[qemu.git] / cmd.c

/*
 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it would 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, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/time.h>
#include <getopt.h>

#include "cmd.h"
#include "qemu-aio.h"

#define _(x)	x	/* not gettext support yet */

/* from libxcmd/command.c */

cmdinfo_t	*cmdtab;
int		ncmds;

static argsfunc_t	args_func;
static checkfunc_t	check_func;
static int		ncmdline;
static char		**cmdline;

static int
compare(const void *a, const void *b)
{
	return strcmp(((const cmdinfo_t *)a)->name,
		      ((const cmdinfo_t *)b)->name);
}

void
add_command(
	const cmdinfo_t	*ci)
{
	cmdtab = realloc((void *)cmdtab, ++ncmds * sizeof(*cmdtab));
	cmdtab[ncmds - 1] = *ci;
	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
}

static int
check_command(
	const cmdinfo_t	*ci)
{
	if (check_func)
		return check_func(ci);
	return 1;
}

void
add_check_command(
	checkfunc_t	cf)
{
	check_func = cf;
}

int
command_usage(
	const cmdinfo_t *ci)
{
	printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
	return 0;
}

int
command(
	const cmdinfo_t	*ct,
	int		argc,
	char		**argv)
{
	char		*cmd = argv[0];

	if (!check_command(ct))
		return 0;

	if (argc-1 < ct->argmin || (ct->argmax != -1 && argc-1 > ct->argmax)) {
		if (ct->argmax == -1)
			fprintf(stderr,
	_("bad argument count %d to %s, expected at least %d arguments\n"),
				argc-1, cmd, ct->argmin);
		else if (ct->argmin == ct->argmax)
			fprintf(stderr,
	_("bad argument count %d to %s, expected %d arguments\n"),
				argc-1, cmd, ct->argmin);
		else
			fprintf(stderr,
	_("bad argument count %d to %s, expected between %d and %d arguments\n"),
			argc-1, cmd, ct->argmin, ct->argmax);
		return 0;
	}
	optind = 0;
	return ct->cfunc(argc, argv);
}

const cmdinfo_t *
find_command(
	const char	*cmd)
{
	cmdinfo_t	*ct;

	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
		if (strcmp(ct->name, cmd) == 0 ||
		    (ct->altname && strcmp(ct->altname, cmd) == 0))
			return (const cmdinfo_t *)ct;
	}
	return NULL;
}

void
add_user_command(char *optarg)
{
	ncmdline++;
	cmdline = realloc(cmdline, sizeof(char*) * (ncmdline));
	if (!cmdline) {
		perror("realloc");
		exit(1);
	}
	cmdline[ncmdline-1] = optarg;
}

static int
args_command(
	int	index)
{
	if (args_func)
		return args_func(index);
	return 0;
}

void
add_args_command(
	argsfunc_t	af)
{
	args_func = af;
}

static void prep_fetchline(void *opaque)
{
    int *fetchable = opaque;

    qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
    *fetchable= 1;
}

static char *get_prompt(void);

void
command_loop(void)
{
	int		c, i, j = 0, done = 0, fetchable = 0, prompted = 0;
	char		*input;
	char		**v;
	const cmdinfo_t	*ct;

	for (i = 0; !done && i < ncmdline; i++) {
		input = strdup(cmdline[i]);
		if (!input) {
			fprintf(stderr,
				_("cannot strdup command '%s': %s\n"),
				cmdline[i], strerror(errno));
			exit(1);
		}
		v = breakline(input, &c);
		if (c) {
			ct = find_command(v[0]);
			if (ct) {
				if (ct->flags & CMD_FLAG_GLOBAL)
					done = command(ct, c, v);
				else {
					j = 0;
					while (!done && (j = args_command(j)))
						done = command(ct, c, v);
				}
			} else
				fprintf(stderr, _("command \"%s\" not found\n"),
					v[0]);
		}
		doneline(input, v);
	}
	if (cmdline) {
		free(cmdline);
		return;
	}

	while (!done) {
        if (!prompted) {
            printf("%s", get_prompt());
            fflush(stdout);
            qemu_aio_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, NULL,
                                    NULL, &fetchable);
            prompted = 1;
        }

        qemu_aio_wait();

        if (!fetchable) {
            continue;
        }
		if ((input = fetchline()) == NULL)
			break;
		v = breakline(input, &c);
		if (c) {
			ct = find_command(v[0]);
			if (ct)
				done = command(ct, c, v);
			else
				fprintf(stderr, _("command \"%s\" not found\n"),
					v[0]);
		}
		doneline(input, v);

        prompted = 0;
        fetchable = 0;
	}
    qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
}

/* from libxcmd/input.c */

#if defined(ENABLE_READLINE)
# include <readline/history.h>
# include <readline/readline.h>
#elif defined(ENABLE_EDITLINE)
# include <histedit.h>
#endif

static char *
get_prompt(void)
{
	static char	prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];

	if (!prompt[0])
		snprintf(prompt, sizeof(prompt), "%s> ", progname);
	return prompt;
}

#if defined(ENABLE_READLINE)
char *
fetchline(void)
{
	char	*line;

	line = readline(get_prompt());
	if (line && *line)
		add_history(line);
	return line;
}
#elif defined(ENABLE_EDITLINE)
static char *el_get_prompt(EditLine *e) { return get_prompt(); }
char *
fetchline(void)
{
	static EditLine	*el;
	static History	*hist;
	HistEvent	hevent;
	char		*line;
	int		count;

	if (!el) {
		hist = history_init();
		history(hist, &hevent, H_SETSIZE, 100);
		el = el_init(progname, stdin, stdout, stderr);
		el_source(el, NULL);
		el_set(el, EL_SIGNAL, 1);
		el_set(el, EL_PROMPT, el_get_prompt);
		el_set(el, EL_HIST, history, (const char *)hist);
	}
	line = strdup(el_gets(el, &count));
	if (line) {
		if (count > 0)
			line[count-1] = '\0';
		if (*line)
			history(hist, &hevent, H_ENTER, line);
	}
	return line;
}
#else
# define MAXREADLINESZ	1024
char *
fetchline(void)
{
	char	*p, *line = malloc(MAXREADLINESZ);

	if (!line)
		return NULL;
	if (!fgets(line, MAXREADLINESZ, stdin)) {
		free(line);
		return NULL;
	}
	p = line + strlen(line);
	if (p != line && p[-1] == '\n')
		p[-1] = '\0';
	return line;
}
#endif

static char *qemu_strsep(char **input, const char *delim)
{
    char *result = *input;
    if (result != NULL) {
        char *p;

        for (p = result; *p != '\0'; p++) {
            if (strchr(delim, *p)) {
                break;
            }
        }
        if (*p == '\0') {
            *input = NULL;
        } else {
            *p = '\0';
            *input = p + 1;
        }
    }
    return result;
}

char **
breakline(
	char	*input,
	int	*count)
{
	int	c = 0;
	char	*p;
	char	**rval = calloc(sizeof(char *), 1);

	while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
		if (!*p)
			continue;
		c++;
		rval = realloc(rval, sizeof(*rval) * (c + 1));
		if (!rval) {
			c = 0;
			break;
		}
		rval[c - 1] = p;
		rval[c] = NULL;
	}
	*count = c;
	return rval;
}

void
doneline(
	char	*input,
	char	**vec)
{
	free(input);
	free(vec);
}

#define EXABYTES(x)	((long long)(x) << 60)
#define PETABYTES(x)	((long long)(x) << 50)
#define TERABYTES(x)	((long long)(x) << 40)
#define GIGABYTES(x)	((long long)(x) << 30)
#define MEGABYTES(x)	((long long)(x) << 20)
#define KILOBYTES(x)	((long long)(x) << 10)

long long
cvtnum(
	char		*s)
{
	long long	i;
	char		*sp;
	int		c;

	i = strtoll(s, &sp, 0);
	if (i == 0 && sp == s)
		return -1LL;
	if (*sp == '\0')
		return i;

	if (sp[1] != '\0')
		return -1LL;

	c = tolower(*sp);
	switch (c) {
	default:
		return i;
	case 'k':
		return KILOBYTES(i);
	case 'm':
		return MEGABYTES(i);
	case 'g':
		return GIGABYTES(i);
	case 't':
		return TERABYTES(i);
	case 'p':
		return PETABYTES(i);
	case 'e':
		return  EXABYTES(i);
	}
	return -1LL;
}

#define TO_EXABYTES(x)	((x) / EXABYTES(1))
#define TO_PETABYTES(x)	((x) / PETABYTES(1))
#define TO_TERABYTES(x)	((x) / TERABYTES(1))
#define TO_GIGABYTES(x)	((x) / GIGABYTES(1))
#define TO_MEGABYTES(x)	((x) / MEGABYTES(1))
#define TO_KILOBYTES(x)	((x) / KILOBYTES(1))

void
cvtstr(
	double		value,
	char		*str,
	size_t		size)
{
	const char	*fmt;
	int		precise;

	precise = ((double)value * 1000 == (double)(int)value * 1000);

	if (value >= EXABYTES(1)) {
		fmt = precise ? "%.f EiB" : "%.3f EiB";
		snprintf(str, size, fmt, TO_EXABYTES(value));
	} else if (value >= PETABYTES(1)) {
		fmt = precise ? "%.f PiB" : "%.3f PiB";
		snprintf(str, size, fmt, TO_PETABYTES(value));
	} else if (value >= TERABYTES(1)) {
		fmt = precise ? "%.f TiB" : "%.3f TiB";
		snprintf(str, size, fmt, TO_TERABYTES(value));
	} else if (value >= GIGABYTES(1)) {
		fmt = precise ? "%.f GiB" : "%.3f GiB";
		snprintf(str, size, fmt, TO_GIGABYTES(value));
	} else if (value >= MEGABYTES(1)) {
		fmt = precise ? "%.f MiB" : "%.3f MiB";
		snprintf(str, size, fmt, TO_MEGABYTES(value));
	} else if (value >= KILOBYTES(1)) {
		fmt = precise ? "%.f KiB" : "%.3f KiB";
		snprintf(str, size, fmt, TO_KILOBYTES(value));
	} else {
		snprintf(str, size, "%f bytes", value);
	}
}

struct timeval
tsub(struct timeval t1, struct timeval t2)
{
	t1.tv_usec -= t2.tv_usec;
	if (t1.tv_usec < 0) {
		t1.tv_usec += 1000000;
		t1.tv_sec--;
	}
	t1.tv_sec -= t2.tv_sec;
	return t1;
}

double
tdiv(double value, struct timeval tv)
{
	return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
}

#define HOURS(sec)	((sec) / (60 * 60))
#define MINUTES(sec)	(((sec) % (60 * 60)) / 60)
#define SECONDS(sec)	((sec) % 60)

void
timestr(
	struct timeval	*tv,
	char		*ts,
	size_t		size,
	int		format)
{
	double		usec = (double)tv->tv_usec / 1000000.0;

	if (format & TERSE_FIXED_TIME) {
		if (!HOURS(tv->tv_sec)) {
			snprintf(ts, size, "%u:%02u.%02u",
				(unsigned int) MINUTES(tv->tv_sec),
				(unsigned int) SECONDS(tv->tv_sec),
				(unsigned int) (usec * 100));
			return;
		}
		format |= VERBOSE_FIXED_TIME;	/* fallback if hours needed */
	}

	if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
		snprintf(ts, size, "%u:%02u:%02u.%02u",
			(unsigned int) HOURS(tv->tv_sec),
			(unsigned int) MINUTES(tv->tv_sec),
			(unsigned int) SECONDS(tv->tv_sec),
			(unsigned int) (usec * 100));
	} else {
		snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
	}
}


/* from libxcmd/quit.c */

static cmdinfo_t quit_cmd;

/* ARGSUSED */
static int
quit_f(
	int	argc,
	char	**argv)
{
	return 1;
}

void
quit_init(void)
{
	quit_cmd.name = _("quit");
	quit_cmd.altname = _("q");
	quit_cmd.cfunc = quit_f;
	quit_cmd.argmin = -1;
	quit_cmd.argmax = -1;
	quit_cmd.flags = CMD_FLAG_GLOBAL;
	quit_cmd.oneline = _("exit the program");

	add_command(&quit_cmd);
}

/* from libxcmd/help.c */

static cmdinfo_t help_cmd;
static void help_onecmd(const char *cmd, const cmdinfo_t *ct);
static void help_oneline(const char *cmd, const cmdinfo_t *ct);

static void
help_all(void)
{
	const cmdinfo_t	*ct;

	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++)
		help_oneline(ct->name, ct);
	printf(_("\nUse 'help commandname' for extended help.\n"));
}

static int
help_f(
	int		argc,
	char		**argv)
{
	const cmdinfo_t	*ct;

	if (argc == 1) {
		help_all();
		return 0;
	}
	ct = find_command(argv[1]);
	if (ct == NULL) {
		printf(_("command %s not found\n"), argv[1]);
		return 0;
	}
	help_onecmd(argv[1], ct);
	return 0;
}

static void
help_onecmd(
	const char	*cmd,
	const cmdinfo_t	*ct)
{
	help_oneline(cmd, ct);
	if (ct->help)
		ct->help();
}

static void
help_oneline(
	const char	*cmd,
	const cmdinfo_t	*ct)
{
	if (cmd)
		printf("%s ", cmd);
	else {
		printf("%s ", ct->name);
		if (ct->altname)
			printf("(or %s) ", ct->altname);
	}
	if (ct->args)
		printf("%s ", ct->args);
	printf("-- %s\n", ct->oneline);
}

void
help_init(void)
{
	help_cmd.name = _("help");
	help_cmd.altname = _("?");
	help_cmd.cfunc = help_f;
	help_cmd.argmin = 0;
	help_cmd.argmax = 1;
	help_cmd.flags = CMD_FLAG_GLOBAL;
	help_cmd.args = _("[command]");
	help_cmd.oneline = _("help for one or all commands");

	add_command(&help_cmd);
}
Commit	Line	Data
e3aff4f6 AL	1	/*
	2	* Copyright (c) 2003-2005 Silicon Graphics, Inc.
	3	* All Rights Reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
8167ee88	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
e3aff4f6 AL	16	*/
	17
	18	#include <stdio.h>
	19	#include <stdlib.h>
	20	#include <string.h>
	21	#include <ctype.h>
	22	#include <errno.h>
c32d766a	23	#include <sys/time.h>
22a2bdcb	24	#include <getopt.h>
e3aff4f6 AL	25
e3aff4f6 AL	26	#include "cmd.h"
7d7d975c	27	#include "qemu-aio.h"
e3aff4f6 AL	28
	29	#define _(x) x /* not gettext support yet */
	30
e3aff4f6 AL	31	/* from libxcmd/command.c */
	32
	33	cmdinfo_t *cmdtab;
	34	int ncmds;
	35
	36	static argsfunc_t args_func;
	37	static checkfunc_t check_func;
	38	static int ncmdline;
	39	static char **cmdline;
	40
	41	static int
	42	compare(const void a, const void b)
	43	{
	44	return strcmp(((const cmdinfo_t *)a)->name,
	45	((const cmdinfo_t *)b)->name);
	46	}
	47
	48	void
	49	add_command(
	50	const cmdinfo_t *ci)
	51	{
	52	cmdtab = realloc((void )cmdtab, ++ncmds sizeof(*cmdtab));
	53	cmdtab[ncmds - 1] = *ci;
	54	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
	55	}
	56
	57	static int
	58	check_command(
	59	const cmdinfo_t *ci)
	60	{
	61	if (check_func)
	62	return check_func(ci);
	63	return 1;
	64	}
	65
	66	void
	67	add_check_command(
	68	checkfunc_t cf)
	69	{
	70	check_func = cf;
	71	}
	72
	73	int
	74	command_usage(
	75	const cmdinfo_t *ci)
	76	{
	77	printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
	78	return 0;
	79	}
	80
	81	int
	82	command(
	83	const cmdinfo_t *ct,
	84	int argc,
	85	char **argv)
	86	{
	87	char *cmd = argv[0];
	88
	89	if (!check_command(ct))
	90	return 0;
	91
	92	if (argc-1 < ct->argmin \|\| (ct->argmax != -1 && argc-1 > ct->argmax)) {
	93	if (ct->argmax == -1)
	94	fprintf(stderr,
95	_("bad argument count %d to %s, expected at least %d arguments\n"),
96	argc-1, cmd, ct->argmin);
97	else if (ct->argmin == ct->argmax)
98	fprintf(stderr,
99	_("bad argument count %d to %s, expected %d arguments\n"),
100	argc-1, cmd, ct->argmin);
101	else
102	fprintf(stderr,
103	_("bad argument count %d to %s, expected between %d and %d arguments\n"),
104	argc-1, cmd, ct->argmin, ct->argmax);
105	return 0;
106	}
107	optind = 0;
108	return ct->cfunc(argc, argv);
109	}
110
111	const cmdinfo_t *
112	find_command(
113	const char *cmd)
114	{
115	cmdinfo_t *ct;
116
117	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
118	if (strcmp(ct->name, cmd) == 0 \|\|
119	(ct->altname && strcmp(ct->altname, cmd) == 0))
120	return (const cmdinfo_t *)ct;
121	}
122	return NULL;
123	}
124
125	void
126	add_user_command(char *optarg)
127	{
128	ncmdline++;
129	cmdline = realloc(cmdline, sizeof(char) (ncmdline));
130	if (!cmdline) {
131	perror("realloc");
132	exit(1);
133	}
134	cmdline[ncmdline-1] = optarg;
135	}
136
137	static int
138	args_command(
139	int index)
140	{
141	if (args_func)
142	return args_func(index);
143	return 0;
144	}
145
146	void
147	add_args_command(
148	argsfunc_t af)
149	{
150	args_func = af;
151	}
152
7d7d975c MK	153	static void prep_fetchline(void *opaque)
	154	{
	155	int *fetchable = opaque;
	156
	157	qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
	158	*fetchable= 1;
	159	}
	160
	161	static char *get_prompt(void);
	162
e3aff4f6 AL	163	void
	164	command_loop(void)
	165	{
7d7d975c	166	int c, i, j = 0, done = 0, fetchable = 0, prompted = 0;
e3aff4f6 AL	167	char *input;
	168	char **v;
	169	const cmdinfo_t *ct;
	170
	171	for (i = 0; !done && i < ncmdline; i++) {
	172	input = strdup(cmdline[i]);
	173	if (!input) {
	174	fprintf(stderr,
	175	_("cannot strdup command '%s': %s\n"),
	176	cmdline[i], strerror(errno));
	177	exit(1);
	178	}
	179	v = breakline(input, &c);
	180	if (c) {
	181	ct = find_command(v[0]);
	182	if (ct) {
	183	if (ct->flags & CMD_FLAG_GLOBAL)
	184	done = command(ct, c, v);
	185	else {
	186	j = 0;
	187	while (!done && (j = args_command(j)))
	188	done = command(ct, c, v);
	189	}
	190	} else
	191	fprintf(stderr, _("command \"%s\" not found\n"),
	192	v[0]);
	193	}
	194	doneline(input, v);
	195	}
	196	if (cmdline) {
	197	free(cmdline);
	198	return;
	199	}
7d7d975c	200
e3aff4f6	201	while (!done) {
7d7d975c MK	202	if (!prompted) {
	203	printf("%s", get_prompt());
	204	fflush(stdout);
	205	qemu_aio_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, NULL,
	206	NULL, &fetchable);
	207	prompted = 1;
	208	}
	209
	210	qemu_aio_wait();
	211
	212	if (!fetchable) {
	213	continue;
	214	}
e3aff4f6 AL	215	if ((input = fetchline()) == NULL)
	216	break;
	217	v = breakline(input, &c);
	218	if (c) {
	219	ct = find_command(v[0]);
	220	if (ct)
	221	done = command(ct, c, v);
	222	else
	223	fprintf(stderr, _("command \"%s\" not found\n"),
	224	v[0]);
	225	}
	226	doneline(input, v);
7d7d975c MK	227
	228	prompted = 0;
	229	fetchable = 0;
e3aff4f6	230	}
7d7d975c	231	qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
e3aff4f6 AL	232	}
	233
	234	/* from libxcmd/input.c */
	235
	236	#if defined(ENABLE_READLINE)
	237	# include <readline/history.h>
	238	# include <readline/readline.h>
	239	#elif defined(ENABLE_EDITLINE)
	240	# include <histedit.h>
	241	#endif
	242
e3aff4f6 AL	243	static char *
	244	get_prompt(void)
	245	{
	246	static char prompt[FILENAME_MAX + 2 /"> "/ + 1 /"\0"/ ];
	247
	248	if (!prompt[0])
	249	snprintf(prompt, sizeof(prompt), "%s> ", progname);
	250	return prompt;
	251	}
	252
	253	#if defined(ENABLE_READLINE)
	254	char *
	255	fetchline(void)
	256	{
	257	char *line;
	258
	259	line = readline(get_prompt());
	260	if (line && *line)
	261	add_history(line);
	262	return line;
	263	}
	264	#elif defined(ENABLE_EDITLINE)
	265	static char el_get_prompt(EditLine e) { return get_prompt(); }
	266	char *
	267	fetchline(void)
	268	{
	269	static EditLine *el;
	270	static History *hist;
	271	HistEvent hevent;
	272	char *line;
	273	int count;
	274
	275	if (!el) {
	276	hist = history_init();
	277	history(hist, &hevent, H_SETSIZE, 100);
	278	el = el_init(progname, stdin, stdout, stderr);
	279	el_source(el, NULL);
	280	el_set(el, EL_SIGNAL, 1);
	281	el_set(el, EL_PROMPT, el_get_prompt);
	282	el_set(el, EL_HIST, history, (const char *)hist);
	283	}
	284	line = strdup(el_gets(el, &count));
	285	if (line) {
	286	if (count > 0)
	287	line[count-1] = '\0';
	288	if (*line)
	289	history(hist, &hevent, H_ENTER, line);
	290	}
	291	return line;
	292	}
	293	#else
	294	# define MAXREADLINESZ 1024
	295	char *
	296	fetchline(void)
	297	{
	298	char p, line = malloc(MAXREADLINESZ);
	299
	300	if (!line)
	301	return NULL;
e3aff4f6 AL	302	if (!fgets(line, MAXREADLINESZ, stdin)) {
	303	free(line);
	304	return NULL;
	305	}
	306	p = line + strlen(line);
	307	if (p != line && p[-1] == '\n')
	308	p[-1] = '\0';
	309	return line;
	310	}
	311	#endif
	312
c32d766a SW	313	static char qemu_strsep(char input, const char delim)
	314	{
	315	char result = input;
	316	if (result != NULL) {
88bf7950 BS	317	char *p;
88bf7950 BS	318
50da01ed SW	319	for (p = result; *p != '\0'; p++) {
50da01ed SW	320	if (strchr(delim, *p)) {
c32d766a SW	321	break;
	322	}
	323	}
	324	if (*p == '\0') {
	325	*input = NULL;
	326	} else {
	327	*p = '\0';
	328	*input = p + 1;
	329	}
	330	}
	331	return result;
	332	}
	333
e3aff4f6 AL	334	char **
	335	breakline(
	336	char *input,
	337	int *count)
	338	{
	339	int c = 0;
	340	char *p;
	341	char *rval = calloc(sizeof(char ), 1);
	342
c32d766a	343	while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
e3aff4f6 AL	344	if (!*p)
	345	continue;
	346	c++;
	347	rval = realloc(rval, sizeof(rval) (c + 1));
	348	if (!rval) {
	349	c = 0;
	350	break;
	351	}
	352	rval[c - 1] = p;
	353	rval[c] = NULL;
	354	}
	355	*count = c;
	356	return rval;
	357	}
	358
	359	void
	360	doneline(
	361	char *input,
	362	char **vec)
	363	{
	364	free(input);
	365	free(vec);
	366	}
	367
	368	#define EXABYTES(x) ((long long)(x) << 60)
	369	#define PETABYTES(x) ((long long)(x) << 50)
	370	#define TERABYTES(x) ((long long)(x) << 40)
	371	#define GIGABYTES(x) ((long long)(x) << 30)
	372	#define MEGABYTES(x) ((long long)(x) << 20)
	373	#define KILOBYTES(x) ((long long)(x) << 10)
	374
	375	long long
	376	cvtnum(
	377	char *s)
	378	{
	379	long long i;
	380	char *sp;
	381	int c;
	382
	383	i = strtoll(s, &sp, 0);
	384	if (i == 0 && sp == s)
	385	return -1LL;
	386	if (*sp == '\0')
	387	return i;
	388
	389	if (sp[1] != '\0')
	390	return -1LL;
	391
	392	c = tolower(*sp);
	393	switch (c) {
	394	default:
	395	return i;
	396	case 'k':
	397	return KILOBYTES(i);
	398	case 'm':
	399	return MEGABYTES(i);
	400	case 'g':
	401	return GIGABYTES(i);
	402	case 't':
	403	return TERABYTES(i);
	404	case 'p':
	405	return PETABYTES(i);
	406	case 'e':
	407	return EXABYTES(i);
408	}
409	return -1LL;
410	}
411
412	#define TO_EXABYTES(x) ((x) / EXABYTES(1))
413	#define TO_PETABYTES(x) ((x) / PETABYTES(1))
414	#define TO_TERABYTES(x) ((x) / TERABYTES(1))
415	#define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
416	#define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
417	#define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
418
419	void
420	cvtstr(
421	double value,
422	char *str,
423	size_t size)
424	{
425	const char *fmt;
426	int precise;
427
428	precise = ((double)value * 1000 == (double)(int)value * 1000);
429
430	if (value >= EXABYTES(1)) {
431	fmt = precise ? "%.f EiB" : "%.3f EiB";
432	snprintf(str, size, fmt, TO_EXABYTES(value));
433	} else if (value >= PETABYTES(1)) {
434	fmt = precise ? "%.f PiB" : "%.3f PiB";
435	snprintf(str, size, fmt, TO_PETABYTES(value));
436	} else if (value >= TERABYTES(1)) {
437	fmt = precise ? "%.f TiB" : "%.3f TiB";
438	snprintf(str, size, fmt, TO_TERABYTES(value));
439	} else if (value >= GIGABYTES(1)) {
440	fmt = precise ? "%.f GiB" : "%.3f GiB";
441	snprintf(str, size, fmt, TO_GIGABYTES(value));
442	} else if (value >= MEGABYTES(1)) {
443	fmt = precise ? "%.f MiB" : "%.3f MiB";
444	snprintf(str, size, fmt, TO_MEGABYTES(value));
445	} else if (value >= KILOBYTES(1)) {
446	fmt = precise ? "%.f KiB" : "%.3f KiB";
447	snprintf(str, size, fmt, TO_KILOBYTES(value));
448	} else {
449	snprintf(str, size, "%f bytes", value);
450	}
451	}
452
453	struct timeval
454	tsub(struct timeval t1, struct timeval t2)
455	{
456	t1.tv_usec -= t2.tv_usec;
457	if (t1.tv_usec < 0) {
458	t1.tv_usec += 1000000;
459	t1.tv_sec--;
460	}
461	t1.tv_sec -= t2.tv_sec;
462	return t1;
463	}
464
465	double
466	tdiv(double value, struct timeval tv)
467	{
468	return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
469	}
470
471	#define HOURS(sec) ((sec) / (60 * 60))
472	#define MINUTES(sec) (((sec) % (60 * 60)) / 60)
473	#define SECONDS(sec) ((sec) % 60)
474
475	void
476	timestr(
477	struct timeval *tv,
478	char *ts,
479	size_t size,
480	int format)
481	{
482	double usec = (double)tv->tv_usec / 1000000.0;
483
484	if (format & TERSE_FIXED_TIME) {
485	if (!HOURS(tv->tv_sec)) {
486	snprintf(ts, size, "%u:%02u.%02u",
487	(unsigned int) MINUTES(tv->tv_sec),
488	(unsigned int) SECONDS(tv->tv_sec),
bcd2491a	489	(unsigned int) (usec * 100));
e3aff4f6 AL	490	return;
	491	}
	492	format \|= VERBOSE_FIXED_TIME; /* fallback if hours needed */
	493	}
	494
	495	if ((format & VERBOSE_FIXED_TIME) \|\| tv->tv_sec) {
	496	snprintf(ts, size, "%u:%02u:%02u.%02u",
	497	(unsigned int) HOURS(tv->tv_sec),
	498	(unsigned int) MINUTES(tv->tv_sec),
	499	(unsigned int) SECONDS(tv->tv_sec),
bcd2491a	500	(unsigned int) (usec * 100));
e3aff4f6	501	} else {
bcd2491a	502	snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
e3aff4f6 AL	503	}
	504	}
	505
	506
	507	/* from libxcmd/quit.c */
	508
	509	static cmdinfo_t quit_cmd;
	510
	511	/* ARGSUSED */
	512	static int
	513	quit_f(
	514	int argc,
	515	char **argv)
	516	{
	517	return 1;
	518	}
	519
	520	void
	521	quit_init(void)
	522	{
	523	quit_cmd.name = _("quit");
	524	quit_cmd.altname = _("q");
	525	quit_cmd.cfunc = quit_f;
	526	quit_cmd.argmin = -1;
	527	quit_cmd.argmax = -1;
	528	quit_cmd.flags = CMD_FLAG_GLOBAL;
	529	quit_cmd.oneline = _("exit the program");
	530
	531	add_command(&quit_cmd);
	532	}
	533
	534	/* from libxcmd/help.c */
	535
	536	static cmdinfo_t help_cmd;
	537	static void help_onecmd(const char cmd, const cmdinfo_t ct);
	538	static void help_oneline(const char cmd, const cmdinfo_t ct);
	539
	540	static void
	541	help_all(void)
	542	{
	543	const cmdinfo_t *ct;
	544
	545	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++)
	546	help_oneline(ct->name, ct);
	547	printf(_("\nUse 'help commandname' for extended help.\n"));
	548	}
	549
	550	static int
	551	help_f(
	552	int argc,
	553	char **argv)
	554	{
	555	const cmdinfo_t *ct;
	556
	557	if (argc == 1) {
	558	help_all();
	559	return 0;
	560	}
	561	ct = find_command(argv[1]);
	562	if (ct == NULL) {
	563	printf(_("command %s not found\n"), argv[1]);
	564	return 0;
	565	}
	566	help_onecmd(argv[1], ct);
567	return 0;
568	}
569
570	static void
571	help_onecmd(
572	const char *cmd,
573	const cmdinfo_t *ct)
574	{
575	help_oneline(cmd, ct);
576	if (ct->help)
577	ct->help();
578	}
579
580	static void
581	help_oneline(
582	const char *cmd,
583	const cmdinfo_t *ct)
584	{
585	if (cmd)
586	printf("%s ", cmd);
587	else {
588	printf("%s ", ct->name);
589	if (ct->altname)
590	printf("(or %s) ", ct->altname);
591	}
592	if (ct->args)
593	printf("%s ", ct->args);
594	printf("-- %s\n", ct->oneline);
595	}
596
597	void
598	help_init(void)
599	{
600	help_cmd.name = _("help");
601	help_cmd.altname = _("?");
602	help_cmd.cfunc = help_f;
603	help_cmd.argmin = 0;
604	help_cmd.argmax = 1;
605	help_cmd.flags = CMD_FLAG_GLOBAL;
606	help_cmd.args = _("[command]");
607	help_cmd.oneline = _("help for one or all commands");
608
609	add_command(&help_cmd);
610	}