/*
This file is part of GNUnet
- (C) 2002, 2003, 2004, 2005, 2006 Christian Grothoff (and other contributing authors)
+ (C) 2002, 2003, 2004, 2005, 2006, 2011 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
/**
* This handler is called when there are control data to be read on the pipe
+ *
+ * @param cls the 'struct GNUNET_DISK_FileHandle' of the control pipe
+ * @param tc scheduler context
*/
-void
-GNUNET_OS_parent_control_handler (void *cls,
- const struct
- GNUNET_SCHEDULER_TaskContext * tc)
+static void
+parent_control_handler (void *cls,
+ const struct
+ GNUNET_SCHEDULER_TaskContext * tc)
{
struct GNUNET_DISK_FileHandle *control_pipe = (struct GNUNET_DISK_FileHandle *) cls;
int sig;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s' invoked because of %d\n", __FUNCTION__, tc->reason);
-
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "`%s' invoked because of %d\n",
+ __FUNCTION__,
+ tc->reason);
+#endif
if (tc->reason & (GNUNET_SCHEDULER_REASON_SHUTDOWN | GNUNET_SCHEDULER_REASON_TIMEOUT | GNUNET_SCHEDULER_REASON_PREREQ_DONE))
- {
- GNUNET_DISK_npipe_close (control_pipe);
- }
- else
- {
- if (GNUNET_DISK_file_read (control_pipe, &sig, sizeof (sig)) != sizeof (sig))
{
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "GNUNET_DISK_file_read");
GNUNET_DISK_npipe_close (control_pipe);
}
- else
+ else
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got control code %d from parent\n", sig);
- raise (sig);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Re-scheduling the parent control handler pipe\n");
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL, control_pipe, GNUNET_OS_parent_control_handler, control_pipe);
+ if (GNUNET_DISK_file_read (control_pipe,
+ &sig,
+ sizeof (sig)) != sizeof (sig))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
+ "GNUNET_DISK_file_read");
+ GNUNET_DISK_npipe_close (control_pipe);
+ }
+ else
+ {
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got control code %d from parent\n", sig);
+#endif
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ control_pipe,
+ &parent_control_handler, control_pipe);
+ raise (sig);
+ }
}
- }
}
+
/**
- * Connects this process to its parent via pipe
+ * Task that connects this process to its parent via pipe
*/
void
GNUNET_OS_install_parent_control_handler (void *cls,
const struct
GNUNET_SCHEDULER_TaskContext * tc)
{
- char *env_buf;
- struct GNUNET_DISK_FileHandle *control_pipe = NULL;
+ const char *env_buf;
+ struct GNUNET_DISK_FileHandle *control_pipe;
env_buf = getenv (GNUNET_OS_CONTROL_PIPE);
- if (env_buf == NULL || strlen (env_buf) <= 0)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not installing a handler because %s=%s\n", GNUNET_OS_CONTROL_PIPE, env_buf);
- return;
- }
-
- control_pipe = GNUNET_DISK_npipe_open (env_buf, GNUNET_DISK_OPEN_READ,
- GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
+ if ( (env_buf == NULL) || (strlen (env_buf) <= 0) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Not installing a handler because $%s=%s\n"),
+ GNUNET_OS_CONTROL_PIPE,
+ env_buf);
+ return;
+ }
+ control_pipe = GNUNET_DISK_npipe_open (env_buf,
+ GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
if (control_pipe == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to open the pipe `%s'\n", env_buf);
- return;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding parent control handler pipe `%s' to the scheduler\n", env_buf);
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL, control_pipe, GNUNET_OS_parent_control_handler, control_pipe);
+ {
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
+ "open",
+ env_buf);
+ return;
+ }
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding parent control handler pipe `%s' to the scheduler\n",
+ env_buf);
+#endif
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ control_pipe,
+ &parent_control_handler,
+ control_pipe);
}
+
/**
* Get process structure for current process
*
return ¤t_process;
}
+
int
GNUNET_OS_process_kill (struct GNUNET_OS_Process *proc, int sig)
{
#if ENABLE_WINDOWS_WORKAROUNDS
- int res;
- int ret;
+ int res = 0;
+ int ret = 0;
ret = GNUNET_DISK_file_write (proc->control_pipe, &sig, sizeof(sig));
if (ret != sizeof(sig))
{
if (errno == ECOMM)
+ {
/* Child process is not controllable via pipe */
+#if DEBUG_OS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Child process is not controllable, will kill it directly\n");
+#endif
+ }
+ else if (errno == EPIPE)
+ {
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to write into control pipe, because pipe is invalid (the child is most likely dead)\n");
+#endif
+ }
else
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Failed to write into control pipe , errno is %d\n", errno);
- res = PLIBC_KILL (proc->pid, sig);
+#if WINDOWS && !defined(__CYGWIN__)
+ TerminateProcess (proc->handle, 0);
+#else
+ PLIBC_KILL (proc->pid, sig);
+#endif
}
else
{
- struct GNUNET_NETWORK_FDSet *rfds;
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Wrote control code into control pipe, now waiting\n");
+#endif
+
+#if WINDOWS
+ /* Give it 3 seconds to die, then kill it in a nice Windows-specific way */
+ if (WaitForSingleObject (proc->handle, 3000) != WAIT_OBJECT_0)
+ TerminateProcess (proc->handle, 0);
+ res = 0;
+#else
+ struct GNUNET_NETWORK_FDSet *rfds;
struct GNUNET_NETWORK_FDSet *efds;
rfds = GNUNET_NETWORK_fdset_create ();
GNUNET_NETWORK_fdset_handle_set (rfds, proc->control_pipe);
GNUNET_NETWORK_fdset_handle_set (efds, proc->control_pipe);
- read_next:
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Wrote control code into control pipe, now waiting\n");
-
- ret = GNUNET_NETWORK_socket_select (rfds, NULL, efds,
- GNUNET_TIME_relative_multiply (GNUNET_TIME_relative_get_unit (),
- 5000));
-
- if (ret < 1 || GNUNET_NETWORK_fdset_handle_isset (efds,
- proc->control_pipe))
- {
- /* Just to be sure */
- PLIBC_KILL (proc->pid, sig);
- res = 0;
- }
- else
- {
- if (GNUNET_DISK_file_read (proc->control_pipe, &ret,
- sizeof(ret)) != GNUNET_OK)
- res = PLIBC_KILL (proc->pid, sig);
-
- /* Child signaled shutdown is in progress */
- goto read_next;
- }
- }
+ /* Ndurner thought this up, and i have no idea what it does.
+ * There's have never been any code to answer the shutdown call
+ * (write a single int into the pipe, so that this function can read it).
+ * On *nix select() will probably tell that pipe is ready
+ * for reading, once the other process shuts down,
+ * but the read () call will fail, triggering a kill ()
+ * on the pid that is already dead. This will probably result in non-0
+ * return from kill(), and therefore from this function.
+ */
+ while (1)
+ {
+ ret = GNUNET_NETWORK_socket_select (rfds, NULL, efds,
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_relative_get_unit (),
+ 5000));
- return res;
+ if (ret < 1 || GNUNET_NETWORK_fdset_handle_isset (efds,
+ proc->control_pipe))
+ {
+ /* Just to be sure */
+ PLIBC_KILL (proc->pid, sig);
+ res = 0;
+ break;
+ }
+ else
+ {
+ if (GNUNET_DISK_file_read (proc->control_pipe, &ret,
+ sizeof(ret)) != GNUNET_OK)
+ res = PLIBC_KILL (proc->pid, sig);
+
+ /* Child signaled shutdown is in progress */
+ continue;
+ }
+ }
+#endif
+ }
+
+ return res;
#else
return kill (proc->pid, sig);
#endif
return proc->pid;
}
+
void
GNUNET_OS_process_close (struct GNUNET_OS_Process *proc)
{
}
}
#else
+#if DEBUG_OS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
"Priority management not availabe for this platform\n");
+#endif
#endif
return GNUNET_OK;
}
return NULL;
for (c = 0, var_ptr = vars; *var_ptr; var_ptr += 2, c++);
n_var = c;
- index = GNUNET_malloc (n_var);
+ index = GNUNET_malloc (sizeof (char *) * n_var);
for (c = 0; c < n_var; c++)
index[c] = 0;
for (items_count = 0, ptr = win32_env_table; ptr[0] != 0; items_count++)
}
#endif
+
/**
* Start a process.
*
* @param pipe_stdin pipe to use to send input to child process (or NULL)
* @param pipe_stdout pipe to use to get output from child process (or NULL)
* @param filename name of the binary
- * @param ... NULL-terminated list of arguments to the process
+ * @param va NULL-terminated list of arguments to the process
* @return pointer to process structure of the new process, NULL on error
*/
struct GNUNET_OS_Process *
-GNUNET_OS_start_process (struct GNUNET_DISK_PipeHandle *pipe_stdin,
- struct GNUNET_DISK_PipeHandle *pipe_stdout,
- const char *filename, ...)
+GNUNET_OS_start_process_va (struct GNUNET_DISK_PipeHandle *pipe_stdin,
+ struct GNUNET_DISK_PipeHandle *pipe_stdout,
+ const char *filename,
+ va_list va)
{
va_list ap;
#if ENABLE_WINDOWS_WORKAROUNDS
#endif
argc = 0;
- va_start (ap, filename);
+ va_copy (ap, va);
while (NULL != va_arg (ap, char *))
argc++;
va_end (ap);
argv = GNUNET_malloc (sizeof (char *) * (argc + 1));
argc = 0;
- va_start (ap, filename);
+ va_copy (ap, va);
while (NULL != (argv[argc] = va_arg (ap, char *)))
argc++;
va_end (ap);
GNUNET_free (non_const_filename);
cmdlen = 0;
- va_start (ap, filename);
+ va_copy (ap, va);
while (NULL != (arg = va_arg (ap, char *)))
- {
+ {
if (cmdlen == 0)
cmdlen = cmdlen + strlen (path) + 3;
else
cmdlen = cmdlen + strlen (arg) + 3;
- }
+ }
va_end (ap);
cmd = idx = GNUNET_malloc (sizeof (char) * (cmdlen + 1));
- va_start (ap, filename);
+ va_copy (ap, va);
while (NULL != (arg = va_arg (ap, char *)))
{
if (idx == cmd)
return NULL;
}
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Opened the parent end of the pipe `%s'\n", childpipename);
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Opened the parent end of the pipe `%s'\n",
+ childpipename);
+#endif
GNUNET_asprintf (&our_env[0], "%s=", GNUNET_OS_CONTROL_PIPE);
GNUNET_asprintf (&our_env[1], "%s", childpipename);
return gnunet_proc;
#endif
-
}
+/**
+ * Start a process.
+ *
+ * @param pipe_stdin pipe to use to send input to child process (or NULL)
+ * @param pipe_stdout pipe to use to get output from child process (or NULL)
+ * @param filename name of the binary
+ * @param ... NULL-terminated list of arguments to the process
+ *
+ * @return pointer to process structure of the new process, NULL on error
+ *
+ */
+struct GNUNET_OS_Process *
+GNUNET_OS_start_process (struct GNUNET_DISK_PipeHandle *pipe_stdin,
+ struct GNUNET_DISK_PipeHandle *pipe_stdout,
+ const char *filename, ...)
+{
+ struct GNUNET_OS_Process *ret;
+ va_list ap;
+
+ va_start (ap, filename);
+ ret = GNUNET_OS_start_process_va (pipe_stdin,
+ pipe_stdout,
+ filename,
+ ap);
+ va_end (ap);
+ return ret;
+}
+
/**
* Start a process.
return NULL;
}
+#if DEBUG_OS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Opened the parent end of the pipe `%s'\n", childpipename);
+#endif
GNUNET_asprintf (&our_env[0], "%s=", GNUNET_OS_CONTROL_PIPE);
GNUNET_asprintf (&our_env[1], "%s", childpipename);
#endif
}
+
/**
* Retrieve the status of a process
* @param proc process ID
return GNUNET_OK;
}
+
/**
* Wait for a process
* @param proc pointer to process structure
}
+/**
+ * Handle to a command.
+ */
+struct GNUNET_OS_CommandHandle
+{
+
+ /**
+ * Process handle.
+ */
+ struct GNUNET_OS_Process *eip;
+
+ /**
+ * Handle to the output pipe.
+ */
+ struct GNUNET_DISK_PipeHandle *opipe;
+
+ /**
+ * Read-end of output pipe.
+ */
+ const struct GNUNET_DISK_FileHandle *r;
+
+ /**
+ * Function to call on each line of output.
+ */
+ GNUNET_OS_LineProcessor proc;
+
+ /**
+ * Closure for 'proc'.
+ */
+ void *proc_cls;
+
+ /**
+ * Buffer for the output.
+ */
+ char buf[1024];
+
+ /**
+ * Task reading from pipe.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier rtask;
+
+ /**
+ * When to time out.
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+ /**
+ * Current read offset in buf.
+ */
+ size_t off;
+};
+
+
+/**
+ * Stop/kill a command. Must ONLY be called either from
+ * the callback after 'NULL' was passed for 'line' *OR*
+ * from an independent task (not within the line processor).
+ *
+ * @param cmd handle to the process
+ */
+void
+GNUNET_OS_command_stop (struct GNUNET_OS_CommandHandle *cmd)
+{
+
+ if (cmd->proc != NULL)
+ {
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != cmd->rtask);
+ GNUNET_SCHEDULER_cancel (cmd->rtask);
+ }
+ (void) GNUNET_OS_process_kill (cmd->eip, SIGKILL);
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_OS_process_wait (cmd->eip));
+ GNUNET_OS_process_close (cmd->eip);
+ GNUNET_DISK_pipe_close (cmd->opipe);
+ GNUNET_free (cmd);
+}
+
+
+/**
+ * Read from the process and call the line processor.
+ *
+ * @param cls the 'struct GNUNET_OS_CommandHandle'
+ * @param tc scheduler context
+ */
+static void
+cmd_read (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_OS_CommandHandle *cmd = cls;
+ GNUNET_OS_LineProcessor proc;
+ char *end;
+ ssize_t ret;
+
+ cmd->rtask = GNUNET_SCHEDULER_NO_TASK;
+ if (GNUNET_YES !=
+ GNUNET_NETWORK_fdset_handle_isset (tc->read_ready,
+ cmd->r))
+ {
+ /* timeout, shutdown, etc. */
+ proc = cmd->proc;
+ cmd->proc = NULL;
+ proc (cmd->proc_cls, NULL);
+ return;
+ }
+ ret = GNUNET_DISK_file_read (cmd->r,
+ &cmd->buf[cmd->off],
+ sizeof (cmd->buf)-cmd->off);
+ if (ret <= 0)
+ {
+ if ( (cmd->off > 0) && (cmd->off < sizeof (cmd->buf)) )
+ {
+ cmd->buf[cmd->off] = '\0';
+ cmd->proc (cmd->proc_cls, cmd->buf);
+ }
+ proc = cmd->proc;
+ cmd->proc = NULL;
+ proc (cmd->proc_cls, NULL);
+ return;
+ }
+ end = memchr (&cmd->buf[cmd->off], '\n', ret);
+ cmd->off += ret;
+ while (end != NULL)
+ {
+ *end = '\0';
+ cmd->proc (cmd->proc_cls, cmd->buf);
+ memmove (cmd->buf,
+ end + 1,
+ cmd->off - (end + 1 - cmd->buf));
+ cmd->off -= (end + 1 - cmd->buf);
+ end = memchr (cmd->buf, '\n', cmd->off);
+ }
+ cmd->rtask = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_absolute_get_remaining (cmd->timeout),
+ cmd->r,
+ &cmd_read,
+ cmd);
+}
+
+
+/**
+ * Run the given command line and call the given function
+ * for each line of the output.
+ *
+ * @param proc function to call for each line of the output
+ * @param proc_cls closure for proc
+ * @param timeout when to time out
+ * @param binary command to run
+ * @param ... arguments to command
+ * @return NULL on error
+ */
+struct GNUNET_OS_CommandHandle *
+GNUNET_OS_command_run (GNUNET_OS_LineProcessor proc,
+ void *proc_cls,
+ struct GNUNET_TIME_Relative timeout,
+ const char *binary,
+ ...)
+{
+ struct GNUNET_OS_CommandHandle *cmd;
+ struct GNUNET_OS_Process *eip;
+ struct GNUNET_DISK_PipeHandle *opipe;
+ va_list ap;
+
+ opipe = GNUNET_DISK_pipe (GNUNET_YES,
+ GNUNET_NO,
+ GNUNET_YES);
+ if (NULL == opipe)
+ return NULL;
+ va_start (ap, binary);
+ eip = GNUNET_OS_start_process_va (NULL, opipe,
+ binary, ap);
+ va_end (ap);
+ if (NULL == eip)
+ {
+ GNUNET_DISK_pipe_close (opipe);
+ return NULL;
+ }
+ GNUNET_DISK_pipe_close_end (opipe, GNUNET_DISK_PIPE_END_WRITE);
+ cmd = GNUNET_malloc (sizeof (struct GNUNET_OS_CommandHandle));
+ cmd->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ cmd->eip = eip;
+ cmd->opipe = opipe;
+ cmd->proc = proc;
+ cmd->proc_cls = proc_cls;
+ cmd->r = GNUNET_DISK_pipe_handle (opipe,
+ GNUNET_DISK_PIPE_END_READ);
+ cmd->rtask = GNUNET_SCHEDULER_add_read_file (timeout,
+ cmd->r,
+ &cmd_read,
+ cmd);
+ return cmd;
+}
+
+
+
+
/* end of os_priority.c */
projects / oweals / gnunet.git / blobdiff