commands.c revision 9157d3f3b70f5225e06b0a478f2d3c5ce3d923b2 
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 <linux/capability.h>
18#include "installd.h"
19#include <diskusage/dirsize.h>
20
21#ifdef HAVE_SELINUX
22#include <selinux/android.h>
23#endif
24
25/* Directory records that are used in execution of commands. */
26dir_rec_t android_data_dir;
27dir_rec_t android_asec_dir;
28dir_rec_t android_app_dir;
29dir_rec_t android_app_private_dir;
30dir_rec_t android_app_lib_dir;
31dir_rec_t android_media_dir;
32dir_rec_array_t android_system_dirs;
33
34int install(const char *pkgname, uid_t uid, gid_t gid)
35{
36    char pkgdir[PKG_PATH_MAX];
37    char libsymlink[PKG_PATH_MAX];
38    char applibdir[PKG_PATH_MAX];
39    struct stat libStat;
40
41    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
42        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
43        return -1;
44    }
45
46    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
47        ALOGE("cannot create package path\n");
48        return -1;
49    }
50
51    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
52        ALOGE("cannot create package lib symlink origin path\n");
53        return -1;
54    }
55
56    if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
57        ALOGE("cannot create package lib symlink dest path\n");
58        return -1;
59    }
60
61    if (mkdir(pkgdir, 0751) < 0) {
62        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
63        return -1;
64    }
65    if (chmod(pkgdir, 0751) < 0) {
66        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
67        unlink(pkgdir);
68        return -1;
69    }
70
71    if (lstat(libsymlink, &libStat) < 0) {
72        if (errno != ENOENT) {
73            ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
74            return -1;
75        }
76    } else {
77        if (S_ISDIR(libStat.st_mode)) {
78            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
79                ALOGE("couldn't delete lib directory during install for: %s", libsymlink);
80                return -1;
81            }
82        } else if (S_ISLNK(libStat.st_mode)) {
83            if (unlink(libsymlink) < 0) {
84                ALOGE("couldn't unlink lib directory during install for: %s", libsymlink);
85                return -1;
86            }
87        }
88    }
89
90    if (symlink(applibdir, libsymlink) < 0) {
91        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
92                strerror(errno));
93        unlink(pkgdir);
94        return -1;
95    }
96
97#ifdef HAVE_SELINUX
98    if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
99        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
100        unlink(libsymlink);
101        unlink(pkgdir);
102        return -1;
103    }
104#endif
105
106    if (chown(pkgdir, uid, gid) < 0) {
107        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
108        unlink(libsymlink);
109        unlink(pkgdir);
110        return -1;
111    }
112
113    return 0;
114}
115
116int uninstall(const char *pkgname, uid_t persona)
117{
118    char pkgdir[PKG_PATH_MAX];
119
120    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
121        return -1;
122
123    /* delete contents AND directory, no exceptions */
124    return delete_dir_contents(pkgdir, 1, NULL);
125}
126
127int renamepkg(const char *oldpkgname, const char *newpkgname)
128{
129    char oldpkgdir[PKG_PATH_MAX];
130    char newpkgdir[PKG_PATH_MAX];
131
132    if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
133        return -1;
134    if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
135        return -1;
136
137    if (rename(oldpkgdir, newpkgdir) < 0) {
138        ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
139        return -errno;
140    }
141    return 0;
142}
143
144int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
145{
146    char pkgdir[PKG_PATH_MAX];
147    struct stat s;
148    int rc = 0;
149
150    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
151        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
152        return -1;
153    }
154
155    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
156        ALOGE("cannot create package path\n");
157        return -1;
158    }
159
160    if (stat(pkgdir, &s) < 0) return -1;
161
162    if (s.st_uid != 0 || s.st_gid != 0) {
163        ALOGE("fixing uid of non-root pkg: %s %lu %lu\n", pkgdir, s.st_uid, s.st_gid);
164        return -1;
165    }
166
167    if (chmod(pkgdir, 0751) < 0) {
168        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
169        unlink(pkgdir);
170        return -errno;
171    }
172    if (chown(pkgdir, uid, gid) < 0) {
173        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
174        unlink(pkgdir);
175        return -errno;
176    }
177
178    return 0;
179}
180
181int delete_user_data(const char *pkgname, uid_t persona)
182{
183    char pkgdir[PKG_PATH_MAX];
184
185    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
186        return -1;
187
188    /* delete contents, excluding "lib", but not the directory itself */
189    return delete_dir_contents(pkgdir, 0, "lib");
190}
191
192int make_user_data(const char *pkgname, uid_t uid, uid_t persona)
193{
194    char pkgdir[PKG_PATH_MAX];
195    char applibdir[PKG_PATH_MAX];
196    char libsymlink[PKG_PATH_MAX];
197    struct stat libStat;
198
199    // Create the data dir for the package
200    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) {
201        return -1;
202    }
203    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, persona)) {
204        ALOGE("cannot create package lib symlink origin path\n");
205        return -1;
206    }
207    if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
208        ALOGE("cannot create package lib symlink dest path\n");
209        return -1;
210    }
211
212    if (mkdir(pkgdir, 0751) < 0) {
213        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
214        return -errno;
215    }
216    if (chmod(pkgdir, 0751) < 0) {
217        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
218        unlink(pkgdir);
219        return -errno;
220    }
221
222    if (lstat(libsymlink, &libStat) < 0) {
223        if (errno != ENOENT) {
224            ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno));
225            unlink(pkgdir);
226            return -1;
227        }
228    } else {
229        if (S_ISDIR(libStat.st_mode)) {
230            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
231                ALOGE("couldn't delete lib directory during install for non-primary: %s",
232                        libsymlink);
233                unlink(pkgdir);
234                return -1;
235            }
236        } else if (S_ISLNK(libStat.st_mode)) {
237            if (unlink(libsymlink) < 0) {
238                ALOGE("couldn't unlink lib directory during install for non-primary: %s",
239                        libsymlink);
240                unlink(pkgdir);
241                return -1;
242            }
243        }
244    }
245
246    if (symlink(applibdir, libsymlink) < 0) {
247        ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink,
248                applibdir, strerror(errno));
249        unlink(pkgdir);
250        return -1;
251    }
252
253    if (chown(pkgdir, uid, uid) < 0) {
254        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
255        unlink(libsymlink);
256        unlink(pkgdir);
257        return -errno;
258    }
259
260#ifdef HAVE_SELINUX
261    if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
262        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
263        unlink(libsymlink);
264        unlink(pkgdir);
265        return -errno;
266    }
267#endif
268
269    return 0;
270}
271
272int delete_persona(uid_t persona)
273{
274    char data_path[PKG_PATH_MAX];
275    if (create_persona_path(data_path, persona)) {
276        return -1;
277    }
278    if (delete_dir_contents(data_path, 1, NULL)) {
279        return -1;
280    }
281
282    char media_path[PATH_MAX];
283    if (create_persona_media_path(media_path, (userid_t) persona) == -1) {
284        return -1;
285    }
286    if (delete_dir_contents(media_path, 1, NULL) == -1) {
287        return -1;
288    }
289
290    return 0;
291}
292
293int clone_persona_data(uid_t src_persona, uid_t target_persona, int copy)
294{
295    char src_data_dir[PKG_PATH_MAX];
296    char pkg_path[PKG_PATH_MAX];
297    DIR *d;
298    struct dirent *de;
299    struct stat s;
300    uid_t uid;
301
302    if (create_persona_path(src_data_dir, src_persona)) {
303        return -1;
304    }
305
306    d = opendir(src_data_dir);
307    if (d != NULL) {
308        while ((de = readdir(d))) {
309            const char *name = de->d_name;
310
311            if (de->d_type == DT_DIR) {
312                int subfd;
313                    /* always skip "." and ".." */
314                if (name[0] == '.') {
315                    if (name[1] == 0) continue;
316                    if ((name[1] == '.') && (name[2] == 0)) continue;
317                }
318                /* Create the full path to the package's data dir */
319                create_pkg_path(pkg_path, name, PKG_DIR_POSTFIX, src_persona);
320                /* Get the file stat */
321                if (stat(pkg_path, &s) < 0) continue;
322                /* Get the uid of the package */
323                ALOGI("Adding datadir for uid = %lu\n", s.st_uid);
324                uid = (uid_t) s.st_uid % PER_USER_RANGE;
325                /* Create the directory for the target */
326                make_user_data(name, uid + target_persona * PER_USER_RANGE,
327                               target_persona);
328            }
329        }
330        closedir(d);
331    }
332
333    if (ensure_media_user_dirs((userid_t) target_persona) == -1) {
334        return -1;
335    }
336
337    return 0;
338}
339
340int delete_cache(const char *pkgname, uid_t persona)
341{
342    char cachedir[PKG_PATH_MAX];
343
344    if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, persona))
345        return -1;
346
347        /* delete contents, not the directory, no exceptions */
348    return delete_dir_contents(cachedir, 0, 0);
349}
350
351/* Try to ensure free_size bytes of storage are available.
352 * Returns 0 on success.
353 * This is rather simple-minded because doing a full LRU would
354 * be potentially memory-intensive, and without atime it would
355 * also require that apps constantly modify file metadata even
356 * when just reading from the cache, which is pretty awful.
357 */
358int free_cache(int64_t free_size)
359{
360    cache_t* cache;
361    int64_t avail;
362    DIR *d;
363    struct dirent *de;
364    char tmpdir[PATH_MAX];
365    char *dirpos;
366
367    avail = data_disk_free();
368    if (avail < 0) return -1;
369
370    ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
371    if (avail >= free_size) return 0;
372
373    cache = start_cache_collection();
374
375    // Collect cache files for primary user.
376    if (create_persona_path(tmpdir, 0) == 0) {
377        //ALOGI("adding cache files from %s\n", tmpdir);
378        add_cache_files(cache, tmpdir, "cache");
379    }
380
381    // Search for other users and add any cache files from them.
382    snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
383            SECONDARY_USER_PREFIX);
384    dirpos = tmpdir + strlen(tmpdir);
385    d = opendir(tmpdir);
386    if (d != NULL) {
387        while ((de = readdir(d))) {
388            if (de->d_type == DT_DIR) {
389                const char *name = de->d_name;
390                    /* always skip "." and ".." */
391                if (name[0] == '.') {
392                    if (name[1] == 0) continue;
393                    if ((name[1] == '.') && (name[2] == 0)) continue;
394                }
395                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
396                    strcpy(dirpos, name);
397                    //ALOGI("adding cache files from %s\n", tmpdir);
398                    add_cache_files(cache, tmpdir, "cache");
399                } else {
400                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
401                }
402            }
403        }
404        closedir(d);
405    }
406
407    // Collect cache files on external storage for all users (if it is mounted as part
408    // of the internal storage).
409    strcpy(tmpdir, android_media_dir.path);
410    dirpos = tmpdir + strlen(tmpdir);
411    d = opendir(tmpdir);
412    if (d != NULL) {
413        while ((de = readdir(d))) {
414            if (de->d_type == DT_DIR) {
415                const char *name = de->d_name;
416                    /* skip any dir that doesn't start with a number, so not a user */
417                if (name[0] < '0' || name[0] > '9') {
418                    continue;
419                }
420                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
421                    strcpy(dirpos, name);
422                    if (lookup_media_dir(tmpdir, "Android") == 0
423                            && lookup_media_dir(tmpdir, "data") == 0) {
424                        //ALOGI("adding cache files from %s\n", tmpdir);
425                        add_cache_files(cache, tmpdir, "cache");
426                    }
427                } else {
428                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
429                }
430            }
431        }
432        closedir(d);
433    }
434
435    clear_cache_files(cache, free_size);
436    finish_cache_collection(cache);
437
438    return data_disk_free() >= free_size ? 0 : -1;
439}
440
441int move_dex(const char *src, const char *dst)
442{
443    char src_dex[PKG_PATH_MAX];
444    char dst_dex[PKG_PATH_MAX];
445
446    if (validate_apk_path(src)) return -1;
447    if (validate_apk_path(dst)) return -1;
448
449    if (create_cache_path(src_dex, src)) return -1;
450    if (create_cache_path(dst_dex, dst)) return -1;
451
452    ALOGV("move %s -> %s\n", src_dex, dst_dex);
453    if (rename(src_dex, dst_dex) < 0) {
454        ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
455        return -1;
456    } else {
457        return 0;
458    }
459}
460
461int rm_dex(const char *path)
462{
463    char dex_path[PKG_PATH_MAX];
464
465    if (validate_apk_path(path)) return -1;
466    if (create_cache_path(dex_path, path)) return -1;
467
468    ALOGV("unlink %s\n", dex_path);
469    if (unlink(dex_path) < 0) {
470        ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
471        return -1;
472    } else {
473        return 0;
474    }
475}
476
477int get_size(const char *pkgname, int persona, const char *apkpath,
478             const char *fwdlock_apkpath, const char *asecpath,
479             int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize,
480             int64_t* _asecsize)
481{
482    DIR *d;
483    int dfd;
484    struct dirent *de;
485    struct stat s;
486    char path[PKG_PATH_MAX];
487
488    int64_t codesize = 0;
489    int64_t datasize = 0;
490    int64_t cachesize = 0;
491    int64_t asecsize = 0;
492
493        /* count the source apk as code -- but only if it's not
494         * on the /system partition and its not on the sdcard.
495         */
496    if (validate_system_app_path(apkpath) &&
497            strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
498        if (stat(apkpath, &s) == 0) {
499            codesize += stat_size(&s);
500        }
501    }
502        /* count the forward locked apk as code if it is given
503         */
504    if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
505        if (stat(fwdlock_apkpath, &s) == 0) {
506            codesize += stat_size(&s);
507        }
508    }
509        /* count the cached dexfile as code */
510    if (!create_cache_path(path, apkpath)) {
511        if (stat(path, &s) == 0) {
512            codesize += stat_size(&s);
513        }
514    }
515
516        /* add in size of any libraries */
517    if (!create_pkg_path_in_dir(path, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
518        d = opendir(path);
519        if (d != NULL) {
520            dfd = dirfd(d);
521            codesize += calculate_dir_size(dfd);
522            closedir(d);
523        }
524    }
525
526        /* compute asec size if it is given
527         */
528    if (asecpath != NULL && asecpath[0] != '!') {
529        if (stat(asecpath, &s) == 0) {
530            asecsize += stat_size(&s);
531        }
532    }
533
534    if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, persona)) {
535        goto done;
536    }
537
538    d = opendir(path);
539    if (d == NULL) {
540        goto done;
541    }
542    dfd = dirfd(d);
543
544    /* most stuff in the pkgdir is data, except for the "cache"
545     * directory and below, which is cache, and the "lib" directory
546     * and below, which is code...
547     */
548    while ((de = readdir(d))) {
549        const char *name = de->d_name;
550
551        if (de->d_type == DT_DIR) {
552            int subfd;
553            int64_t statsize = 0;
554            int64_t dirsize = 0;
555                /* always skip "." and ".." */
556            if (name[0] == '.') {
557                if (name[1] == 0) continue;
558                if ((name[1] == '.') && (name[2] == 0)) continue;
559            }
560            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
561                statsize = stat_size(&s);
562            }
563            subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
564            if (subfd >= 0) {
565                dirsize = calculate_dir_size(subfd);
566            }
567            if(!strcmp(name,"lib")) {
568                codesize += dirsize + statsize;
569            } else if(!strcmp(name,"cache")) {
570                cachesize += dirsize + statsize;
571            } else {
572                datasize += dirsize + statsize;
573            }
574        } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
575            // This is the symbolic link to the application's library
576            // code.  We'll count this as code instead of data, since
577            // it is not something that the app creates.
578            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
579                codesize += stat_size(&s);
580            }
581        } else {
582            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
583                datasize += stat_size(&s);
584            }
585        }
586    }
587    closedir(d);
588done:
589    *_codesize = codesize;
590    *_datasize = datasize;
591    *_cachesize = cachesize;
592    *_asecsize = asecsize;
593    return 0;
594}
595
596
597/* a simpler version of dexOptGenerateCacheFileName() */
598int create_cache_path(char path[PKG_PATH_MAX], const char *src)
599{
600    char *tmp;
601    int srclen;
602    int dstlen;
603
604    srclen = strlen(src);
605
606        /* demand that we are an absolute path */
607    if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
608        return -1;
609    }
610
611    if (srclen > PKG_PATH_MAX) {        // XXX: PKG_NAME_MAX?
612        return -1;
613    }
614
615    dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
616        strlen(DALVIK_CACHE_POSTFIX) + 1;
617
618    if (dstlen > PKG_PATH_MAX) {
619        return -1;
620    }
621
622    sprintf(path,"%s%s%s",
623            DALVIK_CACHE_PREFIX,
624            src + 1, /* skip the leading / */
625            DALVIK_CACHE_POSTFIX);
626
627    for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) {
628        if (*tmp == '/') {
629            *tmp = '@';
630        }
631    }
632
633    return 0;
634}
635
636static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
637    const char* dexopt_flags)
638{
639    static const char* DEX_OPT_BIN = "/system/bin/dexopt";
640    static const int MAX_INT_LEN = 12;      // '-'+10dig+'\0' -OR- 0x+8dig
641    char zip_num[MAX_INT_LEN];
642    char odex_num[MAX_INT_LEN];
643
644    sprintf(zip_num, "%d", zip_fd);
645    sprintf(odex_num, "%d", odex_fd);
646
647    execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
648        dexopt_flags, (char*) NULL);
649    ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
650}
651
652static int wait_dexopt(pid_t pid, const char* apk_path)
653{
654    int status;
655    pid_t got_pid;
656
657    /*
658     * Wait for the optimization process to finish.
659     */
660    while (1) {
661        got_pid = waitpid(pid, &status, 0);
662        if (got_pid == -1 && errno == EINTR) {
663            printf("waitpid interrupted, retrying\n");
664        } else {
665            break;
666        }
667    }
668    if (got_pid != pid) {
669        ALOGW("waitpid failed: wanted %d, got %d: %s\n",
670            (int) pid, (int) got_pid, strerror(errno));
671        return 1;
672    }
673
674    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
675        ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path);
676        return 0;
677    } else {
678        ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n",
679            apk_path, status);
680        return status;      /* always nonzero */
681    }
682}
683
684int dexopt(const char *apk_path, uid_t uid, int is_public)
685{
686    struct utimbuf ut;
687    struct stat apk_stat, dex_stat;
688    char dex_path[PKG_PATH_MAX];
689    char dexopt_flags[PROPERTY_VALUE_MAX];
690    char *end;
691    int res, zip_fd=-1, odex_fd=-1;
692
693        /* Before anything else: is there a .odex file?  If so, we have
694         * pre-optimized the apk and there is nothing to do here.
695         */
696    if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
697        return -1;
698    }
699
700    /* platform-specific flags affecting optimization and verification */
701    property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
702
703    strcpy(dex_path, apk_path);
704    end = strrchr(dex_path, '.');
705    if (end != NULL) {
706        strcpy(end, ".odex");
707        if (stat(dex_path, &dex_stat) == 0) {
708            return 0;
709        }
710    }
711
712    if (create_cache_path(dex_path, apk_path)) {
713        return -1;
714    }
715
716    memset(&apk_stat, 0, sizeof(apk_stat));
717    stat(apk_path, &apk_stat);
718
719    zip_fd = open(apk_path, O_RDONLY, 0);
720    if (zip_fd < 0) {
721        ALOGE("dexopt cannot open '%s' for input\n", apk_path);
722        return -1;
723    }
724
725    unlink(dex_path);
726    odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644);
727    if (odex_fd < 0) {
728        ALOGE("dexopt cannot open '%s' for output\n", dex_path);
729        goto fail;
730    }
731    if (fchmod(odex_fd,
732               S_IRUSR|S_IWUSR|S_IRGRP |
733               (is_public ? S_IROTH : 0)) < 0) {
734        ALOGE("dexopt cannot chmod '%s'\n", dex_path);
735        goto fail;
736    }
737    if (fchown(odex_fd, AID_SYSTEM, uid) < 0) {
738        ALOGE("dexopt cannot chown '%s'\n", dex_path);
739        goto fail;
740    }
741
742    ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path);
743
744    pid_t pid;
745    pid = fork();
746    if (pid == 0) {
747        /* child -- drop privileges before continuing */
748        if (setgid(uid) != 0) {
749            ALOGE("setgid(%d) failed during dexopt\n", uid);
750            exit(64);
751        }
752        if (setuid(uid) != 0) {
753            ALOGE("setuid(%d) during dexopt\n", uid);
754            exit(65);
755        }
756        // drop capabilities
757        struct __user_cap_header_struct capheader;
758        struct __user_cap_data_struct capdata[2];
759        memset(&capheader, 0, sizeof(capheader));
760        memset(&capdata, 0, sizeof(capdata));
761        capheader.version = _LINUX_CAPABILITY_VERSION_3;
762        if (capset(&capheader, &capdata[0]) < 0) {
763            ALOGE("capset failed: %s\n", strerror(errno));
764            exit(66);
765        }
766        if (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) {
767            ALOGE("flock(%s) failed: %s\n", dex_path, strerror(errno));
768            exit(67);
769        }
770
771        run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags);
772        exit(68);   /* only get here on exec failure */
773    } else {
774        res = wait_dexopt(pid, apk_path);
775        if (res != 0) {
776            ALOGE("dexopt failed on '%s' res = %d\n", dex_path, res);
777            goto fail;
778        }
779    }
780
781    ut.actime = apk_stat.st_atime;
782    ut.modtime = apk_stat.st_mtime;
783    utime(dex_path, &ut);
784
785    close(odex_fd);
786    close(zip_fd);
787    return 0;
788
789fail:
790    if (odex_fd >= 0) {
791        close(odex_fd);
792        unlink(dex_path);
793    }
794    if (zip_fd >= 0) {
795        close(zip_fd);
796    }
797    return -1;
798}
799
800void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
801        struct stat* statbuf)
802{
803    while (path[basepos] != 0) {
804        if (path[basepos] == '/') {
805            path[basepos] = 0;
806            if (lstat(path, statbuf) < 0) {
807                ALOGV("Making directory: %s\n", path);
808                if (mkdir(path, mode) == 0) {
809                    chown(path, uid, gid);
810                } else {
811                    ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
812                }
813            }
814            path[basepos] = '/';
815            basepos++;
816        }
817        basepos++;
818    }
819}
820
821int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
822        int dstuid, int dstgid, struct stat* statbuf)
823{
824    DIR *d;
825    struct dirent *de;
826    int res;
827
828    int srcend = strlen(srcpath);
829    int dstend = strlen(dstpath);
830
831    if (lstat(srcpath, statbuf) < 0) {
832        ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
833        return 1;
834    }
835
836    if ((statbuf->st_mode&S_IFDIR) == 0) {
837        mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
838                dstuid, dstgid, statbuf);
839        ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
840        if (rename(srcpath, dstpath) >= 0) {
841            if (chown(dstpath, dstuid, dstgid) < 0) {
842                ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
843                unlink(dstpath);
844                return 1;
845            }
846        } else {
847            ALOGW("Unable to rename %s to %s: %s\n",
848                srcpath, dstpath, strerror(errno));
849            return 1;
850        }
851        return 0;
852    }
853
854    d = opendir(srcpath);
855    if (d == NULL) {
856        ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
857        return 1;
858    }
859
860    res = 0;
861
862    while ((de = readdir(d))) {
863        const char *name = de->d_name;
864            /* always skip "." and ".." */
865        if (name[0] == '.') {
866            if (name[1] == 0) continue;
867            if ((name[1] == '.') && (name[2] == 0)) continue;
868        }
869
870        if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
871            ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
872            continue;
873        }
874
875        if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
876            ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
877            continue;
878        }
879
880        srcpath[srcend] = dstpath[dstend] = '/';
881        strcpy(srcpath+srcend+1, name);
882        strcpy(dstpath+dstend+1, name);
883
884        if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
885            res = 1;
886        }
887
888        // Note: we will be leaving empty directories behind in srcpath,
889        // but that is okay, the package manager will be erasing all of the
890        // data associated with .apks that disappear.
891
892        srcpath[srcend] = dstpath[dstend] = 0;
893    }
894
895    closedir(d);
896    return res;
897}
898
899int movefiles()
900{
901    DIR *d;
902    int dfd, subfd;
903    struct dirent *de;
904    struct stat s;
905    char buf[PKG_PATH_MAX+1];
906    int bufp, bufe, bufi, readlen;
907
908    char srcpkg[PKG_NAME_MAX];
909    char dstpkg[PKG_NAME_MAX];
910    char srcpath[PKG_PATH_MAX];
911    char dstpath[PKG_PATH_MAX];
912    int dstuid=-1, dstgid=-1;
913    int hasspace;
914
915    d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
916    if (d == NULL) {
917        goto done;
918    }
919    dfd = dirfd(d);
920
921        /* Iterate through all files in the directory, executing the
922         * file movements requested there-in.
923         */
924    while ((de = readdir(d))) {
925        const char *name = de->d_name;
926
927        if (de->d_type == DT_DIR) {
928            continue;
929        } else {
930            subfd = openat(dfd, name, O_RDONLY);
931            if (subfd < 0) {
932                ALOGW("Unable to open update commands at %s%s\n",
933                        UPDATE_COMMANDS_DIR_PREFIX, name);
934                continue;
935            }
936
937            bufp = 0;
938            bufe = 0;
939            buf[PKG_PATH_MAX] = 0;
940            srcpkg[0] = dstpkg[0] = 0;
941            while (1) {
942                bufi = bufp;
943                while (bufi < bufe && buf[bufi] != '\n') {
944                    bufi++;
945                }
946                if (bufi < bufe) {
947                    buf[bufi] = 0;
948                    ALOGV("Processing line: %s\n", buf+bufp);
949                    hasspace = 0;
950                    while (bufp < bufi && isspace(buf[bufp])) {
951                        hasspace = 1;
952                        bufp++;
953                    }
954                    if (buf[bufp] == '#' || bufp == bufi) {
955                        // skip comments and empty lines.
956                    } else if (hasspace) {
957                        if (dstpkg[0] == 0) {
958                            ALOGW("Path before package line in %s%s: %s\n",
959                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
960                        } else if (srcpkg[0] == 0) {
961                            // Skip -- source package no longer exists.
962                        } else {
963                            ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
964                            if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
965                                    !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
966                                movefileordir(srcpath, dstpath,
967                                        strlen(dstpath)-strlen(buf+bufp),
968                                        dstuid, dstgid, &s);
969                            }
970                        }
971                    } else {
972                        char* div = strchr(buf+bufp, ':');
973                        if (div == NULL) {
974                            ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
975                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
976                        } else {
977                            *div = 0;
978                            div++;
979                            if (strlen(buf+bufp) < PKG_NAME_MAX) {
980                                strcpy(dstpkg, buf+bufp);
981                            } else {
982                                srcpkg[0] = dstpkg[0] = 0;
983                                ALOGW("Package name too long in %s%s: %s\n",
984                                        UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
985                            }
986                            if (strlen(div) < PKG_NAME_MAX) {
987                                strcpy(srcpkg, div);
988                            } else {
989                                srcpkg[0] = dstpkg[0] = 0;
990                                ALOGW("Package name too long in %s%s: %s\n",
991                                        UPDATE_COMMANDS_DIR_PREFIX, name, div);
992                            }
993                            if (srcpkg[0] != 0) {
994                                if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
995                                    if (lstat(srcpath, &s) < 0) {
996                                        // Package no longer exists -- skip.
997                                        srcpkg[0] = 0;
998                                    }
999                                } else {
1000                                    srcpkg[0] = 0;
1001                                    ALOGW("Can't create path %s in %s%s\n",
1002                                            div, UPDATE_COMMANDS_DIR_PREFIX, name);
1003                                }
1004                                if (srcpkg[0] != 0) {
1005                                    if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
1006                                        if (lstat(dstpath, &s) == 0) {
1007                                            dstuid = s.st_uid;
1008                                            dstgid = s.st_gid;
1009                                        } else {
1010                                            // Destination package doesn't
1011                                            // exist...  due to original-package,
1012                                            // this is normal, so don't be
1013                                            // noisy about it.
1014                                            srcpkg[0] = 0;
1015                                        }
1016                                    } else {
1017                                        srcpkg[0] = 0;
1018                                        ALOGW("Can't create path %s in %s%s\n",
1019                                                div, UPDATE_COMMANDS_DIR_PREFIX, name);
1020                                    }
1021                                }
1022                                ALOGV("Transfering from %s to %s: uid=%d\n",
1023                                    srcpkg, dstpkg, dstuid);
1024                            }
1025                        }
1026                    }
1027                    bufp = bufi+1;
1028                } else {
1029                    if (bufp == 0) {
1030                        if (bufp < bufe) {
1031                            ALOGW("Line too long in %s%s, skipping: %s\n",
1032                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf);
1033                        }
1034                    } else if (bufp < bufe) {
1035                        memcpy(buf, buf+bufp, bufe-bufp);
1036                        bufe -= bufp;
1037                        bufp = 0;
1038                    }
1039                    readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
1040                    if (readlen < 0) {
1041                        ALOGW("Failure reading update commands in %s%s: %s\n",
1042                                UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
1043                        break;
1044                    } else if (readlen == 0) {
1045                        break;
1046                    }
1047                    bufe += readlen;
1048                    buf[bufe] = 0;
1049                    ALOGV("Read buf: %s\n", buf);
1050                }
1051            }
1052            close(subfd);
1053        }
1054    }
1055    closedir(d);
1056done:
1057    return 0;
1058}
1059
1060int linklib(const char* pkgname, const char* asecLibDir, int userId)
1061{
1062    char pkgdir[PKG_PATH_MAX];
1063    char libsymlink[PKG_PATH_MAX];
1064    struct stat s, libStat;
1065    int rc = 0;
1066
1067    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) {
1068        ALOGE("cannot create package path\n");
1069        return -1;
1070    }
1071    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) {
1072        ALOGE("cannot create package lib symlink origin path\n");
1073        return -1;
1074    }
1075
1076    if (stat(pkgdir, &s) < 0) return -1;
1077
1078    if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
1079        ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
1080        return -1;
1081    }
1082
1083    if (chmod(pkgdir, 0700) < 0) {
1084        ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1085        rc = -1;
1086        goto out;
1087    }
1088
1089    if (lstat(libsymlink, &libStat) < 0) {
1090        if (errno != ENOENT) {
1091            ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1092            rc = -1;
1093            goto out;
1094        }
1095    } else {
1096        if (S_ISDIR(libStat.st_mode)) {
1097            if (delete_dir_contents(libsymlink, 1, 0) < 0) {
1098                rc = -1;
1099                goto out;
1100            }
1101        } else if (S_ISLNK(libStat.st_mode)) {
1102            if (unlink(libsymlink) < 0) {
1103                ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
1104                rc = -1;
1105                goto out;
1106            }
1107        }
1108    }
1109
1110    if (symlink(asecLibDir, libsymlink) < 0) {
1111        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
1112                strerror(errno));
1113        rc = -errno;
1114        goto out;
1115    }
1116
1117out:
1118    if (chmod(pkgdir, s.st_mode) < 0) {
1119        ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1120        rc = -errno;
1121    }
1122
1123    if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1124        ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
1125        return -errno;
1126    }
1127
1128    return rc;
1129}
1130