[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, ncmdline * sizeof(char *));
    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;
        }
        input = fetchline();
        if (input == 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 = qemu_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
81beeec4	48	void add_command(const cmdinfo_t *ci)
e3aff4f6	49	{
81beeec4 PB	50	cmdtab = realloc((void )cmdtab, ++ncmds sizeof(*cmdtab));
	51	cmdtab[ncmds - 1] = *ci;
	52	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
e3aff4f6 AL	53	}
	54
	55	static int
	56	check_command(
	57	const cmdinfo_t *ci)
	58	{
	59	if (check_func)
	60	return check_func(ci);
	61	return 1;
	62	}
	63
	64	void
	65	add_check_command(
	66	checkfunc_t cf)
	67	{
	68	check_func = cf;
	69	}
	70
	71	int
	72	command_usage(
	73	const cmdinfo_t *ci)
	74	{
	75	printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
	76	return 0;
	77	}
	78
	79	int
	80	command(
	81	const cmdinfo_t *ct,
	82	int argc,
	83	char **argv)
	84	{
	85	char *cmd = argv[0];
	86
	87	if (!check_command(ct))
	88	return 0;
	89
	90	if (argc-1 < ct->argmin \|\| (ct->argmax != -1 && argc-1 > ct->argmax)) {
	91	if (ct->argmax == -1)
	92	fprintf(stderr,
	93	_("bad argument count %d to %s, expected at least %d arguments\n"),
	94	argc-1, cmd, ct->argmin);
	95	else if (ct->argmin == ct->argmax)
	96	fprintf(stderr,
	97	_("bad argument count %d to %s, expected %d arguments\n"),
	98	argc-1, cmd, ct->argmin);
	99	else
	100	fprintf(stderr,
	101	_("bad argument count %d to %s, expected between %d and %d arguments\n"),
	102	argc-1, cmd, ct->argmin, ct->argmax);
	103	return 0;
	104	}
	105	optind = 0;
	106	return ct->cfunc(argc, argv);
	107	}
	108
	109	const cmdinfo_t *
	110	find_command(
	111	const char *cmd)
	112	{
	113	cmdinfo_t *ct;
	114
	115	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
	116	if (strcmp(ct->name, cmd) == 0 \|\|
117	(ct->altname && strcmp(ct->altname, cmd) == 0))
118	return (const cmdinfo_t *)ct;
119	}
120	return NULL;
121	}
122
81beeec4	123	void add_user_command(char *optarg)
e3aff4f6	124	{
81beeec4 PB	125	ncmdline++;
	126	cmdline = realloc(cmdline, ncmdline * sizeof(char *));
	127	if (!cmdline) {
	128	perror("realloc");
	129	exit(1);
	130	}
	131	cmdline[ncmdline-1] = optarg;
e3aff4f6 AL	132	}
	133
	134	static int
	135	args_command(
	136	int index)
	137	{
	138	if (args_func)
	139	return args_func(index);
	140	return 0;
	141	}
	142
	143	void
	144	add_args_command(
	145	argsfunc_t af)
	146	{
	147	args_func = af;
	148	}
	149
7d7d975c MK	150	static void prep_fetchline(void *opaque)
	151	{
	152	int *fetchable = opaque;
	153
	154	qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
	155	*fetchable= 1;
	156	}
	157
	158	static char *get_prompt(void);
	159
81beeec4	160	void command_loop(void)
e3aff4f6	161	{
81beeec4 PB	162	int c, i, j = 0, done = 0, fetchable = 0, prompted = 0;
	163	char *input;
	164	char **v;
	165	const cmdinfo_t *ct;
	166
	167	for (i = 0; !done && i < ncmdline; i++) {
	168	input = strdup(cmdline[i]);
	169	if (!input) {
	170	fprintf(stderr, _("cannot strdup command '%s': %s\n"),
	171	cmdline[i], strerror(errno));
	172	exit(1);
	173	}
	174	v = breakline(input, &c);
	175	if (c) {
	176	ct = find_command(v[0]);
	177	if (ct) {
	178	if (ct->flags & CMD_FLAG_GLOBAL) {
	179	done = command(ct, c, v);
	180	} else {
	181	j = 0;
	182	while (!done && (j = args_command(j))) {
	183	done = command(ct, c, v);
	184	}
	185	}
	186	} else {
	187	fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
	188	}
e3aff4f6	189	}
81beeec4 PB	190	doneline(input, v);
	191	}
	192	if (cmdline) {
	193	free(cmdline);
	194	return;
	195	}
7d7d975c	196
81beeec4	197	while (!done) {
7d7d975c MK	198	if (!prompted) {
	199	printf("%s", get_prompt());
	200	fflush(stdout);
	201	qemu_aio_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, NULL,
	202	NULL, &fetchable);
	203	prompted = 1;
	204	}
	205
	206	qemu_aio_wait();
	207
	208	if (!fetchable) {
	209	continue;
	210	}
81beeec4 PB	211	input = fetchline();
	212	if (input == NULL) {
	213	break;
	214	}
	215	v = breakline(input, &c);
	216	if (c) {
	217	ct = find_command(v[0]);
	218	if (ct) {
	219	done = command(ct, c, v);
	220	} else {
	221	fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
	222	}
	223	}
	224	doneline(input, v);
7d7d975c MK	225
	226	prompted = 0;
	227	fetchable = 0;
81beeec4	228	}
7d7d975c	229	qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
e3aff4f6 AL	230	}
	231
	232	/* from libxcmd/input.c */
	233
	234	#if defined(ENABLE_READLINE)
	235	# include <readline/history.h>
	236	# include <readline/readline.h>
	237	#elif defined(ENABLE_EDITLINE)
	238	# include <histedit.h>
	239	#endif
	240
e3aff4f6 AL	241	static char *
	242	get_prompt(void)
	243	{
	244	static char prompt[FILENAME_MAX + 2 /"> "/ + 1 /"\0"/ ];
	245
	246	if (!prompt[0])
	247	snprintf(prompt, sizeof(prompt), "%s> ", progname);
	248	return prompt;
	249	}
	250
	251	#if defined(ENABLE_READLINE)
	252	char *
	253	fetchline(void)
	254	{
	255	char *line;
	256
	257	line = readline(get_prompt());
	258	if (line && *line)
	259	add_history(line);
	260	return line;
	261	}
	262	#elif defined(ENABLE_EDITLINE)
	263	static char el_get_prompt(EditLine e) { return get_prompt(); }
	264	char *
	265	fetchline(void)
	266	{
	267	static EditLine *el;
	268	static History *hist;
	269	HistEvent hevent;
	270	char *line;
	271	int count;
	272
	273	if (!el) {
	274	hist = history_init();
	275	history(hist, &hevent, H_SETSIZE, 100);
	276	el = el_init(progname, stdin, stdout, stderr);
	277	el_source(el, NULL);
	278	el_set(el, EL_SIGNAL, 1);
	279	el_set(el, EL_PROMPT, el_get_prompt);
	280	el_set(el, EL_HIST, history, (const char *)hist);
	281	}
	282	line = strdup(el_gets(el, &count));
	283	if (line) {
	284	if (count > 0)
	285	line[count-1] = '\0';
	286	if (*line)
	287	history(hist, &hevent, H_ENTER, line);
	288	}
	289	return line;
	290	}
	291	#else
	292	# define MAXREADLINESZ 1024
	293	char *
	294	fetchline(void)
	295	{
	296	char p, line = malloc(MAXREADLINESZ);
	297
	298	if (!line)
	299	return NULL;
e3aff4f6 AL	300	if (!fgets(line, MAXREADLINESZ, stdin)) {
	301	free(line);
	302	return NULL;
	303	}
	304	p = line + strlen(line);
	305	if (p != line && p[-1] == '\n')
	306	p[-1] = '\0';
	307	return line;
	308	}
	309	#endif
	310
c32d766a SW	311	static char qemu_strsep(char input, const char delim)
	312	{
	313	char result = input;
	314	if (result != NULL) {
88bf7950 BS	315	char *p;
88bf7950 BS	316
50da01ed SW	317	for (p = result; *p != '\0'; p++) {
50da01ed SW	318	if (strchr(delim, *p)) {
c32d766a SW	319	break;
	320	}
	321	}
	322	if (*p == '\0') {
	323	*input = NULL;
	324	} else {
	325	*p = '\0';
	326	*input = p + 1;
	327	}
	328	}
	329	return result;
	330	}
	331
81beeec4	332	char *breakline(char input, int *count)
e3aff4f6	333	{
81beeec4 PB	334	int c = 0;
	335	char *p;
	336	char *rval = calloc(sizeof(char ), 1);
	337
	338	while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
	339	if (!*p) {
	340	continue;
	341	}
	342	c++;
	343	rval = realloc(rval, sizeof(rval) (c + 1));
	344	if (!rval) {
	345	c = 0;
	346	break;
	347	}
	348	rval[c - 1] = p;
	349	rval[c] = NULL;
	350	}
	351	*count = c;
	352	return rval;
e3aff4f6 AL	353	}
	354
	355	void
	356	doneline(
	357	char *input,
	358	char **vec)
	359	{
	360	free(input);
	361	free(vec);
	362	}
	363
	364	#define EXABYTES(x) ((long long)(x) << 60)
	365	#define PETABYTES(x) ((long long)(x) << 50)
	366	#define TERABYTES(x) ((long long)(x) << 40)
	367	#define GIGABYTES(x) ((long long)(x) << 30)
	368	#define MEGABYTES(x) ((long long)(x) << 20)
	369	#define KILOBYTES(x) ((long long)(x) << 10)
	370
	371	long long
	372	cvtnum(
	373	char *s)
	374	{
	375	long long i;
	376	char *sp;
	377	int c;
	378
	379	i = strtoll(s, &sp, 0);
	380	if (i == 0 && sp == s)
	381	return -1LL;
	382	if (*sp == '\0')
	383	return i;
	384
	385	if (sp[1] != '\0')
	386	return -1LL;
	387
7b0a03a1	388	c = qemu_tolower(*sp);
e3aff4f6 AL	389	switch (c) {
	390	default:
	391	return i;
	392	case 'k':
	393	return KILOBYTES(i);
	394	case 'm':
	395	return MEGABYTES(i);
	396	case 'g':
	397	return GIGABYTES(i);
	398	case 't':
	399	return TERABYTES(i);
	400	case 'p':
	401	return PETABYTES(i);
	402	case 'e':
	403	return EXABYTES(i);
	404	}
	405	return -1LL;
	406	}
	407
	408	#define TO_EXABYTES(x) ((x) / EXABYTES(1))
	409	#define TO_PETABYTES(x) ((x) / PETABYTES(1))
	410	#define TO_TERABYTES(x) ((x) / TERABYTES(1))
	411	#define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
	412	#define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
	413	#define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
	414
	415	void
	416	cvtstr(
	417	double value,
	418	char *str,
	419	size_t size)
	420	{
	421	const char *fmt;
	422	int precise;
	423
	424	precise = ((double)value * 1000 == (double)(int)value * 1000);
	425
	426	if (value >= EXABYTES(1)) {
	427	fmt = precise ? "%.f EiB" : "%.3f EiB";
	428	snprintf(str, size, fmt, TO_EXABYTES(value));
	429	} else if (value >= PETABYTES(1)) {
	430	fmt = precise ? "%.f PiB" : "%.3f PiB";
	431	snprintf(str, size, fmt, TO_PETABYTES(value));
	432	} else if (value >= TERABYTES(1)) {
	433	fmt = precise ? "%.f TiB" : "%.3f TiB";
	434	snprintf(str, size, fmt, TO_TERABYTES(value));
	435	} else if (value >= GIGABYTES(1)) {
	436	fmt = precise ? "%.f GiB" : "%.3f GiB";
	437	snprintf(str, size, fmt, TO_GIGABYTES(value));
	438	} else if (value >= MEGABYTES(1)) {
	439	fmt = precise ? "%.f MiB" : "%.3f MiB";
	440	snprintf(str, size, fmt, TO_MEGABYTES(value));
	441	} else if (value >= KILOBYTES(1)) {
	442	fmt = precise ? "%.f KiB" : "%.3f KiB";
	443	snprintf(str, size, fmt, TO_KILOBYTES(value));
	444	} else {
	445	snprintf(str, size, "%f bytes", value);
	446	}
	447	}
	448
	449	struct timeval
	450	tsub(struct timeval t1, struct timeval t2)
	451	{
	452	t1.tv_usec -= t2.tv_usec;
453	if (t1.tv_usec < 0) {
454	t1.tv_usec += 1000000;
455	t1.tv_sec--;
456	}
457	t1.tv_sec -= t2.tv_sec;
458	return t1;
459	}
460
461	double
462	tdiv(double value, struct timeval tv)
463	{
464	return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
465	}
466
467	#define HOURS(sec) ((sec) / (60 * 60))
468	#define MINUTES(sec) (((sec) % (60 * 60)) / 60)
469	#define SECONDS(sec) ((sec) % 60)
470
471	void
472	timestr(
473	struct timeval *tv,
474	char *ts,
475	size_t size,
476	int format)
477	{
478	double usec = (double)tv->tv_usec / 1000000.0;
479
480	if (format & TERSE_FIXED_TIME) {
481	if (!HOURS(tv->tv_sec)) {
482	snprintf(ts, size, "%u:%02u.%02u",
483	(unsigned int) MINUTES(tv->tv_sec),
484	(unsigned int) SECONDS(tv->tv_sec),
bcd2491a	485	(unsigned int) (usec * 100));
e3aff4f6 AL	486	return;
	487	}
	488	format \|= VERBOSE_FIXED_TIME; /* fallback if hours needed */
	489	}
	490
	491	if ((format & VERBOSE_FIXED_TIME) \|\| tv->tv_sec) {
	492	snprintf(ts, size, "%u:%02u:%02u.%02u",
	493	(unsigned int) HOURS(tv->tv_sec),
	494	(unsigned int) MINUTES(tv->tv_sec),
	495	(unsigned int) SECONDS(tv->tv_sec),
bcd2491a	496	(unsigned int) (usec * 100));
e3aff4f6	497	} else {
bcd2491a	498	snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
e3aff4f6 AL	499	}
	500	}
	501
	502
	503	/* from libxcmd/quit.c */
	504
	505	static cmdinfo_t quit_cmd;
	506
	507	/* ARGSUSED */
	508	static int
	509	quit_f(
	510	int argc,
	511	char **argv)
	512	{
	513	return 1;
	514	}
	515
	516	void
	517	quit_init(void)
	518	{
	519	quit_cmd.name = _("quit");
	520	quit_cmd.altname = _("q");
	521	quit_cmd.cfunc = quit_f;
	522	quit_cmd.argmin = -1;
	523	quit_cmd.argmax = -1;
	524	quit_cmd.flags = CMD_FLAG_GLOBAL;
	525	quit_cmd.oneline = _("exit the program");
	526
	527	add_command(&quit_cmd);
	528	}
	529
	530	/* from libxcmd/help.c */
	531
	532	static cmdinfo_t help_cmd;
	533	static void help_onecmd(const char cmd, const cmdinfo_t ct);
	534	static void help_oneline(const char cmd, const cmdinfo_t ct);
	535
	536	static void
	537	help_all(void)
	538	{
	539	const cmdinfo_t *ct;
	540
	541	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++)
	542	help_oneline(ct->name, ct);
	543	printf(_("\nUse 'help commandname' for extended help.\n"));
	544	}
	545
	546	static int
	547	help_f(
	548	int argc,
	549	char **argv)
	550	{
	551	const cmdinfo_t *ct;
	552
	553	if (argc == 1) {
	554	help_all();
	555	return 0;
	556	}
	557	ct = find_command(argv[1]);
	558	if (ct == NULL) {
	559	printf(_("command %s not found\n"), argv[1]);
	560	return 0;
	561	}
	562	help_onecmd(argv[1], ct);
563	return 0;
564	}
565
566	static void
567	help_onecmd(
568	const char *cmd,
569	const cmdinfo_t *ct)
570	{
571	help_oneline(cmd, ct);
572	if (ct->help)
573	ct->help();
574	}
575
576	static void
577	help_oneline(
578	const char *cmd,
579	const cmdinfo_t *ct)
580	{
581	if (cmd)
582	printf("%s ", cmd);
583	else {
584	printf("%s ", ct->name);
585	if (ct->altname)
586	printf("(or %s) ", ct->altname);
587	}
588	if (ct->args)
589	printf("%s ", ct->args);
590	printf("-- %s\n", ct->oneline);
591	}
592
593	void
594	help_init(void)
595	{
596	help_cmd.name = _("help");
597	help_cmd.altname = _("?");
598	help_cmd.cfunc = help_f;
599	help_cmd.argmin = 0;
600	help_cmd.argmax = 1;
601	help_cmd.flags = CMD_FLAG_GLOBAL;
602	help_cmd.args = _("[command]");
603	help_cmd.oneline = _("help for one or all commands");
604
605	add_command(&help_cmd);
606	}