root / cmd.c @ 371c6489
History | View | Annotate | Download (12.2 kB)
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
|
15 |
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
16 |
*/
|
17 |
|
18 |
#include <stdio.h> |
19 |
#include <stdlib.h> |
20 |
#include <string.h> |
21 |
#include <ctype.h> |
22 |
#include <errno.h> |
23 |
#include <sys/time.h> |
24 |
#include <getopt.h> |
25 |
|
26 |
#include "cmd.h" |
27 |
#include "qemu-aio.h" |
28 |
|
29 |
#define _(x) x /* not gettext support yet */ |
30 |
|
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 add_command(const cmdinfo_t *ci) |
49 |
{ |
50 |
cmdtab = g_realloc((void *)cmdtab, ++ncmds * sizeof(*cmdtab)); |
51 |
cmdtab[ncmds - 1] = *ci;
|
52 |
qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
|
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 |
|
123 |
void add_user_command(char *optarg) |
124 |
{ |
125 |
cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *)); |
126 |
cmdline[ncmdline-1] = optarg;
|
127 |
} |
128 |
|
129 |
static int |
130 |
args_command( |
131 |
int index)
|
132 |
{ |
133 |
if (args_func)
|
134 |
return args_func(index);
|
135 |
return 0; |
136 |
} |
137 |
|
138 |
void
|
139 |
add_args_command( |
140 |
argsfunc_t af) |
141 |
{ |
142 |
args_func = af; |
143 |
} |
144 |
|
145 |
static void prep_fetchline(void *opaque) |
146 |
{ |
147 |
int *fetchable = opaque;
|
148 |
|
149 |
qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL); |
150 |
*fetchable= 1;
|
151 |
} |
152 |
|
153 |
static char *get_prompt(void); |
154 |
|
155 |
void command_loop(void) |
156 |
{ |
157 |
int c, i, j = 0, done = 0, fetchable = 0, prompted = 0; |
158 |
char *input;
|
159 |
char **v;
|
160 |
const cmdinfo_t *ct;
|
161 |
|
162 |
for (i = 0; !done && i < ncmdline; i++) { |
163 |
input = strdup(cmdline[i]); |
164 |
if (!input) {
|
165 |
fprintf(stderr, _("cannot strdup command '%s': %s\n"),
|
166 |
cmdline[i], strerror(errno)); |
167 |
exit(1);
|
168 |
} |
169 |
v = breakline(input, &c); |
170 |
if (c) {
|
171 |
ct = find_command(v[0]);
|
172 |
if (ct) {
|
173 |
if (ct->flags & CMD_FLAG_GLOBAL) {
|
174 |
done = command(ct, c, v); |
175 |
} else {
|
176 |
j = 0;
|
177 |
while (!done && (j = args_command(j))) {
|
178 |
done = command(ct, c, v); |
179 |
} |
180 |
} |
181 |
} else {
|
182 |
fprintf(stderr, _("command \"%s\" not found\n"), v[0]); |
183 |
} |
184 |
} |
185 |
doneline(input, v); |
186 |
} |
187 |
if (cmdline) {
|
188 |
g_free(cmdline); |
189 |
return;
|
190 |
} |
191 |
|
192 |
while (!done) {
|
193 |
if (!prompted) {
|
194 |
printf("%s", get_prompt());
|
195 |
fflush(stdout); |
196 |
qemu_aio_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, NULL, |
197 |
NULL, &fetchable);
|
198 |
prompted = 1;
|
199 |
} |
200 |
|
201 |
qemu_aio_wait(); |
202 |
|
203 |
if (!fetchable) {
|
204 |
continue;
|
205 |
} |
206 |
input = fetchline(); |
207 |
if (input == NULL) { |
208 |
break;
|
209 |
} |
210 |
v = breakline(input, &c); |
211 |
if (c) {
|
212 |
ct = find_command(v[0]);
|
213 |
if (ct) {
|
214 |
done = command(ct, c, v); |
215 |
} else {
|
216 |
fprintf(stderr, _("command \"%s\" not found\n"), v[0]); |
217 |
} |
218 |
} |
219 |
doneline(input, v); |
220 |
|
221 |
prompted = 0;
|
222 |
fetchable = 0;
|
223 |
} |
224 |
qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL); |
225 |
} |
226 |
|
227 |
/* from libxcmd/input.c */
|
228 |
|
229 |
#if defined(ENABLE_READLINE)
|
230 |
# include <readline/history.h> |
231 |
# include <readline/readline.h> |
232 |
#elif defined(ENABLE_EDITLINE)
|
233 |
# include <histedit.h> |
234 |
#endif
|
235 |
|
236 |
static char * |
237 |
get_prompt(void)
|
238 |
{ |
239 |
static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ]; |
240 |
|
241 |
if (!prompt[0]) |
242 |
snprintf(prompt, sizeof(prompt), "%s> ", progname); |
243 |
return prompt;
|
244 |
} |
245 |
|
246 |
#if defined(ENABLE_READLINE)
|
247 |
char *
|
248 |
fetchline(void)
|
249 |
{ |
250 |
char *line;
|
251 |
|
252 |
line = readline(get_prompt()); |
253 |
if (line && *line)
|
254 |
add_history(line); |
255 |
return line;
|
256 |
} |
257 |
#elif defined(ENABLE_EDITLINE)
|
258 |
static char *el_get_prompt(EditLine *e) { return get_prompt(); } |
259 |
char *
|
260 |
fetchline(void)
|
261 |
{ |
262 |
static EditLine *el;
|
263 |
static History *hist;
|
264 |
HistEvent hevent; |
265 |
char *line;
|
266 |
int count;
|
267 |
|
268 |
if (!el) {
|
269 |
hist = history_init(); |
270 |
history(hist, &hevent, H_SETSIZE, 100);
|
271 |
el = el_init(progname, stdin, stdout, stderr); |
272 |
el_source(el, NULL);
|
273 |
el_set(el, EL_SIGNAL, 1);
|
274 |
el_set(el, EL_PROMPT, el_get_prompt); |
275 |
el_set(el, EL_HIST, history, (const char *)hist); |
276 |
} |
277 |
line = strdup(el_gets(el, &count)); |
278 |
if (line) {
|
279 |
if (count > 0) |
280 |
line[count-1] = '\0'; |
281 |
if (*line)
|
282 |
history(hist, &hevent, H_ENTER, line); |
283 |
} |
284 |
return line;
|
285 |
} |
286 |
#else
|
287 |
# define MAXREADLINESZ 1024 |
288 |
char *
|
289 |
fetchline(void)
|
290 |
{ |
291 |
char *p, *line = malloc(MAXREADLINESZ);
|
292 |
|
293 |
if (!line)
|
294 |
return NULL; |
295 |
if (!fgets(line, MAXREADLINESZ, stdin)) {
|
296 |
free(line); |
297 |
return NULL; |
298 |
} |
299 |
p = line + strlen(line); |
300 |
if (p != line && p[-1] == '\n') |
301 |
p[-1] = '\0'; |
302 |
return line;
|
303 |
} |
304 |
#endif
|
305 |
|
306 |
static char *qemu_strsep(char **input, const char *delim) |
307 |
{ |
308 |
char *result = *input;
|
309 |
if (result != NULL) { |
310 |
char *p;
|
311 |
|
312 |
for (p = result; *p != '\0'; p++) { |
313 |
if (strchr(delim, *p)) {
|
314 |
break;
|
315 |
} |
316 |
} |
317 |
if (*p == '\0') { |
318 |
*input = NULL;
|
319 |
} else {
|
320 |
*p = '\0';
|
321 |
*input = p + 1;
|
322 |
} |
323 |
} |
324 |
return result;
|
325 |
} |
326 |
|
327 |
char **breakline(char *input, int *count) |
328 |
{ |
329 |
int c = 0; |
330 |
char *p;
|
331 |
char **rval = calloc(sizeof(char *), 1); |
332 |
char **tmp;
|
333 |
|
334 |
while (rval && (p = qemu_strsep(&input, " ")) != NULL) { |
335 |
if (!*p) {
|
336 |
continue;
|
337 |
} |
338 |
c++; |
339 |
tmp = realloc(rval, sizeof(*rval) * (c + 1)); |
340 |
if (!tmp) {
|
341 |
free(rval); |
342 |
rval = NULL;
|
343 |
c = 0;
|
344 |
break;
|
345 |
} else {
|
346 |
rval = tmp; |
347 |
} |
348 |
rval[c - 1] = p;
|
349 |
rval[c] = NULL;
|
350 |
} |
351 |
*count = c; |
352 |
return rval;
|
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 |
|
388 |
c = qemu_tolower(*sp); |
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), |
485 |
(unsigned int) (usec * 100)); |
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), |
496 |
(unsigned int) (usec * 100)); |
497 |
} else {
|
498 |
snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000)); |
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 |
} |