installd.cpp revision 0274c977e3b10b52936fd5b2eb464857f0ca6358 
1/*
2** Copyright 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 <fcntl.h>
18#include <selinux/android.h>
19#include <selinux/avc.h>
20#include <sys/capability.h>
21#include <sys/fsuid.h>
22#include <sys/prctl.h>
23#include <sys/socket.h>
24#include <sys/stat.h>
25
26#include <android-base/logging.h>
27#include <cutils/fs.h>
28#include <cutils/log.h>               // TODO: Move everything to base::logging.
29#include <cutils/properties.h>
30#include <cutils/sockets.h>
31#include <private/android_filesystem_config.h>
32
33#include <commands.h>
34#include <globals.h>
35#include <installd_constants.h>
36#include <installd_deps.h>  // Need to fill in requirements of commands.
37#include <utils.h>
38
39#ifndef LOG_TAG
40#define LOG_TAG "installd"
41#endif
42#define SOCKET_PATH "installd"
43
44#define BUFFER_MAX    1024  /* input buffer for commands */
45#define TOKEN_MAX     16    /* max number of arguments in buffer */
46#define REPLY_MAX     256   /* largest reply allowed */
47
48namespace android {
49namespace installd {
50
51// Check that installd-deps sizes match cutils sizes.
52static_assert(kPropertyKeyMax == PROPERTY_KEY_MAX, "Size mismatch.");
53static_assert(kPropertyValueMax == PROPERTY_VALUE_MAX, "Size mismatch.");
54
55////////////////////////
56// Plug-in functions. //
57////////////////////////
58
59int get_property(const char *key, char *value, const char *default_value) {
60    return property_get(key, value, default_value);
61}
62
63// Compute the output path of
64bool calculate_oat_file_path(char path[PKG_PATH_MAX],
65                             const char *oat_dir,
66                             const char *apk_path,
67                             const char *instruction_set) {
68    const char *file_name_start;
69    const char *file_name_end;
70
71    file_name_start = strrchr(apk_path, '/');
72    if (file_name_start == NULL) {
73        ALOGE("apk_path '%s' has no '/'s in it\n", apk_path);
74        return false;
75    }
76    file_name_end = strrchr(apk_path, '.');
77    if (file_name_end < file_name_start) {
78        ALOGE("apk_path '%s' has no extension\n", apk_path);
79        return false;
80    }
81
82    // Calculate file_name
83    int file_name_len = file_name_end - file_name_start - 1;
84    char file_name[file_name_len + 1];
85    memcpy(file_name, file_name_start + 1, file_name_len);
86    file_name[file_name_len] = '\0';
87
88    // <apk_parent_dir>/oat/<isa>/<file_name>.odex
89    snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name);
90    return true;
91}
92
93/*
94 * Computes the odex file for the given apk_path and instruction_set.
95 * /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex
96 *
97 * Returns false if it failed to determine the odex file path.
98 */
99bool calculate_odex_file_path(char path[PKG_PATH_MAX],
100                              const char *apk_path,
101                              const char *instruction_set) {
102    if (strlen(apk_path) + strlen("oat/") + strlen(instruction_set)
103            + strlen("/") + strlen("odex") + 1 > PKG_PATH_MAX) {
104        ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path);
105        return false;
106    }
107
108    strcpy(path, apk_path);
109    char *end = strrchr(path, '/');
110    if (end == NULL) {
111        ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path);
112        return false;
113    }
114    const char *apk_end = apk_path + (end - path); // strrchr(apk_path, '/');
115
116    strcpy(end + 1, "oat/");       // path = /system/framework/oat/\0
117    strcat(path, instruction_set); // path = /system/framework/oat/<isa>\0
118    strcat(path, apk_end);         // path = /system/framework/oat/<isa>/whatever.jar\0
119    end = strrchr(path, '.');
120    if (end == NULL) {
121        ALOGE("apk_path '%s' has no extension.\n", apk_path);
122        return false;
123    }
124    strcpy(end + 1, "odex");
125    return true;
126}
127
128bool create_cache_path(char path[PKG_PATH_MAX],
129                       const char *src,
130                       const char *instruction_set) {
131    /* demand that we are an absolute path */
132    if ((src == nullptr) || (src[0] != '/') || strstr(src,"..")) {
133        return false;
134    }
135
136    size_t srclen = strlen(src);
137
138    if (srclen > PKG_PATH_MAX) {        // XXX: PKG_NAME_MAX?
139        return false;
140    }
141
142    size_t dstlen =
143        android_data_dir.len +
144        strlen(DALVIK_CACHE) +
145        1 +
146        strlen(instruction_set) +
147        srclen +
148        strlen(DALVIK_CACHE_POSTFIX) + 2;
149
150    if (dstlen > PKG_PATH_MAX) {
151        return false;
152    }
153
154    sprintf(path,"%s%s/%s/%s",
155            android_data_dir.path,
156            DALVIK_CACHE,
157            instruction_set,
158            src + 1 /* skip the leading / */);
159
160    char* tmp =
161            path +
162            android_data_dir.len +
163            strlen(DALVIK_CACHE) +
164            1 +
165            strlen(instruction_set) + 1;
166
167    for(; *tmp; tmp++) {
168        if (*tmp == '/') {
169            *tmp = '@';
170        }
171    }
172
173    strcat(path, DALVIK_CACHE_POSTFIX);
174    return true;
175}
176
177
178static char* parse_null(char* arg) {
179    if (strcmp(arg, "!") == 0) {
180        return nullptr;
181    } else {
182        return arg;
183    }
184}
185
186static int do_ping(char **arg ATTRIBUTE_UNUSED, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
187{
188    return 0;
189}
190
191static int do_restorecon_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
192    /* const char* uuid, const char* pkgName, userid_t userid, int flags,
193            appid_t appid, const char* seinfo */
194    return restorecon_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atoi(arg[4]), arg[5]);
195}
196
197static int do_migrate_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
198    /* const char *uuid, const char *pkgname, userid_t userid, int flags */
199    return migrate_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]));
200}
201
202static int do_clear_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
203    /* const char *uuid, const char *pkgname, userid_t userid, int flags, ino_t ce_data_inode */
204    return clear_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]));
205}
206
207static int do_destroy_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
208    /* const char *uuid, const char *pkgname, userid_t userid, int flags, ino_t ce_data_inode */
209    return destroy_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]));
210}
211
212// We use otapreopt_chroot to get into the chroot.
213static constexpr const char* kOtaPreopt = "/system/bin/otapreopt_chroot";
214
215static int do_ota_dexopt(const char* args[DEXOPT_PARAM_COUNT],
216                         char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
217    // Time to fork and run otapreopt.
218
219    // Check that the tool exists.
220    struct stat s;
221    if (stat(kOtaPreopt, &s) != 0) {
222        LOG(ERROR) << "Otapreopt chroot tool not found.";
223        return -1;
224    }
225
226    pid_t pid = fork();
227    if (pid == 0) {
228        const char* argv[1 + DEXOPT_PARAM_COUNT + 1];
229        argv[0] = kOtaPreopt;
230
231        for (size_t i = 0; i < DEXOPT_PARAM_COUNT; ++i) {
232            argv[i + 1] = args[i];
233        }
234
235        argv[DEXOPT_PARAM_COUNT + 1] = nullptr;
236
237        execv(argv[0], (char * const *)argv);
238        PLOG(ERROR) << "execv(OTAPREOPT_CHROOT) failed";
239        exit(99);
240    } else {
241        int res = wait_child(pid);
242        if (res == 0) {
243            ALOGV("DexInv: --- END OTAPREOPT (success) ---\n");
244        } else {
245            ALOGE("DexInv: --- END OTAPREOPT --- status=0x%04x, process failed\n", res);
246        }
247        return res;
248    }
249}
250
251static int do_regular_dexopt(const char* args[DEXOPT_PARAM_COUNT],
252                             char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
253    return dexopt(args);
254}
255
256using DexoptFn = int (*)(const char* args[DEXOPT_PARAM_COUNT],
257                         char reply[REPLY_MAX]);
258
259static int do_dexopt(char **arg, char reply[REPLY_MAX])
260{
261    const char* args[DEXOPT_PARAM_COUNT];
262    for (size_t i = 0; i < DEXOPT_PARAM_COUNT; ++i) {
263        CHECK(arg[i] != nullptr);
264        args[i] = arg[i];
265    }
266
267    int dexopt_flags = atoi(arg[6]);
268    DexoptFn dexopt_fn;
269    if ((dexopt_flags & DEXOPT_OTA) != 0) {
270        dexopt_fn = do_ota_dexopt;
271    } else {
272        dexopt_fn = do_regular_dexopt;
273    }
274    return dexopt_fn(args, reply);
275}
276
277static int do_merge_profiles(char **arg, char reply[REPLY_MAX])
278{
279    uid_t uid = static_cast<uid_t>(atoi(arg[0]));
280    const char* pkgname = arg[1];
281    if (merge_profiles(uid, pkgname)) {
282        strncpy(reply, "true", REPLY_MAX);
283    } else {
284        strncpy(reply, "false", REPLY_MAX);
285    }
286    return 0;
287}
288
289static int do_dump_profiles(char **arg, char reply[REPLY_MAX])
290{
291    uid_t uid = static_cast<uid_t>(atoi(arg[0]));
292    const char* pkgname = arg[1];
293    const char* dex_files = arg[2];
294    if (dump_profile(uid, pkgname, dex_files)) {
295        strncpy(reply, "true", REPLY_MAX);
296    } else {
297        strncpy(reply, "false", REPLY_MAX);
298    }
299    return 0;
300}
301
302static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
303{
304    return mark_boot_complete(arg[0] /* instruction set */);
305}
306
307static int do_rm_dex(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
308{
309    return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */
310}
311
312static int do_free_cache(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) /* TODO int:free_size */
313{
314    return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */
315}
316
317static int do_get_app_size(char **arg, char reply[REPLY_MAX]) {
318    int64_t codesize = 0;
319    int64_t datasize = 0;
320    int64_t cachesize = 0;
321    int64_t asecsize = 0;
322    int res = 0;
323
324    /* const char *uuid, const char *pkgname, int userid, int flags, ino_t ce_data_inode,
325            const char* code_path */
326    res = get_app_size(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]),
327            arg[5], &codesize, &datasize, &cachesize, &asecsize);
328
329    /*
330     * Each int64_t can take up 22 characters printed out. Make sure it
331     * doesn't go over REPLY_MAX in the future.
332     */
333    snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64,
334            codesize, datasize, cachesize, asecsize);
335    return res;
336}
337
338static int do_get_app_data_inode(char **arg, char reply[REPLY_MAX]) {
339    ino_t inode = 0;
340    int res = 0;
341
342    /* const char *uuid, const char *pkgname, int userid, int flags */
343    res = get_app_data_inode(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), &inode);
344
345    snprintf(reply, REPLY_MAX, "%" PRId64, (int64_t) inode);
346    return res;
347}
348
349static int do_create_user_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
350{
351    /* const char *uuid, userid_t userid, int user_serial, int flags */
352    return create_user_data(parse_null(arg[0]), atoi(arg[1]), atoi(arg[2]), atoi(arg[3]));
353}
354
355static int do_destroy_user_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
356{
357    /* const char *uuid, userid_t userid, int flags */
358    return destroy_user_data(parse_null(arg[0]), atoi(arg[1]), atoi(arg[2]));
359}
360
361static int do_linklib(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
362{
363    return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3]));
364}
365
366static int do_idmap(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
367{
368    return idmap(arg[0], arg[1], atoi(arg[2]));
369}
370
371static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
372{
373    /* oat_dir, instruction_set */
374    return create_oat_dir(arg[0], arg[1]);
375}
376
377static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
378{
379    /* oat_dir */
380    return rm_package_dir(arg[0]);
381}
382
383static int do_clear_app_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
384{
385    /* package_name */
386    return clear_app_profiles(arg[0]);
387}
388
389static int do_destroy_app_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
390{
391    /* package_name */
392    return destroy_app_profiles(arg[0]);
393}
394
395static int do_link_file(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
396{
397    /* relative_path, from_base, to_base */
398    return link_file(arg[0], arg[1], arg[2]);
399}
400
401static int do_move_ab(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
402    // apk_path, instruction_set, oat_dir
403    return move_ab(arg[0], arg[1], arg[2]);
404}
405
406static int do_delete_odex(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
407    // apk_path, instruction_set, oat_dir
408    return delete_odex(arg[0], arg[1], arg[2]) ? 0 : -1;
409}
410
411struct cmdinfo {
412    const char *name;
413    unsigned numargs;
414    int (*func)(char **arg, char reply[REPLY_MAX]);
415};
416
417struct cmdinfo cmds[] = {
418    { "ping",                 0, do_ping },
419
420    { "restorecon_app_data",  6, do_restorecon_app_data },
421    { "migrate_app_data",     4, do_migrate_app_data },
422    { "clear_app_data",       5, do_clear_app_data },
423    { "destroy_app_data",     5, do_destroy_app_data },
424    { "get_app_size",         6, do_get_app_size },
425    { "get_app_data_inode",   4, do_get_app_data_inode },
426
427    { "create_user_data",     4, do_create_user_data },
428    { "destroy_user_data",    3, do_destroy_user_data },
429
430    { "dexopt",              10, do_dexopt },
431    { "markbootcomplete",     1, do_mark_boot_complete },
432    { "rmdex",                2, do_rm_dex },
433    { "freecache",            2, do_free_cache },
434    { "linklib",              4, do_linklib },
435    { "idmap",                3, do_idmap },
436    { "createoatdir",         2, do_create_oat_dir },
437    { "rmpackagedir",         1, do_rm_package_dir },
438    { "clear_app_profiles",   1, do_clear_app_profiles },
439    { "destroy_app_profiles", 1, do_destroy_app_profiles },
440    { "linkfile",             3, do_link_file },
441    { "move_ab",              3, do_move_ab },
442    { "merge_profiles",       2, do_merge_profiles },
443    { "dump_profiles",        3, do_dump_profiles },
444    { "delete_odex",          3, do_delete_odex },
445};
446
447static int readx(int s, void *_buf, int count)
448{
449    char *buf = (char *) _buf;
450    int n = 0, r;
451    if (count < 0) return -1;
452    while (n < count) {
453        r = read(s, buf + n, count - n);
454        if (r < 0) {
455            if (errno == EINTR) continue;
456            ALOGE("read error: %s\n", strerror(errno));
457            return -1;
458        }
459        if (r == 0) {
460            ALOGE("eof\n");
461            return -1; /* EOF */
462        }
463        n += r;
464    }
465    return 0;
466}
467
468static int writex(int s, const void *_buf, int count)
469{
470    const char *buf = (const char *) _buf;
471    int n = 0, r;
472    if (count < 0) return -1;
473    while (n < count) {
474        r = write(s, buf + n, count - n);
475        if (r < 0) {
476            if (errno == EINTR) continue;
477            ALOGE("write error: %s\n", strerror(errno));
478            return -1;
479        }
480        n += r;
481    }
482    return 0;
483}
484
485
486/* Tokenize the command buffer, locate a matching command,
487 * ensure that the required number of arguments are provided,
488 * call the function(), return the result.
489 */
490static int execute(int s, char cmd[BUFFER_MAX])
491{
492    char reply[REPLY_MAX];
493    char *arg[TOKEN_MAX+1];
494    unsigned i;
495    unsigned n = 0;
496    unsigned short count;
497    int ret = -1;
498
499    // ALOGI("execute('%s')\n", cmd);
500
501        /* default reply is "" */
502    reply[0] = 0;
503
504        /* n is number of args (not counting arg[0]) */
505    arg[0] = cmd;
506    while (*cmd) {
507        if (isspace(*cmd)) {
508            *cmd++ = 0;
509            n++;
510            arg[n] = cmd;
511            if (n == TOKEN_MAX) {
512                ALOGE("too many arguments\n");
513                goto done;
514            }
515        }
516        if (*cmd) {
517          cmd++;
518        }
519    }
520
521    for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) {
522        if (!strcmp(cmds[i].name,arg[0])) {
523            if (n != cmds[i].numargs) {
524                ALOGE("%s requires %d arguments (%d given)\n",
525                     cmds[i].name, cmds[i].numargs, n);
526            } else {
527                ret = cmds[i].func(arg + 1, reply);
528            }
529            goto done;
530        }
531    }
532    ALOGE("unsupported command '%s'\n", arg[0]);
533
534done:
535    if (reply[0]) {
536        n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply);
537    } else {
538        n = snprintf(cmd, BUFFER_MAX, "%d", ret);
539    }
540    if (n > BUFFER_MAX) n = BUFFER_MAX;
541    count = n;
542
543    // ALOGI("reply: '%s'\n", cmd);
544    if (writex(s, &count, sizeof(count))) return -1;
545    if (writex(s, cmd, count)) return -1;
546    return 0;
547}
548
549static bool initialize_globals() {
550    const char* data_path = getenv("ANDROID_DATA");
551    if (data_path == nullptr) {
552        ALOGE("Could not find ANDROID_DATA");
553        return false;
554    }
555    const char* root_path = getenv("ANDROID_ROOT");
556    if (root_path == nullptr) {
557        ALOGE("Could not find ANDROID_ROOT");
558        return false;
559    }
560
561    return init_globals_from_data_and_root(data_path, root_path);
562}
563
564static int initialize_directories() {
565    int res = -1;
566
567    // Read current filesystem layout version to handle upgrade paths
568    char version_path[PATH_MAX];
569    snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path);
570
571    int oldVersion;
572    if (fs_read_atomic_int(version_path, &oldVersion) == -1) {
573        oldVersion = 0;
574    }
575    int version = oldVersion;
576
577    if (version < 2) {
578        SLOGD("Assuming that device has multi-user storage layout; upgrade no longer supported");
579        version = 2;
580    }
581
582    if (ensure_config_user_dirs(0) == -1) {
583        ALOGE("Failed to setup misc for user 0");
584        goto fail;
585    }
586
587    if (version == 2) {
588        ALOGD("Upgrading to /data/misc/user directories");
589
590        char misc_dir[PATH_MAX];
591        snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path);
592
593        char keychain_added_dir[PATH_MAX];
594        snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir);
595
596        char keychain_removed_dir[PATH_MAX];
597        snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir);
598
599        DIR *dir;
600        struct dirent *dirent;
601        dir = opendir("/data/user");
602        if (dir != NULL) {
603            while ((dirent = readdir(dir))) {
604                const char *name = dirent->d_name;
605
606                // skip "." and ".."
607                if (name[0] == '.') {
608                    if (name[1] == 0) continue;
609                    if ((name[1] == '.') && (name[2] == 0)) continue;
610                }
611
612                uint32_t user_id = atoi(name);
613
614                // /data/misc/user/<user_id>
615                if (ensure_config_user_dirs(user_id) == -1) {
616                    goto fail;
617                }
618
619                char misc_added_dir[PATH_MAX];
620                snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name);
621
622                char misc_removed_dir[PATH_MAX];
623                snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name);
624
625                uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM);
626                gid_t gid = uid;
627                if (access(keychain_added_dir, F_OK) == 0) {
628                    if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) {
629                        ALOGE("Some files failed to copy");
630                    }
631                }
632                if (access(keychain_removed_dir, F_OK) == 0) {
633                    if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) {
634                        ALOGE("Some files failed to copy");
635                    }
636                }
637            }
638            closedir(dir);
639
640            if (access(keychain_added_dir, F_OK) == 0) {
641                delete_dir_contents(keychain_added_dir, 1, 0);
642            }
643            if (access(keychain_removed_dir, F_OK) == 0) {
644                delete_dir_contents(keychain_removed_dir, 1, 0);
645            }
646        }
647
648        version = 3;
649    }
650
651    // Persist layout version if changed
652    if (version != oldVersion) {
653        if (fs_write_atomic_int(version_path, version) == -1) {
654            ALOGE("Failed to save version to %s: %s", version_path, strerror(errno));
655            goto fail;
656        }
657    }
658
659    // Success!
660    res = 0;
661
662fail:
663    return res;
664}
665
666static int log_callback(int type, const char *fmt, ...) {
667    va_list ap;
668    int priority;
669
670    switch (type) {
671    case SELINUX_WARNING:
672        priority = ANDROID_LOG_WARN;
673        break;
674    case SELINUX_INFO:
675        priority = ANDROID_LOG_INFO;
676        break;
677    default:
678        priority = ANDROID_LOG_ERROR;
679        break;
680    }
681    va_start(ap, fmt);
682    LOG_PRI_VA(priority, "SELinux", fmt, ap);
683    va_end(ap);
684    return 0;
685}
686
687static int installd_main(const int argc ATTRIBUTE_UNUSED, char *argv[]) {
688    char buf[BUFFER_MAX];
689    struct sockaddr addr;
690    socklen_t alen;
691    int lsocket, s, ret;
692    int selinux_enabled = (is_selinux_enabled() > 0);
693
694    setenv("ANDROID_LOG_TAGS", "*:v", 1);
695    android::base::InitLogging(argv);
696
697    ALOGI("installd firing up\n");
698
699    union selinux_callback cb;
700    cb.func_log = log_callback;
701    selinux_set_callback(SELINUX_CB_LOG, cb);
702
703    if (!initialize_globals()) {
704        ALOGE("Could not initialize globals; exiting.\n");
705        exit(1);
706    }
707
708    if (initialize_directories() < 0) {
709        ALOGE("Could not create directories; exiting.\n");
710        exit(1);
711    }
712
713    if (selinux_enabled && selinux_status_open(true) < 0) {
714        ALOGE("Could not open selinux status; exiting.\n");
715        exit(1);
716    }
717
718    if ((ret = InstalldNativeService::start()) != android::OK) {
719        ALOGE("Unable to start InstalldNativeService: %d", ret);
720        exit(1);
721    }
722
723    lsocket = android_get_control_socket(SOCKET_PATH);
724    if (lsocket < 0) {
725        ALOGE("Failed to get socket from environment: %s\n", strerror(errno));
726        exit(1);
727    }
728    if (listen(lsocket, 5)) {
729        ALOGE("Listen on socket failed: %s\n", strerror(errno));
730        exit(1);
731    }
732    fcntl(lsocket, F_SETFD, FD_CLOEXEC);
733
734    for (;;) {
735        alen = sizeof(addr);
736        s = accept(lsocket, &addr, &alen);
737        if (s < 0) {
738            ALOGE("Accept failed: %s\n", strerror(errno));
739            continue;
740        }
741        fcntl(s, F_SETFD, FD_CLOEXEC);
742
743        ALOGI("new connection\n");
744        for (;;) {
745            unsigned short count;
746            if (readx(s, &count, sizeof(count))) {
747                ALOGE("failed to read size\n");
748                break;
749            }
750            if ((count < 1) || (count >= BUFFER_MAX)) {
751                ALOGE("invalid size %d\n", count);
752                break;
753            }
754            if (readx(s, buf, count)) {
755                ALOGE("failed to read command\n");
756                break;
757            }
758            buf[count] = 0;
759            if (selinux_enabled && selinux_status_updated() > 0) {
760                selinux_android_seapp_context_reload();
761            }
762            if (execute(s, buf)) break;
763        }
764        ALOGI("closing connection\n");
765        close(s);
766    }
767
768    return 0;
769}
770
771}  // namespace installd
772}  // namespace android
773
774int main(const int argc, char *argv[]) {
775    return android::installd::installd_main(argc, argv);
776}
777