用于EagleEye3.0 规则集漏报和误报测试的示例项目,项目收集于github和gitee
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/* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "sql/mysqld_daemon.h"
#include "my_config.h"
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include "mysql/components/services/log_builtins.h"
#include "mysqld_error.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "sql/sql_const.h"
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
namespace {
bool is_daemon_proc = false;
}
/**
Prediacate to test if we're currently executing
in the daemon process.
@retval true if this is the daemon
@retval false otherwise
*/
bool mysqld::runtime::is_daemon() { return is_daemon_proc; }
/**
Daemonize mysqld.
This function does sysv style of daemonization of mysqld.
@return
@retval In daemon; file descriptor for the write end of the status pipe.
@retval In parent; -1 if successful.
@retval In parent; -2 in case of errors.
*/
int mysqld::runtime::mysqld_daemonize() {
int pipe_fd[2];
if (pipe(pipe_fd) < 0) return -2;
pid_t pid = fork();
if (pid == -1) {
// Error
close(pipe_fd[0]);
close(pipe_fd[1]);
return -2;
}
if (pid != 0) {
// Parent, close write end of pipe.
close(pipe_fd[1]);
// Wait for first child to fork successfully.
int rc, status;
char waitstatus;
while ((rc = waitpid(pid, &status, 0)) == -1 && errno == EINTR) {
// Retry if errno is EINTR.
}
if (rc == -1) {
LogErr(ERROR_LEVEL, ER_WAITPID_FAILED, static_cast<long long>(pid));
close(pipe_fd[0]);
close(pipe_fd[1]);
return -2;
}
// The error log is now owned by the daemon, and anything buffered
// up will be dumped by it. So we just discard the buffered messages here.
discard_error_log_messages();
// Parent waits for pipe message from grand child
rc = read(pipe_fd[0], &waitstatus, 1);
close(pipe_fd[0]);
if (rc != 1) {
LogErr(ERROR_LEVEL, ER_FAILED_TO_FIND_MYSQLD_STATUS, strerror(errno), rc);
return -2;
} else if (waitstatus != 1) {
return -2;
}
// Parent should return to calling function (mysqld_main) and not
// call exit() directly.
return -1;
} else {
// Child, close read end of pipe file descriptor.
close(pipe_fd[0]);
int stdinfd;
if ((stdinfd = open("/dev/null", O_RDONLY)) <= STDERR_FILENO) {
close(pipe_fd[1]);
exit(MYSQLD_ABORT_EXIT);
}
if (!(dup2(stdinfd, STDIN_FILENO) != STDIN_FILENO) && (setsid() > -1)) {
close(stdinfd);
pid_t grand_child_pid = fork();
switch (grand_child_pid) {
case 0: // Grand child
is_daemon_proc = true;
return pipe_fd[1];
case -1:
close(pipe_fd[1]);
_exit(MYSQLD_FAILURE_EXIT);
default:
_exit(MYSQLD_SUCCESS_EXIT);
}
} else {
close(stdinfd);
close(pipe_fd[1]);
_exit(MYSQLD_SUCCESS_EXIT);
}
}
}
/**
Signal parent to exit.
@param pipe_write_fd File Descriptor of write end of pipe.
@param status status of the initialization done by grand child.
1 means initialization complete and the server
is ready to accept client connections.
0 means intialization aborted due to some failure.
@note This function writes the status to write end of pipe.
This notifies the parent which is block on read end of pipe.
*/
void mysqld::runtime::signal_parent(int pipe_write_fd, char status) {
if (pipe_write_fd != -1) {
while (write(pipe_write_fd, &status, 1) == -1 && errno == EINTR) {
// Retry write syscall if errno is EINTR.
}
close(pipe_write_fd);
}
}