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 <stdlib.h>
20#include <string.h>
21#include <unistd.h>
22
23#include <string>
24
25#include <android-base/file.h>
26#include <android-base/strings.h>
27
28#include "bugreportz.h"
29
30static constexpr char BEGIN_PREFIX[] = "BEGIN:";
31static constexpr char PROGRESS_PREFIX[] = "PROGRESS:";
32
33static void write_line(const std::string& line, bool show_progress) {
34    if (line.empty()) return;
35
36    // When not invoked with the -p option, it must skip BEGIN and PROGRESS lines otherwise it
37    // will break adb (which is expecting either OK or FAIL).
38    if (!show_progress && (android::base::StartsWith(line, PROGRESS_PREFIX) ||
39                           android::base::StartsWith(line, BEGIN_PREFIX)))
40        return;
41
42    android::base::WriteStringToFd(line, STDOUT_FILENO);
43}
44
45int bugreportz(int s, bool show_progress) {
46    std::string line;
47    while (1) {
48        char buffer[65536];
49        ssize_t bytes_read = TEMP_FAILURE_RETRY(read(s, buffer, sizeof(buffer)));
50        if (bytes_read == 0) {
51            break;
52        } else if (bytes_read == -1) {
53            // EAGAIN really means time out, so change the errno.
54            if (errno == EAGAIN) {
55                errno = ETIMEDOUT;
56            }
57            printf("FAIL:Bugreport read terminated abnormally (%s)\n", strerror(errno));
58            break;
59        }
60
61        // Writes line by line.
62        for (int i = 0; i < bytes_read; i++) {
63            char c = buffer[i];
64            line.append(1, c);
65            if (c == '\n') {
66                write_line(line, show_progress);
67                line.clear();
68            }
69        }
70    }
71    // Process final line, in case it didn't finish with newline
72    write_line(line, show_progress);
73
74    if (close(s) == -1) {
75        fprintf(stderr, "WARNING: error closing socket: %s\n", strerror(errno));
76    }
77    return EXIT_SUCCESS;
78}
79