static void test_atreadeof(abts_case *tc, void *data)
{
apr_status_t rv;
apr_socket_t *sock;
apr_socket_t *sock2;
apr_proc_t proc;
apr_size_t length = STRLEN;
char datastr[STRLEN];
int atreadeof = -1;
sock = setup_socket(tc);
if (!sock) return;
launch_child(tc, &proc, "write", p);
rv = apr_socket_accept(&sock2, sock, p);
APR_ASSERT_SUCCESS(tc, "Problem with receiving connection", rv);
/* Check that the remote socket is still open */
rv = apr_socket_atreadeof(sock2, &atreadeof);
APR_ASSERT_SUCCESS(tc, "Determine whether at EOF, #1", rv);
ABTS_INT_EQUAL(tc, 0, atreadeof);
memset(datastr, 0, STRLEN);
apr_socket_recv(sock2, datastr, &length);
/* Make sure that the server received the data we sent */
ABTS_STR_EQUAL(tc, DATASTR, datastr);
ABTS_SIZE_EQUAL(tc, strlen(datastr), wait_child(tc, &proc));
/* The child is dead, so should be the remote socket */
rv = apr_socket_atreadeof(sock2, &atreadeof);
APR_ASSERT_SUCCESS(tc, "Determine whether at EOF, #2", rv);
ABTS_INT_EQUAL(tc, 1, atreadeof);
rv = apr_socket_close(sock2);
APR_ASSERT_SUCCESS(tc, "Problem closing connected socket", rv);
launch_child(tc, &proc, "close", p);
rv = apr_socket_accept(&sock2, sock, p);
APR_ASSERT_SUCCESS(tc, "Problem with receiving connection", rv);
/* The child closed the socket as soon as it could... */
rv = apr_socket_atreadeof(sock2, &atreadeof);
APR_ASSERT_SUCCESS(tc, "Determine whether at EOF, #3", rv);
if (!atreadeof) { /* ... but perhaps not yet; wait a moment */
apr_sleep(apr_time_from_msec(5));
rv = apr_socket_atreadeof(sock2, &atreadeof);
APR_ASSERT_SUCCESS(tc, "Determine whether at EOF, #4", rv);
}
ABTS_INT_EQUAL(tc, 1, atreadeof);
wait_child(tc, &proc);
rv = apr_socket_close(sock2);
APR_ASSERT_SUCCESS(tc, "Problem closing connected socket", rv);
rv = apr_socket_close(sock);
APR_ASSERT_SUCCESS(tc, "Problem closing socket", rv);
}
status_t CommandSection::Execute(ReportRequestSet* requests) const {
FdBuffer buffer;
Fpipe cmdPipe;
Fpipe ihPipe;
if (!cmdPipe.init() || !ihPipe.init()) {
ALOGW("CommandSection '%s' failed to setup pipes", this->name.string());
return -errno;
}
pid_t cmdPid = fork_execute_cmd((char* const*)mCommand, NULL, &cmdPipe);
if (cmdPid == -1) {
ALOGW("CommandSection '%s' failed to fork", this->name.string());
return -errno;
}
pid_t ihPid = fork_execute_incident_helper(this->id, &cmdPipe, &ihPipe);
if (ihPid == -1) {
ALOGW("CommandSection '%s' failed to fork", this->name.string());
return -errno;
}
cmdPipe.writeFd().reset();
status_t readStatus = buffer.read(ihPipe.readFd().get(), this->timeoutMs);
write_section_stats(requests->sectionStats(this->id), buffer);
if (readStatus != NO_ERROR || buffer.timedOut()) {
ALOGW("CommandSection '%s' failed to read data from incident helper: %s, timedout: %s",
this->name.string(), strerror(-readStatus), buffer.timedOut() ? "true" : "false");
kill_child(cmdPid);
kill_child(ihPid);
return readStatus;
}
// Waiting for command here has one trade-off: the failed status of command won't be detected
// until buffer timeout, but it has advatage on starting the data stream earlier.
status_t cmdStatus = wait_child(cmdPid);
status_t ihStatus = wait_child(ihPid);
if (cmdStatus != NO_ERROR || ihStatus != NO_ERROR) {
ALOGW("CommandSection '%s' abnormal child processes, return status: command: %s, incident "
"helper: %s",
this->name.string(), strerror(-cmdStatus), strerror(-ihStatus));
return cmdStatus != NO_ERROR ? cmdStatus : ihStatus;
}
VLOG("CommandSection '%s' wrote %zd bytes in %d ms", this->name.string(), buffer.size(),
(int)buffer.durationMs());
status_t err = write_report_requests(this->id, buffer, requests);
if (err != NO_ERROR) {
ALOGW("CommandSection '%s' failed writing: %s", this->name.string(), strerror(-err));
return err;
}
return NO_ERROR;
}
/**
* Prints contents of the given file using cat command.
* @param file File to print
*/
void print_content(char *file)
{
pid = fork();
if(pid == 0)
{
execlp("cat", "cat", file, (char*)NULL);
perror("Error when executing cat command.");
exit(1);
}
else if(pid < 0)
{
perror("Error when forking the process.");
exit(1);
}
else
{
#ifdef DEBUG
sprintf(buff, "New process with PID: %d\n", pid);
write(1, buff, strlen(buff));
#endif
getchar();
wait_child();
}
}
static void test_timeout(abts_case *tc, void *data)
{
apr_status_t rv;
apr_socket_t *sock;
apr_socket_t *sock2;
apr_proc_t proc;
int protocol;
int exit;
sock = setup_socket(tc);
if (!sock) return;
launch_child(tc, &proc, "read", p);
rv = apr_socket_accept(&sock2, sock, p);
APR_ASSERT_SUCCESS(tc, "Problem with receiving connection", rv);
apr_socket_protocol_get(sock2, &protocol);
ABTS_INT_EQUAL(tc, APR_PROTO_TCP, protocol);
exit = wait_child(tc, &proc);
ABTS_INT_EQUAL(tc, SOCKET_TIMEOUT, exit);
/* We didn't write any data, so make sure the child program returns
* an error.
*/
rv = apr_socket_close(sock2);
APR_ASSERT_SUCCESS(tc, "Problem closing connected socket", rv);
rv = apr_socket_close(sock);
APR_ASSERT_SUCCESS(tc, "Problem closing socket", rv);
}
int singularity_fork_exec(unsigned int flags, char **argv) {
int retval = 1;
int i = 0;
pid_t child;
child = singularity_fork(0);
if ( child == 0 ) {
while(1) {
if ( argv[i] == NULL ) {
break;
} else if ( i == 128 ) {
singularity_message(ERROR, "singularity_fork_exec() ARGV out of bounds\n");
ABORT(255);
}
singularity_message(DEBUG, "fork argv[%d] = %s\n", i, argv[i]);
i++;
}
singularity_message(VERBOSE, "Running child program: %s\n", argv[0]);
if ( execvp(argv[0], argv) < 0 ) { //Flawfinder: ignore
singularity_message(ERROR, "Failed to exec program %s: %s\n", argv[0], strerror(errno));
ABORT(255);
}
} else if ( child > 0 ) {
retval = wait_child();
}
singularity_message(DEBUG, "Returning from singularity_fork_exec with: %d\n", retval);
return(retval);
}
static void test_recv(abts_case *tc, void *data)
{
apr_status_t rv;
apr_socket_t *sock;
apr_socket_t *sock2;
apr_proc_t proc;
int protocol;
apr_size_t length = STRLEN;
char datastr[STRLEN];
sock = setup_socket(tc);
if (!sock) return;
launch_child(tc, &proc, "write", p);
rv = apr_socket_accept(&sock2, sock, p);
APR_ASSERT_SUCCESS(tc, "Problem with receiving connection", rv);
apr_socket_protocol_get(sock2, &protocol);
ABTS_INT_EQUAL(tc, APR_PROTO_TCP, protocol);
memset(datastr, 0, STRLEN);
apr_socket_recv(sock2, datastr, &length);
/* Make sure that the server received the data we sent */
ABTS_STR_EQUAL(tc, DATASTR, datastr);
ABTS_SIZE_EQUAL(tc, strlen(datastr), wait_child(tc, &proc));
rv = apr_socket_close(sock2);
APR_ASSERT_SUCCESS(tc, "Problem closing connected socket", rv);
rv = apr_socket_close(sock);
APR_ASSERT_SUCCESS(tc, "Problem closing socket", rv);
}
static void test_send(abts_case *tc, void *data)
{
apr_status_t rv;
apr_socket_t *sock;
apr_socket_t *sock2;
apr_proc_t proc;
int protocol;
apr_size_t length;
sock = setup_socket(tc);
if (!sock) return;
launch_child(tc, &proc, "read", p);
rv = apr_socket_accept(&sock2, sock, p);
APR_ASSERT_SUCCESS(tc, "Problem with receiving connection", rv);
apr_socket_protocol_get(sock2, &protocol);
ABTS_INT_EQUAL(tc, APR_PROTO_TCP, protocol);
length = strlen(DATASTR);
apr_socket_send(sock2, DATASTR, &length);
/* Make sure that the client received the data we sent */
ABTS_SIZE_EQUAL(tc, strlen(DATASTR), wait_child(tc, &proc));
rv = apr_socket_close(sock2);
APR_ASSERT_SUCCESS(tc, "Problem closing connected socket", rv);
rv = apr_socket_close(sock);
APR_ASSERT_SUCCESS(tc, "Problem closing socket", rv);
}
int main(int argc, char ** argv) {
//初始化两个信号集，一个只有usr1，一个只有usr2
sigemptyset(&t_sigset_usr);
sigemptyset(&t_sigset_old);
sigemptyset(&t_sigset_zero);
sigaddset(&t_sigset_usr, SIGUSR1);
sigaddset(&t_sigset_usr, SIGUSR2);
//注册信号处理程序，
signal(SIGUSR1, do_sig_usr);
signal(SIGUSR2, do_sig_usr);
//父进程阻塞usr信号
sigprocmask(SIG_SETMASK, &t_sigset_usr, NULL );
pid_t child_pid;
//父进程fork一个子进程出来
child_pid = fork();
if (child_pid == 0) {
//子进程,从2开始写
num = 2;
//注册信号处理程序，
signal(SIGUSR1, do_sig_usr);
signal(SIGUSR2, do_sig_usr);
//子进程阻塞usr信号
sigprocmask(SIG_SETMASK, &t_sigset_usr, NULL );
//子进程准备完毕，通知父进程去写
tell_parent();
while (1) {
//始终等待父进程唤醒
wait_parent();
write_num_to_file();
tell_parent();
}
} else {
//父进程
while (1) {
//始终等待子进程唤醒
wait_child();
write_num_to_file();
tell_child(child_pid);
}
}
//子进程写入数据，并且告知父进程，然后投入睡眠，等待父进程唤醒
//父进程等待子进程
exit(0);
}
static int handle_child_error(int pid)
{
int ret = wait_child(pid);
if (ret < 0) {
error_msg("waitpid: %s", strerror(errno));
} else if (ret >= 256) {
error_msg("Child received signal %d", ret >> 8);
} else if (ret) {
int
wait_command(int pid)
{
if (wait_child(pid) < 0) {
printf("Fatal error in process.\n");
return (-1);
}
return (0);
}
status_t FileSection::Execute(ReportRequestSet* requests) const {
// read from mFilename first, make sure the file is available
// add O_CLOEXEC to make sure it is closed when exec incident helper
unique_fd fd(open(mFilename, O_RDONLY | O_CLOEXEC));
if (fd.get() == -1) {
ALOGW("FileSection '%s' failed to open file", this->name.string());
return this->deviceSpecific ? NO_ERROR : -errno;
}
FdBuffer buffer;
Fpipe p2cPipe;
Fpipe c2pPipe;
// initiate pipes to pass data to/from incident_helper
if (!p2cPipe.init() || !c2pPipe.init()) {
ALOGW("FileSection '%s' failed to setup pipes", this->name.string());
return -errno;
}
pid_t pid = fork_execute_incident_helper(this->id, &p2cPipe, &c2pPipe);
if (pid == -1) {
ALOGW("FileSection '%s' failed to fork", this->name.string());
return -errno;
}
// parent process
status_t readStatus = buffer.readProcessedDataInStream(fd.get(), std::move(p2cPipe.writeFd()),
std::move(c2pPipe.readFd()),
this->timeoutMs, mIsSysfs);
write_section_stats(requests->sectionStats(this->id), buffer);
if (readStatus != NO_ERROR || buffer.timedOut()) {
ALOGW("FileSection '%s' failed to read data from incident helper: %s, timedout: %s",
this->name.string(), strerror(-readStatus), buffer.timedOut() ? "true" : "false");
kill_child(pid);
return readStatus;
}
status_t ihStatus = wait_child(pid);
if (ihStatus != NO_ERROR) {
ALOGW("FileSection '%s' abnormal child process: %s", this->name.string(),
strerror(-ihStatus));
return ihStatus;
}
VLOG("FileSection '%s' wrote %zd bytes in %d ms", this->name.string(), buffer.size(),
(int)buffer.durationMs());
status_t err = write_report_requests(this->id, buffer, requests);
if (err != NO_ERROR) {
ALOGW("FileSection '%s' failed writing: %s", this->name.string(), strerror(-err));
return err;
}
return NO_ERROR;
}
/**
* Kills the main process and its child, if it's not dead already.
* @param s Signal identifier
*/
void kill_all(int s)
{
sprintf(buff, "Time is over\n");
write(1, buff, strlen(buff));
if(pid != -1)
{
kill(pid, SIGKILL);
wait_child();
}
exit(0);
}
void singularity_fork_run(unsigned int flags) {
pid_t child;
int retval;
child = singularity_fork(flags);
if ( child == 0 ) {
return;
} else if ( child > 0 ) {
retval = wait_child();
exit(retval);
}
}
char *thread_line(int line, t_screen *screen, t_scene *scene,
int (*calc_method)(t_screen *screen, t_scene *,
double, double))
{
static int start = 1;
int num;
if (start)
{
init_thread(screen, scene);
wait_child(scene->thread, &screen->img);
}
start = 0;
num = -1;
while (++num < screen->img.thread_num)
{
scene->thread[num].y = line;
scene->thread[num].calc_method = calc_method;
X(write(scene->thread[num].pipein[1], "a", 1));
}
wait_child(scene->thread, &screen->img);
return (screen->img.data + line * screen->img.sizeline);
}
static void
test_wait_child_wait3_zero_return() {
setup();
expect_not_value( mock_wait3, status, NULL );
expect_value( mock_wait3, options, WNOHANG );
expect_value( mock_wait3, rusage, NULL );
mock_wait3_status = 0;
will_return( mock_wait3, 0 );
wait_child();
teardown();
}
int
Pclose(FILE *ptr)
{
int i;
sigset_t nset, oset;
i = file_pid(ptr);
unregister_file(ptr);
(void)fclose(ptr);
(void)sigemptyset(&nset);
(void)sigaddset(&nset, SIGINT);
(void)sigaddset(&nset, SIGHUP);
(void)sigprocmask(SIG_BLOCK, &nset, &oset);
i = wait_child(i);
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
return (i);
}
int ft_run_exe(char *path, char **options, t_dlist *list)
{
pid_t pid;
if (path == NULL)
return (0);
pid = fork();
if (pid > 0)
wait_child();
if (pid == 0)
{
execve(path, options, ft_tab_from_list(list));
ft_putstr("error execve");
exit(0);
}
return (EXIT_SUCCESS);
}
/*
* Interactively dump core on "core"
*/
int
core(void)
{
int pid;
switch (pid = fork()) {
case -1:
warn("fork");
return (1);
case 0:
abort();
_exit(1);
}
printf("Okie dokie");
(void)fflush(stdout);
wait_child(pid);
if (WIFSIGNALED(wait_status) && WCOREDUMP(wait_status))
printf(" -- Core dumped.\n");
else
printf(" -- Can't dump core.\n");
return (0);
}
int parent_process()
{
int shm_id;
void* shm_ptr = NULL;
shm_id = shmget(SHM_KEY, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_MODE);
if(-1 == shm_id) {
printf("[P]Fail to create shm, errno: %d, errmsg: %s\n", errno, strerror(errno));
return -1;
}
shm_ptr = shmat(shm_id, 0, 0);
if((void*)-1 == shm_ptr) {
printf("[P]Fail to attach to shm, errno: %d, errmsg: %s\n", errno, strerror(errno));
return -1;
}
char buf[1024] = "String from parent.";
memcpy(shm_ptr, (const void*)buf, strlen(buf));
if(-1 == tell_child()) {
printf("[P]fail to tell_child, process exit\n");
shmdt(shm_ptr);
shmctl(shm_id, IPC_RMID, 0);
_exit(0);
}
if(-1 == wait_child()) {
printf("[P]fail to wait_child, process exit\n");
shmdt(shm_ptr);
shmctl(shm_id, IPC_RMID, 0);
_exit(0);
}
shmctl(shm_id, IPC_RMID, 0);
return 0;
}
/*
* Interactively dump core on "core"
*/
int
core(void *v)
{
pid_t pid;
extern int wait_status;
switch (pid = vfork()) {
case -1:
warn("vfork");
return(1);
case 0:
abort();
_exit(1);
}
//fputs("Okie dokie", stdout);
//fflush(stdout);
wait_child(pid);
if (WIFSIGNALED(wait_status) && WCOREDUMP(wait_status))
puts(" -- Core dumped.");
else
puts(" -- Can't dump core.");
return(0);
}
status_t TombstoneSection::BlockingCall(int pipeWriteFd) const {
std::unique_ptr<DIR, decltype(&closedir)> proc(opendir("/proc"), closedir);
if (proc.get() == nullptr) {
ALOGE("opendir /proc failed: %s\n", strerror(errno));
return -errno;
}
const std::set<int> hal_pids = get_interesting_hal_pids();
ProtoOutputStream proto;
struct dirent* d;
status_t err = NO_ERROR;
while ((d = readdir(proc.get()))) {
int pid = atoi(d->d_name);
if (pid <= 0) {
continue;
}
const std::string link_name = android::base::StringPrintf("/proc/%d/exe", pid);
std::string exe;
if (!android::base::Readlink(link_name, &exe)) {
ALOGE("Can't read '%s': %s\n", link_name.c_str(), strerror(errno));
continue;
}
bool is_java_process;
if (exe == "/system/bin/app_process32" || exe == "/system/bin/app_process64") {
if (mType != "java") continue;
// Don't bother dumping backtraces for the zygote.
if (IsZygote(pid)) {
VLOG("Skipping Zygote");
continue;
}
is_java_process = true;
} else if (should_dump_native_traces(exe.c_str())) {
if (mType != "native") continue;
is_java_process = false;
} else if (hal_pids.find(pid) != hal_pids.end()) {
if (mType != "hal") continue;
is_java_process = false;
} else {
// Probably a native process we don't care about, continue.
VLOG("Skipping %d", pid);
continue;
}
Fpipe dumpPipe;
if (!dumpPipe.init()) {
ALOGW("TombstoneSection '%s' failed to setup dump pipe", this->name.string());
err = -errno;
break;
}
const uint64_t start = Nanotime();
pid_t child = fork();
if (child < 0) {
ALOGE("Failed to fork child process");
break;
} else if (child == 0) {
// This is the child process.
dumpPipe.readFd().reset();
const int ret = dump_backtrace_to_file_timeout(
pid, is_java_process ? kDebuggerdJavaBacktrace : kDebuggerdNativeBacktrace,
is_java_process ? 5 : 20, dumpPipe.writeFd().get());
if (ret == -1) {
if (errno == 0) {
ALOGW("Dumping failed for pid '%d', likely due to a timeout\n", pid);
} else {
ALOGE("Dumping failed for pid '%d': %s\n", pid, strerror(errno));
}
}
dumpPipe.writeFd().reset();
_exit(EXIT_SUCCESS);
}
dumpPipe.writeFd().reset();
// Parent process.
// Read from the pipe concurrently to avoid blocking the child.
FdBuffer buffer;
err = buffer.readFully(dumpPipe.readFd().get());
// Wait on the child to avoid it becoming a zombie process.
status_t cStatus = wait_child(child);
if (err != NO_ERROR) {
ALOGW("TombstoneSection '%s' failed to read stack dump: %d", this->name.string(), err);
dumpPipe.readFd().reset();
break;
}
if (cStatus != NO_ERROR) {
ALOGE("[%s] child had an issue: %s\n", this->name.string(), strerror(-cStatus));
}
auto dump = std::make_unique<char[]>(buffer.size());
auto iterator = buffer.data();
int i = 0;
while (iterator.hasNext()) {
dump[i] = iterator.next();
i++;
}
uint64_t token = proto.start(android::os::BackTraceProto::TRACES);
proto.write(android::os::BackTraceProto::Stack::PID, pid);
proto.write(android::os::BackTraceProto::Stack::DUMP, dump.get(), i);
proto.write(android::os::BackTraceProto::Stack::DUMP_DURATION_NS,
static_cast<long long>(Nanotime() - start));
proto.end(token);
dumpPipe.readFd().reset();
}
if (!proto.flush(pipeWriteFd) && errno == EPIPE) {
ALOGE("[%s] wrote to a broken pipe\n", this->name.string());
if (err != NO_ERROR) {
return EPIPE;
}
}
return err;
}
status_t GZipSection::Execute(ReportRequestSet* requests) const {
// Reads the files in order, use the first available one.
int index = 0;
unique_fd fd;
while (mFilenames[index] != NULL) {
fd.reset(open(mFilenames[index], O_RDONLY | O_CLOEXEC));
if (fd.get() != -1) {
break;
}
ALOGW("GZipSection failed to open file %s", mFilenames[index]);
index++; // look at the next file.
}
VLOG("GZipSection is using file %s, fd=%d", mFilenames[index], fd.get());
if (fd.get() == -1) {
ALOGW("GZipSection %s can't open all the files", this->name.string());
return NO_ERROR; // e.g. LAST_KMSG will reach here in user build.
}
FdBuffer buffer;
Fpipe p2cPipe;
Fpipe c2pPipe;
// initiate pipes to pass data to/from gzip
if (!p2cPipe.init() || !c2pPipe.init()) {
ALOGW("GZipSection '%s' failed to setup pipes", this->name.string());
return -errno;
}
pid_t pid = fork_execute_cmd((char* const*)GZIP, &p2cPipe, &c2pPipe);
if (pid == -1) {
ALOGW("GZipSection '%s' failed to fork", this->name.string());
return -errno;
}
// parent process
// construct Fdbuffer to output GZippedfileProto, the reason to do this instead of using
// ProtoOutputStream is to avoid allocation of another buffer inside ProtoOutputStream.
EncodedBuffer* internalBuffer = buffer.getInternalBuffer();
internalBuffer->writeHeader((uint32_t)GZippedFileProto::FILENAME, WIRE_TYPE_LENGTH_DELIMITED);
size_t fileLen = strlen(mFilenames[index]);
internalBuffer->writeRawVarint32(fileLen);
for (size_t i = 0; i < fileLen; i++) {
internalBuffer->writeRawByte(mFilenames[index][i]);
}
internalBuffer->writeHeader((uint32_t)GZippedFileProto::GZIPPED_DATA,
WIRE_TYPE_LENGTH_DELIMITED);
size_t editPos = internalBuffer->wp()->pos();
internalBuffer->wp()->move(8); // reserve 8 bytes for the varint of the data size.
size_t dataBeginAt = internalBuffer->wp()->pos();
VLOG("GZipSection '%s' editPos=%zd, dataBeginAt=%zd", this->name.string(), editPos,
dataBeginAt);
status_t readStatus = buffer.readProcessedDataInStream(
fd.get(), std::move(p2cPipe.writeFd()), std::move(c2pPipe.readFd()), this->timeoutMs,
isSysfs(mFilenames[index]));
write_section_stats(requests->sectionStats(this->id), buffer);
if (readStatus != NO_ERROR || buffer.timedOut()) {
ALOGW("GZipSection '%s' failed to read data from gzip: %s, timedout: %s",
this->name.string(), strerror(-readStatus), buffer.timedOut() ? "true" : "false");
kill_child(pid);
return readStatus;
}
status_t gzipStatus = wait_child(pid);
if (gzipStatus != NO_ERROR) {
ALOGW("GZipSection '%s' abnormal child process: %s", this->name.string(),
strerror(-gzipStatus));
return gzipStatus;
}
// Revisit the actual size from gzip result and edit the internal buffer accordingly.
size_t dataSize = buffer.size() - dataBeginAt;
internalBuffer->wp()->rewind()->move(editPos);
internalBuffer->writeRawVarint32(dataSize);
internalBuffer->copy(dataBeginAt, dataSize);
VLOG("GZipSection '%s' wrote %zd bytes in %d ms, dataSize=%zd", this->name.string(),
buffer.size(), (int)buffer.durationMs(), dataSize);
status_t err = write_report_requests(this->id, buffer, requests);
if (err != NO_ERROR) {
ALOGW("GZipSection '%s' failed writing: %s", this->name.string(), strerror(-err));
return err;
}
return NO_ERROR;
}
int
main(int argc, char *argv[])
{
struct pidfh *pfh = NULL;
sigset_t mask, oldmask;
int ch, nochdir, noclose, restart;
const char *pidfile, *user;
pid_t otherpid, pid;
nochdir = noclose = 1;
restart = 0;
pidfile = user = NULL;
while ((ch = getopt(argc, argv, "-cfp:ru:")) != -1) {
switch (ch) {
case 'c':
nochdir = 0;
break;
case 'f':
noclose = 0;
break;
case 'p':
pidfile = optarg;
break;
case 'r':
restart = 1;
break;
case 'u':
user = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc == 0)
usage();
pfh = NULL;
/*
* Try to open the pidfile before calling daemon(3),
* to be able to report the error intelligently
*/
if (pidfile != NULL) {
pfh = pidfile_open(pidfile, 0600, &otherpid);
if (pfh == NULL) {
if (errno == EEXIST) {
errx(3, "process already running, pid: %d",
otherpid);
}
err(2, "pidfile ``%s''", pidfile);
}
}
if (daemon(nochdir, noclose) == -1)
err(1, NULL);
/*
* If the pidfile or restart option is specified the daemon
* executes the command in a forked process and wait on child
* exit to remove the pidfile or restart the command. Normally
* we don't want the monitoring daemon to be terminated
* leaving the running process and the stale pidfile, so we
* catch SIGTERM and forward it to the children expecting to
* get SIGCHLD eventually.
*/
pid = -1;
if (pidfile != NULL || restart) {
/*
* Restore default action for SIGTERM in case the
* parent process decided to ignore it.
*/
if (signal(SIGTERM, SIG_DFL) == SIG_ERR)
err(1, "signal");
/*
* Because SIGCHLD is ignored by default, setup dummy handler
* for it, so we can mask it.
*/
if (signal(SIGCHLD, dummy_sighandler) == SIG_ERR)
err(1, "signal");
/*
* Block interesting signals.
*/
sigemptyset(&mask);
sigaddset(&mask, SIGTERM);
sigaddset(&mask, SIGCHLD);
if (sigprocmask(SIG_SETMASK, &mask, &oldmask) == -1)
err(1, "sigprocmask");
/*
* Try to protect against pageout kill. Ignore the
* error, madvise(2) will fail only if a process does
* not have superuser privileges.
*/
(void)madvise(NULL, 0, MADV_PROTECT);
restart:
/*
* Spawn a child to exec the command, so in the parent
* we could wait for it to exit and remove pidfile.
*/
pid = fork();
if (pid == -1) {
pidfile_remove(pfh);
err(1, "fork");
}
}
if (pid <= 0) {
if (pid == 0) {
/* Restore old sigmask in the child. */
if (sigprocmask(SIG_SETMASK, &oldmask, NULL) == -1)
err(1, "sigprocmask");
}
/* Now that we are the child, write out the pid. */
pidfile_write(pfh);
if (user != NULL)
restrict_process(user);
execvp(argv[0], argv);
/*
* execvp() failed -- report the error. The child is
* now running, so the exit status doesn't matter.
*/
err(1, "%s", argv[0]);
}
setproctitle("%s[%d]", argv[0], pid);
if (wait_child(pid, &mask) == 0 && restart) {
sleep(1);
goto restart;
}
pidfile_remove(pfh);
exit(0); /* Exit status does not matter. */
}
int main(int argc, char const *argv[])
{
char buf[MAXSIZE]={'\0'};
char buf_r[MAXSIZE]={'\0'};
int fd[2];
pipe(fd);
signal(SIGPIPE,fun);
pid_t pid;
int len = 0;
int nr = 0;
int sum = 0;
int nread,len_r;
//signal tongbu
tell_wait();
//sgnal tongbu
pid = fork();
if (pid <0) {
perror("error");
/* code */
}else if (pid == 0) {
/* code */
wait_father();
printf("the child process.....%d\n",getpid());
printf("the child process's father process id:%d\n",getppid());
close(fd[1]);
while((nread = read(fd[0],buf,sizeof(buf)))!=-1){
tell_father(pid);
setbuf(stdout,NULL);//set the stdout no buffer
printf("the child write to stdout:");
write(STDOUT_FILENO,buf,nread); //the write to stdout is bo bug ,but the printf is bug
len_r = strlen(buf);
printf("len_r :%d\n",len_r );
for (int i = 0; (buf[i]!='\n'); i++) {
sum +=i;
printf("sum:%d\n",sum );
printf("buf[%d]:%c\t",i,buf[i] );
if (buf[i]=='\0') {
break;
}
}
printf("\n");
// printf("child read:%s\n",buf ); //the sentence is bug ,it is of buffer and \n
}
exit(0);
}else{
// sleep(3);
tell_child(pid);
printf("the father process.......%d\n",getpid());
printf("the father process's father process id:%d\n",getppid());
close(fd[0]);//the sentense to invlole the SIGPIPE take place
char * p = NULL; /* code */
while((p = fgets(buf,sizeof(buf),stdin))!=NULL){
len = strlen(buf);
printf("the length :%d\n",len );
if (p[len] =='\n') {
printf("%c\n",p[len -1] );
len--;
p[len ] = '\0';
/* code */
}
if (p[len -1] == '\0') {
printf("fgets read the null in buffer\n");
/* code */
}
fflush(stdin);
int n = write(fd[1],buf,len);
if (n==-1) {
if (errno = EINTR) {
printf("the failed is SIGINT\n");
/* code */
}
printf("err write\n");
}else
printf("father write to pipe successfully\n");
wait_child();
}
int status;
// the waitpid 's return val is the son process pid,if it wait to catch the son state successfully
int ret = waitpid(pid,&status,0);
if (ret == -1) {
printf("wait child failed\n");
/* code */
}else
printf("the wait id:%d\n", ret);//the ret == son pid
}
return 0;
}
int main(int argc, char *argv[])
{
int i,n_children,k,pid[MAX];
// Print all argument (debug purpose)
printf("Arguments:\n");
for (i = 0; i < argc; i++)
printf("[%d]:%s\n", i,argv[i]);
//Check number of arguments
if(argc < 2){
printf("Illegal number of parameters\n");
exit(1);
}
//Check argument is digit
if(!isdigit(argv[1][0])){
printf("%d parameter is not digit\n",argv[1][0]);
exit(1);
}
n_children = atoi(argv[1]);
k = (int)n_children/2;
printf("n_children = %d\n", n_children);
printf("k = %d\n", k);
printf("----- start program -----\n");
for (i = 0; i < n_children; ++i)
{
//printf("about to create child [%d]\n", i);
pid[i] = fork();
if (pid[i] == 0) // child
{
printf("child:pid - [%d][%d]\n",i,getpid());
if (i<k){
printf("\tchild[%d] about to start wait\n",getpid());
wait_for_signal();
}
else {
printf("\tchild[%d] wait 5 sec\n",getpid());
sleep_and_terminate();
}
}
else if (pid[i] > 0) {
//father
}
else //Errors
{
perror("Impossibile fare la fork():");
exit(2);
}
}
for (i = 0; i < k; ++i)
{
kill(pid[i],SIGUSR1);
}
for (i = 0; i < n_children; ++i)
{
wait_child();
}
return 0;
}
int main(int argc, char *argv[]) {
euca_opts euca_args;
euca_opts *args = &euca_args;
java_home_t *data = NULL;
int status = 0;
pid_t pid = 0;
uid_t uid = 0;
gid_t gid = 0;
int i;
if (arguments(argc, argv, args) != 0)
exit(1);
debug = args->debug_flag;
set_output(GETARG(args, out), GETARG(args, err));
if (args->kill_flag == 1)
return stop_child(args);
if (checkuser(GETARG(args, user), &uid, &gid) == 0)
return 1;
for (i = 0; i < args->java_home_given; ++i) {
__debug("Trying user supplied java home: %s", args->java_home_arg[i]);
data = get_java_home(args->java_home_arg[i]);
if (data != NULL) {
break;
}
}
char* java_home_env = getenv("JAVA_HOME");
if (data == NULL && java_home_env != NULL) {
__debug("Trying environment JAVA_HOME: %s", java_home_env);
data = get_java_home(java_home_env);
}
if (data == NULL && !args->java_home_given &&
args->java_home_arg[0] != NULL && CHECK_ISDIR(args->java_home_arg[0])) {
__debug("Trying built-in java home: %s", args->java_home_arg[0]);
data = get_java_home(args->java_home_arg[0]);
}
if (data == NULL && CHECK_ISREG("/usr/bin/java")) {
char * javapath = (char *) calloc(PATH_MAX, sizeof(char));
javapath = realpath("/usr/bin/java", javapath);
if (javapath != NULL) {
javapath[strlen(javapath)-strlen("jre/bin/java")] = '\0';
__debug("Trying system java home: %s", javapath);
data = get_java_home(javapath);
}
}
if (data == NULL) {
__error("Cannot locate Java Home");
return 1;
}
int x;
if (debug == 1) {
__debug("+-- DUMPING JAVA HOME STRUCTURE ------------------------");
__debug("| Java Home: \"%s\"", PRINT_NULL(data->path));
__debug("| Found JVMs: %d", data->jnum);
for (x = 0; x < data->jnum; x++) {
jvm_info_t *jvm = data->jvms[x];
__debug("| JVM Name: \"%s\"", PRINT_NULL(jvm->name));
__debug("| \"%s\"", PRINT_NULL(jvm->libjvm_path));
}
__debug("+-------------------------------------------------------");
}
if (strcmp(argv[0], "eucalyptus-cloud") != 0) {
char *oldpath = getenv("LD_LIBRARY_PATH"), *libf = java_library(args,
data);
char *old = argv[0], buf[32768], *tmp = NULL, *p1 = NULL, *p2 = NULL;
p1 = strdup(libf);
tmp = strrchr(p1, '/');
if (tmp != NULL)
tmp[0] = '\0';
p2 = strdup(p1);
tmp = strrchr(p2, '/');
if (tmp != NULL)
tmp[0] = '\0';
if (oldpath == NULL)
snprintf(buf, 32768, "%s:%s:%s/bin/linux-x64", p1, p2, GETARG(args,
profiler_home));
else
snprintf(buf, 32768, "%s:%s:%s:%s/bin/linux-x64", oldpath, p1, p2,
GETARG(args, profiler_home));
tmp = strdup(buf);
setenv("LD_LIBRARY_PATH", tmp, 1);
__debug("Invoking w/ LD_LIBRARY_PATH=%s", getenv("LD_LIBRARY_PATH"));
argv[0] = "eucalyptus-cloud";
execve(old, argv, environ);
__error("Cannot execute process");
return 1;
}
__debug("Running w/ LD_LIBRARY_PATH=%s", getenv("LD_LIBRARY_PATH"));
if (args->fork_flag) {
pid = fork();
__die((pid == -1), "Cannot detach from parent process");
if (pid != 0)
return wait_child(args, pid);
setsid();
}
while ((pid = fork()) != -1) {
if (pid == 0)
exit(child(args, data, uid, gid));
child_pid = pid;
signal(SIGHUP, controller);
signal(SIGTERM, controller);
signal(SIGINT, controller);
while (waitpid(-1, &status, 0) != pid)
;
if (WIFEXITED(status)) {
status = WEXITSTATUS(status);
__debug("Eucalyptus exited with status: %d", status);
unlink(GETARG(args, pidfile));
if (status == EUCA_RET_RELOAD) {
__debug("Reloading service.");
continue;
} else if (status == 0) {
__debug("Service shut down cleanly.");
return 0;
}
__error("Service exit with a return value of %d.", status);
return 1;
} else {
perror("Service did not exit cleanly.");
__error("Service did not exit cleanly: exit value=%d.", status);
return 1;
}
}
__error("Cannot decouple controller/child processes");
return 1;
}
int main( int argc, char *argv[ ] ) {
euca_opts euca_args;
euca_opts *args = &euca_args;
java_home_t *data = NULL;
int status = 0;
pid_t pid = 0;
uid_t uid = 0;
gid_t gid = 0;
if( arguments( argc, argv, args ) != 0 ) exit( 1 );
debug = args->verbose_flag || args->debug_flag;
if( args->stop_flag == 1 ) return stop_child( args );
if( checkuser( GETARG( args, user ), &uid, &gid ) == 0 ) return 1;
char* java_home_user = GETARG(args,java_home);
char* java_home_env = getenv( "JAVA_HOME" );
if( java_home_user != NULL ) {
__debug("Trying user supplied java home: %s", java_home_user);
data = get_java_home(java_home_user);
}
if( data == NULL && java_home_env != NULL ) {
__debug("Trying environment JAVA_HOME: %s", java_home_env);
data = get_java_home(java_home_env);
}
__debug("TODO: loop through common locations for JVMs here.");
if( data == NULL ) {
__error( "Cannot locate Java Home" );
return 1;
}
int x;
if( debug == 1 ) {
__debug( "+-- DUMPING JAVA HOME STRUCTURE ------------------------" );
__debug( "| Java Home: \"%s\"", PRINT_NULL( data->path ) );
__debug( "| Found JVMs: %d", data->jnum );
for( x = 0; x < data->jnum; x++ ) {
jvm_info_t *jvm = data->jvms[ x ];
__debug( "| JVM Name: \"%s\"", PRINT_NULL( jvm->name ) );
__debug( "| \"%s\"", PRINT_NULL( jvm->libjvm_path ) );
}
__debug( "+-------------------------------------------------------" );
}
if( strcmp( argv[ 0 ], "eucalyptus-cloud" ) != 0 ) {
char *oldpath = getenv( "LD_LIBRARY_PATH" ),*libf = java_library( args, data );
char *old = argv[ 0 ],buf[ 32768 ],*tmp = NULL,*p1 = NULL,*p2 = NULL;
p1 = strdup( libf );
tmp = strrchr( p1, '/' );
if( tmp != NULL ) tmp[ 0 ] = '\0';
p2 = strdup( p1 );
tmp = strrchr( p2, '/' );
if( tmp != NULL ) tmp[ 0 ] = '\0';
if( oldpath == NULL ) snprintf( buf, 32768, "%s:%s:%s/bin/linux-x64", p1, p2, GETARG(args,profiler_home) );
else snprintf( buf, 32768, "%s:%s:%s:%s/bin/linux-x64", oldpath, p1, p2, GETARG(args,profiler_home) );
tmp = strdup( buf );
setenv( "LD_LIBRARY_PATH", tmp, 1 );
__debug( "Invoking w/ LD_LIBRARY_PATH=%s", getenv( "LD_LIBRARY_PATH" ) );
argv[ 0 ] = "eucalyptus-cloud";
execve( old, argv, environ );
__error( "Cannot execute process" );
return 1;
}
__debug( "Running w/ LD_LIBRARY_PATH=%s", getenv( "LD_LIBRARY_PATH" ) );
if(args->fork_flag) {
pid = fork( );
__die(( pid == -1 ),"Cannot detach from parent process" );
if( pid != 0 ) return wait_child( args, pid );
setsid( );
}
set_output(GETARG(args,out), GETARG(args,err));
while( ( pid = fork( ) ) != -1 ) {
if( pid == 0 ) exit( child( args, data, uid, gid ) );
child_pid = pid;
signal( SIGHUP, controller );
signal( SIGTERM, controller );
signal( SIGINT, controller );
while( waitpid( pid, &status, 0 ) != pid );
if( WIFEXITED( status ) ) {
status = WEXITSTATUS( status );
__debug( "Eucalyptus exited with status: %d", status );
if( status != 122 ) unlink( GETARG( args, pidfile ) );
if( status == 123 ) {
__debug( "Reloading service" );
continue;
}
if( status == 0 ) {
__debug( "Service shut down" );
return 0;
}
__error( "Service exit with a return value of %d", status );
return 1;
} else {
__error( "Service did not exit cleanly exit value %d", status );
return 1;
}
}
__error( "Cannot decouple controller/child processes" );
return 1;
}
static int stop_child( euca_opts *args ) {
int pid = __get_pid( GETARG(args,pidfile) );
if( pid <= 0 ) return -1;
kill( pid, SIGTERM );
return wait_child(args,pid);
}
int wait_all_childs() {
int failures = 0;
while (forked_childs > 0)
failures += wait_child();
return failures;
}
/*
* Evaluate the string given as a new mailbox name.
* Supported meta characters:
* % for my system mail box
* %user for user's system mail box
* # for previous file
* & invoker's mbox file
* +file file in folder directory
* any shell meta character
* Return the file name as a dynamic string.
*/
char *
expand(char *name)
{
char xname[PATHSIZE];
char cmdbuf[PATHSIZE]; /* also used for file names */
int pid, l;
char *cp, *sh;
int pivec[2];
struct stat sbuf;
/*
* The order of evaluation is "%" and "#" expand into constants.
* "&" can expand into "+". "+" can expand into shell meta characters.
* Shell meta characters expand into constants.
* This way, we make no recursive expansion.
*/
switch (*name) {
case '%':
findmail(name[1] ? name + 1 : myname, xname, sizeof(xname));
return (savestr(xname));
case '#':
if (name[1] != 0)
break;
if (prevfile[0] == 0) {
printf("No previous file\n");
return (NULL);
}
return (savestr(prevfile));
case '&':
if (name[1] == 0 && (name = value("MBOX")) == NULL)
name = "~/mbox";
/* fall through */
}
if (name[0] == '+' && getfold(cmdbuf, sizeof(cmdbuf)) >= 0) {
(void)snprintf(xname, sizeof(xname), "%s/%s", cmdbuf, name + 1);
name = savestr(xname);
}
/* catch the most common shell meta character */
if (name[0] == '~' && homedir != NULL &&
(name[1] == '/' || name[1] == '\0')) {
(void)snprintf(xname, sizeof(xname), "%s%s", homedir, name + 1);
name = savestr(xname);
}
if (!strpbrk(name, "~{[*?$`'\"\\"))
return (name);
if (pipe(pivec) < 0) {
warn("pipe");
return (name);
}
(void)snprintf(cmdbuf, sizeof(cmdbuf), "echo %s", name);
if ((sh = value("SHELL")) == NULL)
sh = _PATH_CSHELL;
pid = start_command(sh, 0, -1, pivec[1], "-c", cmdbuf, NULL);
if (pid < 0) {
(void)close(pivec[0]);
(void)close(pivec[1]);
return (NULL);
}
(void)close(pivec[1]);
l = read(pivec[0], xname, BUFSIZ);
(void)close(pivec[0]);
if (wait_child(pid) < 0 && WIFSIGNALED(wait_status) &&
WTERMSIG(wait_status) != SIGPIPE) {
fprintf(stderr, "\"%s\": Expansion failed.\n", name);
return (NULL);
}
if (l < 0) {
warn("read");
return (NULL);
}
if (l == 0) {
fprintf(stderr, "\"%s\": No match.\n", name);
return (NULL);
}
if (l == BUFSIZ) {
fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
return (NULL);
}
xname[l] = '\0';
for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
;
cp[1] = '\0';
if (strchr(xname, ' ') && stat(xname, &sbuf) < 0) {
fprintf(stderr, "\"%s\": Ambiguous.\n", name);
return (NULL);
}
return (savestr(xname));
}
