bugreportz.cpp revision 2628e9e939fda323fa44c5cb743f4a77b12a312a 
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 <stdio.h>
19#include <sys/socket.h>
20#include <sys/types.h>
21#include <unistd.h>
22
23#include <cutils/properties.h>
24#include <cutils/sockets.h>
25
26// TODO: code below was copy-and-pasted from bugreport.cpp (except by the timeout value);
27// should be reused instead.
28int main() {
29
30    // Start the dumpstatez service.
31    property_set("ctl.start", "dumpstatez");
32
33    // Socket will not be available until service starts.
34    int s;
35    for (int i = 0; i < 20; i++) {
36        s = socket_local_client("dumpstate", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
37        if (s >= 0)
38            break;
39        // Try again in 1 second.
40        sleep(1);
41    }
42
43    if (s == -1) {
44        printf("Failed to connect to dumpstatez service: %s\n", strerror(errno));
45        return 1;
46    }
47
48    // Set a timeout so that if nothing is read in 10 minutes, we'll stop
49    // reading and quit. No timeout in dumpstate is longer than 60 seconds,
50    // so this gives lots of leeway in case of unforeseen time outs.
51    struct timeval tv;
52    tv.tv_sec = 10 * 60;
53    tv.tv_usec = 0;
54    if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) {
55        printf("WARNING: Cannot set socket timeout: %s\n", strerror(errno));
56    }
57
58    while (1) {
59        char buffer[65536];
60        ssize_t bytes_read = TEMP_FAILURE_RETRY(
61                read(s, buffer, sizeof(buffer)));
62        if (bytes_read == 0) {
63            break;
64        } else if (bytes_read == -1) {
65            // EAGAIN really means time out, so change the errno.
66            if (errno == EAGAIN) {
67                errno = ETIMEDOUT;
68            }
69            printf("\nBugreport read terminated abnormally (%s).\n",
70                    strerror(errno));
71            break;
72        }
73
74        ssize_t bytes_to_send = bytes_read;
75        ssize_t bytes_written;
76        do {
77            bytes_written = TEMP_FAILURE_RETRY(
78                    write(STDOUT_FILENO, buffer + bytes_read - bytes_to_send,
79                            bytes_to_send));
80            if (bytes_written == -1) {
81                printf(
82                        "Failed to write data to stdout: read %zd, trying to send %zd (%s)\n",
83                        bytes_read, bytes_to_send, strerror(errno));
84                return 1;
85            }
86            bytes_to_send -= bytes_written;
87        } while (bytes_written != 0 && bytes_to_send > 0);
88    }
89
90    close(s);
91    return 0;
92
93}
94