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