Adding upstream version 2.39.3.upstream/2.39.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 853 insertions, 0 deletions

diff --git a/sys-utils/wdctl.c b/sys-utils/wdctl.c
new file mode 100644
index 0000000..2a656b8
--- /dev/null
+++ b/sys-utils/wdctl.c
@@ -0,0 +1,853 @@
+/*
+ * wdctl(8) - show hardware watchdog status
+ *
+ * Copyright (C) 2012 Lennart Poettering
+ * Copyright (C) 2012 Karel Zak <kzak@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <sys/ioctl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <signal.h>
+#include <assert.h>
+#include <linux/watchdog.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <libsmartcols.h>
+
+#include "nls.h"
+#include "c.h"
+#include "xalloc.h"
+#include "closestream.h"
+#include "optutils.h"
+#include "pathnames.h"
+#include "strutils.h"
+#include "carefulputc.h"
+#include "path.h"
+#include "strv.h"
+
+/*
+ * since 2.6.18
+ */
+#ifndef WDIOC_SETPRETIMEOUT
+# define WDIOC_SETPRETIMEOUT    _IOWR(WATCHDOG_IOCTL_BASE, 8, int)
+# define WDIOC_GETPRETIMEOUT	_IOR(WATCHDOG_IOCTL_BASE, 9, int)
+# define WDIOC_GETTIMELEFT	_IOR(WATCHDOG_IOCTL_BASE, 10, int)
+# define WDIOF_POWEROVER	0x0040	/* Power over voltage */
+# define WDIOF_SETTIMEOUT	0x0080  /* Set timeout (in seconds) */
+# define WDIOF_MAGICCLOSE	0x0100	/* Supports magic close char */
+# define WDIOF_PRETIMEOUT	0x0200  /* Pretimeout (in seconds), get/set */
+# define WDIOF_KEEPALIVEPING	0x8000	/* Keep alive ping reply */
+#endif
+
+/*
+ * since 3.5
+ */
+#ifndef WDIOF_ALARMONLY
+# define WDIOF_ALARMONLY	0x0400	/* Watchdog triggers a management or
+					   other external alarm not a reboot */
+#endif
+
+struct wdflag {
+	uint32_t	flag;
+	const char	*name;
+	const char	*description;
+};
+
+static const struct wdflag wdflags[] = {
+	{ WDIOF_CARDRESET,     "CARDRESET",  N_("Card previously reset the CPU") },
+	{ WDIOF_EXTERN1,       "EXTERN1",    N_("External relay 1") },
+	{ WDIOF_EXTERN2,       "EXTERN2",    N_("External relay 2") },
+	{ WDIOF_FANFAULT,      "FANFAULT",   N_("Fan failed") },
+	{ WDIOF_KEEPALIVEPING, "KEEPALIVEPING", N_("Keep alive ping reply") },
+	{ WDIOF_MAGICCLOSE,    "MAGICCLOSE", N_("Supports magic close char") },
+	{ WDIOF_OVERHEAT,      "OVERHEAT",   N_("Reset due to CPU overheat") },
+	{ WDIOF_POWEROVER,     "POWEROVER",  N_("Power over voltage") },
+	{ WDIOF_POWERUNDER,    "POWERUNDER", N_("Power bad/power fault") },
+	{ WDIOF_PRETIMEOUT,    "PRETIMEOUT", N_("Pretimeout (in seconds)") },
+	{ WDIOF_SETTIMEOUT,    "SETTIMEOUT", N_("Set timeout (in seconds)") },
+	{ WDIOF_ALARMONLY,     "ALARMONLY",  N_("Not trigger reboot") }
+};
+
+
+/* column names */
+struct colinfo {
+	const char *name; /* header */
+	double	   whint; /* width hint (N < 1 is in percent of termwidth) */
+	int	   flags; /* SCOLS_FL_* */
+	const char *help;
+};
+
+enum { COL_FLAG, COL_DESC, COL_STATUS, COL_BSTATUS, COL_DEVICE };
+
+/* columns descriptions */
+static struct colinfo infos[] = {
+	[COL_FLAG]    = { "FLAG",        14,  0, N_("flag name") },
+	[COL_DESC]    = { "DESCRIPTION", 0.1, SCOLS_FL_TRUNC, N_("flag description") },
+	[COL_STATUS]  = { "STATUS",      1,   SCOLS_FL_RIGHT, N_("flag status") },
+	[COL_BSTATUS] = { "BOOT-STATUS", 1,   SCOLS_FL_RIGHT, N_("flag boot status") },
+	[COL_DEVICE]  = { "DEVICE",      0.1, 0, N_("watchdog device name") }
+
+};
+
+static int columns[ARRAY_SIZE(infos) * 2];
+static int ncolumns;
+
+struct wd_device {
+	const char	*devpath;
+	struct path_cxt	*sysfs;
+
+	char		*governor;
+	char		**available_governors;
+
+	int		timeout;
+	int		timeleft;
+	int		pretimeout;
+
+	uint32_t	status;
+	uint32_t	bstatus;
+	int		nowayout;
+
+	struct watchdog_info ident;
+
+	unsigned int	has_timeout : 1,
+			has_timeleft : 1,
+			has_pretimeout : 1,
+			has_nowayout : 1,
+			no_sysfs : 1;
+};
+
+struct wd_control {
+	/* set */
+	int		timeout;			/* --settimeout */
+	int		pretimeout;			/* --setpretimeout */
+	const char      *governor;			/* --setpregovernor */
+	unsigned int	set_timeout : 1,
+			set_pretimeout : 1;
+
+	/* output */
+	unsigned int	show_oneline : 1,
+			show_raw : 1,
+			hide_headings : 1,
+			hide_flags : 1,
+			hide_ident : 1,
+			hide_timeouts : 1;
+};
+
+#define want_set(_ctl)		((_ctl)->set_timeout \
+				  || (_ctl)->set_pretimeout \
+				  || (_ctl)->governor)
+
+/* converts flag name to flag bit */
+static long name2bit(const char *name, size_t namesz)
+{
+	size_t i;
+
+	for (i = 0; i < ARRAY_SIZE(wdflags); i++) {
+		const char *cn = wdflags[i].name;
+		if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
+			return wdflags[i].flag;
+	}
+	warnx(_("unknown flag: %s"), name);
+	return -1;
+}
+
+static int column2id(const char *name, size_t namesz)
+{
+	size_t i;
+
+	for (i = 0; i < ARRAY_SIZE(infos); i++) {
+		const char *cn = infos[i].name;
+		if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
+			return i;
+	}
+	warnx(_("unknown column: %s"), name);
+	return -1;
+}
+
+static int get_column_id(int num)
+{
+	assert(num < ncolumns);
+	assert(columns[num] < (int) ARRAY_SIZE(infos));
+
+	return columns[num];
+}
+
+static struct colinfo *get_column_info(unsigned num)
+{
+	return &infos[ get_column_id(num) ];
+}
+
+/* We preffer cdev /dev/watchdog0 as this device has node in
+ * /sys/class/watchdog/. The old miscdev /dev/watchdog is fallback for old
+ * systemds only.
+ */
+static const char *get_default_device(void)
+{
+	const char **p;
+	static const char *devs[] = {
+		"/dev/watchdog0",
+		"/dev/watchdog",
+		NULL
+	};
+
+	for (p = devs; *p; p++) {
+		if (access(*p, F_OK) == 0)
+			return *p;
+	}
+
+	return NULL;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	size_t i;
+	const char *dflt = get_default_device();
+
+	fputs(USAGE_HEADER, out);
+	fprintf(out,
+	      _(" %s [options] [<device> ...]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Show the status of the hardware watchdog.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -f, --flags <list>     print selected flags only\n"
+		" -F, --noflags          don't print information about flags\n"
+		" -I, --noident          don't print watchdog identity information\n"
+		" -n, --noheadings       don't print headings for flags table\n"
+		" -O, --oneline          print all information on one line\n"
+		" -o, --output <list>    output columns of the flags\n"
+		" -p, --setpretimeout <sec> set watchdog pre-timeout\n"
+		" -g, --setpregovernor <name> set pre-timeout governor\n"
+		" -r, --raw              use raw output format for flags table\n"
+		" -T, --notimeouts       don't print watchdog timeouts\n"
+		" -s, --settimeout <sec> set watchdog timeout\n"
+		" -x, --flags-only       print only flags table (same as -I -T)\n"), out);
+
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(24));
+	fputs(USAGE_SEPARATOR, out);
+
+	if (dflt)
+		fprintf(out, _("The default device is %s.\n"), dflt);
+	else
+		fprintf(out, _("No default device is available.\n"));
+
+	fputs(USAGE_COLUMNS, out);
+	for (i = 0; i < ARRAY_SIZE(infos); i++)
+		fprintf(out, " %13s  %s\n", infos[i].name, _(infos[i].help));
+
+	printf(USAGE_MAN_TAIL("wdctl(8)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+static struct path_cxt *get_sysfs(struct wd_device *wd)
+{
+	struct path_cxt *sys;
+	struct stat st;
+
+	if (wd->no_sysfs)
+		return NULL;
+	if (wd->sysfs)
+		return wd->sysfs;
+	if (stat(wd->devpath, &st) != 0)
+		goto nosysfs;
+
+	sys = ul_new_path(_PATH_SYS_DEVCHAR "/%u:%u",
+			major(st.st_rdev), minor(st.st_rdev));
+	if (!sys)
+		return NULL;
+
+	if (ul_path_get_dirfd(sys) < 0)
+		goto nosysfs;		/* device not in /sys */
+
+	if (ul_path_access(sys, F_OK, "identity") != 0)
+		goto nosysfs;		/* no info in /sys (old miscdev?) */
+
+	wd->sysfs = sys;
+	return sys;
+nosysfs:
+	wd->no_sysfs = 1;
+	return NULL;
+}
+
+static void add_flag_line(struct libscols_table *table, struct wd_device *wd, const struct wdflag *fl)
+{
+	int i;
+	struct libscols_line *line;
+
+	line = scols_table_new_line(table, NULL);
+	if (!line) {
+		warn(_("failed to allocate output line"));
+		return;
+	}
+
+	for (i = 0; i < ncolumns; i++) {
+		const char *str = NULL;
+
+		switch (get_column_id(i)) {
+		case COL_FLAG:
+			str = fl->name;
+			break;
+		case COL_DESC:
+			str = fl->description;
+			break;
+		case COL_STATUS:
+			str = wd->status & fl->flag ? "1" : "0";
+			break;
+		case COL_BSTATUS:
+			str = wd->bstatus & fl->flag ? "1" : "0";
+			break;
+		case COL_DEVICE:
+			str = wd->devpath;
+			break;
+		default:
+			break;
+		}
+
+		if (str && scols_line_set_data(line, i, str)) {
+			warn(_("failed to add output data"));
+			break;
+		}
+	}
+}
+
+static int show_flags(struct wd_control *ctl, struct wd_device *wd, uint32_t wanted)
+{
+	size_t i;
+	int rc = -1;
+	struct libscols_table *table;
+	uint32_t flags;
+
+	/* information about supported bits is probably missing in /sys */
+	if (!wd->ident.options)
+		return 0;
+
+	scols_init_debug(0);
+
+	/* create output table */
+	table = scols_new_table();
+	if (!table) {
+		warn(_("failed to allocate output table"));
+		return -1;
+	}
+	scols_table_enable_raw(table, ctl->show_raw);
+	scols_table_enable_noheadings(table, ctl->hide_headings);
+
+	/* define columns */
+	for (i = 0; i < (size_t) ncolumns; i++) {
+		struct colinfo *col = get_column_info(i);
+
+		if (!scols_table_new_column(table, col->name, col->whint, col->flags)) {
+			warnx(_("failed to allocate output column"));
+			goto done;
+		}
+	}
+
+	/* fill-in table with data
+	 * -- one line for each supported flag (option)	 */
+	flags = wd->ident.options;
+
+	for (i = 0; i < ARRAY_SIZE(wdflags); i++) {
+		if (wanted && !(wanted & wdflags[i].flag))
+			; /* ignore */
+		else if (flags & wdflags[i].flag)
+			add_flag_line(table, wd, &wdflags[i]);
+
+		flags &= ~wdflags[i].flag;
+	}
+
+	if (flags)
+		warnx(_("%s: unknown flags 0x%x\n"), wd->devpath, flags);
+
+	scols_print_table(table);
+	rc = 0;
+done:
+	scols_unref_table(table);
+	return rc;
+}
+
+/*
+ * Warning: successfully opened watchdog has to be properly closed with magic
+ * close character otherwise the machine will be rebooted!
+ *
+ * Don't use err() or exit() here!
+ */
+static int set_watchdog(struct wd_control *ctl, struct wd_device *wd)
+{
+	int fd;
+	sigset_t sigs, oldsigs;
+	int rc = 0;
+
+	assert(wd);
+	assert(wd->devpath);
+	assert(ctl);
+
+	if (!ctl->set_timeout && !ctl->set_timeout)
+		goto sysfs_only;
+
+	sigemptyset(&oldsigs);
+	sigfillset(&sigs);
+	sigprocmask(SIG_BLOCK, &sigs, &oldsigs);
+
+	fd = open(wd->devpath, O_WRONLY|O_CLOEXEC);
+
+	if (fd < 0) {
+		if (errno == EBUSY)
+			warnx(_("%s: watchdog already in use, terminating."),
+					wd->devpath);
+		warn(_("cannot open %s"), wd->devpath);
+		return -1;
+	}
+
+	for (;;) {
+		/* We just opened this to query the state, not to arm
+		 * it hence use the magic close character */
+		static const char v = 'V';
+
+		if (write(fd, &v, 1) >= 0)
+			break;
+		if (errno != EINTR) {
+			warn(_("%s: failed to disarm watchdog"), wd->devpath);
+			break;
+		}
+		/* Let's try hard, since if we don't get this right
+		 * the machine might end up rebooting. */
+	}
+
+	if (ctl->set_timeout) {
+		if (ioctl(fd, WDIOC_SETTIMEOUT, &ctl->timeout) != 0) {
+			rc += errno;
+			warn(_("cannot set timeout for %s"), wd->devpath);
+		} else
+			printf(P_("Timeout has been set to %d second.\n",
+				  "Timeout has been set to %d seconds.\n",
+				  ctl->timeout), ctl->timeout);
+	}
+
+	if (ctl->set_pretimeout) {
+		if (ioctl(fd, WDIOC_SETPRETIMEOUT, &ctl->pretimeout) != 0) {
+			rc += errno;
+			warn(_("cannot set pretimeout for %s"), wd->devpath);
+		} else
+			printf(P_("Pre-timeout has been set to %d second.\n",
+				  "Pre-timeout has been set to %d seconds.\n",
+				  ctl->pretimeout), ctl->pretimeout);
+	}
+
+	if (close(fd))
+		warn(_("write failed"));
+
+	sigprocmask(SIG_SETMASK, &oldsigs, NULL);
+
+sysfs_only:
+	if (ctl->governor) {
+		struct path_cxt *sys = get_sysfs(wd);
+		int xrc;
+
+		xrc = !sys ? errno :
+			     ul_path_write_string(sys, ctl->governor,
+						"pretimeout_governor");
+		if (xrc)
+			warn(_("cannot set pre-timeout governor"));
+		rc += xrc;
+	}
+
+	return rc;
+}
+
+/*
+ * Warning: successfully opened watchdog has to be properly closed with magic
+ * close character otherwise the machine will be rebooted!
+ *
+ * Don't use err() or exit() here!
+ */
+static int read_watchdog_from_device(struct wd_device *wd)
+{
+	int fd;
+	sigset_t sigs, oldsigs;
+
+	assert(wd->devpath);
+
+	sigemptyset(&oldsigs);
+	sigfillset(&sigs);
+	sigprocmask(SIG_BLOCK, &sigs, &oldsigs);
+
+	fd = open(wd->devpath, O_WRONLY|O_CLOEXEC);
+
+	if (fd < 0)
+		return -errno;
+
+	if (ioctl(fd, WDIOC_GETSUPPORT, &wd->ident) < 0)
+		warn(_("%s: failed to get information about watchdog"), wd->devpath);
+	else {
+		ioctl(fd, WDIOC_GETSTATUS, &wd->status);
+		ioctl(fd, WDIOC_GETBOOTSTATUS, &wd->bstatus);
+
+		/*
+		 * Sometimes supported options like WDIOF_CARDRESET are missing from
+		 * ident.options, add anything set in status/bstatus to ident.options.
+		 */
+		wd->ident.options |= wd->status;
+		wd->ident.options |= wd->bstatus;
+
+		if (ioctl(fd, WDIOC_GETTIMEOUT, &wd->timeout) >= 0)
+			wd->has_timeout = 1;
+		if (ioctl(fd, WDIOC_GETPRETIMEOUT, &wd->pretimeout) >= 0)
+			wd->has_pretimeout = 1;
+		if (ioctl(fd, WDIOC_GETTIMELEFT, &wd->timeleft) >= 0)
+			wd->has_timeleft = 1;
+	}
+
+	for (;;) {
+		/* We just opened this to query the state, not to arm
+		 * it hence use the magic close character */
+		static const char v = 'V';
+
+		if (write(fd, &v, 1) >= 0)
+			break;
+		if (errno != EINTR) {
+			warn(_("%s: failed to disarm watchdog"), wd->devpath);
+			break;
+		}
+		/* Let's try hard, since if we don't get this right
+		 * the machine might end up rebooting. */
+	}
+
+	if (close(fd))
+		warn(_("write failed"));
+	sigprocmask(SIG_SETMASK, &oldsigs, NULL);
+
+	return 0;
+}
+
+
+/* Returns: <0 error, 0 success, 1 unssuported */
+static int read_watchdog_from_sysfs(struct wd_device *wd)
+{
+	struct path_cxt *sys;
+
+	sys = get_sysfs(wd);
+	if (!sys)
+		return 1;
+
+	ul_path_read_buffer(sys, (char *) wd->ident.identity, sizeof(wd->ident.identity), "identity");
+	ul_path_read_u32(sys, &wd->ident.firmware_version, "fw_version");
+	ul_path_scanf(sys, "options", "%x", &wd->ident.options);
+
+	ul_path_scanf(sys, "status", "%x", &wd->status);
+	ul_path_read_u32(sys, &wd->bstatus, "bootstatus");
+
+	if (ul_path_read_s32(sys, &wd->nowayout, "nowayout") == 0)
+		wd->has_nowayout = 1;
+	if (ul_path_read_s32(sys, &wd->timeout, "timeout") == 0)
+		wd->has_timeout = 1;
+	if (ul_path_read_s32(sys, &wd->pretimeout, "pretimeout") == 0)
+		wd->has_pretimeout = 1;
+	if (ul_path_read_s32(sys, &wd->timeleft, "timeleft") == 0)
+		wd->has_timeleft = 1;
+
+	return 0;
+}
+
+static int read_governors(struct wd_device *wd)
+{
+	struct path_cxt *sys;
+	FILE *f;
+
+	sys = get_sysfs(wd);
+	if (!sys)
+		return 1;
+
+	f = ul_path_fopen(sys, "r", "pretimeout_available_governors");
+	if (f) {
+		char *line = NULL;
+		size_t dummy = 0;
+		ssize_t sz;
+
+		while ((sz = getline(&line, &dummy, f)) >= 0) {
+			if (rtrim_whitespace((unsigned char *) line) == 0)
+				continue;
+			strv_consume(&wd->available_governors, line);
+			dummy = 0;
+			line = NULL;
+		}
+		free(line);
+		fclose(f);
+	}
+
+	ul_path_read_string(sys, &wd->governor,  "pretimeout_governor");
+	return 0;
+}
+
+static int read_watchdog(struct wd_device *wd)
+{
+	int rc = read_watchdog_from_device(wd);
+
+	if (rc == -EBUSY || rc == -EACCES || rc == -EPERM)
+		rc = read_watchdog_from_sysfs(wd);
+
+	if (rc) {
+		warn(_("cannot read information about %s"), wd->devpath);
+		return -1;
+	}
+
+	read_governors(wd);
+	return 0;
+}
+
+static void show_timeouts(struct wd_device *wd)
+{
+	if (wd->has_timeout)
+		printf(P_("%-14s %2i second\n", "%-14s %2i seconds\n", wd->timeout),
+			  _("Timeout:"), wd->timeout);
+	if (wd->has_timeleft)
+		printf(P_("%-14s %2i second\n", "%-14s %2i seconds\n", wd->timeleft),
+			  _("Timeleft:"), wd->timeleft);
+	if (wd->has_pretimeout)
+		printf(P_("%-14s %2i second\n", "%-14s %2i seconds\n", wd->pretimeout),
+			  _("Pre-timeout:"), wd->pretimeout);
+}
+
+static void show_governors(struct wd_device *wd)
+{
+	if (wd->governor)
+		printf(_("%-14s %s\n"), _("Pre-timeout governor:"), wd->governor);
+	if (wd->available_governors) {
+		char *tmp = strv_join(wd->available_governors, " ");
+
+		if (tmp)
+			printf(_("%-14s %s\n"),
+				_("Available pre-timeout governors:"), tmp);
+		free(tmp);
+	}
+}
+
+static void print_oneline(struct wd_control *ctl, struct wd_device *wd, uint32_t wanted)
+{
+	printf("%s:", wd->devpath);
+
+	if (!ctl->hide_ident) {
+		printf(" VERSION=\"%x\"", wd->ident.firmware_version);
+
+		printf(" IDENTITY=");
+		fputs_quoted((char *) wd->ident.identity, stdout);
+	}
+	if (!ctl->hide_timeouts) {
+		if (wd->has_timeout)
+			printf(" TIMEOUT=\"%i\"", wd->timeout);
+		if (wd->has_pretimeout)
+			printf(" PRETIMEOUT=\"%i\"", wd->pretimeout);
+		if (wd->has_timeleft)
+			printf(" TIMELEFT=\"%i\"", wd->timeleft);
+	}
+
+	if (!ctl->hide_flags) {
+		size_t i;
+		uint32_t flags = wd->ident.options;
+
+		for (i = 0; i < ARRAY_SIZE(wdflags); i++) {
+			const struct wdflag *fl;
+
+			if ((wanted && !(wanted & wdflags[i].flag)) ||
+			    !(flags & wdflags[i].flag))
+				continue;
+
+			fl= &wdflags[i];
+
+			printf(" %s=\"%s\"", fl->name,
+					     wd->status & fl->flag ? "1" : "0");
+			printf(" %s_BOOT=\"%s\"", fl->name,
+					     wd->bstatus & fl->flag ? "1" : "0");
+
+		}
+	}
+
+	fputc('\n', stdout);
+}
+
+static void print_device(struct wd_control *ctl, struct wd_device *wd, uint32_t wanted)
+{
+	/* NAME=value one line output */
+	if (ctl->show_oneline) {
+		print_oneline(ctl, wd, wanted);
+		return;
+	}
+
+	/* pretty output */
+	if (!ctl->hide_ident) {
+		printf("%-15s%s\n", _("Device:"), wd->devpath);
+		printf("%-15s%s [%s %x]\n",
+				_("Identity:"),
+				wd->ident.identity,
+				_("version"),
+				wd->ident.firmware_version);
+	}
+	if (!ctl->hide_timeouts)
+		show_timeouts(wd);
+
+	show_governors(wd);
+
+	if (!ctl->hide_flags)
+		show_flags(ctl, wd, wanted);
+}
+
+int main(int argc, char *argv[])
+{
+	struct wd_device wd;
+	struct wd_control ctl = { .hide_headings = 0 };
+	int c, res = EXIT_SUCCESS, count = 0;
+	unsigned long wanted = 0;
+	const char *dflt_device = NULL;
+
+	static const struct option long_opts[] = {
+		{ "flags",      required_argument, NULL, 'f' },
+		{ "flags-only", no_argument,       NULL, 'x' },
+		{ "help",	no_argument,       NULL, 'h' },
+		{ "noflags",    no_argument,       NULL, 'F' },
+		{ "noheadings", no_argument,       NULL, 'n' },
+		{ "noident",	no_argument,       NULL, 'I' },
+		{ "notimeouts", no_argument,       NULL, 'T' },
+		{ "settimeout", required_argument, NULL, 's' },
+		{ "setpretimeout", required_argument, NULL, 'p' },
+		{ "setpregovernor", required_argument, NULL, 'g' },
+		{ "output",     required_argument, NULL, 'o' },
+		{ "oneline",    no_argument,       NULL, 'O' },
+		{ "raw",        no_argument,       NULL, 'r' },
+		{ "version",    no_argument,       NULL, 'V' },
+		{ NULL, 0, NULL, 0 }
+	};
+
+	static const ul_excl_t excl[] = {       /* rows and cols in ASCII order */
+		{ 'F','f' },			/* noflags,flags*/
+		{ 0 }
+	};
+	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	while ((c = getopt_long(argc, argv,
+				"d:f:g:hFnITp:o:s:OrVx", long_opts, NULL)) != -1) {
+
+		err_exclusive_options(c, long_opts, excl, excl_st);
+
+		switch(c) {
+		case 'o':
+			ncolumns = string_to_idarray(optarg,
+						     columns, ARRAY_SIZE(columns),
+						     column2id);
+			if (ncolumns < 0)
+				return EXIT_FAILURE;
+			break;
+		case 's':
+			ctl.timeout = strtos32_or_err(optarg, _("invalid timeout argument"));
+			ctl.set_timeout = 1;
+			break;
+		case 'p':
+			ctl.pretimeout = strtos32_or_err(optarg, _("invalid pretimeout argument"));
+			ctl.set_pretimeout = 1;
+			break;
+		case 'f':
+			if (string_to_bitmask(optarg, &wanted, name2bit) != 0)
+				return EXIT_FAILURE;
+			break;
+		case 'F':
+			ctl.hide_flags = 1;
+			break;
+		case 'g':
+			ctl.governor = optarg;
+			break;
+		case 'I':
+			ctl.hide_ident = 1;
+			break;
+		case 'T':
+			ctl.hide_timeouts = 1;
+			break;
+		case 'n':
+			ctl.hide_headings = 1;
+			break;
+		case 'r':
+			ctl.show_raw = 1;
+			break;
+		case 'O':
+			ctl.show_oneline = 1;
+			break;
+		case 'x':
+			ctl.hide_ident = 1;
+			ctl.hide_timeouts = 1;
+			break;
+
+		case 'h':
+			usage();
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	if (!ncolumns) {
+		/* default columns */
+		columns[ncolumns++] = COL_FLAG;
+		columns[ncolumns++] = COL_DESC;
+		columns[ncolumns++] = COL_STATUS;
+		columns[ncolumns++] = COL_BSTATUS;
+	}
+
+	/* Device no specified, use default. */
+	if (optind == argc) {
+		dflt_device = get_default_device();
+		if (!dflt_device)
+			err(EXIT_FAILURE, _("No default device is available."));
+	}
+
+	do {
+		int rc;
+
+		memset(&wd, 0, sizeof(wd));
+		wd.devpath = dflt_device ? dflt_device : argv[optind++];
+
+		if (count)
+			fputc('\n', stdout);
+		count++;
+
+		if (want_set(&ctl)) {
+			rc = set_watchdog(&ctl, &wd);
+			if (rc) {
+				res = EXIT_FAILURE;
+			}
+		}
+
+		rc = read_watchdog(&wd);
+		if (rc) {
+			res = EXIT_FAILURE;
+			continue;
+		}
+
+		print_device(&ctl, &wd, wanted);
+		ul_unref_path(wd.sysfs);
+	} while (optind < argc);
+
+	return res;
+}