root / cmd.c @ 9c9e7d51
History | View | Annotate | Download (11.6 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
|
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 |
|
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 |
|
163 |
void
|
164 |
command_loop(void)
|
165 |
{ |
166 |
int c, i, j = 0, done = 0, fetchable = 0, prompted = 0; |
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 |
} |
200 |
|
201 |
while (!done) {
|
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 |
} |
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); |
227 |
|
228 |
prompted = 0;
|
229 |
fetchable = 0;
|
230 |
} |
231 |
qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL); |
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 |
|
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; |
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 |
|
313 |
static char *qemu_strsep(char **input, const char *delim) |
314 |
{ |
315 |
char *result = *input;
|
316 |
if (result != NULL) { |
317 |
char *p;
|
318 |
|
319 |
for (p = result; *p != '\0'; p++) { |
320 |
if (strchr(delim, *p)) {
|
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 |
|
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 |
|
343 |
while (rval && (p = qemu_strsep(&input, " ")) != NULL) { |
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), |
489 |
(unsigned int) usec * 100); |
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), |
500 |
(unsigned int) usec * 100); |
501 |
} else {
|
502 |
snprintf(ts, size, "0.%04u sec", (unsigned int) usec * 10000); |
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 |
} |