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Improve general code quality.

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- Add a tor_process_get_pid() function that returns the PID of a
  process_handle_t.
- Conform to make check-spaces.
- Add some more documentation.
- Improve some log messages.
This commit is contained in:
George Kadianakis 2011-10-24 16:01:24 +02:00
parent 572aa4ec44
commit 47a5b8009b
3 changed files with 79 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
src/common/util.c
View File

@ -3165,11 +3165,12 @@ int
tor_terminate_process(process_handle_t *process_handle)
{
#ifdef MS_WINDOWS
if (tor_get_exit_code(process_handle, 0, NULL) == PROCESS_EXIT_RUNNING) {
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);
handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE,
process_handle->pid.dwProcessId);
if (!handle)
return -1;
@ -3177,12 +3178,23 @@ tor_terminate_process(process_handle_t *process_handle)
return -1;
else
return 0;
} else { /* process was not running */
return -1;
}
#else /* Unix */
return kill(process_handle->pid, SIGTERM);
#endif
return -1;
}
/** Return the Process ID of <b>process_handle</b>. */
int
tor_process_get_pid(process_handle_t *process_handle)
{
#ifdef MS_WINDOWS
return (int) process_handle->pid.dwProcessId;
#else
return (int) process_handle->pid;
#endif
}
#define CHILD_STATE_INIT 0
@ -3360,7 +3372,7 @@ tor_spawn_background(const char *const filename, const char **argv,
}
retval = pipe(stderr_pipe);
if (-1 == retval) { /* if it fails here, it doesn't close the stdout_pipe */
if (-1 == retval) {
log_warn(LD_GENERAL,
"Failed to set up pipe for stderr communication with child process: %s",
strerror(errno));
@ -3503,29 +3515,38 @@ tor_spawn_background(const char *const filename, const char **argv,
#endif // MS_WINDOWS
}
/** Destroy all resources allocated by the process handle in
* <b>process_handle</b>.
* If <b>also_terminate_process</b> is true, also terminate the
* process of the process handle. */
void
tor_process_destroy(process_handle_t *process_handle,
int also_terminate_process)
{
if (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
);
log_notice(LD_GENERAL, "Failed to terminate process with PID '%d'",
tor_process_get_pid(process_handle));
} else {
log_info(LD_GENERAL, "Terminated process with PID '%d'",
tor_process_get_pid(process_handle));
}
}
process_handle->status = PROCESS_STATUS_NOTRUNNING;
#ifdef MS_WINDOWS
CloseHandle(process_handle->stdout_pipe);
CloseHandle(process_handle->stderr_pipe);
if (process_handle->stdout_pipe)
CloseHandle(process_handle->stdout_pipe);
if (process_handle->stderr_pipe)
CloseHandle(process_handle->stderr_pipe);
#else
fclose(process_handle->stdout_handle);
fclose(process_handle->stderr_handle);
if (process_handle->stdout_handle)
fclose(process_handle->stdout_handle);
if (process_handle->stderr_handle)
fclose(process_handle->stderr_handle);
#endif
tor_free(process_handle);
@ -4025,14 +4046,10 @@ tor_check_port_forwarding(const char *filename, int dir_port, int or_port,
time_to_run_helper = now + TIME_TO_EXEC_FWHELPER_FAIL;
return;
}
#ifdef MS_WINDOWS
log_info(LD_GENERAL,
"Started port forwarding helper (%s)", filename);
#else
log_info(LD_GENERAL,
"Started port forwarding helper (%s) with pid %d", filename,
child_handle.pid);
#endif
"Started port forwarding helper (%s) with pid '%d'",
filename, tor_process_get_pid(&child_handle));
}
/* If child is running, read from its stdout and stderr) */

2
src/common/util.h
View File

@ -417,6 +417,8 @@ 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_process_get_pid(process_handle_t *process_handle);
int tor_terminate_process(process_handle_t *process_handle);
void tor_process_destroy(process_handle_t *process_handle,
int also_terminate_process);

67
src/or/transports.c
View File

@ -14,7 +14,8 @@
#include "util.h"
#ifdef MS_WINDOWS
static void set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp);
static void set_managed_proxy_environment(LPVOID *envp,
const managed_proxy_t *mp);
#else
static int set_managed_proxy_environment(char ***envp,
const managed_proxy_t *mp);
@ -236,15 +237,11 @@ proxy_prepare_for_restart(managed_proxy_t *mp)
tor_assert(mp->conf_state == PT_PROTO_COMPLETED);
/* kill the old obfsproxy process */
#ifdef MS_WINDOWS
tor_terminate_process(mp->process_handle);
#else
tor_terminate_process(mp->process_handle);
#endif
/* destroy the process handle and terminate the process. */
tor_process_destroy(mp->process_handle, 1);
/* ??? */
memset(mp->process_handle, 0, sizeof(process_handle_t));
/* create process handle for the upcoming new process. */
mp->process_handle = tor_malloc_zero(sizeof(process_handle_t));
/* destroy all its old transports. we no longer use them. */
SMARTLIST_FOREACH_BEGIN(mp->transports, const char *, t_name) {
@ -266,6 +263,8 @@ proxy_prepare_for_restart(managed_proxy_t *mp)
static int
launch_managed_proxy(managed_proxy_t *mp)
{
int retval;
#ifdef MS_WINDOWS
LPVOID envp=NULL;
@ -274,8 +273,8 @@ launch_managed_proxy(managed_proxy_t *mp)
tor_assert(envp);
/* Passing NULL as lpApplicationName makes Windows search for the .exe */
tor_spawn_background(NULL, (const char **)mp->argv, envp,
mp->process_handle);
retval = tor_spawn_background(NULL, (const char **)mp->argv, envp,
mp->process_handle);
tor_free(envp);
@ -286,32 +285,27 @@ launch_managed_proxy(managed_proxy_t *mp)
/* prepare the environment variables for the managed proxy */
if (set_managed_proxy_environment(&envp, mp) < 0) {
log_warn(LD_GENERAL, "Could not setup the environment of "
"the managed proxy '%s'.", mp->argv[0]);
"the managed proxy at '%s'.", mp->argv[0]);
free_execve_args(envp);
return -1;
}
tor_spawn_background(mp->argv[0], (const char **)mp->argv,
(const char **)envp, mp->process_handle);
retval = tor_spawn_background(mp->argv[0], (const char **)mp->argv,
(const char **)envp, mp->process_handle);
/* free the memory allocated by set_managed_proxy_environment(). */
free_execve_args(envp);
#endif
if (mp->process_handle->status == PROCESS_STATUS_ERROR) {
if (retval == PROCESS_STATUS_ERROR) {
log_warn(LD_GENERAL, "Managed proxy at '%s' failed at launch.",
mp->argv[0]);
return -1;
}
#ifdef MS_WINDOWS
log_info(LD_CONFIG, "Managed proxy at '%s' has spawned.",
mp->argv[0]);
#else
log_info(LD_CONFIG, "Managed proxy at '%s' has spawned with pid %d.",
mp->argv[0], mp->process_handle->pid);
#endif
log_info(LD_CONFIG, "Managed proxy at '%s' has spawned with PID '%d'.",
tor_process_get_pid(mp->process_handle));
mp->conf_state = PT_PROTO_LAUNCHED;
@ -398,8 +392,11 @@ configure_proxy(managed_proxy_t *mp)
tor_split_lines(lines, stdout_buf, pos);
/* Handle lines. */
SMARTLIST_FOREACH(lines, const char *, line,
handle_proxy_line(line, mp));
SMARTLIST_FOREACH_BEGIN(lines, const char *, line) {
handle_proxy_line(line, mp);
if (proxy_configuration_finished(mp))
goto done;
} SMARTLIST_FOREACH_END(line);
done:
/* if the proxy finished configuring, exit the loop. */
@ -410,7 +407,7 @@ configure_proxy(managed_proxy_t *mp)
smartlist_free(lines);
}
#else /* Unix version: */
#else /* MS_WINDOWS */
/** Attempt to continue configuring managed proxy <b>mp</b>. */
static void
@ -561,8 +558,8 @@ handle_finished_proxy(managed_proxy_t *mp)
case PT_PROTO_BROKEN: /* if broken: */
managed_proxy_destroy(mp, 1); /* annihilate it. */
break;
case PT_PROTO_FAILED_LAUNCH:
managed_proxy_destroy(mp, 0);
case PT_PROTO_FAILED_LAUNCH: /* if it failed before launching: */
managed_proxy_destroy(mp, 0); /* destroy it but don't terminate */
break;
case PT_PROTO_CONFIGURED: /* if configured correctly: */
register_proxy(mp); /* register its transports */
@ -696,6 +693,9 @@ handle_proxy_line(const char *line, managed_proxy_t *mp)
err:
mp->conf_state = PT_PROTO_BROKEN;
log_warn(LD_CONFIG, "Managed proxy at '%s' failed the configuration protocol"
" and will be destroyed.", mp->argv[0]);
return;
}
@ -969,6 +969,7 @@ set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp)
while (*environ_tmp)
smartlist_add(envs, *environ_tmp++);
/* Create the TOR_PT_* environment variables. */
state_tmp = get_datadir_fname("pt_state/"); /* XXX temp */
tor_asprintf(&state_env, "TOR_PT_STATE_LOCATION=%s", state_tmp);
@ -999,10 +1000,12 @@ set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp)
smartlist_add(envs, bindaddr_env);
}
/* It seems like some versions of Windows need a sorted lpEnvironment
block. */
smartlist_sort_strings(envs);
/* An environment block consists of a null-terminated block of
null-terminated strings. */
null-terminated strings: */
/* Calculate the block's size. */
SMARTLIST_FOREACH(envs, const char *, s,
@ -1012,7 +1015,7 @@ set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp)
*envp = tor_malloc(env_size);
tmp = *envp;
/* Finally, create the block */
/* Create the block. */
SMARTLIST_FOREACH_BEGIN(envs, const char *, s) {
memcpy(tmp, s, strlen(s)); /* copy the env. variable string */
tmp += strlen(s);
@ -1021,6 +1024,7 @@ set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp)
} SMARTLIST_FOREACH_END(s);
memset(tmp, '\0', 1); /* last NUL */
/* Finally, free the whole mess. */
tor_free(state_tmp);
tor_free(state_env);
tor_free(transports_to_launch);
@ -1028,10 +1032,11 @@ set_managed_proxy_environment(LPVOID *envp, const managed_proxy_t *mp)
tor_free(bindaddr_tmp);
tor_free(bindaddr_env);
tor_free(orport_env);
smartlist_free(envs);
}
#else /* Unix version: */
#else /* MS_WINDOWS */
/** Prepare the environment <b>envp</b> of managed proxy <b>mp</b>.
* <b>envp</b> is allocated on the heap and should be freed by the
@ -1091,7 +1096,7 @@ set_managed_proxy_environment(char ***envp, const managed_proxy_t *mp)
return r;
}
#endif
#endif /* MS_WINDOWS */
/** Create and return a new managed proxy for <b>transport</b> using
* <b>proxy_argv</b>. If <b>is_server</b> is true, it's a server