1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <dirent.h>
18#include <errno.h>
19#include <fcntl.h>
20#include <limits.h>
21#include <poll.h>
22#include <signal.h>
23#include <stdarg.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string>
27#include <string.h>
28#include <sys/capability.h>
29#include <sys/inotify.h>
30#include <sys/stat.h>
31#include <sys/sysconf.h>
32#include <sys/time.h>
33#include <sys/wait.h>
34#include <sys/klog.h>
35#include <time.h>
36#include <unistd.h>
37#include <vector>
38#include <sys/prctl.h>
39
40#define LOG_TAG "dumpstate"
41#include <cutils/debugger.h>
42#include <cutils/log.h>
43#include <cutils/properties.h>
44#include <cutils/sockets.h>
45#include <private/android_filesystem_config.h>
46
47#include <selinux/android.h>
48
49#include "dumpstate.h"
50
51static const int64_t NANOS_PER_SEC = 1000000000;
52
53/* list of native processes to include in the native dumps */
54// This matches the /proc/pid/exe link instead of /proc/pid/cmdline.
55static const char* native_processes_to_dump[] = {
56        "/system/bin/audioserver",
57        "/system/bin/cameraserver",
58        "/system/bin/drmserver",
59        "/system/bin/mediacodec",     // media.codec
60        "/system/bin/mediadrmserver",
61        "/system/bin/mediaextractor", // media.extractor
62        "/system/bin/mediaserver",
63        "/system/bin/sdcard",
64        "/system/bin/surfaceflinger",
65        "/system/bin/vehicle_network_service",
66        NULL,
67};
68
69DurationReporter::DurationReporter(const char *title) : DurationReporter(title, stdout) {}
70
71DurationReporter::DurationReporter(const char *title, FILE *out) {
72    title_ = title;
73    if (title) {
74        started_ = DurationReporter::nanotime();
75    }
76    out_ = out;
77}
78
79DurationReporter::~DurationReporter() {
80    if (title_) {
81        uint64_t elapsed = DurationReporter::nanotime() - started_;
82        // Use "Yoda grammar" to make it easier to grep|sort sections.
83        if (out_) {
84            fprintf(out_, "------ %.3fs was the duration of '%s' ------\n",
85                   (float) elapsed / NANOS_PER_SEC, title_);
86        } else {
87            MYLOGD("Duration of '%s': %.3fs\n", title_, (float) elapsed / NANOS_PER_SEC);
88        }
89    }
90}
91
92uint64_t DurationReporter::DurationReporter::nanotime() {
93    struct timespec ts;
94    clock_gettime(CLOCK_MONOTONIC, &ts);
95    return (uint64_t) ts.tv_sec * NANOS_PER_SEC + ts.tv_nsec;
96}
97
98void for_each_userid(void (*func)(int), const char *header) {
99    ON_DRY_RUN_RETURN();
100    DIR *d;
101    struct dirent *de;
102
103    if (header) printf("\n------ %s ------\n", header);
104    func(0);
105
106    if (!(d = opendir("/data/system/users"))) {
107        printf("Failed to open /data/system/users (%s)\n", strerror(errno));
108        return;
109    }
110
111    while ((de = readdir(d))) {
112        int userid;
113        if (de->d_type != DT_DIR || !(userid = atoi(de->d_name))) {
114            continue;
115        }
116        func(userid);
117    }
118
119    closedir(d);
120}
121
122static void __for_each_pid(void (*helper)(int, const char *, void *), const char *header, void *arg) {
123    DIR *d;
124    struct dirent *de;
125
126    if (!(d = opendir("/proc"))) {
127        printf("Failed to open /proc (%s)\n", strerror(errno));
128        return;
129    }
130
131    if (header) printf("\n------ %s ------\n", header);
132    while ((de = readdir(d))) {
133        int pid;
134        int fd;
135        char cmdpath[255];
136        char cmdline[255];
137
138        if (!(pid = atoi(de->d_name))) {
139            continue;
140        }
141
142        memset(cmdline, 0, sizeof(cmdline));
143
144        snprintf(cmdpath, sizeof(cmdpath), "/proc/%d/cmdline", pid);
145        if ((fd = TEMP_FAILURE_RETRY(open(cmdpath, O_RDONLY | O_CLOEXEC))) >= 0) {
146            TEMP_FAILURE_RETRY(read(fd, cmdline, sizeof(cmdline) - 2));
147            close(fd);
148            if (cmdline[0]) {
149                helper(pid, cmdline, arg);
150                continue;
151            }
152        }
153
154        // if no cmdline, a kernel thread has comm
155        snprintf(cmdpath, sizeof(cmdpath), "/proc/%d/comm", pid);
156        if ((fd = TEMP_FAILURE_RETRY(open(cmdpath, O_RDONLY | O_CLOEXEC))) >= 0) {
157            TEMP_FAILURE_RETRY(read(fd, cmdline + 1, sizeof(cmdline) - 4));
158            close(fd);
159            if (cmdline[1]) {
160                cmdline[0] = '[';
161                size_t len = strcspn(cmdline, "\f\b\r\n");
162                cmdline[len] = ']';
163                cmdline[len+1] = '\0';
164            }
165        }
166        if (!cmdline[0]) {
167            strcpy(cmdline, "N/A");
168        }
169        helper(pid, cmdline, arg);
170    }
171
172    closedir(d);
173}
174
175static void for_each_pid_helper(int pid, const char *cmdline, void *arg) {
176    for_each_pid_func *func = (for_each_pid_func*) arg;
177    func(pid, cmdline);
178}
179
180void for_each_pid(for_each_pid_func func, const char *header) {
181    ON_DRY_RUN_RETURN();
182  __for_each_pid(for_each_pid_helper, header, (void *)func);
183}
184
185static void for_each_tid_helper(int pid, const char *cmdline, void *arg) {
186    DIR *d;
187    struct dirent *de;
188    char taskpath[255];
189    for_each_tid_func *func = (for_each_tid_func *) arg;
190
191    snprintf(taskpath, sizeof(taskpath), "/proc/%d/task", pid);
192
193    if (!(d = opendir(taskpath))) {
194        printf("Failed to open %s (%s)\n", taskpath, strerror(errno));
195        return;
196    }
197
198    func(pid, pid, cmdline);
199
200    while ((de = readdir(d))) {
201        int tid;
202        int fd;
203        char commpath[255];
204        char comm[255];
205
206        if (!(tid = atoi(de->d_name))) {
207            continue;
208        }
209
210        if (tid == pid)
211            continue;
212
213        snprintf(commpath, sizeof(commpath), "/proc/%d/comm", tid);
214        memset(comm, 0, sizeof(comm));
215        if ((fd = TEMP_FAILURE_RETRY(open(commpath, O_RDONLY | O_CLOEXEC))) < 0) {
216            strcpy(comm, "N/A");
217        } else {
218            char *c;
219            TEMP_FAILURE_RETRY(read(fd, comm, sizeof(comm) - 2));
220            close(fd);
221
222            c = strrchr(comm, '\n');
223            if (c) {
224                *c = '\0';
225            }
226        }
227        func(pid, tid, comm);
228    }
229
230    closedir(d);
231}
232
233void for_each_tid(for_each_tid_func func, const char *header) {
234    ON_DRY_RUN_RETURN();
235    __for_each_pid(for_each_tid_helper, header, (void *) func);
236}
237
238void show_wchan(int pid, int tid, const char *name) {
239    ON_DRY_RUN_RETURN();
240    char path[255];
241    char buffer[255];
242    int fd, ret, save_errno;
243    char name_buffer[255];
244
245    memset(buffer, 0, sizeof(buffer));
246
247    snprintf(path, sizeof(path), "/proc/%d/wchan", tid);
248    if ((fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC))) < 0) {
249        printf("Failed to open '%s' (%s)\n", path, strerror(errno));
250        return;
251    }
252
253    ret = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer)));
254    save_errno = errno;
255    close(fd);
256
257    if (ret < 0) {
258        printf("Failed to read '%s' (%s)\n", path, strerror(save_errno));
259        return;
260    }
261
262    snprintf(name_buffer, sizeof(name_buffer), "%*s%s",
263             pid == tid ? 0 : 3, "", name);
264
265    printf("%-7d %-32s %s\n", tid, name_buffer, buffer);
266
267    return;
268}
269
270// print time in centiseconds
271static void snprcent(char *buffer, size_t len, size_t spc,
272                     unsigned long long time) {
273    static long hz; // cache discovered hz
274
275    if (hz <= 0) {
276        hz = sysconf(_SC_CLK_TCK);
277        if (hz <= 0) {
278            hz = 1000;
279        }
280    }
281
282    // convert to centiseconds
283    time = (time * 100 + (hz / 2)) / hz;
284
285    char str[16];
286
287    snprintf(str, sizeof(str), " %llu.%02u",
288             time / 100, (unsigned)(time % 100));
289    size_t offset = strlen(buffer);
290    snprintf(buffer + offset, (len > offset) ? len - offset : 0,
291             "%*s", (spc > offset) ? (int)(spc - offset) : 0, str);
292}
293
294// print permille as a percent
295static void snprdec(char *buffer, size_t len, size_t spc, unsigned permille) {
296    char str[16];
297
298    snprintf(str, sizeof(str), " %u.%u%%", permille / 10, permille % 10);
299    size_t offset = strlen(buffer);
300    snprintf(buffer + offset, (len > offset) ? len - offset : 0,
301             "%*s", (spc > offset) ? (int)(spc - offset) : 0, str);
302}
303
304void show_showtime(int pid, const char *name) {
305    ON_DRY_RUN_RETURN();
306    char path[255];
307    char buffer[1023];
308    int fd, ret, save_errno;
309
310    memset(buffer, 0, sizeof(buffer));
311
312    snprintf(path, sizeof(path), "/proc/%d/stat", pid);
313    if ((fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC))) < 0) {
314        printf("Failed to open '%s' (%s)\n", path, strerror(errno));
315        return;
316    }
317
318    ret = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer)));
319    save_errno = errno;
320    close(fd);
321
322    if (ret < 0) {
323        printf("Failed to read '%s' (%s)\n", path, strerror(save_errno));
324        return;
325    }
326
327    // field 14 is utime
328    // field 15 is stime
329    // field 42 is iotime
330    unsigned long long utime = 0, stime = 0, iotime = 0;
331    if (sscanf(buffer,
332               "%*u %*s %*s %*d %*d %*d %*d %*d %*d %*d %*d "
333               "%*d %*d %llu %llu %*d %*d %*d %*d %*d %*d "
334               "%*d %*d %*d %*d %*d %*d %*d %*d %*d %*d "
335               "%*d %*d %*d %*d %*d %*d %*d %*d %*d %llu ",
336               &utime, &stime, &iotime) != 3) {
337        return;
338    }
339
340    unsigned long long total = utime + stime;
341    if (!total) {
342        return;
343    }
344
345    unsigned permille = (iotime * 1000 + (total / 2)) / total;
346    if (permille > 1000) {
347        permille = 1000;
348    }
349
350    // try to beautify and stabilize columns at <80 characters
351    snprintf(buffer, sizeof(buffer), "%-6d%s", pid, name);
352    if ((name[0] != '[') || utime) {
353        snprcent(buffer, sizeof(buffer), 57, utime);
354    }
355    snprcent(buffer, sizeof(buffer), 65, stime);
356    if ((name[0] != '[') || iotime) {
357        snprcent(buffer, sizeof(buffer), 73, iotime);
358    }
359    if (iotime) {
360        snprdec(buffer, sizeof(buffer), 79, permille);
361    }
362    puts(buffer); // adds a trailing newline
363
364    return;
365}
366
367void do_dmesg() {
368    const char *title = "KERNEL LOG (dmesg)";
369    DurationReporter duration_reporter(title);
370    printf("------ %s ------\n", title);
371
372    ON_DRY_RUN_RETURN();
373    /* Get size of kernel buffer */
374    int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0);
375    if (size <= 0) {
376        printf("Unexpected klogctl return value: %d\n\n", size);
377        return;
378    }
379    char *buf = (char *) malloc(size + 1);
380    if (buf == NULL) {
381        printf("memory allocation failed\n\n");
382        return;
383    }
384    int retval = klogctl(KLOG_READ_ALL, buf, size);
385    if (retval < 0) {
386        printf("klogctl failure\n\n");
387        free(buf);
388        return;
389    }
390    buf[retval] = '\0';
391    printf("%s\n\n", buf);
392    free(buf);
393    return;
394}
395
396void do_showmap(int pid, const char *name) {
397    char title[255];
398    char arg[255];
399
400    snprintf(title, sizeof(title), "SHOW MAP %d (%s)", pid, name);
401    snprintf(arg, sizeof(arg), "%d", pid);
402    run_command(title, 10, SU_PATH, "root", "showmap", "-q", arg, NULL);
403}
404
405static int _dump_file_from_fd(const char *title, const char *path, int fd) {
406    if (title) {
407        printf("------ %s (%s", title, path);
408
409        struct stat st;
410        // Only show the modification time of non-device files.
411        size_t path_len = strlen(path);
412        if ((path_len < 6 || memcmp(path, "/proc/", 6)) &&
413                (path_len < 5 || memcmp(path, "/sys/", 5)) &&
414                (path_len < 3 || memcmp(path, "/d/", 3)) &&
415                !fstat(fd, &st)) {
416            char stamp[80];
417            time_t mtime = st.st_mtime;
418            strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime));
419            printf(": %s", stamp);
420        }
421        printf(") ------\n");
422    }
423    ON_DRY_RUN({ update_progress(WEIGHT_FILE); close(fd); return 0; });
424
425    bool newline = false;
426    fd_set read_set;
427    struct timeval tm;
428    while (1) {
429        FD_ZERO(&read_set);
430        FD_SET(fd, &read_set);
431        /* Timeout if no data is read for 30 seconds. */
432        tm.tv_sec = 30;
433        tm.tv_usec = 0;
434        uint64_t elapsed = DurationReporter::nanotime();
435        int ret = TEMP_FAILURE_RETRY(select(fd + 1, &read_set, NULL, NULL, &tm));
436        if (ret == -1) {
437            printf("*** %s: select failed: %s\n", path, strerror(errno));
438            newline = true;
439            break;
440        } else if (ret == 0) {
441            elapsed = DurationReporter::nanotime() - elapsed;
442            printf("*** %s: Timed out after %.3fs\n", path,
443                   (float) elapsed / NANOS_PER_SEC);
444            newline = true;
445            break;
446        } else {
447            char buffer[65536];
448            ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer)));
449            if (bytes_read > 0) {
450                fwrite(buffer, bytes_read, 1, stdout);
451                newline = (buffer[bytes_read-1] == '\n');
452            } else {
453                if (bytes_read == -1) {
454                    printf("*** %s: Failed to read from fd: %s", path, strerror(errno));
455                    newline = true;
456                }
457                break;
458            }
459        }
460    }
461    update_progress(WEIGHT_FILE);
462    close(fd);
463
464    if (!newline) printf("\n");
465    if (title) printf("\n");
466    return 0;
467}
468
469/* prints the contents of a file */
470int dump_file(const char *title, const char *path) {
471    DurationReporter duration_reporter(title);
472    int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC));
473    if (fd < 0) {
474        int err = errno;
475        printf("*** %s: %s\n", path, strerror(err));
476        if (title) printf("\n");
477        return -1;
478    }
479    return _dump_file_from_fd(title, path, fd);
480}
481
482int read_file_as_long(const char *path, long int *output) {
483    int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC));
484    if (fd < 0) {
485        int err = errno;
486        MYLOGE("Error opening file descriptor for %s: %s\n", path, strerror(err));
487        return -1;
488    }
489    char buffer[50];
490    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer)));
491    if (bytes_read == -1) {
492        MYLOGE("Error reading file %s: %s\n", path, strerror(errno));
493        return -2;
494    }
495    if (bytes_read == 0) {
496        MYLOGE("File %s is empty\n", path);
497        return -3;
498    }
499    *output = atoi(buffer);
500    return 0;
501}
502
503/* calls skip to gate calling dump_from_fd recursively
504 * in the specified directory. dump_from_fd defaults to
505 * dump_file_from_fd above when set to NULL. skip defaults
506 * to false when set to NULL. dump_from_fd will always be
507 * called with title NULL.
508 */
509int dump_files(const char *title, const char *dir,
510        bool (*skip)(const char *path),
511        int (*dump_from_fd)(const char *title, const char *path, int fd)) {
512    DurationReporter duration_reporter(title);
513    DIR *dirp;
514    struct dirent *d;
515    char *newpath = NULL;
516    const char *slash = "/";
517    int fd, retval = 0;
518
519    if (title) {
520        printf("------ %s (%s) ------\n", title, dir);
521    }
522    ON_DRY_RUN_RETURN(0);
523
524    if (dir[strlen(dir) - 1] == '/') {
525        ++slash;
526    }
527    dirp = opendir(dir);
528    if (dirp == NULL) {
529        retval = -errno;
530        MYLOGE("%s: %s\n", dir, strerror(errno));
531        return retval;
532    }
533
534    if (!dump_from_fd) {
535        dump_from_fd = dump_file_from_fd;
536    }
537    for (; ((d = readdir(dirp))); free(newpath), newpath = NULL) {
538        if ((d->d_name[0] == '.')
539         && (((d->d_name[1] == '.') && (d->d_name[2] == '\0'))
540          || (d->d_name[1] == '\0'))) {
541            continue;
542        }
543        asprintf(&newpath, "%s%s%s%s", dir, slash, d->d_name,
544                 (d->d_type == DT_DIR) ? "/" : "");
545        if (!newpath) {
546            retval = -errno;
547            continue;
548        }
549        if (skip && (*skip)(newpath)) {
550            continue;
551        }
552        if (d->d_type == DT_DIR) {
553            int ret = dump_files(NULL, newpath, skip, dump_from_fd);
554            if (ret < 0) {
555                retval = ret;
556            }
557            continue;
558        }
559        fd = TEMP_FAILURE_RETRY(open(newpath, O_RDONLY | O_NONBLOCK | O_CLOEXEC));
560        if (fd < 0) {
561            retval = fd;
562            printf("*** %s: %s\n", newpath, strerror(errno));
563            continue;
564        }
565        (*dump_from_fd)(NULL, newpath, fd);
566    }
567    closedir(dirp);
568    if (title) {
569        printf("\n");
570    }
571    return retval;
572}
573
574/* fd must have been opened with the flag O_NONBLOCK. With this flag set,
575 * it's possible to avoid issues where opening the file itself can get
576 * stuck.
577 */
578int dump_file_from_fd(const char *title, const char *path, int fd) {
579    int flags = fcntl(fd, F_GETFL);
580    if (flags == -1) {
581        printf("*** %s: failed to get flags on fd %d: %s\n", path, fd, strerror(errno));
582        close(fd);
583        return -1;
584    } else if (!(flags & O_NONBLOCK)) {
585        printf("*** %s: fd must have O_NONBLOCK set.\n", path);
586        close(fd);
587        return -1;
588    }
589    return _dump_file_from_fd(title, path, fd);
590}
591
592bool waitpid_with_timeout(pid_t pid, int timeout_seconds, int* status) {
593    sigset_t child_mask, old_mask;
594    sigemptyset(&child_mask);
595    sigaddset(&child_mask, SIGCHLD);
596
597    if (sigprocmask(SIG_BLOCK, &child_mask, &old_mask) == -1) {
598        printf("*** sigprocmask failed: %s\n", strerror(errno));
599        return false;
600    }
601
602    struct timespec ts;
603    ts.tv_sec = timeout_seconds;
604    ts.tv_nsec = 0;
605    int ret = TEMP_FAILURE_RETRY(sigtimedwait(&child_mask, NULL, &ts));
606    int saved_errno = errno;
607    // Set the signals back the way they were.
608    if (sigprocmask(SIG_SETMASK, &old_mask, NULL) == -1) {
609        printf("*** sigprocmask failed: %s\n", strerror(errno));
610        if (ret == 0) {
611            return false;
612        }
613    }
614    if (ret == -1) {
615        errno = saved_errno;
616        if (errno == EAGAIN) {
617            errno = ETIMEDOUT;
618        } else {
619            printf("*** sigtimedwait failed: %s\n", strerror(errno));
620        }
621        return false;
622    }
623
624    pid_t child_pid = waitpid(pid, status, WNOHANG);
625    if (child_pid != pid) {
626        if (child_pid != -1) {
627            printf("*** Waiting for pid %d, got pid %d instead\n", pid, child_pid);
628        } else {
629            printf("*** waitpid failed: %s\n", strerror(errno));
630        }
631        return false;
632    }
633    return true;
634}
635
636// TODO: refactor all those commands that convert args
637void format_args(const char* command, const char *args[], std::string *string);
638
639int run_command(const char *title, int timeout_seconds, const char *command, ...) {
640    DurationReporter duration_reporter(title);
641    fflush(stdout);
642
643    const char *args[1024] = {command};
644    size_t arg;
645    va_list ap;
646    va_start(ap, command);
647    if (title) printf("------ %s (%s", title, command);
648    bool null_terminated = false;
649    for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
650        args[arg] = va_arg(ap, const char *);
651        if (args[arg] == nullptr) {
652            null_terminated = true;
653            break;
654        }
655        // TODO: null_terminated check is not really working; line below would crash dumpstate if
656        // nullptr is missing
657        if (title) printf(" %s", args[arg]);
658    }
659    if (title) printf(") ------\n");
660    fflush(stdout);
661    if (!null_terminated) {
662        // Fail now, otherwise execvp() call on run_command_always() might hang.
663        std::string cmd;
664        format_args(command, args, &cmd);
665        MYLOGE("skipping command %s because its args were not NULL-terminated", cmd.c_str());
666        return -1;
667    }
668
669    ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; });
670
671    int status = run_command_always(title, DONT_DROP_ROOT, NORMAL_STDOUT, timeout_seconds, args);
672    va_end(ap);
673    return status;
674}
675
676int run_command_as_shell(const char *title, int timeout_seconds, const char *command, ...) {
677    DurationReporter duration_reporter(title);
678    fflush(stdout);
679
680    const char *args[1024] = {command};
681    size_t arg;
682    va_list ap;
683    va_start(ap, command);
684    if (title) printf("------ %s (%s", title, command);
685    bool null_terminated = false;
686    for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
687        args[arg] = va_arg(ap, const char *);
688        if (args[arg] == nullptr) {
689            null_terminated = true;
690            break;
691        }
692        // TODO: null_terminated check is not really working; line below would crash dumpstate if
693        // nullptr is missing
694        if (title) printf(" %s", args[arg]);
695    }
696    if (title) printf(") ------\n");
697    fflush(stdout);
698    if (!null_terminated) {
699        // Fail now, otherwise execvp() call on run_command_always() might hang.
700        std::string cmd;
701        format_args(command, args, &cmd);
702        MYLOGE("skipping command %s because its args were not NULL-terminated", cmd.c_str());
703        return -1;
704    }
705
706    ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; });
707
708    int status = run_command_always(title, DROP_ROOT, NORMAL_STDOUT, timeout_seconds, args);
709    va_end(ap);
710    return status;
711}
712
713/* forks a command and waits for it to finish */
714int run_command_always(const char *title, RootMode root_mode, StdoutMode stdout_mode,
715        int timeout_seconds, const char *args[]) {
716    bool silent = (stdout_mode == REDIRECT_TO_STDERR);
717    // TODO: need to check if args is null-terminated, otherwise execvp will crash dumpstate
718
719    /* TODO: for now we're simplifying the progress calculation by using the timeout as the weight.
720     * It's a good approximation for most cases, except when calling dumpsys, where its weight
721     * should be much higher proportionally to its timeout. */
722    int weight = timeout_seconds;
723
724    const char *command = args[0];
725    uint64_t start = DurationReporter::nanotime();
726    pid_t pid = fork();
727
728    /* handle error case */
729    if (pid < 0) {
730        if (!silent) printf("*** fork: %s\n", strerror(errno));
731        MYLOGE("*** fork: %s\n", strerror(errno));
732        return pid;
733    }
734
735    /* handle child case */
736    if (pid == 0) {
737        if (root_mode == DROP_ROOT && !drop_root_user()) {
738        if (!silent) printf("*** fail todrop root before running %s: %s\n", command,
739                strerror(errno));
740            MYLOGE("*** could not drop root before running %s: %s\n", command, strerror(errno));
741            return -1;
742        }
743
744        if (silent) {
745            // Redirect stderr to stdout
746            dup2(STDERR_FILENO, STDOUT_FILENO);
747        }
748
749        /* make sure the child dies when dumpstate dies */
750        prctl(PR_SET_PDEATHSIG, SIGKILL);
751
752        /* just ignore SIGPIPE, will go down with parent's */
753        struct sigaction sigact;
754        memset(&sigact, 0, sizeof(sigact));
755        sigact.sa_handler = SIG_IGN;
756        sigaction(SIGPIPE, &sigact, NULL);
757
758        execvp(command, (char**) args);
759        // execvp's result will be handled after waitpid_with_timeout() below, but if it failed,
760        // it's safer to exit dumpstate.
761        MYLOGD("execvp on command '%s' failed (error: %s)", command, strerror(errno));
762        fflush(stdout);
763        // Must call _exit (instead of exit), otherwise it will corrupt the zip file.
764        _exit(EXIT_FAILURE);
765    }
766
767    /* handle parent case */
768    int status;
769    bool ret = waitpid_with_timeout(pid, timeout_seconds, &status);
770    uint64_t elapsed = DurationReporter::nanotime() - start;
771    std::string cmd; // used to log command and its args
772    if (!ret) {
773        if (errno == ETIMEDOUT) {
774            format_args(command, args, &cmd);
775            if (!silent) printf("*** command '%s' timed out after %.3fs (killing pid %d)\n",
776            cmd.c_str(), (float) elapsed / NANOS_PER_SEC, pid);
777            MYLOGE("command '%s' timed out after %.3fs (killing pid %d)\n", cmd.c_str(),
778                   (float) elapsed / NANOS_PER_SEC, pid);
779        } else {
780            format_args(command, args, &cmd);
781            if (!silent) printf("*** command '%s': Error after %.4fs (killing pid %d)\n",
782            cmd.c_str(), (float) elapsed / NANOS_PER_SEC, pid);
783            MYLOGE("command '%s': Error after %.4fs (killing pid %d)\n", cmd.c_str(),
784                   (float) elapsed / NANOS_PER_SEC, pid);
785        }
786        kill(pid, SIGTERM);
787        if (!waitpid_with_timeout(pid, 5, NULL)) {
788            kill(pid, SIGKILL);
789            if (!waitpid_with_timeout(pid, 5, NULL)) {
790                if (!silent) printf("could not kill command '%s' (pid %d) even with SIGKILL.\n",
791                        command, pid);
792                MYLOGE("could not kill command '%s' (pid %d) even with SIGKILL.\n", command, pid);
793            }
794        }
795        return -1;
796    } else if (status) {
797        format_args(command, args, &cmd);
798        if (!silent) printf("*** command '%s' failed: %s\n", cmd.c_str(), strerror(errno));
799        MYLOGE("command '%s' failed: %s\n", cmd.c_str(), strerror(errno));
800        return -2;
801    }
802
803    if (WIFSIGNALED(status)) {
804        if (!silent) printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
805        MYLOGE("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
806    } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) {
807        if (!silent) printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
808        MYLOGE("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
809    }
810
811    if (weight > 0) {
812        update_progress(weight);
813    }
814    return status;
815}
816
817bool drop_root_user() {
818    if (getgid() == AID_SHELL && getuid() == AID_SHELL) {
819        MYLOGD("drop_root_user(): already running as Shell");
820        return true;
821    }
822    /* ensure we will keep capabilities when we drop root */
823    if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
824        MYLOGE("prctl(PR_SET_KEEPCAPS) failed: %s\n", strerror(errno));
825        return false;
826    }
827
828    gid_t groups[] = { AID_LOG, AID_SDCARD_R, AID_SDCARD_RW,
829            AID_MOUNT, AID_INET, AID_NET_BW_STATS, AID_READPROC };
830    if (setgroups(sizeof(groups)/sizeof(groups[0]), groups) != 0) {
831        MYLOGE("Unable to setgroups, aborting: %s\n", strerror(errno));
832        return false;
833    }
834    if (setgid(AID_SHELL) != 0) {
835        MYLOGE("Unable to setgid, aborting: %s\n", strerror(errno));
836        return false;
837    }
838    if (setuid(AID_SHELL) != 0) {
839        MYLOGE("Unable to setuid, aborting: %s\n", strerror(errno));
840        return false;
841    }
842
843    struct __user_cap_header_struct capheader;
844    struct __user_cap_data_struct capdata[2];
845    memset(&capheader, 0, sizeof(capheader));
846    memset(&capdata, 0, sizeof(capdata));
847    capheader.version = _LINUX_CAPABILITY_VERSION_3;
848    capheader.pid = 0;
849
850    capdata[CAP_TO_INDEX(CAP_SYSLOG)].permitted = CAP_TO_MASK(CAP_SYSLOG);
851    capdata[CAP_TO_INDEX(CAP_SYSLOG)].effective = CAP_TO_MASK(CAP_SYSLOG);
852    capdata[0].inheritable = 0;
853    capdata[1].inheritable = 0;
854
855    if (capset(&capheader, &capdata[0]) < 0) {
856        MYLOGE("capset failed: %s\n", strerror(errno));
857        return false;
858    }
859
860    return true;
861}
862
863void send_broadcast(const std::string& action, const std::vector<std::string>& args) {
864    if (args.size() > 1000) {
865        MYLOGE("send_broadcast: too many arguments (%d)\n", (int) args.size());
866        return;
867    }
868    const char *am_args[1024] = { "/system/bin/am", "broadcast", "--user", "0", "-a",
869                                  action.c_str() };
870    size_t am_index = 5; // Starts at the index of last initial value above.
871    for (const std::string& arg : args) {
872        am_args[++am_index] = arg.c_str();
873    }
874    // Always terminate with NULL.
875    am_args[am_index + 1] = NULL;
876    std::string args_string;
877    format_args(am_index + 1, am_args, &args_string);
878    MYLOGD("send_broadcast command: %s\n", args_string.c_str());
879    run_command_always(NULL, DROP_ROOT, REDIRECT_TO_STDERR, 20, am_args);
880}
881
882size_t num_props = 0;
883static char* props[2000];
884
885static void print_prop(const char *key, const char *name, void *user) {
886    (void) user;
887    if (num_props < sizeof(props) / sizeof(props[0])) {
888        char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10];
889        snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name);
890        props[num_props++] = strdup(buf);
891    }
892}
893
894static int compare_prop(const void *a, const void *b) {
895    return strcmp(*(char * const *) a, *(char * const *) b);
896}
897
898/* prints all the system properties */
899void print_properties() {
900    const char* title = "SYSTEM PROPERTIES";
901    DurationReporter duration_reporter(title);
902    printf("------ %s ------\n", title);
903    ON_DRY_RUN_RETURN();
904    size_t i;
905    num_props = 0;
906    property_list(print_prop, NULL);
907    qsort(&props, num_props, sizeof(props[0]), compare_prop);
908
909    for (i = 0; i < num_props; ++i) {
910        fputs(props[i], stdout);
911        free(props[i]);
912    }
913    printf("\n");
914}
915
916int open_socket(const char *service) {
917    int s = android_get_control_socket(service);
918    if (s < 0) {
919        MYLOGE("android_get_control_socket(%s): %s\n", service, strerror(errno));
920        exit(1);
921    }
922    fcntl(s, F_SETFD, FD_CLOEXEC);
923    if (listen(s, 4) < 0) {
924        MYLOGE("listen(control socket): %s\n", strerror(errno));
925        exit(1);
926    }
927
928    struct sockaddr addr;
929    socklen_t alen = sizeof(addr);
930    int fd = accept(s, &addr, &alen);
931    if (fd < 0) {
932        MYLOGE("accept(control socket): %s\n", strerror(errno));
933        exit(1);
934    }
935
936    return fd;
937}
938
939/* redirect output to a service control socket */
940void redirect_to_socket(FILE *redirect, const char *service) {
941    int fd = open_socket(service);
942    fflush(redirect);
943    dup2(fd, fileno(redirect));
944    close(fd);
945}
946
947// TODO: should call is_valid_output_file and/or be merged into it.
948void create_parent_dirs(const char *path) {
949    char *chp = const_cast<char *> (path);
950
951    /* skip initial slash */
952    if (chp[0] == '/')
953        chp++;
954
955    /* create leading directories, if necessary */
956    struct stat dir_stat;
957    while (chp && chp[0]) {
958        chp = strchr(chp, '/');
959        if (chp) {
960            *chp = 0;
961            if (stat(path, &dir_stat) == -1 || !S_ISDIR(dir_stat.st_mode)) {
962                MYLOGI("Creating directory %s\n", path);
963                if (mkdir(path, 0770)) { /* drwxrwx--- */
964                    MYLOGE("Unable to create directory %s: %s\n", path, strerror(errno));
965                } else if (chown(path, AID_SHELL, AID_SHELL)) {
966                    MYLOGE("Unable to change ownership of dir %s: %s\n", path, strerror(errno));
967                }
968            }
969            *chp++ = '/';
970        }
971    }
972}
973
974/* redirect output to a file */
975void redirect_to_file(FILE *redirect, char *path) {
976    create_parent_dirs(path);
977
978    int fd = TEMP_FAILURE_RETRY(open(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW,
979                                     S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
980    if (fd < 0) {
981        MYLOGE("%s: %s\n", path, strerror(errno));
982        exit(1);
983    }
984
985    TEMP_FAILURE_RETRY(dup2(fd, fileno(redirect)));
986    close(fd);
987}
988
989static bool should_dump_native_traces(const char* path) {
990    for (const char** p = native_processes_to_dump; *p; p++) {
991        if (!strcmp(*p, path)) {
992            return true;
993        }
994    }
995    return false;
996}
997
998/* dump Dalvik and native stack traces, return the trace file location (NULL if none) */
999const char *dump_traces() {
1000    DurationReporter duration_reporter("DUMP TRACES", NULL);
1001    ON_DRY_RUN_RETURN(NULL);
1002    const char* result = NULL;
1003
1004    char traces_path[PROPERTY_VALUE_MAX] = "";
1005    property_get("dalvik.vm.stack-trace-file", traces_path, "");
1006    if (!traces_path[0]) return NULL;
1007
1008    /* move the old traces.txt (if any) out of the way temporarily */
1009    char anr_traces_path[PATH_MAX];
1010    strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path));
1011    strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path));
1012    if (rename(traces_path, anr_traces_path) && errno != ENOENT) {
1013        MYLOGE("rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno));
1014        return NULL;  // Can't rename old traces.txt -- no permission? -- leave it alone instead
1015    }
1016
1017    /* create a new, empty traces.txt file to receive stack dumps */
1018    int fd = TEMP_FAILURE_RETRY(open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW | O_CLOEXEC,
1019                                     0666));  /* -rw-rw-rw- */
1020    if (fd < 0) {
1021        MYLOGE("%s: %s\n", traces_path, strerror(errno));
1022        return NULL;
1023    }
1024    int chmod_ret = fchmod(fd, 0666);
1025    if (chmod_ret < 0) {
1026        MYLOGE("fchmod on %s failed: %s\n", traces_path, strerror(errno));
1027        close(fd);
1028        return NULL;
1029    }
1030
1031    /* Variables below must be initialized before 'goto' statements */
1032    int dalvik_found = 0;
1033    int ifd, wfd = -1;
1034
1035    /* walk /proc and kill -QUIT all Dalvik processes */
1036    DIR *proc = opendir("/proc");
1037    if (proc == NULL) {
1038        MYLOGE("/proc: %s\n", strerror(errno));
1039        goto error_close_fd;
1040    }
1041
1042    /* use inotify to find when processes are done dumping */
1043    ifd = inotify_init();
1044    if (ifd < 0) {
1045        MYLOGE("inotify_init: %s\n", strerror(errno));
1046        goto error_close_fd;
1047    }
1048
1049    wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE);
1050    if (wfd < 0) {
1051        MYLOGE("inotify_add_watch(%s): %s\n", traces_path, strerror(errno));
1052        goto error_close_ifd;
1053    }
1054
1055    struct dirent *d;
1056    while ((d = readdir(proc))) {
1057        int pid = atoi(d->d_name);
1058        if (pid <= 0) continue;
1059
1060        char path[PATH_MAX];
1061        char data[PATH_MAX];
1062        snprintf(path, sizeof(path), "/proc/%d/exe", pid);
1063        ssize_t len = readlink(path, data, sizeof(data) - 1);
1064        if (len <= 0) {
1065            continue;
1066        }
1067        data[len] = '\0';
1068
1069        if (!strncmp(data, "/system/bin/app_process", strlen("/system/bin/app_process"))) {
1070            /* skip zygote -- it won't dump its stack anyway */
1071            snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
1072            int cfd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC));
1073            len = read(cfd, data, sizeof(data) - 1);
1074            close(cfd);
1075            if (len <= 0) {
1076                continue;
1077            }
1078            data[len] = '\0';
1079            if (!strncmp(data, "zygote", strlen("zygote"))) {
1080                continue;
1081            }
1082
1083            ++dalvik_found;
1084            uint64_t start = DurationReporter::nanotime();
1085            if (kill(pid, SIGQUIT)) {
1086                MYLOGE("kill(%d, SIGQUIT): %s\n", pid, strerror(errno));
1087                continue;
1088            }
1089
1090            /* wait for the writable-close notification from inotify */
1091            struct pollfd pfd = { ifd, POLLIN, 0 };
1092            int ret = poll(&pfd, 1, 5000);  /* 5 sec timeout */
1093            if (ret < 0) {
1094                MYLOGE("poll: %s\n", strerror(errno));
1095            } else if (ret == 0) {
1096                MYLOGE("warning: timed out dumping pid %d\n", pid);
1097            } else {
1098                struct inotify_event ie;
1099                read(ifd, &ie, sizeof(ie));
1100            }
1101
1102            if (lseek(fd, 0, SEEK_END) < 0) {
1103                MYLOGE("lseek: %s\n", strerror(errno));
1104            } else {
1105                dprintf(fd, "[dump dalvik stack %d: %.3fs elapsed]\n",
1106                        pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC);
1107            }
1108        } else if (should_dump_native_traces(data)) {
1109            /* dump native process if appropriate */
1110            if (lseek(fd, 0, SEEK_END) < 0) {
1111                MYLOGE("lseek: %s\n", strerror(errno));
1112            } else {
1113                static uint16_t timeout_failures = 0;
1114                uint64_t start = DurationReporter::nanotime();
1115
1116                /* If 3 backtrace dumps fail in a row, consider debuggerd dead. */
1117                if (timeout_failures == 3) {
1118                    dprintf(fd, "too many stack dump failures, skipping...\n");
1119                } else if (dump_backtrace_to_file_timeout(pid, fd, 20) == -1) {
1120                    dprintf(fd, "dumping failed, likely due to a timeout\n");
1121                    timeout_failures++;
1122                } else {
1123                    timeout_failures = 0;
1124                }
1125                dprintf(fd, "[dump native stack %d: %.3fs elapsed]\n",
1126                        pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC);
1127            }
1128        }
1129    }
1130
1131    if (dalvik_found == 0) {
1132        MYLOGE("Warning: no Dalvik processes found to dump stacks\n");
1133    }
1134
1135    static char dump_traces_path[PATH_MAX];
1136    strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path));
1137    strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path));
1138    if (rename(traces_path, dump_traces_path)) {
1139        MYLOGE("rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno));
1140        goto error_close_ifd;
1141    }
1142    result = dump_traces_path;
1143
1144    /* replace the saved [ANR] traces.txt file */
1145    rename(anr_traces_path, traces_path);
1146
1147error_close_ifd:
1148    close(ifd);
1149error_close_fd:
1150    close(fd);
1151    return result;
1152}
1153
1154void dump_route_tables() {
1155    DurationReporter duration_reporter("DUMP ROUTE TABLES");
1156    ON_DRY_RUN_RETURN();
1157    const char* const RT_TABLES_PATH = "/data/misc/net/rt_tables";
1158    dump_file("RT_TABLES", RT_TABLES_PATH);
1159    FILE* fp = fopen(RT_TABLES_PATH, "re");
1160    if (!fp) {
1161        printf("*** %s: %s\n", RT_TABLES_PATH, strerror(errno));
1162        return;
1163    }
1164    char table[16];
1165    // Each line has an integer (the table number), a space, and a string (the table name). We only
1166    // need the table number. It's a 32-bit unsigned number, so max 10 chars. Skip the table name.
1167    // Add a fixed max limit so this doesn't go awry.
1168    for (int i = 0; i < 64 && fscanf(fp, " %10s %*s", table) == 1; ++i) {
1169        run_command("ROUTE TABLE IPv4", 10, "ip", "-4", "route", "show", "table", table, NULL);
1170        run_command("ROUTE TABLE IPv6", 10, "ip", "-6", "route", "show", "table", table, NULL);
1171    }
1172    fclose(fp);
1173}
1174
1175/* overall progress */
1176int progress = 0;
1177int do_update_progress = 0; // Set by dumpstate.cpp
1178int weight_total = WEIGHT_TOTAL;
1179
1180// TODO: make this function thread safe if sections are generated in parallel.
1181void update_progress(int delta) {
1182    if (!do_update_progress) return;
1183
1184    progress += delta;
1185
1186    char key[PROPERTY_KEY_MAX];
1187    char value[PROPERTY_VALUE_MAX];
1188
1189    // adjusts max on the fly
1190    if (progress > weight_total) {
1191        int new_total = weight_total * 1.2;
1192        MYLOGD("Adjusting total weight from %d to %d\n", weight_total, new_total);
1193        weight_total = new_total;
1194        snprintf(key, sizeof(key), "dumpstate.%d.max", getpid());
1195        snprintf(value, sizeof(value), "%d", weight_total);
1196        int status = property_set(key, value);
1197        if (status) {
1198            MYLOGE("Could not update max weight by setting system property %s to %s: %d\n",
1199                    key, value, status);
1200        }
1201    }
1202
1203    snprintf(key, sizeof(key), "dumpstate.%d.progress", getpid());
1204    snprintf(value, sizeof(value), "%d", progress);
1205
1206    if (progress % 100 == 0) {
1207        // We don't want to spam logcat, so only log multiples of 100.
1208        MYLOGD("Setting progress (%s): %s/%d\n", key, value, weight_total);
1209    } else {
1210        // stderr is ignored on normal invocations, but useful when calling /system/bin/dumpstate
1211        // directly for debuggging.
1212        fprintf(stderr, "Setting progress (%s): %s/%d\n", key, value, weight_total);
1213    }
1214
1215    int status = property_set(key, value);
1216    if (status) {
1217        MYLOGE("Could not update progress by setting system property %s to %s: %d\n",
1218                key, value, status);
1219    }
1220}
1221
1222void take_screenshot(const std::string& path) {
1223    const char *args[] = { "/system/bin/screencap", "-p", path.c_str(), NULL };
1224    run_command_always(NULL, DONT_DROP_ROOT, REDIRECT_TO_STDERR, 10, args);
1225}
1226
1227void vibrate(FILE* vibrator, int ms) {
1228    fprintf(vibrator, "%d\n", ms);
1229    fflush(vibrator);
1230}
1231
1232bool is_dir(const char* pathname) {
1233    struct stat info;
1234    if (stat(pathname, &info) == -1) {
1235        return false;
1236    }
1237    return S_ISDIR(info.st_mode);
1238}
1239
1240time_t get_mtime(int fd, time_t default_mtime) {
1241    struct stat info;
1242    if (fstat(fd, &info) == -1) {
1243        return default_mtime;
1244    }
1245    return info.st_mtime;
1246}
1247
1248void dump_emmc_ecsd(const char *ext_csd_path) {
1249    static const size_t EXT_CSD_REV = 192;
1250    static const size_t EXT_PRE_EOL_INFO = 267;
1251    static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_A = 268;
1252    static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_B = 269;
1253    struct hex {
1254        char str[2];
1255    } buffer[512];
1256    int fd, ext_csd_rev, ext_pre_eol_info;
1257    ssize_t bytes_read;
1258    static const char *ver_str[] = {
1259        "4.0", "4.1", "4.2", "4.3", "Obsolete", "4.41", "4.5", "5.0"
1260    };
1261    static const char *eol_str[] = {
1262        "Undefined",
1263        "Normal",
1264        "Warning (consumed 80% of reserve)",
1265        "Urgent (consumed 90% of reserve)"
1266    };
1267
1268    printf("------ %s Extended CSD ------\n", ext_csd_path);
1269
1270    fd = TEMP_FAILURE_RETRY(open(ext_csd_path,
1271                                 O_RDONLY | O_NONBLOCK | O_CLOEXEC));
1272    if (fd < 0) {
1273        printf("*** %s: %s\n\n", ext_csd_path, strerror(errno));
1274        return;
1275    }
1276
1277    bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer)));
1278    close(fd);
1279    if (bytes_read < 0) {
1280        printf("*** %s: %s\n\n", ext_csd_path, strerror(errno));
1281        return;
1282    }
1283    if (bytes_read < (ssize_t)(EXT_CSD_REV * sizeof(struct hex))) {
1284        printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read);
1285        return;
1286    }
1287
1288    ext_csd_rev = 0;
1289    if (sscanf(buffer[EXT_CSD_REV].str, "%02x", &ext_csd_rev) != 1) {
1290        printf("*** %s: EXT_CSD_REV parse error \"%.2s\"\n\n",
1291               ext_csd_path, buffer[EXT_CSD_REV].str);
1292        return;
1293    }
1294
1295    printf("rev 1.%d (MMC %s)\n",
1296           ext_csd_rev,
1297           (ext_csd_rev < (int)(sizeof(ver_str) / sizeof(ver_str[0]))) ?
1298               ver_str[ext_csd_rev] :
1299               "Unknown");
1300    if (ext_csd_rev < 7) {
1301        printf("\n");
1302        return;
1303    }
1304
1305    if (bytes_read < (ssize_t)(EXT_PRE_EOL_INFO * sizeof(struct hex))) {
1306        printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read);
1307        return;
1308    }
1309
1310    ext_pre_eol_info = 0;
1311    if (sscanf(buffer[EXT_PRE_EOL_INFO].str, "%02x", &ext_pre_eol_info) != 1) {
1312        printf("*** %s: PRE_EOL_INFO parse error \"%.2s\"\n\n",
1313               ext_csd_path, buffer[EXT_PRE_EOL_INFO].str);
1314        return;
1315    }
1316    printf("PRE_EOL_INFO %d (MMC %s)\n",
1317           ext_pre_eol_info,
1318           eol_str[(ext_pre_eol_info < (int)
1319                       (sizeof(eol_str) / sizeof(eol_str[0]))) ?
1320                           ext_pre_eol_info : 0]);
1321
1322    for (size_t lifetime = EXT_DEVICE_LIFE_TIME_EST_TYP_A;
1323            lifetime <= EXT_DEVICE_LIFE_TIME_EST_TYP_B;
1324            ++lifetime) {
1325        int ext_device_life_time_est;
1326        static const char *est_str[] = {
1327            "Undefined",
1328            "0-10% of device lifetime used",
1329            "10-20% of device lifetime used",
1330            "20-30% of device lifetime used",
1331            "30-40% of device lifetime used",
1332            "40-50% of device lifetime used",
1333            "50-60% of device lifetime used",
1334            "60-70% of device lifetime used",
1335            "70-80% of device lifetime used",
1336            "80-90% of device lifetime used",
1337            "90-100% of device lifetime used",
1338            "Exceeded the maximum estimated device lifetime",
1339        };
1340
1341        if (bytes_read < (ssize_t)(lifetime * sizeof(struct hex))) {
1342            printf("*** %s: truncated content %zd\n", ext_csd_path, bytes_read);
1343            break;
1344        }
1345
1346        ext_device_life_time_est = 0;
1347        if (sscanf(buffer[lifetime].str, "%02x", &ext_device_life_time_est) != 1) {
1348            printf("*** %s: DEVICE_LIFE_TIME_EST_TYP_%c parse error \"%.2s\"\n",
1349                   ext_csd_path,
1350                   (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A',
1351                   buffer[lifetime].str);
1352            continue;
1353        }
1354        printf("DEVICE_LIFE_TIME_EST_TYP_%c %d (MMC %s)\n",
1355               (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A',
1356               ext_device_life_time_est,
1357               est_str[(ext_device_life_time_est < (int)
1358                           (sizeof(est_str) / sizeof(est_str[0]))) ?
1359                               ext_device_life_time_est : 0]);
1360    }
1361
1362    printf("\n");
1363}
1364
1365// TODO: refactor all those commands that convert args
1366void format_args(int argc, const char *argv[], std::string *args) {
1367    LOG_ALWAYS_FATAL_IF(args == nullptr);
1368    for (int i = 0; i < argc; i++) {
1369        args->append(argv[i]);
1370        if (i < argc -1) {
1371          args->append(" ");
1372        }
1373    }
1374}
1375void format_args(const char* command, const char *args[], std::string *string) {
1376    LOG_ALWAYS_FATAL_IF(args == nullptr || command == nullptr);
1377    string->append(command);
1378    if (args[0] == nullptr) return;
1379    string->append(" ");
1380
1381    for (int arg = 1; arg <= 1000; ++arg) {
1382        if (args[arg] == nullptr) return;
1383        string->append(args[arg]);
1384        if (args[arg+1] != nullptr) {
1385            string->append(" ");
1386        }
1387    }
1388    // TODO: not really working: if NULL is missing, it will crash dumpstate.
1389    MYLOGE("internal error: missing NULL entry on %s", string->c_str());
1390}
1391