commands.c revision f41496f1791d983bf8bbbdf95f72528e59284b39 
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
40    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
41        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
42        return -1;
43    }
44
45    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
46        ALOGE("cannot create package path\n");
47        return -1;
48    }
49
50    if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
51        ALOGE("cannot create package lib symlink origin path\n");
52        return -1;
53    }
54
55    if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
56        ALOGE("cannot create package lib symlink dest path\n");
57        return -1;
58    }
59
60    if (mkdir(pkgdir, 0751) < 0) {
61        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
62        return -1;
63    }
64    if (chmod(pkgdir, 0751) < 0) {
65        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
66        unlink(pkgdir);
67        return -1;
68    }
69
70    if (symlink(applibdir, libsymlink) < 0) {
71        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
72                strerror(errno));
73        unlink(pkgdir);
74        return -1;
75    }
76
77#ifdef HAVE_SELINUX
78    if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
79        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
80        unlink(libsymlink);
81        unlink(pkgdir);
82        return -1;
83    }
84#endif
85
86    if (chown(pkgdir, uid, gid) < 0) {
87        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
88        unlink(libsymlink);
89        unlink(pkgdir);
90        return -1;
91    }
92
93    return 0;
94}
95
96int uninstall(const char *pkgname, uid_t persona)
97{
98    char pkgdir[PKG_PATH_MAX];
99
100    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
101        return -1;
102
103    /* delete contents AND directory, no exceptions */
104    return delete_dir_contents(pkgdir, 1, NULL);
105}
106
107int renamepkg(const char *oldpkgname, const char *newpkgname)
108{
109    char oldpkgdir[PKG_PATH_MAX];
110    char newpkgdir[PKG_PATH_MAX];
111
112    if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
113        return -1;
114    if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
115        return -1;
116
117    if (rename(oldpkgdir, newpkgdir) < 0) {
118        ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
119        return -errno;
120    }
121    return 0;
122}
123
124int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
125{
126    char pkgdir[PKG_PATH_MAX];
127    struct stat s;
128    int rc = 0;
129
130    if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
131        ALOGE("invalid uid/gid: %d %d\n", uid, gid);
132        return -1;
133    }
134
135    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
136        ALOGE("cannot create package path\n");
137        return -1;
138    }
139
140    if (stat(pkgdir, &s) < 0) return -1;
141
142    if (s.st_uid != 0 || s.st_gid != 0) {
143        ALOGE("fixing uid of non-root pkg: %s %d %d\n", pkgdir, s.st_uid, s.st_gid);
144        return -1;
145    }
146
147    if (chmod(pkgdir, 0751) < 0) {
148        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
149        unlink(pkgdir);
150        return -errno;
151    }
152    if (chown(pkgdir, uid, gid) < 0) {
153        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
154        unlink(pkgdir);
155        return -errno;
156    }
157
158    return 0;
159}
160
161int delete_user_data(const char *pkgname, uid_t persona)
162{
163    char pkgdir[PKG_PATH_MAX];
164
165    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
166        return -1;
167
168    /* delete contents, excluding "lib", but not the directory itself */
169    return delete_dir_contents(pkgdir, 0, "lib");
170}
171
172int make_user_data(const char *pkgname, uid_t uid, uid_t persona)
173{
174    char pkgdir[PKG_PATH_MAX];
175
176    // Create the data dir for the package
177    if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) {
178        return -1;
179    }
180    if (mkdir(pkgdir, 0751) < 0) {
181        ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
182        return -errno;
183    }
184    if (chmod(pkgdir, 0751) < 0) {
185        ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
186        unlink(pkgdir);
187        return -errno;
188    }
189    if (chown(pkgdir, uid, uid) < 0) {
190        ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
191        unlink(pkgdir);
192        return -errno;
193    }
194
195#ifdef HAVE_SELINUX
196    if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
197        ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
198        unlink(pkgdir);
199        return -errno;
200    }
201#endif
202
203    return 0;
204}
205
206int delete_persona(uid_t persona)
207{
208    char data_path[PKG_PATH_MAX];
209    if (create_persona_path(data_path, persona)) {
210        return -1;
211    }
212    if (delete_dir_contents(data_path, 1, NULL)) {
213        return -1;
214    }
215
216    char media_path[PATH_MAX];
217    if (create_persona_media_path(media_path, (userid_t) persona) == -1) {
218        return -1;
219    }
220    if (delete_dir_contents(media_path, 1, NULL) == -1) {
221        return -1;
222    }
223
224    return 0;
225}
226
227int clone_persona_data(uid_t src_persona, uid_t target_persona, int copy)
228{
229    char src_data_dir[PKG_PATH_MAX];
230    char pkg_path[PKG_PATH_MAX];
231    DIR *d;
232    struct dirent *de;
233    struct stat s;
234    uid_t uid;
235
236    if (create_persona_path(src_data_dir, src_persona)) {
237        return -1;
238    }
239
240    d = opendir(src_data_dir);
241    if (d != NULL) {
242        while ((de = readdir(d))) {
243            const char *name = de->d_name;
244
245            if (de->d_type == DT_DIR) {
246                int subfd;
247                    /* always skip "." and ".." */
248                if (name[0] == '.') {
249                    if (name[1] == 0) continue;
250                    if ((name[1] == '.') && (name[2] == 0)) continue;
251                }
252                /* Create the full path to the package's data dir */
253                create_pkg_path(pkg_path, name, PKG_DIR_POSTFIX, src_persona);
254                /* Get the file stat */
255                if (stat(pkg_path, &s) < 0) continue;
256                /* Get the uid of the package */
257                ALOGI("Adding datadir for uid = %d\n", s.st_uid);
258                uid = (uid_t) s.st_uid % PER_USER_RANGE;
259                /* Create the directory for the target */
260                make_user_data(name, uid + target_persona * PER_USER_RANGE,
261                               target_persona);
262            }
263        }
264        closedir(d);
265    }
266
267    if (ensure_media_user_dirs((userid_t) target_persona) == -1) {
268        return -1;
269    }
270
271    return 0;
272}
273
274int delete_cache(const char *pkgname)
275{
276    char cachedir[PKG_PATH_MAX];
277
278    if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, 0))
279        return -1;
280
281        /* delete contents, not the directory, no exceptions */
282    return delete_dir_contents(cachedir, 0, 0);
283}
284
285/* Try to ensure free_size bytes of storage are available.
286 * Returns 0 on success.
287 * This is rather simple-minded because doing a full LRU would
288 * be potentially memory-intensive, and without atime it would
289 * also require that apps constantly modify file metadata even
290 * when just reading from the cache, which is pretty awful.
291 */
292int free_cache(int64_t free_size)
293{
294    cache_t* cache;
295    int64_t avail;
296    DIR *d;
297    struct dirent *de;
298    char tmpdir[PATH_MAX];
299    char *dirpos;
300
301    avail = data_disk_free();
302    if (avail < 0) return -1;
303
304    ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
305    if (avail >= free_size) return 0;
306
307    cache = start_cache_collection();
308
309    // Collect cache files for primary user.
310    if (create_persona_path(tmpdir, 0) == 0) {
311        //ALOGI("adding cache files from %s\n", tmpdir);
312        add_cache_files(cache, tmpdir, "cache");
313    }
314
315    // Search for other users and add any cache files from them.
316    snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
317            SECONDARY_USER_PREFIX);
318    dirpos = tmpdir + strlen(tmpdir);
319    d = opendir(tmpdir);
320    if (d != NULL) {
321        while ((de = readdir(d))) {
322            if (de->d_type == DT_DIR) {
323                const char *name = de->d_name;
324                    /* always skip "." and ".." */
325                if (name[0] == '.') {
326                    if (name[1] == 0) continue;
327                    if ((name[1] == '.') && (name[2] == 0)) continue;
328                }
329                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
330                    strcpy(dirpos, name);
331                    //ALOGI("adding cache files from %s\n", tmpdir);
332                    add_cache_files(cache, tmpdir, "cache");
333                } else {
334                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
335                }
336            }
337        }
338        closedir(d);
339    }
340
341    // Collect cache files on external storage for all users (if it is mounted as part
342    // of the internal storage).
343    strcpy(tmpdir, android_media_dir.path);
344    dirpos = tmpdir + strlen(tmpdir);
345    d = opendir(tmpdir);
346    if (d != NULL) {
347        while ((de = readdir(d))) {
348            if (de->d_type == DT_DIR) {
349                const char *name = de->d_name;
350                    /* skip any dir that doesn't start with a number, so not a user */
351                if (name[0] < '0' || name[0] > '9') {
352                    continue;
353                }
354                if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
355                    strcpy(dirpos, name);
356                    if (lookup_media_dir(tmpdir, "Android") == 0
357                            && lookup_media_dir(tmpdir, "data") == 0) {
358                        //ALOGI("adding cache files from %s\n", tmpdir);
359                        add_cache_files(cache, tmpdir, "cache");
360                    }
361                } else {
362                    ALOGW("Path exceeds limit: %s%s", tmpdir, name);
363                }
364            }
365        }
366        closedir(d);
367    }
368
369    clear_cache_files(cache, free_size);
370    finish_cache_collection(cache);
371
372    return data_disk_free() >= free_size ? 0 : -1;
373}
374
375int move_dex(const char *src, const char *dst)
376{
377    char src_dex[PKG_PATH_MAX];
378    char dst_dex[PKG_PATH_MAX];
379
380    if (validate_apk_path(src)) return -1;
381    if (validate_apk_path(dst)) return -1;
382
383    if (create_cache_path(src_dex, src)) return -1;
384    if (create_cache_path(dst_dex, dst)) return -1;
385
386    ALOGV("move %s -> %s\n", src_dex, dst_dex);
387    if (rename(src_dex, dst_dex) < 0) {
388        ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
389        return -1;
390    } else {
391        return 0;
392    }
393}
394
395int rm_dex(const char *path)
396{
397    char dex_path[PKG_PATH_MAX];
398
399    if (validate_apk_path(path)) return -1;
400    if (create_cache_path(dex_path, path)) return -1;
401
402    ALOGV("unlink %s\n", dex_path);
403    if (unlink(dex_path) < 0) {
404        ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
405        return -1;
406    } else {
407        return 0;
408    }
409}
410
411int get_size(const char *pkgname, int persona, const char *apkpath,
412             const char *fwdlock_apkpath, const char *asecpath,
413             int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize,
414             int64_t* _asecsize)
415{
416    DIR *d;
417    int dfd;
418    struct dirent *de;
419    struct stat s;
420    char path[PKG_PATH_MAX];
421
422    int64_t codesize = 0;
423    int64_t datasize = 0;
424    int64_t cachesize = 0;
425    int64_t asecsize = 0;
426
427        /* count the source apk as code -- but only if it's not
428         * on the /system partition and its not on the sdcard.
429         */
430    if (validate_system_app_path(apkpath) &&
431            strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
432        if (stat(apkpath, &s) == 0) {
433            codesize += stat_size(&s);
434        }
435    }
436        /* count the forward locked apk as code if it is given
437         */
438    if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
439        if (stat(fwdlock_apkpath, &s) == 0) {
440            codesize += stat_size(&s);
441        }
442    }
443        /* count the cached dexfile as code */
444    if (!create_cache_path(path, apkpath)) {
445        if (stat(path, &s) == 0) {
446            codesize += stat_size(&s);
447        }
448    }
449
450        /* add in size of any libraries */
451    if (!create_pkg_path_in_dir(path, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
452        d = opendir(path);
453        if (d != NULL) {
454            dfd = dirfd(d);
455            codesize += calculate_dir_size(dfd);
456            closedir(d);
457        }
458    }
459
460        /* compute asec size if it is given
461         */
462    if (asecpath != NULL && asecpath[0] != '!') {
463        if (stat(asecpath, &s) == 0) {
464            asecsize += stat_size(&s);
465        }
466    }
467
468    if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, persona)) {
469        goto done;
470    }
471
472    d = opendir(path);
473    if (d == NULL) {
474        goto done;
475    }
476    dfd = dirfd(d);
477
478    /* most stuff in the pkgdir is data, except for the "cache"
479     * directory and below, which is cache, and the "lib" directory
480     * and below, which is code...
481     */
482    while ((de = readdir(d))) {
483        const char *name = de->d_name;
484
485        if (de->d_type == DT_DIR) {
486            int subfd;
487            int64_t statsize = 0;
488            int64_t dirsize = 0;
489                /* always skip "." and ".." */
490            if (name[0] == '.') {
491                if (name[1] == 0) continue;
492                if ((name[1] == '.') && (name[2] == 0)) continue;
493            }
494            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
495                statsize = stat_size(&s);
496            }
497            subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
498            if (subfd >= 0) {
499                dirsize = calculate_dir_size(subfd);
500            }
501            if(!strcmp(name,"lib")) {
502                codesize += dirsize + statsize;
503            } else if(!strcmp(name,"cache")) {
504                cachesize += dirsize + statsize;
505            } else {
506                datasize += dirsize + statsize;
507            }
508        } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
509            // This is the symbolic link to the application's library
510            // code.  We'll count this as code instead of data, since
511            // it is not something that the app creates.
512            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
513                codesize += stat_size(&s);
514            }
515        } else {
516            if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
517                datasize += stat_size(&s);
518            }
519        }
520    }
521    closedir(d);
522done:
523    *_codesize = codesize;
524    *_datasize = datasize;
525    *_cachesize = cachesize;
526    *_asecsize = asecsize;
527    return 0;
528}
529
530
531/* a simpler version of dexOptGenerateCacheFileName() */
532int create_cache_path(char path[PKG_PATH_MAX], const char *src)
533{
534    char *tmp;
535    int srclen;
536    int dstlen;
537
538    srclen = strlen(src);
539
540        /* demand that we are an absolute path */
541    if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
542        return -1;
543    }
544
545    if (srclen > PKG_PATH_MAX) {        // XXX: PKG_NAME_MAX?
546        return -1;
547    }
548
549    dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
550        strlen(DALVIK_CACHE_POSTFIX) + 1;
551
552    if (dstlen > PKG_PATH_MAX) {
553        return -1;
554    }
555
556    sprintf(path,"%s%s%s",
557            DALVIK_CACHE_PREFIX,
558            src + 1, /* skip the leading / */
559            DALVIK_CACHE_POSTFIX);
560
561    for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) {
562        if (*tmp == '/') {
563            *tmp = '@';
564        }
565    }
566
567    return 0;
568}
569
570static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
571    const char* dexopt_flags)
572{
573    static const char* DEX_OPT_BIN = "/system/bin/dexopt";
574    static const int MAX_INT_LEN = 12;      // '-'+10dig+'\0' -OR- 0x+8dig
575    char zip_num[MAX_INT_LEN];
576    char odex_num[MAX_INT_LEN];
577
578    sprintf(zip_num, "%d", zip_fd);
579    sprintf(odex_num, "%d", odex_fd);
580
581    execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
582        dexopt_flags, (char*) NULL);
583    ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
584}
585
586static int wait_dexopt(pid_t pid, const char* apk_path)
587{
588    int status;
589    pid_t got_pid;
590
591    /*
592     * Wait for the optimization process to finish.
593     */
594    while (1) {
595        got_pid = waitpid(pid, &status, 0);
596        if (got_pid == -1 && errno == EINTR) {
597            printf("waitpid interrupted, retrying\n");
598        } else {
599            break;
600        }
601    }
602    if (got_pid != pid) {
603        ALOGW("waitpid failed: wanted %d, got %d: %s\n",
604            (int) pid, (int) got_pid, strerror(errno));
605        return 1;
606    }
607
608    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
609        ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path);
610        return 0;
611    } else {
612        ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n",
613            apk_path, status);
614        return status;      /* always nonzero */
615    }
616}
617
618int dexopt(const char *apk_path, uid_t uid, int is_public)
619{
620    struct utimbuf ut;
621    struct stat apk_stat, dex_stat;
622    char dex_path[PKG_PATH_MAX];
623    char dexopt_flags[PROPERTY_VALUE_MAX];
624    char *end;
625    int res, zip_fd=-1, odex_fd=-1;
626
627        /* Before anything else: is there a .odex file?  If so, we have
628         * pre-optimized the apk and there is nothing to do here.
629         */
630    if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
631        return -1;
632    }
633
634    /* platform-specific flags affecting optimization and verification */
635    property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
636
637    strcpy(dex_path, apk_path);
638    end = strrchr(dex_path, '.');
639    if (end != NULL) {
640        strcpy(end, ".odex");
641        if (stat(dex_path, &dex_stat) == 0) {
642            return 0;
643        }
644    }
645
646    if (create_cache_path(dex_path, apk_path)) {
647        return -1;
648    }
649
650    memset(&apk_stat, 0, sizeof(apk_stat));
651    stat(apk_path, &apk_stat);
652
653    zip_fd = open(apk_path, O_RDONLY, 0);
654    if (zip_fd < 0) {
655        ALOGE("dexopt cannot open '%s' for input\n", apk_path);
656        return -1;
657    }
658
659    unlink(dex_path);
660    odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644);
661    if (odex_fd < 0) {
662        ALOGE("dexopt cannot open '%s' for output\n", dex_path);
663        goto fail;
664    }
665    if (fchmod(odex_fd,
666               S_IRUSR|S_IWUSR|S_IRGRP |
667               (is_public ? S_IROTH : 0)) < 0) {
668        ALOGE("dexopt cannot chmod '%s'\n", dex_path);
669        goto fail;
670    }
671    if (fchown(odex_fd, AID_SYSTEM, uid) < 0) {
672        ALOGE("dexopt cannot chown '%s'\n", dex_path);
673        goto fail;
674    }
675
676    ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path);
677
678    pid_t pid;
679    pid = fork();
680    if (pid == 0) {
681        /* child -- drop privileges before continuing */
682        if (setgid(uid) != 0) {
683            ALOGE("setgid(%d) failed during dexopt\n", uid);
684            exit(64);
685        }
686        if (setuid(uid) != 0) {
687            ALOGE("setuid(%d) during dexopt\n", uid);
688            exit(65);
689        }
690        // drop capabilities
691        struct __user_cap_header_struct capheader;
692        struct __user_cap_data_struct capdata[2];
693        memset(&capheader, 0, sizeof(capheader));
694        memset(&capdata, 0, sizeof(capdata));
695        capheader.version = _LINUX_CAPABILITY_VERSION_3;
696        if (capset(&capheader, &capdata[0]) < 0) {
697            ALOGE("capset failed: %s\n", strerror(errno));
698            exit(66);
699        }
700        if (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) {
701            ALOGE("flock(%s) failed: %s\n", dex_path, strerror(errno));
702            exit(67);
703        }
704
705        run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags);
706        exit(68);   /* only get here on exec failure */
707    } else {
708        res = wait_dexopt(pid, apk_path);
709        if (res != 0) {
710            ALOGE("dexopt failed on '%s' res = %d\n", dex_path, res);
711            goto fail;
712        }
713    }
714
715    ut.actime = apk_stat.st_atime;
716    ut.modtime = apk_stat.st_mtime;
717    utime(dex_path, &ut);
718
719    close(odex_fd);
720    close(zip_fd);
721    return 0;
722
723fail:
724    if (odex_fd >= 0) {
725        close(odex_fd);
726        unlink(dex_path);
727    }
728    if (zip_fd >= 0) {
729        close(zip_fd);
730    }
731    return -1;
732}
733
734void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
735        struct stat* statbuf)
736{
737    while (path[basepos] != 0) {
738        if (path[basepos] == '/') {
739            path[basepos] = 0;
740            if (lstat(path, statbuf) < 0) {
741                ALOGV("Making directory: %s\n", path);
742                if (mkdir(path, mode) == 0) {
743                    chown(path, uid, gid);
744                } else {
745                    ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
746                }
747            }
748            path[basepos] = '/';
749            basepos++;
750        }
751        basepos++;
752    }
753}
754
755int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
756        int dstuid, int dstgid, struct stat* statbuf)
757{
758    DIR *d;
759    struct dirent *de;
760    int res;
761
762    int srcend = strlen(srcpath);
763    int dstend = strlen(dstpath);
764
765    if (lstat(srcpath, statbuf) < 0) {
766        ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
767        return 1;
768    }
769
770    if ((statbuf->st_mode&S_IFDIR) == 0) {
771        mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
772                dstuid, dstgid, statbuf);
773        ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
774        if (rename(srcpath, dstpath) >= 0) {
775            if (chown(dstpath, dstuid, dstgid) < 0) {
776                ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
777                unlink(dstpath);
778                return 1;
779            }
780        } else {
781            ALOGW("Unable to rename %s to %s: %s\n",
782                srcpath, dstpath, strerror(errno));
783            return 1;
784        }
785        return 0;
786    }
787
788    d = opendir(srcpath);
789    if (d == NULL) {
790        ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
791        return 1;
792    }
793
794    res = 0;
795
796    while ((de = readdir(d))) {
797        const char *name = de->d_name;
798            /* always skip "." and ".." */
799        if (name[0] == '.') {
800            if (name[1] == 0) continue;
801            if ((name[1] == '.') && (name[2] == 0)) continue;
802        }
803
804        if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
805            ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
806            continue;
807        }
808
809        if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
810            ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
811            continue;
812        }
813
814        srcpath[srcend] = dstpath[dstend] = '/';
815        strcpy(srcpath+srcend+1, name);
816        strcpy(dstpath+dstend+1, name);
817
818        if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
819            res = 1;
820        }
821
822        // Note: we will be leaving empty directories behind in srcpath,
823        // but that is okay, the package manager will be erasing all of the
824        // data associated with .apks that disappear.
825
826        srcpath[srcend] = dstpath[dstend] = 0;
827    }
828
829    closedir(d);
830    return res;
831}
832
833int movefiles()
834{
835    DIR *d;
836    int dfd, subfd;
837    struct dirent *de;
838    struct stat s;
839    char buf[PKG_PATH_MAX+1];
840    int bufp, bufe, bufi, readlen;
841
842    char srcpkg[PKG_NAME_MAX];
843    char dstpkg[PKG_NAME_MAX];
844    char srcpath[PKG_PATH_MAX];
845    char dstpath[PKG_PATH_MAX];
846    int dstuid=-1, dstgid=-1;
847    int hasspace;
848
849    d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
850    if (d == NULL) {
851        goto done;
852    }
853    dfd = dirfd(d);
854
855        /* Iterate through all files in the directory, executing the
856         * file movements requested there-in.
857         */
858    while ((de = readdir(d))) {
859        const char *name = de->d_name;
860
861        if (de->d_type == DT_DIR) {
862            continue;
863        } else {
864            subfd = openat(dfd, name, O_RDONLY);
865            if (subfd < 0) {
866                ALOGW("Unable to open update commands at %s%s\n",
867                        UPDATE_COMMANDS_DIR_PREFIX, name);
868                continue;
869            }
870
871            bufp = 0;
872            bufe = 0;
873            buf[PKG_PATH_MAX] = 0;
874            srcpkg[0] = dstpkg[0] = 0;
875            while (1) {
876                bufi = bufp;
877                while (bufi < bufe && buf[bufi] != '\n') {
878                    bufi++;
879                }
880                if (bufi < bufe) {
881                    buf[bufi] = 0;
882                    ALOGV("Processing line: %s\n", buf+bufp);
883                    hasspace = 0;
884                    while (bufp < bufi && isspace(buf[bufp])) {
885                        hasspace = 1;
886                        bufp++;
887                    }
888                    if (buf[bufp] == '#' || bufp == bufi) {
889                        // skip comments and empty lines.
890                    } else if (hasspace) {
891                        if (dstpkg[0] == 0) {
892                            ALOGW("Path before package line in %s%s: %s\n",
893                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
894                        } else if (srcpkg[0] == 0) {
895                            // Skip -- source package no longer exists.
896                        } else {
897                            ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
898                            if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
899                                    !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
900                                movefileordir(srcpath, dstpath,
901                                        strlen(dstpath)-strlen(buf+bufp),
902                                        dstuid, dstgid, &s);
903                            }
904                        }
905                    } else {
906                        char* div = strchr(buf+bufp, ':');
907                        if (div == NULL) {
908                            ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
909                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
910                        } else {
911                            *div = 0;
912                            div++;
913                            if (strlen(buf+bufp) < PKG_NAME_MAX) {
914                                strcpy(dstpkg, buf+bufp);
915                            } else {
916                                srcpkg[0] = dstpkg[0] = 0;
917                                ALOGW("Package name too long in %s%s: %s\n",
918                                        UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
919                            }
920                            if (strlen(div) < PKG_NAME_MAX) {
921                                strcpy(srcpkg, div);
922                            } else {
923                                srcpkg[0] = dstpkg[0] = 0;
924                                ALOGW("Package name too long in %s%s: %s\n",
925                                        UPDATE_COMMANDS_DIR_PREFIX, name, div);
926                            }
927                            if (srcpkg[0] != 0) {
928                                if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
929                                    if (lstat(srcpath, &s) < 0) {
930                                        // Package no longer exists -- skip.
931                                        srcpkg[0] = 0;
932                                    }
933                                } else {
934                                    srcpkg[0] = 0;
935                                    ALOGW("Can't create path %s in %s%s\n",
936                                            div, UPDATE_COMMANDS_DIR_PREFIX, name);
937                                }
938                                if (srcpkg[0] != 0) {
939                                    if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
940                                        if (lstat(dstpath, &s) == 0) {
941                                            dstuid = s.st_uid;
942                                            dstgid = s.st_gid;
943                                        } else {
944                                            // Destination package doesn't
945                                            // exist...  due to original-package,
946                                            // this is normal, so don't be
947                                            // noisy about it.
948                                            srcpkg[0] = 0;
949                                        }
950                                    } else {
951                                        srcpkg[0] = 0;
952                                        ALOGW("Can't create path %s in %s%s\n",
953                                                div, UPDATE_COMMANDS_DIR_PREFIX, name);
954                                    }
955                                }
956                                ALOGV("Transfering from %s to %s: uid=%d\n",
957                                    srcpkg, dstpkg, dstuid);
958                            }
959                        }
960                    }
961                    bufp = bufi+1;
962                } else {
963                    if (bufp == 0) {
964                        if (bufp < bufe) {
965                            ALOGW("Line too long in %s%s, skipping: %s\n",
966                                    UPDATE_COMMANDS_DIR_PREFIX, name, buf);
967                        }
968                    } else if (bufp < bufe) {
969                        memcpy(buf, buf+bufp, bufe-bufp);
970                        bufe -= bufp;
971                        bufp = 0;
972                    }
973                    readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
974                    if (readlen < 0) {
975                        ALOGW("Failure reading update commands in %s%s: %s\n",
976                                UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
977                        break;
978                    } else if (readlen == 0) {
979                        break;
980                    }
981                    bufe += readlen;
982                    buf[bufe] = 0;
983                    ALOGV("Read buf: %s\n", buf);
984                }
985            }
986            close(subfd);
987        }
988    }
989    closedir(d);
990done:
991    return 0;
992}
993
994int linklib(const char* dataDir, const char* asecLibDir)
995{
996    char libdir[PKG_PATH_MAX];
997    struct stat s, libStat;
998    int rc = 0;
999
1000    const size_t libdirLen = strlen(dataDir) + strlen(PKG_LIB_POSTFIX);
1001    if (libdirLen >= PKG_PATH_MAX) {
1002        ALOGE("library dir len too large");
1003        return -1;
1004    }
1005
1006    if (snprintf(libdir, sizeof(libdir), "%s%s", dataDir, PKG_LIB_POSTFIX) != (ssize_t)libdirLen) {
1007        ALOGE("library dir not written successfully: %s\n", strerror(errno));
1008        return -1;
1009    }
1010
1011    if (stat(dataDir, &s) < 0) return -1;
1012
1013    if (chown(dataDir, AID_INSTALL, AID_INSTALL) < 0) {
1014        ALOGE("failed to chown '%s': %s\n", dataDir, strerror(errno));
1015        return -1;
1016    }
1017
1018    if (chmod(dataDir, 0700) < 0) {
1019        ALOGE("linklib() 1: failed to chmod '%s': %s\n", dataDir, strerror(errno));
1020        rc = -1;
1021        goto out;
1022    }
1023
1024    if (lstat(libdir, &libStat) < 0) {
1025        ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1026        rc = -1;
1027        goto out;
1028    }
1029
1030    if (S_ISDIR(libStat.st_mode)) {
1031        if (delete_dir_contents(libdir, 1, 0) < 0) {
1032            rc = -1;
1033            goto out;
1034        }
1035    } else if (S_ISLNK(libStat.st_mode)) {
1036        if (unlink(libdir) < 0) {
1037            rc = -1;
1038            goto out;
1039        }
1040    }
1041
1042    if (symlink(asecLibDir, libdir) < 0) {
1043        ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libdir, asecLibDir, strerror(errno));
1044        rc = -errno;
1045        goto out;
1046    }
1047
1048    if (lchown(libdir, AID_SYSTEM, AID_SYSTEM) < 0) {
1049        ALOGE("cannot chown dir '%s': %s\n", libdir, strerror(errno));
1050        unlink(libdir);
1051        rc = -errno;
1052        goto out;
1053    }
1054
1055out:
1056    if (chmod(dataDir, s.st_mode) < 0) {
1057        ALOGE("linklib() 2: failed to chmod '%s': %s\n", dataDir, strerror(errno));
1058        rc = -errno;
1059    }
1060
1061    if (chown(dataDir, s.st_uid, s.st_gid) < 0) {
1062        ALOGE("failed to chown '%s' : %s\n", dataDir, strerror(errno));
1063        return -errno;
1064    }
1065
1066    return rc;
1067}
1068