+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2013-2014 RAD Game Tools and Valve Software
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- **************************************************************************/
-
-#include <stdio.h>
-#include <fcntl.h>
-#include <assert.h>
-#include <sys/wait.h>
-#include "vogl_applauncher.h"
-#include "base/posix/eintr_wrapper.h"
-
-extern char **__environ;
-
-namespace vogl
-{
-
-app_launcher::app_launcher()
-{
- m_status_code = STATUS_NOTLAUNCHED;
- m_status = 0;
- m_child_pid = -1;
-
- m_stdout = NULL;
- m_stderr = NULL;
-
- memset(m_stdout_pipe, -1, sizeof(m_stdout_pipe));
- memset(m_stderr_pipe, -1, sizeof(m_stderr_pipe));
-}
-
-app_launcher::~app_launcher()
-{
- stop();
-}
-
-sigset_t
-set_signal_mask(const sigset_t& sigmask_new)
-{
- sigset_t sigmask_old;
- pthread_sigmask(SIG_SETMASK, &sigmask_new, &sigmask_old);
- return sigmask_old;
-}
-
-bool
-app_launcher::run(const char *file, const char *const argv[], const char *const envp[], uint flags)
-{
- assert(!is_running());
-
- stop();
- m_status_code = STATUS_NOTLAUNCHED;
- m_status = 0;
-
- const char *argv_def[2];
- if (!argv)
- {
- argv_def[0] = file;
- argv_def[1] = NULL;
- argv = argv_def;
- }
-
- if (!envp)
- {
- envp = __environ;
- }
-
- vogl::vector<char *> new_envp;
- if (flags & RUN_REMOVE_LD_PRELOAD_ENV)
- {
- // Remove LD_PRELOAD. Need to do this to keep glxinfo from preloading us again (for example).
- static const char ld_preload_str[] = "LD_PRELOAD=";
- static const size_t ld_preload_len = sizeof(ld_preload_str) - 1;
-
- for(int i = 0; environ[i]; i++)
- {
- if (strncmp(ld_preload_str, environ[i], ld_preload_len))
- new_envp.push_back(environ[i]);
- }
-
- new_envp.push_back(NULL);
- envp = new_envp.get_ptr();
- }
-
- // [0]: read end, [1]: write end
- // Use pipe2 with O_CLOEXEC? O_NONBLK?
- int ret_stdout = pipe(m_stdout_pipe);
- int ret_stderr = pipe(m_stderr_pipe);
- if ((ret_stdout < 0) || (ret_stderr < 0))
- return false;
-
- sigset_t sigset_full;
- sigfillset(&sigset_full);
- const sigset_t sigmask_orig = set_signal_mask(sigset_full);
-
- // Careful: fork() can return pid of a script...
- m_child_pid = fork();
-
- if (m_child_pid != 0)
- {
- // Restore sigmask for parent.
- set_signal_mask(sigmask_orig);
- }
-
- if (m_child_pid < 0)
- {
- assert(0);
- m_status_code = STATUS_ERROR;
- m_status = m_child_pid;
- return false;
- }
- else if (m_child_pid == 0)
- {
- // According to chromium LaunchProcess(), readline processes can block forever
- // unless we set stdin to /dev/null.
- int null_fd = HANDLE_EINTR(open("/dev/null", O_RDONLY));
- if (null_fd < 0)
- _exit(127);
-
- int new_stdin = HANDLE_EINTR(dup2(null_fd, STDIN_FILENO));
- ret_stdout = HANDLE_EINTR(dup2(m_stdout_pipe[1], STDOUT_FILENO));
- ret_stderr = HANDLE_EINTR(dup2(m_stderr_pipe[1], STDERR_FILENO));
- if ((new_stdin < 0) || (ret_stdout < 0) || (ret_stderr < 0))
- _exit(127);
-
- close(m_stdout_pipe[0]); // close read pipe
- close(m_stderr_pipe[0]); // close read pipe
- m_stdout_pipe[0] = -1;
- m_stderr_pipe[0] = -1;
-
- // exec file
- execvpe(file, (char * const *)argv, (char * const *)envp);
- _exit(127);
- }
-
- close(m_stdout_pipe[1]);
- close(m_stderr_pipe[1]);
- m_stdout_pipe[1] = -1;
- m_stderr_pipe[1] = -1;
-
- m_status_code = STATUS_RUNNING;
- return true;
-}
-
-bool
-app_launcher::update_status(bool wait)
-{
- if (m_status_code != STATUS_RUNNING)
- return false;
-
- assert(m_child_pid >= 0);
-
- int options = WEXITED; // WSTOPPED: wait for children stopped by delivery of signal.
- if(!wait)
- options |= WNOHANG;
-
- siginfo_t signalinfo;
- int ret = waitid(P_PID, m_child_pid, &signalinfo, options);
-
- if (ret == -1)
- {
- m_status_code = STATUS_ERROR;
- m_status = ret;
- assert(0);
- return false;
- }
- else
- {
- // If we ever care about signals and whatnot:
- // signalinfo.si_signo; // Signal number.
- // signalinfo.si_code; // Signal code: CLD_EXITED, CLD_DUMPED, CLD_KILLED.
- // signalinfo.si_errno; // Error number associated with signal.
- // signalinfo.si_status; // Exit value.
- switch(signalinfo.si_code)
- {
- default:
- assert(0);
- case CLD_EXITED:
- m_status_code = STATUS_EXITED;
- m_status = signalinfo.si_status;
- break;
- case CLD_KILLED:
- m_status_code = STATUS_KILLED;
- m_status = 0;
- break;
- case CLD_DUMPED:
- m_status_code = STATUS_DUMPED;
- m_status = 0;
- break;
- }
- }
-
- return true;
-}
-
-void
-app_launcher::get_status(STATUS_CODE *code, int *status, bool wait)
-{
- update_status(wait);
-
- *code = m_status_code;
- *status = m_status;
-}
-
-bool
-app_launcher::is_running()
-{
- update_status(false);
-
- return (m_status_code == STATUS_RUNNING);
-}
-
-bool
-app_launcher::stop()
-{
- update_status(true);
- if (m_status_code == STATUS_RUNNING)
- {
- kill(m_child_pid, SIGTERM);
-
- update_status(true);
- if (m_status_code == STATUS_RUNNING)
- {
- kill(m_child_pid, SIGKILL);
- update_status(true);
- }
- }
- assert(m_status_code != STATUS_RUNNING);
-
- if (m_stdout)
- {
- fclose(m_stdout);
- m_stdout = NULL;
- }
- if (m_stderr)
- {
- fclose(m_stderr);
- m_stderr = NULL;
- }
-
- for (int i = 0; i < 2; i++)
- {
- if (m_stdout_pipe[i] >= 0)
- {
- close(m_stdout_pipe[i]);
- m_stdout_pipe[i] = -1;
- }
- if (m_stderr_pipe[i] >= 0)
- {
- close(m_stderr_pipe[i]);
- m_stderr_pipe[i] = -1;
- }
- }
-
- return true;
-}
-
-bool
-app_launcher::get_output(int pipe, vogl::dynamic_string &output, size_t max_output)
-{
- if (pipe != -1)
- {
- if (max_output <= 0)
- return true;
-
- for(;;)
- {
- char buf[4096];
- size_t nbytes = max_output;
- if (nbytes >= sizeof(buf))
- nbytes = sizeof(buf);
-
- // Try to read in nbytes. read returns 0:end of file, -1:error.
- ssize_t length = HANDLE_EINTR(read(pipe, buf, nbytes));
- if (length < 0)
- return false;
-
- max_output -= length;
- output.append(buf, (uint)length);
-
- if ((length != (ssize_t)nbytes) || (max_output <= 0))
- return true;
- }
- }
-
- return false;
-}
-
-bool
-app_launcher::get_stdout(vogl::dynamic_string &output, size_t max_output)
-{
- return get_output(m_stdout_pipe[0], output, max_output);
-}
-
-bool
-app_launcher::get_stderr(vogl::dynamic_string &output, size_t max_output)
-{
- return get_output(m_stdout_pipe[1], output, max_output);
-}
-
-bool
-app_launcher::get_line(char **line_stdout, size_t *line_stdout_size, char **line_stderr, size_t *line_stderr_size)
-{
- if (!m_stdout)
- {
- m_stdout = fdopen(m_stdout_pipe[0], "r");
- setvbuf(m_stdout, NULL, _IONBF, 0);
- }
- if (!m_stderr)
- {
- m_stderr = fdopen(m_stderr_pipe[0], "r");
- setvbuf(m_stderr, NULL, _IONBF, 0);
- }
- if (!m_stdout || !m_stderr)
- {
- assert(0);
- return false;
- }
-
- *line_stdout_size = 0;
- *line_stderr_size = 0;
-
- fd_set set;
- FD_ZERO(&set);
- FD_SET(m_stdout_pipe[0], &set);
- FD_SET(m_stderr_pipe[0], &set);
-
- bool got_line = false;
- struct timeval timeout;
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
-
- int ret = select(FD_SETSIZE, &set, NULL, NULL, &timeout);
- if (ret < 0)
- {
- assert(0);
- return false;
- }
- if (!feof(m_stdout) && FD_ISSET(m_stdout_pipe[0], &set))
- {
- getline(line_stdout, line_stdout_size, m_stdout);
- got_line = true;
- }
- if (!feof(m_stderr) && FD_ISSET(m_stderr_pipe[0], &set))
- {
- getline(line_stderr, line_stderr_size, m_stderr);
- got_line = true;
- }
-
- return got_line;
-}
-
-} // namespace vogl
+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2013-2014 RAD Game Tools and Valve Software
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- **************************************************************************/
-
-#ifndef __VOGL_APPLAUNCHER_H__
-#define __VOGL_APPLAUNCHER_H__
-
-#include <unistd.h>
-#include <stdio.h>
-#include "vogl_dynamic_string.h"
-
-// Example usage of this class. It launches glxinfo and grabs stdout.
-#if 0
- vogl::app_launcher launcher;
- if (launcher.run("glxinfo", NULL, NULL, vogl::app_launcher::RUN_REMOVE_LD_PRELOAD_ENV))
- {
- vogl::dynamic_string output;
- if (launcher.get_stdout(output, 16384))
- {
- printf("got stdout: %s\n", output.c_str());
- launcher.stop();
- }
- }
-#endif
-
-namespace vogl
-{
-
-class app_launcher
-{
-public:
- app_launcher();
- ~app_launcher();
-
- enum
- {
- RUN_REMOVE_LD_PRELOAD_ENV = 0x00000001, // Parse envp and remove LD_PRELOAD.
- };
- bool run(const char *file, const char *const argv[], const char *const envp[], uint flags);
- bool stop();
-
- bool is_running();
-
- bool get_stdout(vogl::dynamic_string &output, size_t max_output = (size_t)-1); //SIZE_MAX);
- bool get_stderr(vogl::dynamic_string &output, size_t max_output = (size_t)-1); //SIZE_MAX);
- bool get_line(char **line_stdout, size_t *line_stdout_size, char **line_stderr, size_t *line_stderr_size);
-
- enum STATUS_CODE { STATUS_ERROR = -1, STATUS_NOTLAUNCHED, STATUS_RUNNING, STATUS_EXITED, STATUS_DUMPED, STATUS_KILLED };
- void get_status(STATUS_CODE *code, int *status, bool wait);
-
-private:
- // Check for app exiting & update m_exit_status.
- bool update_status(bool wait);
- // Internal routine used for get_stdout and get_stderr.
- bool get_output(int pipe, vogl::dynamic_string &output, size_t max_output);
-
- STATUS_CODE m_status_code;
- int m_status;
- pid_t m_child_pid; // Pid of child (could be a script).
-
- int m_stdout_pipe[2];
- int m_stderr_pipe[2];
- FILE *m_stdout;
- FILE *m_stderr;
-};
-
-} // namespace vogl
-
-#endif // __VOGL_APPLAUNCHER_H__
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