CommandListener.cpp revision b87937cdea689594a293979b30b13054e7455dee 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <sys/socket.h>
19#include <sys/types.h>
20#include <netinet/in.h>
21#include <arpa/inet.h>
22#include <dirent.h>
23#include <errno.h>
24#include <fcntl.h>
25#include <string.h>
26
27#define LOG_TAG "VoldCmdListener"
28#include <cutils/log.h>
29
30#include <sysutils/SocketClient.h>
31#include <private/android_filesystem_config.h>
32
33#include "CommandListener.h"
34#include "VolumeManager.h"
35#include "ResponseCode.h"
36#include "Process.h"
37#include "Xwarp.h"
38#include "Loop.h"
39#include "Devmapper.h"
40#include "cryptfs.h"
41#include "fstrim.h"
42
43#define DUMP_ARGS 0
44
45CommandListener::CommandListener() :
46                 FrameworkListener("vold", true) {
47    registerCmd(new DumpCmd());
48    registerCmd(new VolumeCmd());
49    registerCmd(new AsecCmd());
50    registerCmd(new ObbCmd());
51    registerCmd(new StorageCmd());
52    registerCmd(new XwarpCmd());
53    registerCmd(new CryptfsCmd());
54    registerCmd(new FstrimCmd());
55}
56
57void CommandListener::dumpArgs(int argc, char **argv, int argObscure) {
58#if DUMP_ARGS
59    char buffer[4096];
60    char *p = buffer;
61
62    memset(buffer, 0, sizeof(buffer));
63    int i;
64    for (i = 0; i < argc; i++) {
65        unsigned int len = strlen(argv[i]) + 1; // Account for space
66        if (i == argObscure) {
67            len += 2; // Account for {}
68        }
69        if (((p - buffer) + len) < (sizeof(buffer)-1)) {
70            if (i == argObscure) {
71                *p++ = '{';
72                *p++ = '}';
73                *p++ = ' ';
74                continue;
75            }
76            strcpy(p, argv[i]);
77            p+= strlen(argv[i]);
78            if (i != (argc -1)) {
79                *p++ = ' ';
80            }
81        }
82    }
83    SLOGD("%s", buffer);
84#endif
85}
86
87CommandListener::DumpCmd::DumpCmd() :
88                 VoldCommand("dump") {
89}
90
91int CommandListener::DumpCmd::runCommand(SocketClient *cli,
92                                         int argc, char **argv) {
93    cli->sendMsg(0, "Dumping loop status", false);
94    if (Loop::dumpState(cli)) {
95        cli->sendMsg(ResponseCode::CommandOkay, "Loop dump failed", true);
96    }
97    cli->sendMsg(0, "Dumping DM status", false);
98    if (Devmapper::dumpState(cli)) {
99        cli->sendMsg(ResponseCode::CommandOkay, "Devmapper dump failed", true);
100    }
101    cli->sendMsg(0, "Dumping mounted filesystems", false);
102    FILE *fp = fopen("/proc/mounts", "r");
103    if (fp) {
104        char line[1024];
105        while (fgets(line, sizeof(line), fp)) {
106            line[strlen(line)-1] = '\0';
107            cli->sendMsg(0, line, false);;
108        }
109        fclose(fp);
110    }
111
112    cli->sendMsg(ResponseCode::CommandOkay, "dump complete", false);
113    return 0;
114}
115
116
117CommandListener::VolumeCmd::VolumeCmd() :
118                 VoldCommand("volume") {
119}
120
121int CommandListener::VolumeCmd::runCommand(SocketClient *cli,
122                                                      int argc, char **argv) {
123    dumpArgs(argc, argv, -1);
124
125    if (argc < 2) {
126        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
127        return 0;
128    }
129
130    VolumeManager *vm = VolumeManager::Instance();
131    int rc = 0;
132
133    if (!strcmp(argv[1], "list")) {
134        return vm->listVolumes(cli);
135    } else if (!strcmp(argv[1], "debug")) {
136        if (argc != 3 || (argc == 3 && (strcmp(argv[2], "off") && strcmp(argv[2], "on")))) {
137            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume debug <off/on>", false);
138            return 0;
139        }
140        vm->setDebug(!strcmp(argv[2], "on") ? true : false);
141    } else if (!strcmp(argv[1], "mount")) {
142        if (argc != 3) {
143            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume mount <path>", false);
144            return 0;
145        }
146        rc = vm->mountVolume(argv[2]);
147    } else if (!strcmp(argv[1], "unmount")) {
148        if (argc < 3 || argc > 4 ||
149           ((argc == 4 && strcmp(argv[3], "force")) &&
150            (argc == 4 && strcmp(argv[3], "force_and_revert")))) {
151            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume unmount <path> [force|force_and_revert]", false);
152            return 0;
153        }
154
155        bool force = false;
156        bool revert = false;
157        if (argc >= 4 && !strcmp(argv[3], "force")) {
158            force = true;
159        } else if (argc >= 4 && !strcmp(argv[3], "force_and_revert")) {
160            force = true;
161            revert = true;
162        }
163        rc = vm->unmountVolume(argv[2], force, revert);
164    } else if (!strcmp(argv[1], "format")) {
165        if (argc != 3) {
166            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: volume format <path>", false);
167            return 0;
168        }
169        rc = vm->formatVolume(argv[2]);
170    } else if (!strcmp(argv[1], "share")) {
171        if (argc != 4) {
172            cli->sendMsg(ResponseCode::CommandSyntaxError,
173                    "Usage: volume share <path> <method>", false);
174            return 0;
175        }
176        rc = vm->shareVolume(argv[2], argv[3]);
177    } else if (!strcmp(argv[1], "unshare")) {
178        if (argc != 4) {
179            cli->sendMsg(ResponseCode::CommandSyntaxError,
180                    "Usage: volume unshare <path> <method>", false);
181            return 0;
182        }
183        rc = vm->unshareVolume(argv[2], argv[3]);
184    } else if (!strcmp(argv[1], "shared")) {
185        bool enabled = false;
186        if (argc != 4) {
187            cli->sendMsg(ResponseCode::CommandSyntaxError,
188                    "Usage: volume shared <path> <method>", false);
189            return 0;
190        }
191
192        if (vm->shareEnabled(argv[2], argv[3], &enabled)) {
193            cli->sendMsg(
194                    ResponseCode::OperationFailed, "Failed to determine share enable state", true);
195        } else {
196            cli->sendMsg(ResponseCode::ShareEnabledResult,
197                    (enabled ? "Share enabled" : "Share disabled"), false);
198        }
199        return 0;
200    } else {
201        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown volume cmd", false);
202    }
203
204    if (!rc) {
205        cli->sendMsg(ResponseCode::CommandOkay, "volume operation succeeded", false);
206    } else {
207        int erno = errno;
208        rc = ResponseCode::convertFromErrno();
209        cli->sendMsg(rc, "volume operation failed", true);
210    }
211
212    return 0;
213}
214
215CommandListener::StorageCmd::StorageCmd() :
216                 VoldCommand("storage") {
217}
218
219int CommandListener::StorageCmd::runCommand(SocketClient *cli,
220                                                      int argc, char **argv) {
221    dumpArgs(argc, argv, -1);
222
223    if (argc < 2) {
224        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
225        return 0;
226    }
227
228    if (!strcmp(argv[1], "users")) {
229        DIR *dir;
230        struct dirent *de;
231
232        if (!(dir = opendir("/proc"))) {
233            cli->sendMsg(ResponseCode::OperationFailed, "Failed to open /proc", true);
234            return 0;
235        }
236
237        while ((de = readdir(dir))) {
238            int pid = Process::getPid(de->d_name);
239
240            if (pid < 0) {
241                continue;
242            }
243
244            char processName[255];
245            Process::getProcessName(pid, processName, sizeof(processName));
246
247            if (Process::checkFileDescriptorSymLinks(pid, argv[2]) ||
248                Process::checkFileMaps(pid, argv[2]) ||
249                Process::checkSymLink(pid, argv[2], "cwd") ||
250                Process::checkSymLink(pid, argv[2], "root") ||
251                Process::checkSymLink(pid, argv[2], "exe")) {
252
253                char msg[1024];
254                snprintf(msg, sizeof(msg), "%d %s", pid, processName);
255                cli->sendMsg(ResponseCode::StorageUsersListResult, msg, false);
256            }
257        }
258        closedir(dir);
259        cli->sendMsg(ResponseCode::CommandOkay, "Storage user list complete", false);
260    } else {
261        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown storage cmd", false);
262    }
263    return 0;
264}
265
266CommandListener::AsecCmd::AsecCmd() :
267                 VoldCommand("asec") {
268}
269
270void CommandListener::AsecCmd::listAsecsInDirectory(SocketClient *cli, const char *directory) {
271    DIR *d = opendir(directory);
272
273    if (!d) {
274        cli->sendMsg(ResponseCode::OperationFailed, "Failed to open asec dir", true);
275        return;
276    }
277
278    size_t dirent_len = offsetof(struct dirent, d_name) +
279            fpathconf(dirfd(d), _PC_NAME_MAX) + 1;
280
281    struct dirent *dent = (struct dirent *) malloc(dirent_len);
282    if (dent == NULL) {
283        cli->sendMsg(ResponseCode::OperationFailed, "Failed to allocate memory", true);
284        return;
285    }
286
287    struct dirent *result;
288
289    while (!readdir_r(d, dent, &result) && result != NULL) {
290        if (dent->d_name[0] == '.')
291            continue;
292        if (dent->d_type != DT_REG)
293            continue;
294        size_t name_len = strlen(dent->d_name);
295        if (name_len > 5 && name_len < 260 &&
296                !strcmp(&dent->d_name[name_len - 5], ".asec")) {
297            char id[255];
298            memset(id, 0, sizeof(id));
299            strlcpy(id, dent->d_name, name_len - 4);
300            cli->sendMsg(ResponseCode::AsecListResult, id, false);
301        }
302    }
303    closedir(d);
304
305    free(dent);
306}
307
308int CommandListener::AsecCmd::runCommand(SocketClient *cli,
309                                                      int argc, char **argv) {
310    if (argc < 2) {
311        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
312        return 0;
313    }
314
315    VolumeManager *vm = VolumeManager::Instance();
316    int rc = 0;
317
318    if (!strcmp(argv[1], "list")) {
319        dumpArgs(argc, argv, -1);
320
321        listAsecsInDirectory(cli, Volume::SEC_ASECDIR_EXT);
322        listAsecsInDirectory(cli, Volume::SEC_ASECDIR_INT);
323    } else if (!strcmp(argv[1], "create")) {
324        dumpArgs(argc, argv, 5);
325        if (argc != 8) {
326            cli->sendMsg(ResponseCode::CommandSyntaxError,
327                    "Usage: asec create <container-id> <size_mb> <fstype> <key> <ownerUid> "
328                    "<isExternal>", false);
329            return 0;
330        }
331
332        unsigned int numSectors = (atoi(argv[3]) * (1024 * 1024)) / 512;
333        const bool isExternal = (atoi(argv[7]) == 1);
334        rc = vm->createAsec(argv[2], numSectors, argv[4], argv[5], atoi(argv[6]), isExternal);
335    } else if (!strcmp(argv[1], "finalize")) {
336        dumpArgs(argc, argv, -1);
337        if (argc != 3) {
338            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec finalize <container-id>", false);
339            return 0;
340        }
341        rc = vm->finalizeAsec(argv[2]);
342    } else if (!strcmp(argv[1], "fixperms")) {
343        dumpArgs(argc, argv, -1);
344        if  (argc != 5) {
345            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fixperms <container-id> <gid> <filename>", false);
346            return 0;
347        }
348
349        char *endptr;
350        gid_t gid = (gid_t) strtoul(argv[3], &endptr, 10);
351        if (*endptr != '\0') {
352            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fixperms <container-id> <gid> <filename>", false);
353            return 0;
354        }
355
356        rc = vm->fixupAsecPermissions(argv[2], gid, argv[4]);
357    } else if (!strcmp(argv[1], "destroy")) {
358        dumpArgs(argc, argv, -1);
359        if (argc < 3) {
360            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec destroy <container-id> [force]", false);
361            return 0;
362        }
363        bool force = false;
364        if (argc > 3 && !strcmp(argv[3], "force")) {
365            force = true;
366        }
367        rc = vm->destroyAsec(argv[2], force);
368    } else if (!strcmp(argv[1], "mount")) {
369        dumpArgs(argc, argv, 3);
370        if (argc != 5) {
371            cli->sendMsg(ResponseCode::CommandSyntaxError,
372                    "Usage: asec mount <namespace-id> <key> <ownerUid>", false);
373            return 0;
374        }
375        rc = vm->mountAsec(argv[2], argv[3], atoi(argv[4]));
376    } else if (!strcmp(argv[1], "unmount")) {
377        dumpArgs(argc, argv, -1);
378        if (argc < 3) {
379            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec unmount <container-id> [force]", false);
380            return 0;
381        }
382        bool force = false;
383        if (argc > 3 && !strcmp(argv[3], "force")) {
384            force = true;
385        }
386        rc = vm->unmountAsec(argv[2], force);
387    } else if (!strcmp(argv[1], "rename")) {
388        dumpArgs(argc, argv, -1);
389        if (argc != 4) {
390            cli->sendMsg(ResponseCode::CommandSyntaxError,
391                    "Usage: asec rename <old_id> <new_id>", false);
392            return 0;
393        }
394        rc = vm->renameAsec(argv[2], argv[3]);
395    } else if (!strcmp(argv[1], "path")) {
396        dumpArgs(argc, argv, -1);
397        if (argc != 3) {
398            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec path <container-id>", false);
399            return 0;
400        }
401        char path[255];
402
403        if (!(rc = vm->getAsecMountPath(argv[2], path, sizeof(path)))) {
404            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
405            return 0;
406        }
407    } else if (!strcmp(argv[1], "fspath")) {
408        dumpArgs(argc, argv, -1);
409        if (argc != 3) {
410            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: asec fspath <container-id>", false);
411            return 0;
412        }
413        char path[255];
414
415        if (!(rc = vm->getAsecFilesystemPath(argv[2], path, sizeof(path)))) {
416            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
417            return 0;
418        }
419    } else {
420        dumpArgs(argc, argv, -1);
421        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown asec cmd", false);
422    }
423
424    if (!rc) {
425        cli->sendMsg(ResponseCode::CommandOkay, "asec operation succeeded", false);
426    } else {
427        rc = ResponseCode::convertFromErrno();
428        cli->sendMsg(rc, "asec operation failed", true);
429    }
430
431    return 0;
432}
433
434CommandListener::ObbCmd::ObbCmd() :
435                 VoldCommand("obb") {
436}
437
438int CommandListener::ObbCmd::runCommand(SocketClient *cli,
439                                                      int argc, char **argv) {
440    if (argc < 2) {
441        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
442        return 0;
443    }
444
445    VolumeManager *vm = VolumeManager::Instance();
446    int rc = 0;
447
448    if (!strcmp(argv[1], "list")) {
449        dumpArgs(argc, argv, -1);
450
451        rc = vm->listMountedObbs(cli);
452    } else if (!strcmp(argv[1], "mount")) {
453            dumpArgs(argc, argv, 3);
454            if (argc != 5) {
455                cli->sendMsg(ResponseCode::CommandSyntaxError,
456                        "Usage: obb mount <filename> <key> <ownerGid>", false);
457                return 0;
458            }
459            rc = vm->mountObb(argv[2], argv[3], atoi(argv[4]));
460    } else if (!strcmp(argv[1], "unmount")) {
461        dumpArgs(argc, argv, -1);
462        if (argc < 3) {
463            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: obb unmount <source file> [force]", false);
464            return 0;
465        }
466        bool force = false;
467        if (argc > 3 && !strcmp(argv[3], "force")) {
468            force = true;
469        }
470        rc = vm->unmountObb(argv[2], force);
471    } else if (!strcmp(argv[1], "path")) {
472        dumpArgs(argc, argv, -1);
473        if (argc != 3) {
474            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: obb path <source file>", false);
475            return 0;
476        }
477        char path[255];
478
479        if (!(rc = vm->getObbMountPath(argv[2], path, sizeof(path)))) {
480            cli->sendMsg(ResponseCode::AsecPathResult, path, false);
481            return 0;
482        }
483    } else {
484        dumpArgs(argc, argv, -1);
485        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown obb cmd", false);
486    }
487
488    if (!rc) {
489        cli->sendMsg(ResponseCode::CommandOkay, "obb operation succeeded", false);
490    } else {
491        rc = ResponseCode::convertFromErrno();
492        cli->sendMsg(rc, "obb operation failed", true);
493    }
494
495    return 0;
496}
497
498CommandListener::XwarpCmd::XwarpCmd() :
499                 VoldCommand("xwarp") {
500}
501
502int CommandListener::XwarpCmd::runCommand(SocketClient *cli,
503                                                      int argc, char **argv) {
504    if (argc < 2) {
505        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
506        return 0;
507    }
508
509    if (!strcmp(argv[1], "enable")) {
510        if (Xwarp::enable()) {
511            cli->sendMsg(ResponseCode::OperationFailed, "Failed to enable xwarp", true);
512            return 0;
513        }
514
515        cli->sendMsg(ResponseCode::CommandOkay, "Xwarp mirroring started", false);
516    } else if (!strcmp(argv[1], "disable")) {
517        if (Xwarp::disable()) {
518            cli->sendMsg(ResponseCode::OperationFailed, "Failed to disable xwarp", true);
519            return 0;
520        }
521
522        cli->sendMsg(ResponseCode::CommandOkay, "Xwarp disabled", false);
523    } else if (!strcmp(argv[1], "status")) {
524        char msg[255];
525        bool r;
526        unsigned mirrorPos, maxSize;
527
528        if (Xwarp::status(&r, &mirrorPos, &maxSize)) {
529            cli->sendMsg(ResponseCode::OperationFailed, "Failed to get xwarp status", true);
530            return 0;
531        }
532        snprintf(msg, sizeof(msg), "%s %u %u", (r ? "ready" : "not-ready"), mirrorPos, maxSize);
533        cli->sendMsg(ResponseCode::XwarpStatusResult, msg, false);
534    } else {
535        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown storage cmd", false);
536    }
537
538    return 0;
539}
540
541CommandListener::CryptfsCmd::CryptfsCmd() :
542                 VoldCommand("cryptfs") {
543}
544
545int CommandListener::CryptfsCmd::runCommand(SocketClient *cli,
546                                                      int argc, char **argv) {
547    if ((cli->getUid() != 0) && (cli->getUid() != AID_SYSTEM)) {
548        cli->sendMsg(ResponseCode::CommandNoPermission, "No permission to run cryptfs commands", false);
549        return 0;
550    }
551
552    if (argc < 2) {
553        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
554        return 0;
555    }
556
557    int rc = 0;
558
559    if (!strcmp(argv[1], "checkpw")) {
560        if (argc != 3) {
561            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs checkpw <passwd>", false);
562            return 0;
563        }
564        dumpArgs(argc, argv, 2);
565        rc = cryptfs_check_passwd(argv[2]);
566    } else if (!strcmp(argv[1], "restart")) {
567        if (argc != 2) {
568            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs restart", false);
569            return 0;
570        }
571        dumpArgs(argc, argv, -1);
572        rc = cryptfs_restart();
573    } else if (!strcmp(argv[1], "cryptocomplete")) {
574        if (argc != 2) {
575            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs cryptocomplete", false);
576            return 0;
577        }
578        dumpArgs(argc, argv, -1);
579        rc = cryptfs_crypto_complete();
580    } else if (!strcmp(argv[1], "enablecrypto")) {
581        if ( (argc != 4) || (strcmp(argv[2], "wipe") && strcmp(argv[2], "inplace")) ) {
582            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs enablecrypto <wipe|inplace> <passwd>", false);
583            return 0;
584        }
585        dumpArgs(argc, argv, 3);
586        rc = cryptfs_enable(argv[2], argv[3]);
587    } else if (!strcmp(argv[1], "changepw")) {
588        if (argc != 3) {
589            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs changepw <newpasswd>", false);
590            return 0;
591        }
592        SLOGD("cryptfs changepw {}");
593        rc = cryptfs_changepw(argv[2]);
594    } else if (!strcmp(argv[1], "verifypw")) {
595        if (argc != 3) {
596            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs verifypw <passwd>", false);
597            return 0;
598        }
599        SLOGD("cryptfs verifypw {}");
600        rc = cryptfs_verify_passwd(argv[2]);
601    } else {
602        dumpArgs(argc, argv, -1);
603        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown cryptfs cmd", false);
604    }
605
606    // Always report that the command succeeded and return the error code.
607    // The caller will check the return value to see what the error was.
608    char msg[255];
609    snprintf(msg, sizeof(msg), "%d", rc);
610    cli->sendMsg(ResponseCode::CommandOkay, msg, false);
611
612    return 0;
613}
614
615CommandListener::FstrimCmd::FstrimCmd() :
616                 VoldCommand("fstrim") {
617}
618int CommandListener::FstrimCmd::runCommand(SocketClient *cli,
619                                                      int argc, char **argv) {
620    if ((cli->getUid() != 0) && (cli->getUid() != AID_SYSTEM)) {
621        cli->sendMsg(ResponseCode::CommandNoPermission, "No permission to run fstrim commands", false);
622        return 0;
623    }
624
625    if (argc < 2) {
626        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing Argument", false);
627        return 0;
628    }
629
630    int rc = 0;
631
632    if (!strcmp(argv[1], "dotrim")) {
633        if (argc != 2) {
634            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: fstrim dotrim", false);
635            return 0;
636        }
637        dumpArgs(argc, argv, -1);
638        rc = fstrim_filesystems();
639    } else {
640        dumpArgs(argc, argv, -1);
641        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown fstrim cmd", false);
642    }
643
644    // Always report that the command succeeded and return the error code.
645    // The caller will check the return value to see what the error was.
646    char msg[255];
647    snprintf(msg, sizeof(msg), "%d", rc);
648    cli->sendMsg(ResponseCode::CommandOkay, msg, false);
649
650    return 0;
651}
652