commit f12a40d8603a7e3e215652fe3bb54e2e1566646c Author: George Kadianakis desnacked@gmail.com Date: Mon Oct 24 15:55:53 2011 +0200

Prepare util.[ch] to use the new process_handle_t API.

Also, create tor_process_destroy() which destroys a process_handle_t. --- src/common/util.c | 64 +++++++++++++++++++++++++++++++++++++++++----------- src/common/util.h | 12 ++++++++- 2 files changed, 60 insertions(+), 16 deletions(-)

diff --git a/src/common/util.c b/src/common/util.c index 79e09e4..6a0893b 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -3159,25 +3159,29 @@ format_helper_exit_status(unsigned char child_state, int saved_errno, /* Maximum number of file descriptors, if we cannot get it via sysconf() */ #define DEFAULT_MAX_FD 256

-/** Terminate process running at PID <b>pid</b>. +/** Terminate the process of <b>process_handle</b>. * Code borrowed from Python's os.kill. */ int -tor_terminate_process(pid_t pid) +tor_terminate_process(process_handle_t *process_handle) { #ifdef MS_WINDOWS - HANDLE handle; - /* If the signal is outside of what GenerateConsoleCtrlEvent can use, - attempt to open and terminate the process. */ - handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid); - if (!handle) - return -1; + if (tor_get_exit_code(process_handle, 0, NULL) == PROCESS_EXIT_RUNNING) { + HANDLE handle; + /* If the signal is outside of what GenerateConsoleCtrlEvent can use, + attempt to open and terminate the process. */ + handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, process_handle->pid.dwProcessId); + if (!handle) + return -1;

- if (!TerminateProcess(handle, 0)) + if (!TerminateProcess(handle, 0)) + return -1; + else + return 0; + } else { /* process was not running */ return -1; - else - return 0; + } #else /* Unix */ - return kill(pid, SIGTERM); + return kill(process_handle->pid, SIGTERM); #endif }

@@ -3213,7 +3217,11 @@ tor_terminate_process(pid_t pid) */ int tor_spawn_background(const char *const filename, const char **argv, +#ifdef MS_WINDOWS + LPVOID envp, +#else const char **envp, +#endif process_handle_t *process_handle) { #ifdef MS_WINDOWS @@ -3293,7 +3301,7 @@ tor_spawn_background(const char *const filename, const char **argv, /*(TODO: set CREATE_NEW CONSOLE/PROCESS_GROUP to make GetExitCodeProcess() * work?) */ 0, // creation flags - NULL, // use parent's environment + envp, // use parent's environment NULL, // use parent's current directory &siStartInfo, // STARTUPINFO pointer &(process_handle->pid)); // receives PROCESS_INFORMATION @@ -3352,7 +3360,7 @@ tor_spawn_background(const char *const filename, const char **argv, }

retval = pipe(stderr_pipe); - if (-1 == retval) { + if (-1 == retval) { /* if it fails here, it doesn't close the stdout_pipe */ log_warn(LD_GENERAL, "Failed to set up pipe for stderr communication with child process: %s", strerror(errno)); @@ -3495,6 +3503,34 @@ tor_spawn_background(const char *const filename, const char **argv, #endif // MS_WINDOWS }

+void +tor_process_destroy(process_handle_t *process_handle, + int also_terminate_process) +{ + if (also_terminate_process) + if (tor_terminate_process(process_handle) < 0) { + log_notice(LD_GENERAL, "Failed to terminate process with PID " +#ifdef MS_WINDOWS + "%u\n", process_handle->pid.dwProcessId +#else + "%d\n", (int) process_handle->pid +#endif + ); + } + + process_handle->status = PROCESS_STATUS_NOTRUNNING; + +#ifdef MS_WINDOWS + CloseHandle(process_handle->stdout_pipe); + CloseHandle(process_handle->stderr_pipe); +#else + fclose(process_handle->stdout_handle); + fclose(process_handle->stderr_handle); +#endif + + tor_free(process_handle); +} + /** Get the exit code of a process specified by <b>process_handle</b> and store * it in <b>exit_code</b>, if set to a non-NULL value. If <b>block</b> is set * to true, the call will block until the process has exited. Otherwise if diff --git a/src/common/util.h b/src/common/util.h index c5a52d1..b9f3a5b 100644 --- a/src/common/util.h +++ b/src/common/util.h @@ -360,10 +360,14 @@ void write_pidfile(char *filename); void tor_check_port_forwarding(const char *filename, int dir_port, int or_port, time_t now);

-int tor_terminate_process(pid_t pid); typedef struct process_handle_s process_handle_t; int tor_spawn_background(const char *const filename, const char **argv, - const char **envp, process_handle_t *process_handle); +#ifdef MS_WINDOWS + LPVOID envp, +#else + const char **envp, +#endif + process_handle_t *process_handle);

#define SPAWN_ERROR_MESSAGE "ERR: Failed to spawn background process - code "

@@ -413,6 +417,10 @@ ssize_t tor_read_all_from_process_stderr( const process_handle_t *process_handle, char *buf, size_t count); char *tor_join_win_cmdline(const char *argv[]);

+int tor_terminate_process(process_handle_t *process_handle); +void tor_process_destroy(process_handle_t *process_handle, + int also_terminate_process); + #ifdef UTIL_PRIVATE /* Prototypes for private functions only used by util.c (and unit tests) */