dumpstate.cpp revision ecc0763e6c96c418ea4ee6c993d58d16a58407b3 
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 <stdbool.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/capability.h>
26#include <sys/prctl.h>
27#include <sys/resource.h>
28#include <sys/stat.h>
29#include <sys/time.h>
30#include <sys/wait.h>
31#include <unistd.h>
32
33#include <cutils/properties.h>
34
35#include "private/android_filesystem_config.h"
36
37#define LOG_TAG "dumpstate"
38#include <cutils/log.h>
39
40#include "dumpstate.h"
41
42/* read before root is shed */
43static char cmdline_buf[16384] = "(unknown)";
44static const char *dump_traces_path = NULL;
45
46static char screenshot_path[PATH_MAX] = "";
47
48#define PSTORE_LAST_KMSG "/sys/fs/pstore/console-ramoops"
49
50#define TOMBSTONE_DIR "/data/tombstones"
51#define TOMBSTONE_FILE_PREFIX TOMBSTONE_DIR "/tombstone_"
52/* Can accomodate a tombstone number up to 9999. */
53#define TOMBSTONE_MAX_LEN (sizeof(TOMBSTONE_FILE_PREFIX) + 4)
54#define NUM_TOMBSTONES  10
55
56typedef struct {
57  char name[TOMBSTONE_MAX_LEN];
58  int fd;
59} tombstone_data_t;
60
61static tombstone_data_t tombstone_data[NUM_TOMBSTONES];
62
63/* Get the fds of any tombstone that was modified in the last half an hour. */
64static void get_tombstone_fds(tombstone_data_t data[NUM_TOMBSTONES]) {
65    time_t thirty_minutes_ago = time(NULL) - 60*30;
66    for (size_t i = 0; i < NUM_TOMBSTONES; i++) {
67        snprintf(data[i].name, sizeof(data[i].name), "%s%02zu", TOMBSTONE_FILE_PREFIX, i);
68        int fd = TEMP_FAILURE_RETRY(open(data[i].name,
69                                         O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK));
70        struct stat st;
71        if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode) &&
72                (time_t) st.st_mtime >= thirty_minutes_ago) {
73            data[i].fd = fd;
74        } else {
75            close(fd);
76            data[i].fd = -1;
77        }
78    }
79}
80
81static void dump_dev_files(const char *title, const char *driverpath, const char *filename)
82{
83    DIR *d;
84    struct dirent *de;
85    char path[PATH_MAX];
86
87    d = opendir(driverpath);
88    if (d == NULL) {
89        return;
90    }
91
92    while ((de = readdir(d))) {
93        if (de->d_type != DT_LNK) {
94            continue;
95        }
96        snprintf(path, sizeof(path), "%s/%s/%s", driverpath, de->d_name, filename);
97        dump_file(title, path);
98    }
99
100    closedir(d);
101}
102
103static bool skip_not_stat(const char *path) {
104    static const char stat[] = "/stat";
105    size_t len = strlen(path);
106    if (path[len - 1] == '/') { /* Directory? */
107        return false;
108    }
109    return strcmp(path + len - sizeof(stat) + 1, stat); /* .../stat? */
110}
111
112static const char mmcblk0[] = "/sys/block/mmcblk0/";
113unsigned long worst_write_perf = 20000; /* in KB/s */
114
115static int dump_stat_from_fd(const char *title __unused, const char *path, int fd) {
116    unsigned long fields[11], read_perf, write_perf;
117    bool z;
118    char *cp, *buffer = NULL;
119    size_t i = 0;
120    FILE *fp = fdopen(fd, "rb");
121    getline(&buffer, &i, fp);
122    fclose(fp);
123    if (!buffer) {
124        return -errno;
125    }
126    i = strlen(buffer);
127    while ((i > 0) && (buffer[i - 1] == '\n')) {
128        buffer[--i] = '\0';
129    }
130    if (!*buffer) {
131        free(buffer);
132        return 0;
133    }
134    z = true;
135    for (cp = buffer, i = 0; i < (sizeof(fields) / sizeof(fields[0])); ++i) {
136        fields[i] = strtol(cp, &cp, 0);
137        if (fields[i] != 0) {
138            z = false;
139        }
140    }
141    if (z) { /* never accessed */
142        free(buffer);
143        return 0;
144    }
145
146    if (!strncmp(path, mmcblk0, sizeof(mmcblk0) - 1)) {
147        path += sizeof(mmcblk0) - 1;
148    }
149
150    printf("%s: %s\n", path, buffer);
151    free(buffer);
152
153    read_perf = 0;
154    if (fields[3]) {
155        read_perf = 512 * fields[2] / fields[3];
156    }
157    write_perf = 0;
158    if (fields[7]) {
159        write_perf = 512 * fields[6] / fields[7];
160    }
161    printf("%s: read: %luKB/s write: %luKB/s\n", path, read_perf, write_perf);
162    if ((write_perf > 1) && (write_perf < worst_write_perf)) {
163        worst_write_perf = write_perf;
164    }
165    return 0;
166}
167
168/* Copied policy from system/core/logd/LogBuffer.cpp */
169
170#define LOG_BUFFER_SIZE (256 * 1024)
171#define LOG_BUFFER_MIN_SIZE (64 * 1024UL)
172#define LOG_BUFFER_MAX_SIZE (256 * 1024 * 1024UL)
173
174static bool valid_size(unsigned long value) {
175    if ((value < LOG_BUFFER_MIN_SIZE) || (LOG_BUFFER_MAX_SIZE < value)) {
176        return false;
177    }
178
179    long pages = sysconf(_SC_PHYS_PAGES);
180    if (pages < 1) {
181        return true;
182    }
183
184    long pagesize = sysconf(_SC_PAGESIZE);
185    if (pagesize <= 1) {
186        pagesize = PAGE_SIZE;
187    }
188
189    // maximum memory impact a somewhat arbitrary ~3%
190    pages = (pages + 31) / 32;
191    unsigned long maximum = pages * pagesize;
192
193    if ((maximum < LOG_BUFFER_MIN_SIZE) || (LOG_BUFFER_MAX_SIZE < maximum)) {
194        return true;
195    }
196
197    return value <= maximum;
198}
199
200static unsigned long property_get_size(const char *key) {
201    unsigned long value;
202    char *cp, property[PROPERTY_VALUE_MAX];
203
204    property_get(key, property, "");
205    value = strtoul(property, &cp, 10);
206
207    switch(*cp) {
208    case 'm':
209    case 'M':
210        value *= 1024;
211    /* FALLTHRU */
212    case 'k':
213    case 'K':
214        value *= 1024;
215    /* FALLTHRU */
216    case '\0':
217        break;
218
219    default:
220        value = 0;
221    }
222
223    if (!valid_size(value)) {
224        value = 0;
225    }
226
227    return value;
228}
229
230/* timeout in ms */
231static unsigned long logcat_timeout(char *name) {
232    static const char global_tuneable[] = "persist.logd.size"; // Settings App
233    static const char global_default[] = "ro.logd.size";       // BoardConfig.mk
234    char key[PROP_NAME_MAX];
235    unsigned long property_size, default_size;
236
237    default_size = property_get_size(global_tuneable);
238    if (!default_size) {
239        default_size = property_get_size(global_default);
240    }
241
242    snprintf(key, sizeof(key), "%s.%s", global_tuneable, name);
243    property_size = property_get_size(key);
244
245    if (!property_size) {
246        snprintf(key, sizeof(key), "%s.%s", global_default, name);
247        property_size = property_get_size(key);
248    }
249
250    if (!property_size) {
251        property_size = default_size;
252    }
253
254    if (!property_size) {
255        property_size = LOG_BUFFER_SIZE;
256    }
257
258    /* Engineering margin is ten-fold our guess */
259    return 10 * (property_size + worst_write_perf) / worst_write_perf;
260}
261
262/* End copy from system/core/logd/LogBuffer.cpp */
263
264/* dumps the current system state to stdout */
265static void dumpstate() {
266    unsigned long timeout;
267    time_t now = time(NULL);
268    char build[PROPERTY_VALUE_MAX], fingerprint[PROPERTY_VALUE_MAX];
269    char radio[PROPERTY_VALUE_MAX], bootloader[PROPERTY_VALUE_MAX];
270    char network[PROPERTY_VALUE_MAX], date[80];
271    char build_type[PROPERTY_VALUE_MAX];
272
273    property_get("ro.build.display.id", build, "(unknown)");
274    property_get("ro.build.fingerprint", fingerprint, "(unknown)");
275    property_get("ro.build.type", build_type, "(unknown)");
276    property_get("ro.baseband", radio, "(unknown)");
277    property_get("ro.bootloader", bootloader, "(unknown)");
278    property_get("gsm.operator.alpha", network, "(unknown)");
279    strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", localtime(&now));
280
281    printf("========================================================\n");
282    printf("== dumpstate: %s\n", date);
283    printf("========================================================\n");
284
285    printf("\n");
286    printf("Build: %s\n", build);
287    printf("Build fingerprint: '%s'\n", fingerprint); /* format is important for other tools */
288    printf("Bootloader: %s\n", bootloader);
289    printf("Radio: %s\n", radio);
290    printf("Network: %s\n", network);
291
292    printf("Kernel: ");
293    dump_file(NULL, "/proc/version");
294    printf("Command line: %s\n", strtok(cmdline_buf, "\n"));
295    printf("\n");
296
297    dump_dev_files("TRUSTY VERSION", "/sys/bus/platform/drivers/trusty", "trusty_version");
298    run_command("UPTIME", 10, "uptime", NULL);
299    dump_files("UPTIME MMC PERF", mmcblk0, skip_not_stat, dump_stat_from_fd);
300    dump_file("MEMORY INFO", "/proc/meminfo");
301    run_command("CPU INFO", 10, "top", "-n", "1", "-d", "1", "-m", "30", "-t", NULL);
302    run_command("PROCRANK", 20, "procrank", NULL);
303    dump_file("VIRTUAL MEMORY STATS", "/proc/vmstat");
304    dump_file("VMALLOC INFO", "/proc/vmallocinfo");
305    dump_file("SLAB INFO", "/proc/slabinfo");
306    dump_file("ZONEINFO", "/proc/zoneinfo");
307    dump_file("PAGETYPEINFO", "/proc/pagetypeinfo");
308    dump_file("BUDDYINFO", "/proc/buddyinfo");
309    dump_file("FRAGMENTATION INFO", "/d/extfrag/unusable_index");
310
311    dump_file("KERNEL WAKELOCKS", "/proc/wakelocks");
312    dump_file("KERNEL WAKE SOURCES", "/d/wakeup_sources");
313    dump_file("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");
314    dump_file("KERNEL SYNC", "/d/sync");
315
316    run_command("PROCESSES", 10, "ps", "-P", NULL);
317    run_command("PROCESSES AND THREADS", 10, "ps", "-t", "-p", "-P", NULL);
318    run_command("PROCESSES (SELINUX LABELS)", 10, "ps", "-Z", NULL);
319    run_command("LIBRANK", 10, "librank", NULL);
320
321    do_dmesg();
322
323    run_command("LIST OF OPEN FILES", 10, SU_PATH, "root", "lsof", NULL);
324    for_each_pid(do_showmap, "SMAPS OF ALL PROCESSES");
325    for_each_tid(show_wchan, "BLOCKED PROCESS WAIT-CHANNELS");
326
327    if (screenshot_path[0]) {
328        ALOGI("taking screenshot\n");
329        run_command(NULL, 10, "/system/bin/screencap", "-p", screenshot_path, NULL);
330        ALOGI("wrote screenshot: %s\n", screenshot_path);
331    }
332
333    // dump_file("EVENT LOG TAGS", "/etc/event-log-tags");
334    // calculate timeout
335    timeout = logcat_timeout("main") + logcat_timeout("system") + logcat_timeout("crash");
336    if (timeout < 20000) {
337        timeout = 20000;
338    }
339    run_command("SYSTEM LOG", timeout / 1000, "logcat", "-v", "threadtime", "-d", "*:v", NULL);
340    timeout = logcat_timeout("events");
341    if (timeout < 20000) {
342        timeout = 20000;
343    }
344    run_command("EVENT LOG", timeout / 1000, "logcat", "-b", "events", "-v", "threadtime", "-d", "*:v", NULL);
345    timeout = logcat_timeout("radio");
346    if (timeout < 20000) {
347        timeout = 20000;
348    }
349    run_command("RADIO LOG", timeout / 1000, "logcat", "-b", "radio", "-v", "threadtime", "-d", "*:v", NULL);
350
351    run_command("LOG STATISTICS", 10, "logcat", "-b", "all", "-S", NULL);
352
353    /* show the traces we collected in main(), if that was done */
354    if (dump_traces_path != NULL) {
355        dump_file("VM TRACES JUST NOW", dump_traces_path);
356    }
357
358    /* only show ANR traces if they're less than 15 minutes old */
359    struct stat st;
360    char anr_traces_path[PATH_MAX];
361    property_get("dalvik.vm.stack-trace-file", anr_traces_path, "");
362    if (!anr_traces_path[0]) {
363        printf("*** NO VM TRACES FILE DEFINED (dalvik.vm.stack-trace-file)\n\n");
364    } else {
365      int fd = TEMP_FAILURE_RETRY(open(anr_traces_path,
366                                       O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK));
367      if (fd < 0) {
368          printf("*** NO ANR VM TRACES FILE (%s): %s\n\n", anr_traces_path, strerror(errno));
369      } else {
370          dump_file_from_fd("VM TRACES AT LAST ANR", anr_traces_path, fd);
371      }
372    }
373
374    /* slow traces for slow operations */
375    if (anr_traces_path[0] != 0) {
376        int tail = strlen(anr_traces_path)-1;
377        while (tail > 0 && anr_traces_path[tail] != '/') {
378            tail--;
379        }
380        int i = 0;
381        while (1) {
382            sprintf(anr_traces_path+tail+1, "slow%02d.txt", i);
383            if (stat(anr_traces_path, &st)) {
384                // No traces file at this index, done with the files.
385                break;
386            }
387            dump_file("VM TRACES WHEN SLOW", anr_traces_path);
388            i++;
389        }
390    }
391
392    int dumped = 0;
393    for (size_t i = 0; i < NUM_TOMBSTONES; i++) {
394        if (tombstone_data[i].fd != -1) {
395            dumped = 1;
396            dump_file_from_fd("TOMBSTONE", tombstone_data[i].name, tombstone_data[i].fd);
397            tombstone_data[i].fd = -1;
398        }
399    }
400    if (!dumped) {
401        printf("*** NO TOMBSTONES to dump in %s\n\n", TOMBSTONE_DIR);
402    }
403
404    dump_file("NETWORK DEV INFO", "/proc/net/dev");
405    dump_file("QTAGUID NETWORK INTERFACES INFO", "/proc/net/xt_qtaguid/iface_stat_all");
406    dump_file("QTAGUID NETWORK INTERFACES INFO (xt)", "/proc/net/xt_qtaguid/iface_stat_fmt");
407    dump_file("QTAGUID CTRL INFO", "/proc/net/xt_qtaguid/ctrl");
408    dump_file("QTAGUID STATS INFO", "/proc/net/xt_qtaguid/stats");
409
410    if (!stat(PSTORE_LAST_KMSG, &st)) {
411        /* Also TODO: Make console-ramoops CAP_SYSLOG protected. */
412        dump_file("LAST KMSG", PSTORE_LAST_KMSG);
413    } else {
414        /* TODO: Make last_kmsg CAP_SYSLOG protected. b/5555691 */
415        dump_file("LAST KMSG", "/proc/last_kmsg");
416    }
417
418    /* kernels must set CONFIG_PSTORE_PMSG, slice up pstore with device tree */
419    run_command("LAST LOGCAT", 10, "logcat", "-L", "-v", "threadtime",
420                                             "-b", "all", "-d", "*:v", NULL);
421
422    /* The following have a tendency to get wedged when wifi drivers/fw goes belly-up. */
423
424    run_command("NETWORK INTERFACES", 10, "ip", "link", NULL);
425
426    run_command("IPv4 ADDRESSES", 10, "ip", "-4", "addr", "show", NULL);
427    run_command("IPv6 ADDRESSES", 10, "ip", "-6", "addr", "show", NULL);
428
429    run_command("IP RULES", 10, "ip", "rule", "show", NULL);
430    run_command("IP RULES v6", 10, "ip", "-6", "rule", "show", NULL);
431
432    dump_route_tables();
433
434    run_command("ARP CACHE", 10, "ip", "-4", "neigh", "show", NULL);
435    run_command("IPv6 ND CACHE", 10, "ip", "-6", "neigh", "show", NULL);
436
437    run_command("NETWORK DIAGNOSTICS", 10, "dumpsys", "connectivity", "--diag", NULL);
438
439    run_command("IPTABLES", 10, SU_PATH, "root", "iptables", "-L", "-nvx", NULL);
440    run_command("IP6TABLES", 10, SU_PATH, "root", "ip6tables", "-L", "-nvx", NULL);
441    run_command("IPTABLE NAT", 10, SU_PATH, "root", "iptables", "-t", "nat", "-L", "-nvx", NULL);
442    /* no ip6 nat */
443    run_command("IPTABLE RAW", 10, SU_PATH, "root", "iptables", "-t", "raw", "-L", "-nvx", NULL);
444    run_command("IP6TABLE RAW", 10, SU_PATH, "root", "ip6tables", "-t", "raw", "-L", "-nvx", NULL);
445
446    run_command("WIFI NETWORKS", 20,
447            SU_PATH, "root", "wpa_cli", "IFNAME=wlan0", "list_networks", NULL);
448
449#ifdef FWDUMP_bcmdhd
450    run_command("DUMP WIFI INTERNAL COUNTERS", 20,
451            SU_PATH, "root", "wlutil", "counters", NULL);
452#endif
453    dump_file("INTERRUPTS (1)", "/proc/interrupts");
454
455    property_get("dhcp.wlan0.gateway", network, "");
456    if (network[0])
457        run_command("PING GATEWAY", 10, "ping", "-c", "3", "-i", ".5", network, NULL);
458    property_get("dhcp.wlan0.dns1", network, "");
459    if (network[0])
460        run_command("PING DNS1", 10, "ping", "-c", "3", "-i", ".5", network, NULL);
461    property_get("dhcp.wlan0.dns2", network, "");
462    if (network[0])
463        run_command("PING DNS2", 10, "ping", "-c", "3", "-i", ".5", network, NULL);
464#ifdef FWDUMP_bcmdhd
465    run_command("DUMP WIFI STATUS", 20,
466            SU_PATH, "root", "dhdutil", "-i", "wlan0", "dump", NULL);
467    run_command("DUMP WIFI INTERNAL COUNTERS", 20,
468            SU_PATH, "root", "wlutil", "counters", NULL);
469#endif
470    dump_file("INTERRUPTS (2)", "/proc/interrupts");
471
472    print_properties();
473
474    run_command("VOLD DUMP", 10, "vdc", "dump", NULL);
475    run_command("SECURE CONTAINERS", 10, "vdc", "asec", "list", NULL);
476
477    run_command("FILESYSTEMS & FREE SPACE", 10, "df", NULL);
478
479    run_command("LAST RADIO LOG", 10, "parse_radio_log", "/proc/last_radio_log", NULL);
480
481    printf("------ BACKLIGHTS ------\n");
482    printf("LCD brightness=");
483    dump_file(NULL, "/sys/class/leds/lcd-backlight/brightness");
484    printf("Button brightness=");
485    dump_file(NULL, "/sys/class/leds/button-backlight/brightness");
486    printf("Keyboard brightness=");
487    dump_file(NULL, "/sys/class/leds/keyboard-backlight/brightness");
488    printf("ALS mode=");
489    dump_file(NULL, "/sys/class/leds/lcd-backlight/als");
490    printf("LCD driver registers:\n");
491    dump_file(NULL, "/sys/class/leds/lcd-backlight/registers");
492    printf("\n");
493
494    /* Binder state is expensive to look at as it uses a lot of memory. */
495    dump_file("BINDER FAILED TRANSACTION LOG", "/sys/kernel/debug/binder/failed_transaction_log");
496    dump_file("BINDER TRANSACTION LOG", "/sys/kernel/debug/binder/transaction_log");
497    dump_file("BINDER TRANSACTIONS", "/sys/kernel/debug/binder/transactions");
498    dump_file("BINDER STATS", "/sys/kernel/debug/binder/stats");
499    dump_file("BINDER STATE", "/sys/kernel/debug/binder/state");
500
501    printf("========================================================\n");
502    printf("== Board\n");
503    printf("========================================================\n");
504
505    dumpstate_board();
506    printf("\n");
507
508    /* Migrate the ril_dumpstate to a dumpstate_board()? */
509    char ril_dumpstate_timeout[PROPERTY_VALUE_MAX] = {0};
510    property_get("ril.dumpstate.timeout", ril_dumpstate_timeout, "30");
511    if (strnlen(ril_dumpstate_timeout, PROPERTY_VALUE_MAX - 1) > 0) {
512        if (0 == strncmp(build_type, "user", PROPERTY_VALUE_MAX - 1)) {
513            // su does not exist on user builds, so try running without it.
514            // This way any implementations of vril-dump that do not require
515            // root can run on user builds.
516            run_command("DUMP VENDOR RIL LOGS", atoi(ril_dumpstate_timeout),
517                    "vril-dump", NULL);
518        } else {
519            run_command("DUMP VENDOR RIL LOGS", atoi(ril_dumpstate_timeout),
520                    SU_PATH, "root", "vril-dump", NULL);
521        }
522    }
523
524    printf("========================================================\n");
525    printf("== Android Framework Services\n");
526    printf("========================================================\n");
527
528    /* the full dumpsys is starting to take a long time, so we need
529       to increase its timeout.  we really need to do the timeouts in
530       dumpsys itself... */
531    run_command("DUMPSYS", 60, "dumpsys", NULL);
532
533    printf("========================================================\n");
534    printf("== Checkins\n");
535    printf("========================================================\n");
536
537    run_command("CHECKIN BATTERYSTATS", 30, "dumpsys", "batterystats", "-c", NULL);
538    run_command("CHECKIN MEMINFO", 30, "dumpsys", "meminfo", "--checkin", NULL);
539    run_command("CHECKIN NETSTATS", 30, "dumpsys", "netstats", "--checkin", NULL);
540    run_command("CHECKIN PROCSTATS", 30, "dumpsys", "procstats", "-c", NULL);
541    run_command("CHECKIN USAGESTATS", 30, "dumpsys", "usagestats", "-c", NULL);
542    run_command("CHECKIN PACKAGE", 30, "dumpsys", "package", "--checkin", NULL);
543
544    printf("========================================================\n");
545    printf("== Running Application Activities\n");
546    printf("========================================================\n");
547
548    run_command("APP ACTIVITIES", 30, "dumpsys", "activity", "all", NULL);
549
550    printf("========================================================\n");
551    printf("== Running Application Services\n");
552    printf("========================================================\n");
553
554    run_command("APP SERVICES", 30, "dumpsys", "activity", "service", "all", NULL);
555
556    printf("========================================================\n");
557    printf("== Running Application Providers\n");
558    printf("========================================================\n");
559
560    run_command("APP SERVICES", 30, "dumpsys", "activity", "provider", "all", NULL);
561
562
563    printf("========================================================\n");
564    printf("== dumpstate: done\n");
565    printf("========================================================\n");
566}
567
568static void usage() {
569    fprintf(stderr, "usage: dumpstate [-b soundfile] [-e soundfile] [-o file [-d] [-p] [-z]] [-s] [-q]\n"
570            "  -o: write to file (instead of stdout)\n"
571            "  -d: append date to filename (requires -o)\n"
572            "  -p: capture screenshot to filename.png (requires -o)\n"
573            "  -s: write output to control socket (for init)\n"
574            "  -b: play sound file instead of vibrate, at beginning of job\n"
575            "  -e: play sound file instead of vibrate, at end of job\n"
576            "  -q: disable vibrate\n"
577            "  -B: send broadcast when finished (requires -o and -p)\n"
578                );
579}
580
581static void sigpipe_handler(int n) {
582    // don't complain to stderr or stdout
583    _exit(EXIT_FAILURE);
584}
585
586static void vibrate(FILE* vibrator, int ms) {
587    fprintf(vibrator, "%d\n", ms);
588    fflush(vibrator);
589}
590
591int main(int argc, char *argv[]) {
592    struct sigaction sigact;
593    int do_add_date = 0;
594    int do_vibrate = 1;
595    char* use_outfile = 0;
596    int use_socket = 0;
597    int do_fb = 0;
598    int do_broadcast = 0;
599
600    if (getuid() != 0) {
601        // Old versions of the adb client would call the
602        // dumpstate command directly. Newer clients
603        // call /system/bin/bugreport instead. If we detect
604        // we're being called incorrectly, then exec the
605        // correct program.
606        return execl("/system/bin/bugreport", "/system/bin/bugreport", NULL);
607    }
608
609    ALOGI("begin\n");
610
611    /* clear SIGPIPE handler */
612    memset(&sigact, 0, sizeof(sigact));
613    sigact.sa_handler = sigpipe_handler;
614    sigaction(SIGPIPE, &sigact, NULL);
615
616    /* set as high priority, and protect from OOM killer */
617    setpriority(PRIO_PROCESS, 0, -20);
618    FILE *oom_adj = fopen("/proc/self/oom_adj", "we");
619    if (oom_adj) {
620        fputs("-17", oom_adj);
621        fclose(oom_adj);
622    }
623
624    /* parse arguments */
625    int c;
626    while ((c = getopt(argc, argv, "dho:svqzpB")) != -1) {
627        switch (c) {
628            case 'd': do_add_date = 1;       break;
629            case 'o': use_outfile = optarg;  break;
630            case 's': use_socket = 1;        break;
631            case 'v': break;  // compatibility no-op
632            case 'q': do_vibrate = 0;        break;
633            case 'p': do_fb = 1;             break;
634            case 'B': do_broadcast = 1;      break;
635            case '?': printf("\n");
636            case 'h':
637                usage();
638                exit(1);
639        }
640    }
641
642    // If we are going to use a socket, do it as early as possible
643    // to avoid timeouts from bugreport.
644    if (use_socket) {
645        redirect_to_socket(stdout, "dumpstate");
646    }
647
648    /* open the vibrator before dropping root */
649    FILE *vibrator = 0;
650    if (do_vibrate) {
651        vibrator = fopen("/sys/class/timed_output/vibrator/enable", "we");
652        if (vibrator) {
653            vibrate(vibrator, 150);
654        }
655    }
656
657    /* read /proc/cmdline before dropping root */
658    FILE *cmdline = fopen("/proc/cmdline", "re");
659    if (cmdline != NULL) {
660        fgets(cmdline_buf, sizeof(cmdline_buf), cmdline);
661        fclose(cmdline);
662    }
663
664    /* collect stack traces from Dalvik and native processes (needs root) */
665    dump_traces_path = dump_traces();
666
667    /* Get the tombstone fds here while we are running as root. */
668    get_tombstone_fds(tombstone_data);
669
670    /* ensure we will keep capabilities when we drop root */
671    if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
672        ALOGE("prctl(PR_SET_KEEPCAPS) failed: %s\n", strerror(errno));
673        return -1;
674    }
675
676    /* switch to non-root user and group */
677    gid_t groups[] = { AID_LOG, AID_SDCARD_R, AID_SDCARD_RW,
678            AID_MOUNT, AID_INET, AID_NET_BW_STATS };
679    if (setgroups(sizeof(groups)/sizeof(groups[0]), groups) != 0) {
680        ALOGE("Unable to setgroups, aborting: %s\n", strerror(errno));
681        return -1;
682    }
683    if (setgid(AID_SHELL) != 0) {
684        ALOGE("Unable to setgid, aborting: %s\n", strerror(errno));
685        return -1;
686    }
687    if (setuid(AID_SHELL) != 0) {
688        ALOGE("Unable to setuid, aborting: %s\n", strerror(errno));
689        return -1;
690    }
691
692    struct __user_cap_header_struct capheader;
693    struct __user_cap_data_struct capdata[2];
694    memset(&capheader, 0, sizeof(capheader));
695    memset(&capdata, 0, sizeof(capdata));
696    capheader.version = _LINUX_CAPABILITY_VERSION_3;
697    capheader.pid = 0;
698
699    capdata[CAP_TO_INDEX(CAP_SYSLOG)].permitted = CAP_TO_MASK(CAP_SYSLOG);
700    capdata[CAP_TO_INDEX(CAP_SYSLOG)].effective = CAP_TO_MASK(CAP_SYSLOG);
701    capdata[0].inheritable = 0;
702    capdata[1].inheritable = 0;
703
704    if (capset(&capheader, &capdata[0]) < 0) {
705        ALOGE("capset failed: %s\n", strerror(errno));
706        return -1;
707    }
708
709    /* redirect output if needed */
710    char path[PATH_MAX], tmp_path[PATH_MAX];
711    pid_t gzip_pid = -1;
712
713    if (!use_socket && use_outfile) {
714        strlcpy(path, use_outfile, sizeof(path));
715        if (do_add_date) {
716            char date[80];
717            time_t now = time(NULL);
718            strftime(date, sizeof(date), "-%Y-%m-%d-%H-%M-%S", localtime(&now));
719            strlcat(path, date, sizeof(path));
720        }
721        if (do_fb) {
722            strlcpy(screenshot_path, path, sizeof(screenshot_path));
723            strlcat(screenshot_path, ".png", sizeof(screenshot_path));
724        }
725        strlcat(path, ".txt", sizeof(path));
726        strlcpy(tmp_path, path, sizeof(tmp_path));
727        strlcat(tmp_path, ".tmp", sizeof(tmp_path));
728        redirect_to_file(stdout, tmp_path);
729    }
730
731    dumpstate();
732
733    /* done */
734    if (vibrator) {
735        for (int i = 0; i < 3; i++) {
736            vibrate(vibrator, 75);
737            usleep((75 + 50) * 1000);
738        }
739        fclose(vibrator);
740    }
741
742    /* wait for gzip to finish, otherwise it might get killed when we exit */
743    if (gzip_pid > 0) {
744        fclose(stdout);
745        waitpid(gzip_pid, NULL, 0);
746    }
747
748    /* rename the (now complete) .tmp file to its final location */
749    if (use_outfile && rename(tmp_path, path)) {
750        fprintf(stderr, "rename(%s, %s): %s\n", tmp_path, path, strerror(errno));
751    }
752
753    /* tell activity manager we're done */
754    if (do_broadcast && use_outfile && do_fb) {
755        run_command(NULL, 5, "/system/bin/am", "broadcast", "--user", "0",
756                "-a", "android.intent.action.BUGREPORT_FINISHED",
757                "--es", "android.intent.extra.BUGREPORT", path,
758                "--es", "android.intent.extra.SCREENSHOT", screenshot_path,
759                "--receiver-permission", "android.permission.DUMP", NULL);
760    }
761
762    ALOGI("done\n");
763
764    return 0;
765}
766