+						state = GONE;
+					}
+				}
+				show_entry(&ut, state, boot_time);
+			}
+			/* add_entry */
+			llist_add_to(&zlist, xmemdup(&ut, sizeof(ut)));
+			break;
+		}
+		}
+
+		if (going_down) {
+			boot_time = ut.ut_tv.tv_sec;
+			llist_free(zlist, free);
+			zlist = NULL;
+			going_down = 0;
+		}
+	}
+
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		llist_free(zlist, free);
+	}
+
+	printf("\nwtmp begins %s", ctime(&start_time));
+
+	if (ENABLE_FEATURE_CLEAN_UP)
+		close(file);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
+}
diff --git a/util-linux/mountpoint.c b/util-linux/mountpoint.c
new file mode 100644
index 000000000..8b9e1d779
--- /dev/null
+++ b/util-linux/mountpoint.c
@@ -0,0 +1,105 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * mountpoint implementation for busybox
+ *
+ * Copyright (C) 2005 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ *
+ * Based on sysvinit's mountpoint
+ */
+//config:config MOUNTPOINT
+//config:	bool "mountpoint"
+//config:	default y
+//config:	help
+//config:	  mountpoint checks if the directory is a mountpoint.
+
+//applet:IF_MOUNTPOINT(APPLET(mountpoint, BB_DIR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_MOUNTPOINT) += mountpoint.o
+
+//usage:#define mountpoint_trivial_usage
+//usage:       "[-q] <[-dn] DIR | -x DEVICE>"
+//usage:#define mountpoint_full_usage "\n\n"
+//usage:       "Check if the directory is a mountpoint\n"
+//usage:     "\n	-q	Quiet"
+//usage:     "\n	-d	Print major/minor device number of the filesystem"
+//usage:     "\n	-n	Print device name of the filesystem"
+//usage:     "\n	-x	Print major/minor device number of the blockdevice"
+//usage:
+//usage:#define mountpoint_example_usage
+//usage:       "$ mountpoint /proc\n"
+//usage:       "/proc is not a mountpoint\n"
+//usage:       "$ mountpoint /sys\n"
+//usage:       "/sys is a mountpoint\n"
+
+#include "libbb.h"
+
+int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mountpoint_main(int argc UNUSED_PARAM, char **argv)
+{
+	struct stat st;
+	const char *msg;
+	char *arg;
+	int rc, opt;
+
+	opt_complementary = "=1"; /* must have one argument */
+	opt = getopt32(argv, "qdxn");
+#define OPT_q (1)
+#define OPT_d (2)
+#define OPT_x (4)
+#define OPT_n (8)
+	arg = argv[optind];
+	msg = "%s";
+
+	rc = (opt & OPT_x) ? stat(arg, &st) : lstat(arg, &st);
+	if (rc != 0)
+		goto err;
+
+	if (opt & OPT_x) {
+		if (S_ISBLK(st.st_mode)) {
+			printf("%u:%u\n", major(st.st_rdev),
+						minor(st.st_rdev));
+			return EXIT_SUCCESS;
+		}
+		errno = 0; /* make perror_msg work as error_msg */
+		msg = "%s: not a block device";
+		goto err;
+	}
+
+	errno = ENOTDIR;
+	if (S_ISDIR(st.st_mode)) {
+		dev_t st_dev = st.st_dev;
+		ino_t st_ino = st.st_ino;
+		char *p = xasprintf("%s/..", arg);
+
+		if (stat(p, &st) == 0) {
+			//int is_mnt = (st_dev != st.st_dev) || (st_dev == st.st_dev && st_ino == st.st_ino);
+			int is_not_mnt = (st_dev == st.st_dev) && (st_ino != st.st_ino);
+
+			if (opt & OPT_d)
+				printf("%u:%u\n", major(st_dev), minor(st_dev));
+			if (opt & OPT_n) {
+				const char *d = find_block_device(arg);
+				/* name is undefined, but device is mounted -> anonymous superblock! */
+				/* happens with btrfs */
+				if (!d) {
+					d = "UNKNOWN";
+					/* TODO: iterate /proc/mounts, or /proc/self/mountinfo
+					 * to find out the device name */
+				}
+				printf("%s %s\n", d, arg);
+			}
+			if (!(opt & (OPT_q | OPT_d | OPT_n)))
+				printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : "");
+			return is_not_mnt;
+		}
+		arg = p;
+		/* else: stat had set errno, just fall through */
+	}
+
+ err:
+	if (!(opt & OPT_q))
+		bb_perror_msg(msg, arg);
+	return EXIT_FAILURE;
+}
diff --git a/util-linux/setsid.c b/util-linux/setsid.c
new file mode 100644
index 000000000..143a8f8fa
--- /dev/null
+++ b/util-linux/setsid.c
@@ -0,0 +1,82 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * setsid.c -- execute a command in a new session
+ * Rick Sladkey <jrs@world.std.com>
+ * In the public domain.
+ *
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ *
+ * 2001-01-18 John Fremlin <vii@penguinpowered.com>
+ * - fork in case we are process group leader
+ *
+ * 2004-11-12 Paul Fox
+ * - busyboxed
+ */
+//config:config SETSID
+//config:	bool "setsid"
+//config:	default y
+//config:	help
+//config:	  setsid runs a program in a new session
+
+//applet:IF_SETSID(APPLET(setsid, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SETSID) += setsid.o
+
+//usage:#define setsid_trivial_usage
+//usage:       "[-c] PROG ARGS"
+//usage:#define setsid_full_usage "\n\n"
+//usage:       "Run PROG in a new session. PROG will have no controlling terminal\n"
+//usage:       "and will not be affected by keyboard signals (^C etc).\n"
+//usage:     "\n	-c	Set controlling terminal to stdin"
+
+#include "libbb.h"
+
+int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setsid_main(int argc UNUSED_PARAM, char **argv)
+{
+	unsigned opt;
+
+	opt_complementary = "-1"; /* at least one arg */
+	opt = getopt32(argv, "+c"); /* +: stop on first non-opt */
+	argv += optind;
+
+	/* setsid() is allowed only when we are not a process group leader.
+	 * Otherwise our PID serves as PGID of some existing process group
+	 * and cannot be used as PGID of a new process group.
+	 *
+	 * Example: setsid() below fails when run alone in interactive shell:
+	 *  $ setsid PROG
+	 * because shell's child (setsid) is put in a new process group.
+	 * But doesn't fail if shell is not interactive
+	 * (and therefore doesn't create process groups for pipes),
+	 * or if setsid is not the first process in the process group:
+	 *  $ true | setsid PROG
+	 * or if setsid is executed in backquotes (`setsid PROG`)...
+	 */
+	if (setsid() < 0) {
+		pid_t pid = fork_or_rexec(argv);
+		if (pid != 0) {
+			/* parent */
+			/* TODO:
+			 * we can waitpid(pid, &status, 0) and then even
+			 * emulate exitcode, making the behavior consistent
+			 * in both forked and non forked cases.
+			 * However, the code is larger and upstream
+			 * does not do such trick.
+			 */
+			return EXIT_SUCCESS;
+		}
+
+		/* child */
+		/* now there should be no error: */
+		setsid();
+	}
+
+	if (opt) {
+		/* -c: set (with stealing) controlling tty */
+		ioctl(0, TIOCSCTTY, 1);
+	}
+
+	BB_EXECVP_or_die(argv);
+}
diff --git a/util-linux/taskset.c b/util-linux/taskset.c
new file mode 100644
index 000000000..94a07383a
--- /dev/null
+++ b/util-linux/taskset.c
@@ -0,0 +1,221 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * taskset - retrieve or set a processes' CPU affinity
+ * Copyright (c) 2006 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//config:config TASKSET
+//config:	bool "taskset"
+//config:	default y
+//config:	help
+//config:	  Retrieve or set a processes's CPU affinity.
+//config:	  This requires sched_{g,s}etaffinity support in your libc.
+//config:
+//config:config FEATURE_TASKSET_FANCY
+//config:	bool "Fancy output"
+//config:	default y
+//config:	depends on TASKSET
+//config:	help
+//config:	  Needed for machines with more than 32-64 CPUs:
+//config:	  affinity parameter 0xHHHHHHHHHHHHHHHHHHHH can be arbitrarily long
+//config:	  in this case. Otherwise, it is limited to sizeof(long).
+
+//applet:IF_TASKSET(APPLET(taskset, BB_DIR_USR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_TASKSET) += taskset.o
+
+//usage:#define taskset_trivial_usage
+//usage:       "[-p] [HEXMASK] PID | PROG ARGS"
+//usage:#define taskset_full_usage "\n\n"
+//usage:       "Set or get CPU affinity\n"
+//usage:     "\n	-p	Operate on an existing PID"
+//usage:
+//usage:#define taskset_example_usage
+//usage:       "$ taskset 0x7 ./dgemm_test&\n"
+//usage:       "$ taskset -p 0x1 $!\n"
+//usage:       "pid 4790's current affinity mask: 7\n"
+//usage:       "pid 4790's new affinity mask: 1\n"
+//usage:       "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n"
+//usage:       "pid 6671's current affinity mask: 1\n"
+//usage:       "pid 6671's new affinity mask: 1\n"
+//usage:       "$ taskset -p 1\n"
+//usage:       "pid 1's current affinity mask: 3\n"
+/*
+ * Not yet implemented:
+ * -a/--all-tasks (affect all threads)
+ *	needs to get TIDs from /proc/PID/task/ and use _them_ as "pid" in sched_setaffinity(pid)
+ * -c/--cpu-list  (specify CPUs via "1,3,5-7")
+ */
+
+#include <sched.h>
+#include "libbb.h"
+
+typedef unsigned long ul;
+#define SZOF_UL (unsigned)(sizeof(ul))
+#define BITS_UL (unsigned)(sizeof(ul)*8)
+#define MASK_UL (unsigned)(sizeof(ul)*8 - 1)
+
+#if ENABLE_FEATURE_TASKSET_FANCY
+#define TASKSET_PRINTF_MASK "%s"
+/* craft a string from the mask */
+static char *from_mask(const ul *mask, unsigned sz_in_bytes)
+{
+	char *str = xzalloc((sz_in_bytes+1) * 2); /* we will leak it */
+	char *p = str;
+	for (;;) {
+		ul v = *mask++;
+		if (SZOF_UL == 4)
+			p += sprintf(p, "%08lx", v);
+		if (SZOF_UL == 8)
+			p += sprintf(p, "%016lx", v);
+		if (SZOF_UL == 16)
+			p += sprintf(p, "%032lx", v); /* :) */
+		sz_in_bytes -= SZOF_UL;
+		if ((int)sz_in_bytes <= 0)
+			break;
+	}
+	while (str[0] == '0' && str[1])
+		str++;
+	return str;
+}
+#else
+#define TASKSET_PRINTF_MASK "%lx"
+static unsigned long long from_mask(ul *mask, unsigned sz_in_bytes UNUSED_PARAM)
+{
+	return *mask;
+}
+#endif
+
+static unsigned long *get_aff(int pid, unsigned *sz)
+{
+	int r;
+	unsigned long *mask = NULL;
+	unsigned sz_in_bytes = *sz;
+
+	for (;;) {
+		mask = xrealloc(mask, sz_in_bytes);
+		r = sched_getaffinity(pid, sz_in_bytes, (void*)mask);
+		if (r == 0)
+			break;
+		sz_in_bytes *= 2;
+		if (errno == EINVAL && (int)sz_in_bytes > 0)
+			continue;
+		bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid);
+	}
+	//bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes);
+	*sz = sz_in_bytes;
+	return mask;
+}
+
+int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int taskset_main(int argc UNUSED_PARAM, char **argv)
+{
+	ul *mask;
+	unsigned mask_size_in_bytes;
+	pid_t pid = 0;
+	unsigned opt_p;
+	const char *current_new;
+	char *aff;
+
+	/* NB: we mimic util-linux's taskset: -p does not take
+	 * an argument, i.e., "-pN" is NOT valid, only "-p N"!
+	 * Indeed, util-linux-2.13-pre7 uses:
+	 * getopt_long(argc, argv, "+pchV", ...), not "...p:..." */
+
+	opt_complementary = "-1"; /* at least 1 arg */
+	opt_p = getopt32(argv, "+p");
+	argv += optind;
+
+	aff = *argv++;
+	if (opt_p) {
+		char *pid_str = aff;
+		if (*argv) { /* "-p <aff> <pid> ...rest.is.ignored..." */
+			pid_str = *argv; /* NB: *argv != NULL in this case */
+		}
+		/* else it was just "-p <pid>", and *argv == NULL */
+		pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
+	} else {
+		/* <aff> <cmd...> */
+		if (!*argv)
+			bb_show_usage();
+	}
+
+	mask_size_in_bytes = SZOF_UL;
+	current_new = "current";
+ print_aff:
+	mask = get_aff(pid, &mask_size_in_bytes);
+	if (opt_p) {
+		printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
+				pid, current_new, from_mask(mask, mask_size_in_bytes));
+		if (*argv == NULL) {
+			/* Either it was just "-p <pid>",
+			 * or it was "-p <aff> <pid>" and we came here
+			 * for the second time (see goto below) */
+			return EXIT_SUCCESS;
+		}
+		*argv = NULL;
+		current_new = "new";
+	}
+	memset(mask, 0, mask_size_in_bytes);
+
+	/* Affinity was specified, translate it into mask */
+	/* it is always in hex, skip "0x" if it exists */
+	if (aff[0] == '0' && (aff[1]|0x20) == 'x')
+		aff += 2;
+
+	if (!ENABLE_FEATURE_TASKSET_FANCY) {
+		mask[0] = xstrtoul(aff, 16);
+	} else {
+		unsigned i;
+		char *last_char;
+
+		i = 0; /* bit pos in mask[] */
+
+		/* aff is ASCII hex string, accept very long masks in this form.
+		 * Process hex string AABBCCDD... to ulong mask[]
+		 * from the rightmost nibble, which is least-significant.
+		 * Bits not fitting into mask[] are ignored: (example: 1234
+		 * in 12340000000000000000000000000000000000000ff)
+		 */
+		last_char = strchrnul(aff, '\0');
+		while (last_char > aff) {
+			char c;
+			ul val;
+
+			last_char--;
+			c = *last_char;
+			if (isdigit(c))
+				val = c - '0';
+			else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
+				val = (c|0x20) - ('a' - 10);
+			else
+				bb_error_msg_and_die("bad affinity '%s'", aff);
+
+			if (i < mask_size_in_bytes * 8) {
+				mask[i / BITS_UL] |= val << (i & MASK_UL);
+				//bb_error_msg("bit %d set", i);
+			}
+			/* else:
+			 * We can error out here, but we don't.
+			 * For one, kernel itself ignores bits in mask[]
+			 * which do not map to any CPUs:
+			 * if mask[] has one 32-bit long element,
+			 * but you have only 8 CPUs, all bits beyond first 8
+			 * are ignored, silently.
+			 * No point in making bits past 31th to be errors.
+			 */
+			i += 4;
+		}
+	}
+
+	/* Set pid's or our own (pid==0) affinity */
+	if (sched_setaffinity(pid, mask_size_in_bytes, (void*)mask))
+		bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid);
+	//bb_error_msg("set mask[0]:%lx", mask[0]);
+
+	if (!argv[0]) /* "-p <aff> <pid> [...ignored...]" */
+		goto print_aff; /* print new affinity and exit */
+
+	BB_EXECVP_or_die(argv);
+}
diff --git a/util-linux/wall.c b/util-linux/wall.c
new file mode 100644
index 000000000..50658f457
--- /dev/null
+++ b/util-linux/wall.c
@@ -0,0 +1,63 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * wall - write a message to all logged-in users
+ * Copyright (c) 2009 Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//config:config WALL
+//config:	bool "wall"
+//config:	default y
+//config:	depends on FEATURE_UTMP
+//config:	help
+//config:	  Write a message to all users that are logged in.
+
+/* Needs to be run by root or be suid root - needs to write to /dev/TTY: */
+//applet:IF_WALL(APPLET(wall, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
+
+//kbuild:lib-$(CONFIG_WALL) += wall.o
+
+//usage:#define wall_trivial_usage
+//usage:	"[FILE]"
+//usage:#define wall_full_usage "\n\n"
+//usage:	"Write content of FILE or stdin to all logged-in users"
+//usage:
+//usage:#define wall_sample_usage
+//usage:	"echo foo | wall\n"
+//usage:	"wall ./mymessage"
+
+#include "libbb.h"
+
+int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int wall_main(int argc UNUSED_PARAM, char **argv)
+{
+	struct utmpx *ut;
+	char *msg;
+	int fd;
+
+	fd = STDIN_FILENO;
+	if (argv[1]) {
+		/* The applet is setuid.
+		 * Access to the file must be under user's uid/gid.
+		 */
+		fd = xopen_as_uid_gid(argv[1], O_RDONLY, getuid(), getgid());
+	}
+	msg = xmalloc_read(fd, NULL);
+	if (ENABLE_FEATURE_CLEAN_UP && argv[1])
+		close(fd);
+	setutxent();
+	while ((ut = getutxent()) != NULL) {
+		char *line;
+		if (ut->ut_type != USER_PROCESS)
+			continue;
+		line = concat_path_file("/dev", ut->ut_line);
+		xopen_xwrite_close(line, msg);
+		free(line);
+	}
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		endutxent();
+		free(msg);
+	}
+	return EXIT_SUCCESS;
+}