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 <sys/capability.h>
18#include "installd.h"
19#include <diskusage/dirsize.h>
20#include <selinux/android.h>
21
22/* Directory records that are used in execution of commands. */
23dir_rec_t android_data_dir;
24dir_rec_t android_asec_dir;
25dir_rec_t android_app_dir;
26dir_rec_t android_app_private_dir;
27dir_rec_t android_app_lib_dir;
28dir_rec_t android_media_dir;
29dir_rec_array_t android_system_dirs;
30
31int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo)
32{
33    char pkgdir[PKG_PATH_MAX];
34    char libsymlink[PKG_PATH_MAX];
35    char applibdir[PKG_PATH_MAX];
36    struct stat libStat;
37
38    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
39        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
40        return -1;
41    }
42
43    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
44        ALOGE("cannot create package path\n");
45        return -1;
46    }
47
48    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
49        ALOGE("cannot create package lib symlink origin path\n");
50        return -1;
51    }
52
53    if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
54        ALOGE("cannot create package lib symlink dest path\n");
55        return -1;
56    }
57
58    if (mkdir(pkgdir, 0751) < 0) {
59        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
60        return -1;
61    }
62    if (chmod(pkgdir, 0751) < 0) {
63        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
64        unlink(pkgdir);
65        return -1;
66    }
67
68    if (lstat(libsymlink, &libStat) < 0) {
69        if (errno != ENOENT) {
70            ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
71            return -1;
72        }
73    } else {
74        if (S_ISDIR(libStat.st_mode)) {
75            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
76                ALOGE("couldn't delete lib directory during install for: %s", libsymlink);
77                return -1;
78            }
79        } else if (S_ISLNK(libStat.st_mode)) {
80            if (unlink(libsymlink) < 0) {
81                ALOGE("couldn't unlink lib directory during install for: %s", libsymlink);
82                return -1;
83            }
84        }
85    }
86
87    if (symlink(applibdir, libsymlink) < 0) {
88        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
89                strerror(errno));
90        unlink(pkgdir);
91        return -1;
92    }
93
94    if (selinux_android_setfilecon2(pkgdir, pkgname, seinfo, uid) < 0) {
95        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
96        unlink(libsymlink);
97        unlink(pkgdir);
98        return -errno;
99    }
100
101    if (chown(pkgdir, uid, gid) < 0) {
102        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
103        unlink(libsymlink);
104        unlink(pkgdir);
105        return -1;
106    }
107
108    return 0;
109}
110
111int uninstall(const char *pkgname, userid_t userid)
112{
113    char pkgdir[PKG_PATH_MAX];
114
115    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
116        return -1;
117
118    /* delete contents AND directory, no exceptions */
119    return delete_dir_contents(pkgdir, 1, NULL);
120}
121
122int renamepkg(const char *oldpkgname, const char *newpkgname)
123{
124    char oldpkgdir[PKG_PATH_MAX];
125    char newpkgdir[PKG_PATH_MAX];
126
127    if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
128        return -1;
129    if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
130        return -1;
131
132    if (rename(oldpkgdir, newpkgdir) < 0) {
133        ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
134        return -errno;
135    }
136    return 0;
137}
138
139int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
140{
141    char pkgdir[PKG_PATH_MAX];
142    struct stat s;
143    int rc = 0;
144
145    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
146        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
147        return -1;
148    }
149
150    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
151        ALOGE("cannot create package path\n");
152        return -1;
153    }
154
155    if (stat(pkgdir, &s) < 0) return -1;
156
157    if (s.st_uid != 0 || s.st_gid != 0) {
158        ALOGE("fixing uid of non-root pkg: %s %lu %lu\n", pkgdir, s.st_uid, s.st_gid);
159        return -1;
160    }
161
162    if (chmod(pkgdir, 0751) < 0) {
163        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
164        unlink(pkgdir);
165        return -errno;
166    }
167    if (chown(pkgdir, uid, gid) < 0) {
168        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
169        unlink(pkgdir);
170        return -errno;
171    }
172
173    return 0;
174}
175
176int delete_user_data(const char *pkgname, userid_t userid)
177{
178    char pkgdir[PKG_PATH_MAX];
179
180    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
181        return -1;
182
183    /* delete contents, excluding "lib", but not the directory itself */
184    return delete_dir_contents(pkgdir, 0, "lib");
185}
186
187int make_user_data(const char *pkgname, uid_t uid, userid_t userid)
188{
189    char pkgdir[PKG_PATH_MAX];
190    char applibdir[PKG_PATH_MAX];
191    char libsymlink[PKG_PATH_MAX];
192    struct stat libStat;
193
194    // Create the data dir for the package
195    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) {
196        return -1;
197    }
198    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userid)) {
199        ALOGE("cannot create package lib symlink origin path\n");
200        return -1;
201    }
202    if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
203        ALOGE("cannot create package lib symlink dest path\n");
204        return -1;
205    }
206
207    if (mkdir(pkgdir, 0751) < 0) {
208        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
209        return -errno;
210    }
211    if (chmod(pkgdir, 0751) < 0) {
212        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
213        unlink(pkgdir);
214        return -errno;
215    }
216
217    if (lstat(libsymlink, &libStat) < 0) {
218        if (errno != ENOENT) {
219            ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno));
220            unlink(pkgdir);
221            return -1;
222        }
223    } else {
224        if (S_ISDIR(libStat.st_mode)) {
225            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
226                ALOGE("couldn't delete lib directory during install for non-primary: %s",
227                        libsymlink);
228                unlink(pkgdir);
229                return -1;
230            }
231        } else if (S_ISLNK(libStat.st_mode)) {
232            if (unlink(libsymlink) < 0) {
233                ALOGE("couldn't unlink lib directory during install for non-primary: %s",
234                        libsymlink);
235                unlink(pkgdir);
236                return -1;
237            }
238        }
239    }
240
241    if (symlink(applibdir, libsymlink) < 0) {
242        ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink,
243                applibdir, strerror(errno));
244        unlink(pkgdir);
245        return -1;
246    }
247
248    if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
249        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
250        unlink(libsymlink);
251        unlink(pkgdir);
252        return -errno;
253    }
254
255    if (chown(pkgdir, uid, uid) < 0) {
256        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
257        unlink(libsymlink);
258        unlink(pkgdir);
259        return -errno;
260    }
261
262    return 0;
263}
264
265int delete_user(userid_t userid)
266{
267    char data_path[PKG_PATH_MAX];
268    if (create_user_path(data_path, userid)) {
269        return -1;
270    }
271    if (delete_dir_contents(data_path, 1, NULL)) {
272        return -1;
273    }
274
275    char media_path[PATH_MAX];
276    if (create_user_media_path(media_path, userid) == -1) {
277        return -1;
278    }
279    if (delete_dir_contents(media_path, 1, NULL) == -1) {
280        return -1;
281    }
282
283    return 0;
284}
285
286int delete_cache(const char *pkgname, userid_t userid)
287{
288    char cachedir[PKG_PATH_MAX];
289
290    if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, userid))
291        return -1;
292
293        /* delete contents, not the directory, no exceptions */
294    return delete_dir_contents(cachedir, 0, 0);
295}
296
297/* Try to ensure free_size bytes of storage are available.
298 * Returns 0 on success.
299 * This is rather simple-minded because doing a full LRU would
300 * be potentially memory-intensive, and without atime it would
301 * also require that apps constantly modify file metadata even
302 * when just reading from the cache, which is pretty awful.
303 */
304int free_cache(int64_t free_size)
305{
306    cache_t* cache;
307    int64_t avail;
308    DIR *d;
309    struct dirent *de;
310    char tmpdir[PATH_MAX];
311    char *dirpos;
312
313    avail = data_disk_free();
314    if (avail < 0) return -1;
315
316    ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
317    if (avail >= free_size) return 0;
318
319    cache = start_cache_collection();
320
321    // Collect cache files for primary user.
322    if (create_user_path(tmpdir, 0) == 0) {
323        //ALOGI("adding cache files from %s\n", tmpdir);
324        add_cache_files(cache, tmpdir, "cache");
325    }
326
327    // Search for other users and add any cache files from them.
328    snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
329            SECONDARY_USER_PREFIX);
330    dirpos = tmpdir + strlen(tmpdir);
331    d = opendir(tmpdir);
332    if (d != NULL) {
333        while ((de = readdir(d))) {
334            if (de->d_type == DT_DIR) {
335                const char *name = de->d_name;
336                    /* always skip "." and ".." */
337                if (name[0] == '.') {
338                    if (name[1] == 0) continue;
339                    if ((name[1] == '.') && (name[2] == 0)) continue;
340                }
341                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
342                    strcpy(dirpos, name);
343                    //ALOGI("adding cache files from %s\n", tmpdir);
344                    add_cache_files(cache, tmpdir, "cache");
345                } else {
346                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
347                }
348            }
349        }
350        closedir(d);
351    }
352
353    // Collect cache files on external storage for all users (if it is mounted as part
354    // of the internal storage).
355    strcpy(tmpdir, android_media_dir.path);
356    dirpos = tmpdir + strlen(tmpdir);
357    d = opendir(tmpdir);
358    if (d != NULL) {
359        while ((de = readdir(d))) {
360            if (de->d_type == DT_DIR) {
361                const char *name = de->d_name;
362                    /* skip any dir that doesn't start with a number, so not a user */
363                if (name[0] < '0' || name[0] > '9') {
364                    continue;
365                }
366                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
367                    strcpy(dirpos, name);
368                    if (lookup_media_dir(tmpdir, "Android") == 0
369                            && lookup_media_dir(tmpdir, "data") == 0) {
370                        //ALOGI("adding cache files from %s\n", tmpdir);
371                        add_cache_files(cache, tmpdir, "cache");
372                    }
373                } else {
374                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
375                }
376            }
377        }
378        closedir(d);
379    }
380
381    clear_cache_files(cache, free_size);
382    finish_cache_collection(cache);
383
384    return data_disk_free() >= free_size ? 0 : -1;
385}
386
387int move_dex(const char *src, const char *dst)
388{
389    char src_dex[PKG_PATH_MAX];
390    char dst_dex[PKG_PATH_MAX];
391
392    if (validate_apk_path(src)) return -1;
393    if (validate_apk_path(dst)) return -1;
394
395    if (create_cache_path(src_dex, src)) return -1;
396    if (create_cache_path(dst_dex, dst)) return -1;
397
398    ALOGV("move %s -> %s\n", src_dex, dst_dex);
399    if (rename(src_dex, dst_dex) < 0) {
400        ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
401        return -1;
402    } else {
403        return 0;
404    }
405}
406
407int rm_dex(const char *path)
408{
409    char dex_path[PKG_PATH_MAX];
410
411    if (validate_apk_path(path)) return -1;
412    if (create_cache_path(dex_path, path)) return -1;
413
414    ALOGV("unlink %s\n", dex_path);
415    if (unlink(dex_path) < 0) {
416        ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
417        return -1;
418    } else {
419        return 0;
420    }
421}
422
423int get_size(const char *pkgname, userid_t userid, const char *apkpath,
424             const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath,
425             int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize,
426             int64_t* _asecsize)
427{
428    DIR *d;
429    int dfd;
430    struct dirent *de;
431    struct stat s;
432    char path[PKG_PATH_MAX];
433
434    int64_t codesize = 0;
435    int64_t datasize = 0;
436    int64_t cachesize = 0;
437    int64_t asecsize = 0;
438
439        /* count the source apk as code -- but only if it's not
440         * on the /system partition and its not on the sdcard.
441         */
442    if (validate_system_app_path(apkpath) &&
443            strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
444        if (stat(apkpath, &s) == 0) {
445            codesize += stat_size(&s);
446        }
447    }
448        /* count the forward locked apk as code if it is given
449         */
450    if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
451        if (stat(fwdlock_apkpath, &s) == 0) {
452            codesize += stat_size(&s);
453        }
454    }
455        /* count the cached dexfile as code */
456    if (!create_cache_path(path, apkpath)) {
457        if (stat(path, &s) == 0) {
458            codesize += stat_size(&s);
459        }
460    }
461
462        /* add in size of any libraries */
463    if (libdirpath != NULL && libdirpath[0] != '!') {
464        d = opendir(libdirpath);
465        if (d != NULL) {
466            dfd = dirfd(d);
467            codesize += calculate_dir_size(dfd);
468            closedir(d);
469        }
470    }
471
472        /* compute asec size if it is given
473         */
474    if (asecpath != NULL && asecpath[0] != '!') {
475        if (stat(asecpath, &s) == 0) {
476            asecsize += stat_size(&s);
477        }
478    }
479
480    if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, userid)) {
481        goto done;
482    }
483
484    d = opendir(path);
485    if (d == NULL) {
486        goto done;
487    }
488    dfd = dirfd(d);
489
490    /* most stuff in the pkgdir is data, except for the "cache"
491     * directory and below, which is cache, and the "lib" directory
492     * and below, which is code...
493     */
494    while ((de = readdir(d))) {
495        const char *name = de->d_name;
496
497        if (de->d_type == DT_DIR) {
498            int subfd;
499            int64_t statsize = 0;
500            int64_t dirsize = 0;
501                /* always skip "." and ".." */
502            if (name[0] == '.') {
503                if (name[1] == 0) continue;
504                if ((name[1] == '.') && (name[2] == 0)) continue;
505            }
506            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
507                statsize = stat_size(&s);
508            }
509            subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
510            if (subfd >= 0) {
511                dirsize = calculate_dir_size(subfd);
512            }
513            if(!strcmp(name,"lib")) {
514                codesize += dirsize + statsize;
515            } else if(!strcmp(name,"cache")) {
516                cachesize += dirsize + statsize;
517            } else {
518                datasize += dirsize + statsize;
519            }
520        } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
521            // This is the symbolic link to the application's library
522            // code.  We'll count this as code instead of data, since
523            // it is not something that the app creates.
524            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
525                codesize += stat_size(&s);
526            }
527        } else {
528            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
529                datasize += stat_size(&s);
530            }
531        }
532    }
533    closedir(d);
534done:
535    *_codesize = codesize;
536    *_datasize = datasize;
537    *_cachesize = cachesize;
538    *_asecsize = asecsize;
539    return 0;
540}
541
542
543int create_cache_path(char path[PKG_PATH_MAX], const char *src)
544{
545    char *tmp;
546    int srclen;
547    int dstlen;
548
549    srclen = strlen(src);
550
551        /* demand that we are an absolute path */
552    if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
553        return -1;
554    }
555
556    if (srclen > PKG_PATH_MAX) {        // XXX: PKG_NAME_MAX?
557        return -1;
558    }
559
560    dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
561        strlen(DALVIK_CACHE_POSTFIX) + 1;
562
563    if (dstlen > PKG_PATH_MAX) {
564        return -1;
565    }
566
567    sprintf(path,"%s%s%s",
568            DALVIK_CACHE_PREFIX,
569            src + 1, /* skip the leading / */
570            DALVIK_CACHE_POSTFIX);
571
572    for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) {
573        if (*tmp == '/') {
574            *tmp = '@';
575        }
576    }
577
578    return 0;
579}
580
581static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
582    const char* output_file_name, const char* dexopt_flags)
583{
584    static const char* DEX_OPT_BIN = "/system/bin/dexopt";
585    static const int MAX_INT_LEN = 12;      // '-'+10dig+'\0' -OR- 0x+8dig
586    char zip_num[MAX_INT_LEN];
587    char odex_num[MAX_INT_LEN];
588
589    sprintf(zip_num, "%d", zip_fd);
590    sprintf(odex_num, "%d", odex_fd);
591
592    ALOGV("Running %s in=%s out=%s\n", DEX_OPT_BIN, input_file_name, output_file_name);
593    execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
594        dexopt_flags, (char*) NULL);
595    ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
596}
597
598static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name,
599    const char* output_file_name, const char* dexopt_flags)
600{
601    static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
602    static const int MAX_INT_LEN = 12;      // '-'+10dig+'\0' -OR- 0x+8dig
603    char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
604    char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
605    char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
606    char oat_location_arg[strlen("--oat-name=") + PKG_PATH_MAX];
607
608    sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
609    sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
610    sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
611    sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
612
613    ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
614    execl(DEX2OAT_BIN, DEX2OAT_BIN,
615          zip_fd_arg, zip_location_arg,
616          oat_fd_arg, oat_location_arg,
617          (char*) NULL);
618    ALOGE("execl(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
619}
620
621static int wait_dexopt(pid_t pid, const char* apk_path)
622{
623    int status;
624    pid_t got_pid;
625
626    /*
627     * Wait for the optimization process to finish.
628     */
629    while (1) {
630        got_pid = waitpid(pid, &status, 0);
631        if (got_pid == -1 && errno == EINTR) {
632            printf("waitpid interrupted, retrying\n");
633        } else {
634            break;
635        }
636    }
637    if (got_pid != pid) {
638        ALOGW("waitpid failed: wanted %d, got %d: %s\n",
639            (int) pid, (int) got_pid, strerror(errno));
640        return 1;
641    }
642
643    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
644        ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path);
645        return 0;
646    } else {
647        ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n",
648            apk_path, status);
649        return status;      /* always nonzero */
650    }
651}
652
653int dexopt(const char *apk_path, uid_t uid, int is_public)
654{
655    struct utimbuf ut;
656    struct stat apk_stat, dex_stat;
657    char out_path[PKG_PATH_MAX];
658    char dexopt_flags[PROPERTY_VALUE_MAX];
659    char persist_sys_dalvik_vm_lib[PROPERTY_VALUE_MAX];
660    char *end;
661    int res, zip_fd=-1, out_fd=-1;
662
663    if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
664        return -1;
665    }
666
667    /* platform-specific flags affecting optimization and verification */
668    property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
669    ALOGV("dalvik.vm.dexopt_flags=%s\n", dexopt_flags);
670
671    /* The command to run depend ones the value of persist.sys.dalvik.vm.lib */
672    property_get("persist.sys.dalvik.vm.lib", persist_sys_dalvik_vm_lib, "libdvm.so");
673
674    /* Before anything else: is there a .odex file?  If so, we have
675     * precompiled the apk and there is nothing to do here.
676     */
677    sprintf(out_path, "%s%s", apk_path, ".odex");
678    if (stat(out_path, &dex_stat) == 0) {
679        return 0;
680    }
681
682    if (create_cache_path(out_path, apk_path)) {
683        return -1;
684    }
685
686    memset(&apk_stat, 0, sizeof(apk_stat));
687    stat(apk_path, &apk_stat);
688
689    zip_fd = open(apk_path, O_RDONLY, 0);
690    if (zip_fd < 0) {
691        ALOGE("installd cannot open '%s' for input during dexopt\n", apk_path);
692        return -1;
693    }
694
695    unlink(out_path);
696    out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
697    if (out_fd < 0) {
698        ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
699        goto fail;
700    }
701    if (fchmod(out_fd,
702               S_IRUSR|S_IWUSR|S_IRGRP |
703               (is_public ? S_IROTH : 0)) < 0) {
704        ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
705        goto fail;
706    }
707    if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
708        ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
709        goto fail;
710    }
711
712    ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path);
713
714    pid_t pid;
715    pid = fork();
716    if (pid == 0) {
717        /* child -- drop privileges before continuing */
718        if (setgid(uid) != 0) {
719            ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
720            exit(64);
721        }
722        if (setuid(uid) != 0) {
723            ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
724            exit(65);
725        }
726        // drop capabilities
727        struct __user_cap_header_struct capheader;
728        struct __user_cap_data_struct capdata[2];
729        memset(&capheader, 0, sizeof(capheader));
730        memset(&capdata, 0, sizeof(capdata));
731        capheader.version = _LINUX_CAPABILITY_VERSION_3;
732        if (capset(&capheader, &capdata[0]) < 0) {
733            ALOGE("capset failed: %s\n", strerror(errno));
734            exit(66);
735        }
736        if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
737            ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
738            exit(67);
739        }
740
741        if (strncmp(persist_sys_dalvik_vm_lib, "libdvm", 6) == 0) {
742            run_dexopt(zip_fd, out_fd, apk_path, out_path, dexopt_flags);
743        } else if (strncmp(persist_sys_dalvik_vm_lib, "libart", 6) == 0) {
744            run_dex2oat(zip_fd, out_fd, apk_path, out_path, dexopt_flags);
745        } else {
746            exit(69);   /* Unexpected persist.sys.dalvik.vm.lib value */
747        }
748        exit(68);   /* only get here on exec failure */
749    } else {
750        res = wait_dexopt(pid, apk_path);
751        if (res != 0) {
752            ALOGE("dexopt in='%s' out='%s' res=%d\n", apk_path, out_path, res);
753            goto fail;
754        }
755    }
756
757    ut.actime = apk_stat.st_atime;
758    ut.modtime = apk_stat.st_mtime;
759    utime(out_path, &ut);
760
761    close(out_fd);
762    close(zip_fd);
763    return 0;
764
765fail:
766    if (out_fd >= 0) {
767        close(out_fd);
768        unlink(out_path);
769    }
770    if (zip_fd >= 0) {
771        close(zip_fd);
772    }
773    return -1;
774}
775
776void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
777        struct stat* statbuf)
778{
779    while (path[basepos] != 0) {
780        if (path[basepos] == '/') {
781            path[basepos] = 0;
782            if (lstat(path, statbuf) < 0) {
783                ALOGV("Making directory: %s\n", path);
784                if (mkdir(path, mode) == 0) {
785                    chown(path, uid, gid);
786                } else {
787                    ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
788                }
789            }
790            path[basepos] = '/';
791            basepos++;
792        }
793        basepos++;
794    }
795}
796
797int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
798        int dstuid, int dstgid, struct stat* statbuf)
799{
800    DIR *d;
801    struct dirent *de;
802    int res;
803
804    int srcend = strlen(srcpath);
805    int dstend = strlen(dstpath);
806
807    if (lstat(srcpath, statbuf) < 0) {
808        ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
809        return 1;
810    }
811
812    if ((statbuf->st_mode&S_IFDIR) == 0) {
813        mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
814                dstuid, dstgid, statbuf);
815        ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
816        if (rename(srcpath, dstpath) >= 0) {
817            if (chown(dstpath, dstuid, dstgid) < 0) {
818                ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
819                unlink(dstpath);
820                return 1;
821            }
822        } else {
823            ALOGW("Unable to rename %s to %s: %s\n",
824                srcpath, dstpath, strerror(errno));
825            return 1;
826        }
827        return 0;
828    }
829
830    d = opendir(srcpath);
831    if (d == NULL) {
832        ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
833        return 1;
834    }
835
836    res = 0;
837
838    while ((de = readdir(d))) {
839        const char *name = de->d_name;
840            /* always skip "." and ".." */
841        if (name[0] == '.') {
842            if (name[1] == 0) continue;
843            if ((name[1] == '.') && (name[2] == 0)) continue;
844        }
845
846        if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
847            ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
848            continue;
849        }
850
851        if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
852            ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
853            continue;
854        }
855
856        srcpath[srcend] = dstpath[dstend] = '/';
857        strcpy(srcpath+srcend+1, name);
858        strcpy(dstpath+dstend+1, name);
859
860        if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
861            res = 1;
862        }
863
864        // Note: we will be leaving empty directories behind in srcpath,
865        // but that is okay, the package manager will be erasing all of the
866        // data associated with .apks that disappear.
867
868        srcpath[srcend] = dstpath[dstend] = 0;
869    }
870
871    closedir(d);
872    return res;
873}
874
875int movefiles()
876{
877    DIR *d;
878    int dfd, subfd;
879    struct dirent *de;
880    struct stat s;
881    char buf[PKG_PATH_MAX+1];
882    int bufp, bufe, bufi, readlen;
883
884    char srcpkg[PKG_NAME_MAX];
885    char dstpkg[PKG_NAME_MAX];
886    char srcpath[PKG_PATH_MAX];
887    char dstpath[PKG_PATH_MAX];
888    int dstuid=-1, dstgid=-1;
889    int hasspace;
890
891    d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
892    if (d == NULL) {
893        goto done;
894    }
895    dfd = dirfd(d);
896
897        /* Iterate through all files in the directory, executing the
898         * file movements requested there-in.
899         */
900    while ((de = readdir(d))) {
901        const char *name = de->d_name;
902
903        if (de->d_type == DT_DIR) {
904            continue;
905        } else {
906            subfd = openat(dfd, name, O_RDONLY);
907            if (subfd < 0) {
908                ALOGW("Unable to open update commands at %s%s\n",
909                        UPDATE_COMMANDS_DIR_PREFIX, name);
910                continue;
911            }
912
913            bufp = 0;
914            bufe = 0;
915            buf[PKG_PATH_MAX] = 0;
916            srcpkg[0] = dstpkg[0] = 0;
917            while (1) {
918                bufi = bufp;
919                while (bufi < bufe && buf[bufi] != '\n') {
920                    bufi++;
921                }
922                if (bufi < bufe) {
923                    buf[bufi] = 0;
924                    ALOGV("Processing line: %s\n", buf+bufp);
925                    hasspace = 0;
926                    while (bufp < bufi && isspace(buf[bufp])) {
927                        hasspace = 1;
928                        bufp++;
929                    }
930                    if (buf[bufp] == '#' || bufp == bufi) {
931                        // skip comments and empty lines.
932                    } else if (hasspace) {
933                        if (dstpkg[0] == 0) {
934                            ALOGW("Path before package line in %s%s: %s\n",
935                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
936                        } else if (srcpkg[0] == 0) {
937                            // Skip -- source package no longer exists.
938                        } else {
939                            ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
940                            if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
941                                    !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
942                                movefileordir(srcpath, dstpath,
943                                        strlen(dstpath)-strlen(buf+bufp),
944                                        dstuid, dstgid, &s);
945                            }
946                        }
947                    } else {
948                        char* div = strchr(buf+bufp, ':');
949                        if (div == NULL) {
950                            ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
951                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
952                        } else {
953                            *div = 0;
954                            div++;
955                            if (strlen(buf+bufp) < PKG_NAME_MAX) {
956                                strcpy(dstpkg, buf+bufp);
957                            } else {
958                                srcpkg[0] = dstpkg[0] = 0;
959                                ALOGW("Package name too long in %s%s: %s\n",
960                                        UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
961                            }
962                            if (strlen(div) < PKG_NAME_MAX) {
963                                strcpy(srcpkg, div);
964                            } else {
965                                srcpkg[0] = dstpkg[0] = 0;
966                                ALOGW("Package name too long in %s%s: %s\n",
967                                        UPDATE_COMMANDS_DIR_PREFIX, name, div);
968                            }
969                            if (srcpkg[0] != 0) {
970                                if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
971                                    if (lstat(srcpath, &s) < 0) {
972                                        // Package no longer exists -- skip.
973                                        srcpkg[0] = 0;
974                                    }
975                                } else {
976                                    srcpkg[0] = 0;
977                                    ALOGW("Can't create path %s in %s%s\n",
978                                            div, UPDATE_COMMANDS_DIR_PREFIX, name);
979                                }
980                                if (srcpkg[0] != 0) {
981                                    if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
982                                        if (lstat(dstpath, &s) == 0) {
983                                            dstuid = s.st_uid;
984                                            dstgid = s.st_gid;
985                                        } else {
986                                            // Destination package doesn't
987                                            // exist...  due to original-package,
988                                            // this is normal, so don't be
989                                            // noisy about it.
990                                            srcpkg[0] = 0;
991                                        }
992                                    } else {
993                                        srcpkg[0] = 0;
994                                        ALOGW("Can't create path %s in %s%s\n",
995                                                div, UPDATE_COMMANDS_DIR_PREFIX, name);
996                                    }
997                                }
998                                ALOGV("Transfering from %s to %s: uid=%d\n",
999                                    srcpkg, dstpkg, dstuid);
1000                            }
1001                        }
1002                    }
1003                    bufp = bufi+1;
1004                } else {
1005                    if (bufp == 0) {
1006                        if (bufp < bufe) {
1007                            ALOGW("Line too long in %s%s, skipping: %s\n",
1008                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf);
1009                        }
1010                    } else if (bufp < bufe) {
1011                        memcpy(buf, buf+bufp, bufe-bufp);
1012                        bufe -= bufp;
1013                        bufp = 0;
1014                    }
1015                    readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
1016                    if (readlen < 0) {
1017                        ALOGW("Failure reading update commands in %s%s: %s\n",
1018                                UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
1019                        break;
1020                    } else if (readlen == 0) {
1021                        break;
1022                    }
1023                    bufe += readlen;
1024                    buf[bufe] = 0;
1025                    ALOGV("Read buf: %s\n", buf);
1026                }
1027            }
1028            close(subfd);
1029        }
1030    }
1031    closedir(d);
1032done:
1033    return 0;
1034}
1035
1036int linklib(const char* pkgname, const char* asecLibDir, int userId)
1037{
1038    char pkgdir[PKG_PATH_MAX];
1039    char libsymlink[PKG_PATH_MAX];
1040    struct stat s, libStat;
1041    int rc = 0;
1042
1043    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) {
1044        ALOGE("cannot create package path\n");
1045        return -1;
1046    }
1047    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) {
1048        ALOGE("cannot create package lib symlink origin path\n");
1049        return -1;
1050    }
1051
1052    if (stat(pkgdir, &s) < 0) return -1;
1053
1054    if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
1055        ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
1056        return -1;
1057    }
1058
1059    if (chmod(pkgdir, 0700) < 0) {
1060        ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1061        rc = -1;
1062        goto out;
1063    }
1064
1065    if (lstat(libsymlink, &libStat) < 0) {
1066        if (errno != ENOENT) {
1067            ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1068            rc = -1;
1069            goto out;
1070        }
1071    } else {
1072        if (S_ISDIR(libStat.st_mode)) {
1073            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
1074                rc = -1;
1075                goto out;
1076            }
1077        } else if (S_ISLNK(libStat.st_mode)) {
1078            if (unlink(libsymlink) < 0) {
1079                ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
1080                rc = -1;
1081                goto out;
1082            }
1083        }
1084    }
1085
1086    if (symlink(asecLibDir, libsymlink) < 0) {
1087        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
1088                strerror(errno));
1089        rc = -errno;
1090        goto out;
1091    }
1092
1093out:
1094    if (chmod(pkgdir, s.st_mode) < 0) {
1095        ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1096        rc = -errno;
1097    }
1098
1099    if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1100        ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
1101        return -errno;
1102    }
1103
1104    return rc;
1105}
1106