bugreportz.cpp revision ceeb64281d012cfac99827adbcdb5800b2ce0542 
1/*
2 * Copyright (C) 2016 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 <errno.h>
18#include <getopt.h>
19#include <stdio.h>
20#include <sys/socket.h>
21#include <sys/types.h>
22#include <unistd.h>
23
24#include <cutils/properties.h>
25#include <cutils/sockets.h>
26
27static constexpr char VERSION[] = "1.0";
28
29static void show_usage() {
30  fprintf(stderr,
31          "usage: bugreportz [-h | -v]\n"
32          "  -h: to display this help message\n"
33          "  -v: to display the version\n"
34          "  or no arguments to generate a zipped bugreport\n");
35}
36
37static void show_version() {
38  fprintf(stderr, "%s\n", VERSION);
39}
40
41int main(int argc, char *argv[]) {
42
43    if (argc > 1) {
44        /* parse arguments */
45        int c;
46        while ((c = getopt(argc, argv, "vh")) != -1) {
47            switch (c) {
48                case 'h':
49                    show_usage();
50                    return EXIT_SUCCESS;
51                case 'v':
52                    show_version();
53                    return EXIT_SUCCESS;
54                default:
55                    show_usage();
56                    return EXIT_FAILURE;
57            }
58        }
59        // passed an argument not starting with -
60        if (optind > 1 || argv[optind] != nullptr) {
61            show_usage();
62            return EXIT_FAILURE;
63        }
64    }
65
66    // TODO: code below was copy-and-pasted from bugreport.cpp (except by the timeout value);
67    // should be reused instead.
68
69    // Start the dumpstatez service.
70    property_set("ctl.start", "dumpstatez");
71
72    // Socket will not be available until service starts.
73    int s;
74    for (int i = 0; i < 20; i++) {
75        s = socket_local_client("dumpstate", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
76        if (s >= 0)
77            break;
78        // Try again in 1 second.
79        sleep(1);
80    }
81
82    if (s == -1) {
83        printf("Failed to connect to dumpstatez service: %s\n", strerror(errno));
84        return EXIT_FAILURE;
85    }
86
87    // Set a timeout so that if nothing is read in 10 minutes, we'll stop
88    // reading and quit. No timeout in dumpstate is longer than 60 seconds,
89    // so this gives lots of leeway in case of unforeseen time outs.
90    struct timeval tv;
91    tv.tv_sec = 10 * 60;
92    tv.tv_usec = 0;
93    if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) {
94        printf("WARNING: Cannot set socket timeout: %s\n", strerror(errno));
95    }
96
97    while (1) {
98        char buffer[65536];
99        ssize_t bytes_read = TEMP_FAILURE_RETRY(
100                read(s, buffer, sizeof(buffer)));
101        if (bytes_read == 0) {
102            break;
103        } else if (bytes_read == -1) {
104            // EAGAIN really means time out, so change the errno.
105            if (errno == EAGAIN) {
106                errno = ETIMEDOUT;
107            }
108            printf("\nBugreport read terminated abnormally (%s).\n",
109                    strerror(errno));
110            break;
111        }
112
113        ssize_t bytes_to_send = bytes_read;
114        ssize_t bytes_written;
115        do {
116            bytes_written = TEMP_FAILURE_RETRY(
117                    write(STDOUT_FILENO, buffer + bytes_read - bytes_to_send,
118                            bytes_to_send));
119            if (bytes_written == -1) {
120                printf(
121                        "Failed to write data to stdout: read %zd, trying to send %zd (%s)\n",
122                        bytes_read, bytes_to_send, strerror(errno));
123                return EXIT_FAILURE;
124            }
125            bytes_to_send -= bytes_written;
126        } while (bytes_written != 0 && bytes_to_send > 0);
127    }
128
129    close(s);
130    return EXIT_SUCCESS;
131}
132