92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <cutils/properties.h>
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#include <cutils/sockets.h>
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// This program will trigger the dumpstate service to start a call to
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// dumpstate, then connect to the dumpstate local client to read the
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// output. All of the dumpstate output is written to stdout, including
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// any errors encountered while reading/writing the output.
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int main() {
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// Start the dumpstate service.
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property_set("ctl.start", "dumpstate");
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// Socket will not be available until service starts.
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int s;
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for (int i = 0; i < 20; i++) {
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s = socket_local_client("dumpstate", ANDROID_SOCKET_NAMESPACE_RESERVED,
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SOCK_STREAM);
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if (s >= 0)
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break;
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// Try again in 1 second.
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sleep(1);
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}
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if (s == -1) {
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printf("Failed to connect to dumpstate service: %s\n", strerror(errno));
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return 1;
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}
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// Set a timeout so that if nothing is read in 3 minutes, we'll stop
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// reading and quit. No timeout in dumpstate is longer than 60 seconds,
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// so this gives lots of leeway in case of unforeseen time outs.
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struct timeval tv;
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tv.tv_sec = 3 * 60;
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tv.tv_usec = 0;
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if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) {
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printf("WARNING: Cannot set socket timeout: %s\n", strerror(errno));
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}
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while (1) {
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char buffer[65536];
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ssize_t bytes_read = TEMP_FAILURE_RETRY(read(s, buffer, sizeof(buffer)));
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if (bytes_read == 0) {
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break;
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} else if (bytes_read == -1) {
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// EAGAIN really means time out, so change the errno.
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if (errno == EAGAIN) {
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errno = ETIMEDOUT;
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}
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printf("\nBugreport read terminated abnormally (%s).\n", strerror(errno));
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break;
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}
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ssize_t bytes_to_send = bytes_read;
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ssize_t bytes_written;
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do {
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bytes_written = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
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buffer + bytes_read - bytes_to_send,
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bytes_to_send));
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if (bytes_written == -1) {
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printf("Failed to write data to stdout: read %zd, trying to send %zd (%s)\n",
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bytes_read, bytes_to_send, strerror(errno));
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return 1;
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}
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bytes_to_send -= bytes_written;
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} while (bytes_written != 0 && bytes_to_send > 0);
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}
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close(s);
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return 0;
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}
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