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Sort some miscutils/ applets into coreutils or util-linux

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-04-12 13:58:40 +02:00
parent ac47a00e2e
commit 783d57af7b
10 changed files with 0 additions and 0 deletions
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149
util-linux/chrt.c Normal file
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/* 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);
}

152
util-linux/eject.c Normal file
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/* 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;
}

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util-linux/ionice.c Normal file
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/* 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;
}

166
util-linux/last.c Normal file
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/* 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);
}

300
util-linux/last_fancy.c Normal file
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/* 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);
}

105
util-linux/mountpoint.c Normal file
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/* 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;
}

82
util-linux/setsid.c Normal file
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/* 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);
}

221
util-linux/taskset.c Normal file
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/* 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);
}

63
util-linux/wall.c Normal file
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/* 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;
}