GNUnet  0.10.x
Data Structures | Functions
helper.c File Reference

API for dealing with (SUID) helper processes that communicate via GNUNET_MessageHeaders on stdin/stdout. More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_mst_lib.h"
Include dependency graph for helper.c:

Go to the source code of this file.

Data Structures

struct  GNUNET_HELPER_SendHandle
 Entry in the queue of messages we need to transmit to the helper. More...
 
struct  GNUNET_HELPER_Handle
 The handle to a helper process. More...
 

Functions

int GNUNET_HELPER_kill (struct GNUNET_HELPER_Handle *h, int soft_kill)
 Sends termination signal to the helper process. More...
 
int GNUNET_HELPER_wait (struct GNUNET_HELPER_Handle *h)
 Reap the helper process. More...
 
static void stop_helper (struct GNUNET_HELPER_Handle *h, int soft_kill)
 Stop the helper process, we're closing down or had an error. More...
 
static void restart_task (void *cls)
 Restart the helper process. More...
 
static void helper_read (void *cls)
 Read from the helper-process. More...
 
static void start_helper (struct GNUNET_HELPER_Handle *h)
 Start the helper process. More...
 
struct GNUNET_HELPER_HandleGNUNET_HELPER_start (int with_control_pipe, const char *binary_name, char *const binary_argv[], GNUNET_MessageTokenizerCallback cb, GNUNET_HELPER_ExceptionCallback exp_cb, void *cb_cls)
 Starts a helper and begins reading from it. More...
 
void GNUNET_HELPER_destroy (struct GNUNET_HELPER_Handle *h)
 Free's the resources occupied by the helper handle. More...
 
void GNUNET_HELPER_stop (struct GNUNET_HELPER_Handle *h, int soft_kill)
 Kills the helper, closes the pipe and frees the handle. More...
 
static void helper_write (void *cls)
 Write to the helper-process. More...
 
struct GNUNET_HELPER_SendHandleGNUNET_HELPER_send (struct GNUNET_HELPER_Handle *h, const struct GNUNET_MessageHeader *msg, int can_drop, GNUNET_HELPER_Continuation cont, void *cont_cls)
 Send an message to the helper. More...
 
void GNUNET_HELPER_send_cancel (struct GNUNET_HELPER_SendHandle *sh)
 Cancel a GNUNET_HELPER_send operation. More...
 

Detailed Description

API for dealing with (SUID) helper processes that communicate via GNUNET_MessageHeaders on stdin/stdout.

Author
Philipp Toelke
Christian Grothoff

Definition in file helper.c.

Function Documentation

◆ stop_helper()

static void stop_helper ( struct GNUNET_HELPER_Handle h,
int  soft_kill 
)
static

Stop the helper process, we're closing down or had an error.

Parameters
hhandle to the helper process
soft_killif GNUNET_YES, signals termination by closing the helper's stdin; GNUNET_NO to signal termination by sending SIGTERM to helper

Definition at line 292 of file helper.c.

References GNUNET_break, GNUNET_HELPER_kill(), GNUNET_HELPER_wait(), GNUNET_OK, GNUNET_SCHEDULER_cancel(), GNUNET_HELPER_Handle::restart_task, and restart_task().

Referenced by GNUNET_HELPER_stop(), helper_read(), helper_write(), and start_helper().

294 {
295  if (NULL != h->restart_task)
296  {
298  h->restart_task = NULL;
299  }
300  else
301  {
302  GNUNET_break (GNUNET_OK == GNUNET_HELPER_kill (h, soft_kill));
304  }
305 }
int GNUNET_HELPER_kill(struct GNUNET_HELPER_Handle *h, int soft_kill)
Sends termination signal to the helper process.
Definition: helper.c:180
struct GNUNET_SCHEDULER_Task * restart_task
Restart task.
Definition: helper.c:156
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
int GNUNET_HELPER_wait(struct GNUNET_HELPER_Handle *h)
Reap the helper process.
Definition: helper.c:231
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:965
Here is the call graph for this function:
Here is the caller graph for this function:

◆ restart_task()

static void restart_task ( void *  cls)
static

Restart the helper process.

Parameters
clshandle to the helper process

Definition at line 461 of file helper.c.

References GNUNET_ERROR_TYPE_INFO, GNUNET_log, GNUNET_HELPER_SendHandle::h, GNUNET_HELPER_Handle::restart_task, GNUNET_HELPER_Handle::retry_back_off, and start_helper().

Referenced by helper_read(), helper_write(), start_helper(), and stop_helper().

462 {
463  struct GNUNET_HELPER_Handle*h = cls;
464 
465  h->restart_task = NULL;
466  h->retry_back_off++;
468  "Restarting helper with back-off %u\n",
469  h->retry_back_off);
470  start_helper (h);
471 }
struct GNUNET_SCHEDULER_Task * restart_task
Restart task.
Definition: helper.c:156
The handle to a helper process.
Definition: helper.c:80
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:94
unsigned int retry_back_off
Count start attempts to increase linear back off.
Definition: helper.c:166
static void start_helper(struct GNUNET_HELPER_Handle *h)
Start the helper process.
Definition: helper.c:410
#define GNUNET_log(kind,...)
Here is the call graph for this function:
Here is the caller graph for this function:

◆ helper_read()

static void helper_read ( void *  cls)
static

Read from the helper-process.

Parameters
clshandle to the helper process

Definition at line 323 of file helper.c.

References _, GNUNET_HELPER_Handle::binary_name, buf, GNUNET_HELPER_Handle::cb_cls, GNUNET_HELPER_Handle::exp_cb, GNUNET_HELPER_Handle::fh_from_helper, GNUNET_ALIGN, GNUNET_DISK_file_read(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_HELPER_stop(), GNUNET_log, GNUNET_MAX_MESSAGE_SIZE, GNUNET_MST_from_buffer(), GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_read_file(), GNUNET_SYSERR, GNUNET_TIME_relative_multiply(), GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_TIME_UNIT_SECONDS, GNUNET_HELPER_SendHandle::h, GNUNET_HELPER_Handle::mst, GNUNET_HELPER_Handle::read_task, GNUNET_HELPER_Handle::restart_task, restart_task(), GNUNET_HELPER_Handle::retry_back_off, stop_helper(), STRERROR, and t.

Referenced by start_helper().

324 {
325  struct GNUNET_HELPER_Handle *h = cls;
327  ssize_t t;
328 
329  h->read_task = NULL;
330  t = GNUNET_DISK_file_read (h->fh_from_helper, &buf, sizeof (buf));
331  if (t < 0)
332  {
333  /* On read-error, restart the helper */
335  _("Error reading from `%s': %s\n"),
336  h->binary_name,
337  STRERROR (errno));
338  if (NULL != h->exp_cb)
339  {
340  h->exp_cb (h->cb_cls);
342  return;
343  }
344  stop_helper (h, GNUNET_NO);
345  /* Restart the helper */
347  h->retry_back_off),
348  &restart_task, h);
349  return;
350  }
351  if (0 == t)
352  {
353  /* this happens if the helper is shut down via a
354  signal, so it is not a "hard" error */
356  "Got 0 bytes from helper `%s' (EOF)\n",
357  h->binary_name);
358  if (NULL != h->exp_cb)
359  {
360  h->exp_cb (h->cb_cls);
362  return;
363  }
364  stop_helper (h, GNUNET_NO);
365  /* Restart the helper */
366  h->restart_task
368  h->retry_back_off),
369  &restart_task, h);
370  return;
371  }
373  "Got %u bytes from helper `%s'\n",
374  (unsigned int) t,
375  h->binary_name);
377  h->fh_from_helper,
378  &helper_read, h);
379  if (GNUNET_SYSERR ==
381  buf, t,
382  GNUNET_NO,
383  GNUNET_NO))
384  {
386  _("Failed to parse inbound message from helper `%s'\n"),
387  h->binary_name);
388  if (NULL != h->exp_cb)
389  {
390  h->exp_cb (h->cb_cls);
392  return;
393  }
394  stop_helper (h, GNUNET_NO);
395  /* Restart the helper */
397  h->retry_back_off),
398  &restart_task, h);
399  return;
400  }
401 }
static void restart_task(void *cls)
Restart the helper process.
Definition: helper.c:461
struct GNUNET_SCHEDULER_Task * restart_task
Restart task.
Definition: helper.c:156
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:881
The handle to a helper process.
Definition: helper.c:80
#define GNUNET_TIME_UNIT_SECONDS
One second.
#define STRERROR(i)
Definition: plibc.h:676
void GNUNET_HELPER_stop(struct GNUNET_HELPER_Handle *h, int soft_kill)
Kills the helper, closes the pipe and frees the handle.
Definition: helper.c:569
#define GNUNET_NO
Definition: gnunet_common.h:81
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_file(struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready f...
Definition: scheduler.c:1643
static struct GNUNET_SCHEDULER_Task * t
Main task.
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:94
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
struct GNUNET_SCHEDULER_Task * read_task
Task to read from the helper.
Definition: helper.c:146
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1246
unsigned int retry_back_off
Count start attempts to increase linear back off.
Definition: helper.c:166
static char buf[2048]
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
Definition: time.c:439
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
int GNUNET_MST_from_buffer(struct GNUNET_MessageStreamTokenizer *mst, const char *buf, size_t size, int purge, int one_shot)
Add incoming data to the receive buffer and call the callback for all complete messages.
Definition: mst.c:116
char * binary_name
Binary to run.
Definition: helper.c:136
GNUNET_HELPER_ExceptionCallback exp_cb
The exception callback.
Definition: helper.c:116
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
void * cb_cls
The closure for callbacks.
Definition: helper.c:121
struct GNUNET_MessageStreamTokenizer * mst
The Message-Tokenizer that tokenizes the messages comming from the helper.
Definition: helper.c:111
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message...
static void stop_helper(struct GNUNET_HELPER_Handle *h, int soft_kill)
Stop the helper process, we&#39;re closing down or had an error.
Definition: helper.c:292
#define GNUNET_ALIGN
gcc-ism to force alignment; we use this to align char-arrays that may then be cast to &#39;struct&#39;s...
#define GNUNET_log(kind,...)
static void helper_read(void *cls)
Read from the helper-process.
Definition: helper.c:323
const struct GNUNET_DISK_FileHandle * fh_from_helper
FileHandle to receive data from the helper.
Definition: helper.c:96
Here is the call graph for this function:
Here is the caller graph for this function:

◆ start_helper()

static void start_helper ( struct GNUNET_HELPER_Handle h)
static

Start the helper process.

Parameters
hhandle to the helper process

Definition at line 410 of file helper.c.

References GNUNET_HELPER_Handle::binary_argv, GNUNET_HELPER_Handle::binary_name, GNUNET_HELPER_Handle::fh_from_helper, GNUNET_HELPER_Handle::fh_to_helper, GNUNET_DISK_pipe(), GNUNET_DISK_pipe_close_end(), GNUNET_DISK_PIPE_END_READ, GNUNET_DISK_PIPE_END_WRITE, GNUNET_DISK_pipe_handle(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_OS_INHERIT_STD_ERR, GNUNET_OS_start_process_vap(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_read_file(), GNUNET_TIME_relative_multiply(), GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_TIME_UNIT_SECONDS, GNUNET_YES, GNUNET_HELPER_Handle::helper_in, GNUNET_HELPER_Handle::helper_out, GNUNET_HELPER_Handle::helper_proc, helper_read(), GNUNET_HELPER_Handle::mst, GNUNET_HELPER_Handle::read_task, GNUNET_HELPER_Handle::restart_task, restart_task(), GNUNET_HELPER_Handle::retry_back_off, stop_helper(), and GNUNET_HELPER_Handle::with_control_pipe.

Referenced by GNUNET_HELPER_start(), and restart_task().

411 {
414  if ( (h->helper_in == NULL) || (h->helper_out == NULL))
415  {
416  /* out of file descriptors? try again later... */
417  stop_helper (h, GNUNET_NO);
418  h->restart_task =
420  h->retry_back_off),
421  &restart_task, h);
422  return;
423  }
425  "Starting HELPER process `%s'\n",
426  h->binary_name);
427  h->fh_from_helper =
429  h->fh_to_helper =
431  h->helper_proc =
433  h->helper_in, h->helper_out, NULL,
434  h->binary_name,
435  h->binary_argv);
436  if (NULL == h->helper_proc)
437  {
438  /* failed to start process? try again later... */
439  stop_helper (h, GNUNET_NO);
441  h->retry_back_off),
442  &restart_task, h);
443  return;
444  }
447  if (NULL != h->mst)
449  h->fh_from_helper,
450  &helper_read,
451  h);
452 }
const struct GNUNET_DISK_FileHandle * fh_to_helper
FileHandle to send data to the helper.
Definition: helper.c:101
When this flag is set, the child process will inherit stderr of the parent.
Definition: gnunet_os_lib.h:92
static void restart_task(void *cls)
Restart the helper process.
Definition: helper.c:461
struct GNUNET_SCHEDULER_Task * restart_task
Restart task.
Definition: helper.c:156
struct GNUNET_DISK_PipeHandle * helper_out
PipeHandle to send data to the helper.
Definition: helper.c:91
#define GNUNET_TIME_UNIT_SECONDS
One second.
#define GNUNET_NO
Definition: gnunet_common.h:81
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_file(struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready f...
Definition: scheduler.c:1643
int with_control_pipe
Does the helper support the use of a control pipe for signalling?
Definition: helper.c:161
const struct GNUNET_DISK_FileHandle * GNUNET_DISK_pipe_handle(const struct GNUNET_DISK_PipeHandle *p, enum GNUNET_DISK_PipeEnd n)
Get the handle to a particular pipe end.
Definition: disk.c:2641
struct GNUNET_SCHEDULER_Task * read_task
Task to read from the helper.
Definition: helper.c:146
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1246
unsigned int retry_back_off
Count start attempts to increase linear back off.
Definition: helper.c:166
struct GNUNET_DISK_PipeHandle * helper_in
PipeHandle to receive data from the helper.
Definition: helper.c:86
struct GNUNET_OS_Process * GNUNET_OS_start_process_vap(int pipe_control, enum GNUNET_OS_InheritStdioFlags std_inheritance, struct GNUNET_DISK_PipeHandle *pipe_stdin, struct GNUNET_DISK_PipeHandle *pipe_stdout, struct GNUNET_DISK_PipeHandle *pipe_stderr, const char *filename, char *const argv[])
Start a process.
Definition: os_priority.c:1321
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
Definition: time.c:439
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
The writing-end of a pipe.
The reading-end of a pipe.
struct GNUNET_DISK_PipeHandle * GNUNET_DISK_pipe(int blocking_read, int blocking_write, int inherit_read, int inherit_write)
Creates an interprocess channel.
Definition: disk.c:2289
char * binary_name
Binary to run.
Definition: helper.c:136
char ** binary_argv
NULL-terminated list of command-line arguments.
Definition: helper.c:141
struct GNUNET_MessageStreamTokenizer * mst
The Message-Tokenizer that tokenizes the messages comming from the helper.
Definition: helper.c:111
static void stop_helper(struct GNUNET_HELPER_Handle *h, int soft_kill)
Stop the helper process, we&#39;re closing down or had an error.
Definition: helper.c:292
int GNUNET_DISK_pipe_close_end(struct GNUNET_DISK_PipeHandle *p, enum GNUNET_DISK_PipeEnd end)
Closes one half of an interprocess channel.
Definition: disk.c:2532
struct GNUNET_OS_Process * helper_proc
The process id of the helper.
Definition: helper.c:106
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
static void helper_read(void *cls)
Read from the helper-process.
Definition: helper.c:323
const struct GNUNET_DISK_FileHandle * fh_from_helper
FileHandle to receive data from the helper.
Definition: helper.c:96
Here is the call graph for this function:
Here is the caller graph for this function:

◆ helper_write()

static void helper_write ( void *  cls)
static

Write to the helper-process.

Parameters
clshandle to the helper process

Definition at line 584 of file helper.c.

References _, GNUNET_HELPER_Handle::binary_name, buf, GNUNET_HELPER_Handle::cb_cls, GNUNET_HELPER_SendHandle::cont, GNUNET_HELPER_SendHandle::cont_cls, GNUNET_HELPER_Handle::exp_cb, GNUNET_HELPER_Handle::fh_to_helper, GNUNET_CONTAINER_DLL_remove, GNUNET_DISK_file_write(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_HELPER_stop(), GNUNET_log, GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_write_file(), GNUNET_TIME_relative_multiply(), GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_TIME_UNIT_SECONDS, GNUNET_YES, GNUNET_HELPER_SendHandle::h, GNUNET_HELPER_SendHandle::msg, GNUNET_HELPER_Handle::restart_task, restart_task(), GNUNET_HELPER_Handle::retry_back_off, sh, GNUNET_HELPER_Handle::sh_head, GNUNET_HELPER_Handle::sh_tail, GNUNET_MessageHeader::size, stop_helper(), STRERROR, t, GNUNET_HELPER_SendHandle::wpos, and GNUNET_HELPER_Handle::write_task.

Referenced by GNUNET_HELPER_send().

585 {
586  struct GNUNET_HELPER_Handle *h = cls;
588  const char *buf;
589  ssize_t t;
590 
591  h->write_task = NULL;
592  if (NULL == (sh = h->sh_head))
593  {
595  "Helper write had no work!\n");
596  return; /* how did this happen? */
597  }
598  buf = (const char*) sh->msg;
600  &buf[sh->wpos],
601  ntohs (sh->msg->size) - sh->wpos);
602  if (-1 == t)
603  {
604  /* On write-error, restart the helper */
606  _("Error writing to `%s': %s\n"),
607  h->binary_name,
608  STRERROR (errno));
609  if (NULL != h->exp_cb)
610  {
611  h->exp_cb (h->cb_cls);
613  return;
614  }
616  "Stopping and restarting helper task!\n");
617  stop_helper (h, GNUNET_NO);
618  /* Restart the helper */
620  h->retry_back_off),
621  &restart_task, h);
622  return;
623  }
625  "Transmitted %u bytes to %s\n",
626  (unsigned int) t,
627  h->binary_name);
628  sh->wpos += t;
629  if (sh->wpos == ntohs (sh->msg->size))
630  {
632  h->sh_tail,
633  sh);
634  if (NULL != sh->cont)
635  sh->cont (sh->cont_cls, GNUNET_YES);
636  GNUNET_free (sh);
637  }
638  if (NULL != h->sh_head)
640  h->fh_to_helper,
641  &helper_write,
642  h);
643 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
const struct GNUNET_DISK_FileHandle * fh_to_helper
FileHandle to send data to the helper.
Definition: helper.c:101
static void restart_task(void *cls)
Restart the helper process.
Definition: helper.c:461
struct GNUNET_SCHEDULER_Task * restart_task
Restart task.
Definition: helper.c:156
The handle to a helper process.
Definition: helper.c:80
unsigned int wpos
Current write position.
Definition: helper.c:72
#define GNUNET_TIME_UNIT_SECONDS
One second.
#define STRERROR(i)
Definition: plibc.h:676
void GNUNET_HELPER_stop(struct GNUNET_HELPER_Handle *h, int soft_kill)
Kills the helper, closes the pipe and frees the handle.
Definition: helper.c:569
Entry in the queue of messages we need to transmit to the helper.
Definition: helper.c:36
#define GNUNET_NO
Definition: gnunet_common.h:81
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_write_file(struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *wfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready f...
Definition: scheduler.c:1675
struct GNUNET_HELPER_SendHandle * sh_tail
Last message queued for transmission to helper.
Definition: helper.c:131
static struct GNUNET_SCHEDULER_Task * t
Main task.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:94
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
struct GNUNET_SCHEDULER_Task * write_task
Task to read from the helper.
Definition: helper.c:151
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1246
unsigned int retry_back_off
Count start attempts to increase linear back off.
Definition: helper.c:166
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:1049
static struct SolverHandle * sh
static char buf[2048]
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
Definition: time.c:439
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
struct GNUNET_HELPER_SendHandle * sh_head
First message queued for transmission to helper.
Definition: helper.c:126
char * binary_name
Binary to run.
Definition: helper.c:136
GNUNET_HELPER_ExceptionCallback exp_cb
The exception callback.
Definition: helper.c:116
void * cb_cls
The closure for callbacks.
Definition: helper.c:121
static void stop_helper(struct GNUNET_HELPER_Handle *h, int soft_kill)
Stop the helper process, we&#39;re closing down or had an error.
Definition: helper.c:292
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
const struct GNUNET_MessageHeader * msg
Message to transmit (allocated at the end of this struct)
Definition: helper.c:52
GNUNET_HELPER_Continuation cont
Function to call upon completion.
Definition: helper.c:62
static void helper_write(void *cls)
Write to the helper-process.
Definition: helper.c:584
void * cont_cls
Closure to &#39;cont&#39;.
Definition: helper.c:67
#define GNUNET_free(ptr)
Wrapper around free.
Here is the call graph for this function:
Here is the caller graph for this function: