/*
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
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_os_lib.h"
+#include "gnunet_scheduler_lib.h"
#include "disk.h"
+#define GNUNET_OS_CONTROL_PIPE "GNUNET_OS_CONTROL_PIPE"
+
+struct GNUNET_OS_Process
+{
+ pid_t pid;
+#if WINDOWS
+ HANDLE handle;
+#endif
+ int sig;
+ struct GNUNET_DISK_FileHandle *control_pipe;
+};
+
+static struct GNUNET_OS_Process current_process;
+
+
+/**
+ * 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
+ */
+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;
+
+#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
+ {
+#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);
+ }
+ }
+}
+
+
+/**
+ * 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)
+{
+ 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_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_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
+ *
+ * The pointer it returns points to static memory location and must not be
+ * deallocated/closed
+ *
+ * @return pointer to the process sturcutre for this process
+ */
+struct GNUNET_OS_Process *
+GNUNET_OS_process_current ()
+{
+#if WINDOWS
+ current_process.pid = GetCurrentProcessId ();
+ current_process.handle = GetCurrentProcess ();
+#else
+ current_process.pid = 0;
+#endif
+ return ¤t_process;
+}
+
+
+int
+GNUNET_OS_process_kill (struct GNUNET_OS_Process *proc, int sig)
+{
+#if ENABLE_WINDOWS_WORKAROUNDS
+ 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_WARNING,
+ "Failed to write into control pipe , errno is %d\n", errno);
+#if WINDOWS && !defined(__CYGWIN__)
+ TerminateProcess (proc->handle, 0);
+#else
+ PLIBC_KILL (proc->pid, sig);
+#endif
+ }
+ else
+ {
+#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 ();
+ efds = GNUNET_NETWORK_fdset_create ();
+
+ GNUNET_NETWORK_fdset_handle_set (rfds, proc->control_pipe);
+ GNUNET_NETWORK_fdset_handle_set (efds, proc->control_pipe);
+
+ /* 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));
+
+ 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
+}
+
+/**
+ * Get the pid of the process in question
+ *
+ * @param proc the process to get the pid of
+ *
+ * @return the current process id
+ */
+pid_t
+GNUNET_OS_process_get_pid (struct GNUNET_OS_Process *proc)
+{
+ return proc->pid;
+}
+
+
+void
+GNUNET_OS_process_close (struct GNUNET_OS_Process *proc)
+{
+#if ENABLE_WINDOWS_WORKAROUNDS
+ if (proc->control_pipe)
+ GNUNET_DISK_npipe_close (proc->control_pipe);
+#endif
+// FIXME NILS
+#ifdef WINDOWS
+ if (proc->handle != NULL)
+ CloseHandle (proc->handle);
+#endif
+ GNUNET_free (proc);
+}
+
+// FIXME NILS
#if WINDOWS
#include "gnunet_signal_lib.h"
extern GNUNET_SIGNAL_Handler w32_sigchld_handler;
+/**
+ * Make seaspider happy.
+ */
+#define DWORD_WINAPI DWORD WINAPI
+
/**
* @brief Waits for a process to terminate and invokes the SIGCHLD handler
- * @param h handle to the process
+ * @param proc pointer to process structure
*/
-static DWORD WINAPI
-ChildWaitThread (HANDLE h)
+static DWORD_WINAPI
+ChildWaitThread (void *arg)
{
- WaitForSingleObject (h, INFINITE);
+ struct GNUNET_OS_Process *proc = (struct GNUNET_OS_Process *) arg;
+ WaitForSingleObject (proc->handle, INFINITE);
if (w32_sigchld_handler)
w32_sigchld_handler ();
- CloseHandle (h);
+ return 0;
}
#endif
/**
* Set process priority
*
- * @param proc id of the process
+ * @param proc pointer to process structure
* @param prio priority value
* @return GNUNET_OK on success, GNUNET_SYSERR on error
*/
int
-GNUNET_OS_set_process_priority (pid_t proc,
+GNUNET_OS_set_process_priority (struct GNUNET_OS_Process *proc,
enum GNUNET_SCHEDULER_Priority prio)
{
int rprio;
GNUNET_assert (prio < GNUNET_SCHEDULER_PRIORITY_COUNT);
if (prio == GNUNET_SCHEDULER_PRIORITY_KEEP)
return GNUNET_OK;
+
/* convert to MINGW/Unix values */
switch (prio)
{
GNUNET_assert (0);
return GNUNET_SYSERR;
}
+
/* Set process priority */
#ifdef MINGW
- SetPriorityClass (GetCurrentProcess (), rprio);
+ {
+ HANDLE h = proc->handle;
+ GNUNET_assert (h != NULL);
+ SetPriorityClass (h, rprio);
+ }
#elif LINUX
- if ( (0 == proc) ||
- (proc == getpid () ) )
+ pid_t pid;
+
+ pid = proc->pid;
+ if ( (0 == pid) ||
+ (pid == getpid () ) )
{
int have = nice (0);
int delta = rprio - have;
}
else
{
- if (0 != setpriority (PRIO_PROCESS, proc, rprio))
-
+ if (0 != setpriority (PRIO_PROCESS, pid, rprio))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
GNUNET_ERROR_TYPE_BULK, "setpriority");
}
}
#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;
}
+#if MINGW
+static char *
+CreateCustomEnvTable (char **vars)
+{
+ char *win32_env_table, *ptr, **var_ptr, *result, *result_ptr;
+ size_t tablesize = 0;
+ size_t items_count = 0;
+ size_t n_found = 0, n_var;
+ char *index = NULL;
+ size_t c;
+ size_t var_len;
+ char *var;
+ char *val;
+ win32_env_table = GetEnvironmentStringsA ();
+ if (win32_env_table == NULL)
+ return NULL;
+ for (c = 0, var_ptr = vars; *var_ptr; var_ptr += 2, c++);
+ n_var = c;
+ 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++)
+ {
+ size_t len = strlen (ptr);
+ int found = 0;
+ for (var_ptr = vars; *var_ptr; var_ptr++)
+ {
+ var = *var_ptr++;
+ val = *var_ptr;
+ var_len = strlen (var);
+ if (strncmp (var, ptr, var_len) == 0)
+ {
+ found = 1;
+ index[c] = 1;
+ tablesize += var_len + strlen (val) + 1;
+ break;
+ }
+ }
+ if (!found)
+ tablesize += len + 1;
+ ptr += len + 1;
+ }
+ for (n_found = 0, c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
+ {
+ var = *var_ptr++;
+ val = *var_ptr;
+ if (index[c] != 1)
+ n_found += strlen (var) + strlen (val) + 1;
+ }
+ result = GNUNET_malloc (tablesize + n_found + 1);
+ for (result_ptr = result, ptr = win32_env_table; ptr[0] != 0;)
+ {
+ size_t len = strlen (ptr);
+ int found = 0;
+ for (c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
+ {
+ var = *var_ptr++;
+ val = *var_ptr;
+ var_len = strlen (var);
+ if (strncmp (var, ptr, var_len) == 0)
+ {
+ found = 1;
+ break;
+ }
+ }
+ if (!found)
+ {
+ strcpy (result_ptr, ptr);
+ result_ptr += len + 1;
+ }
+ else
+ {
+ strcpy (result_ptr, var);
+ result_ptr += var_len;
+ strcpy (result_ptr, val);
+ result_ptr += strlen (val) + 1;
+ }
+ ptr += len + 1;
+ }
+ for (c = 0, var_ptr = vars; *var_ptr; var_ptr++, c++)
+ {
+ var = *var_ptr++;
+ val = *var_ptr;
+ var_len = strlen (var);
+ if (index[c] != 1)
+ {
+ strcpy (result_ptr, var);
+ result_ptr += var_len;
+ strcpy (result_ptr, val);
+ result_ptr += strlen (val) + 1;
+ }
+ }
+ FreeEnvironmentStrings (win32_env_table);
+ GNUNET_free (index);
+ *result_ptr = 0;
+ return result;
+}
+#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 process ID of the new process, -1 on error
+ * @param va NULL-terminated list of arguments to the process
+ * @return pointer to process structure of the new process, NULL on error
*/
-pid_t
-GNUNET_OS_start_process (struct GNUNET_DISK_PipeHandle *pipe_stdin,
- struct GNUNET_DISK_PipeHandle *pipe_stdout,
- const char *filename, ...)
+struct GNUNET_OS_Process *
+GNUNET_OS_start_process_va (struct GNUNET_DISK_PipeHandle *pipe_stdin,
+ struct GNUNET_DISK_PipeHandle *pipe_stdout,
+ const char *filename,
+ va_list va)
{
- /* FIXME: Make this work on windows!!! */
va_list ap;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ char *childpipename = NULL;
+ struct GNUNET_DISK_FileHandle *control_pipe = NULL;
+#endif
+ struct GNUNET_OS_Process *gnunet_proc = NULL;
#ifndef MINGW
pid_t ret;
int fd_stdin_read;
int fd_stdin_write;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ control_pipe = GNUNET_DISK_npipe_create (&childpipename,
+ GNUNET_DISK_OPEN_WRITE, GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (control_pipe == NULL)
+ return NULL;
+#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);
if (ret == -1)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
+#if ENABLE_WINDOWS_WORKAROUNDS
+ GNUNET_DISK_npipe_close (control_pipe);
+#endif
}
else
{
if (pipe_stdin != NULL)
GNUNET_DISK_pipe_close_end(pipe_stdin, GNUNET_DISK_PIPE_END_READ);
sleep (1);
+#endif
+ gnunet_proc = GNUNET_malloc (sizeof (struct GNUNET_OS_Process));
+ gnunet_proc->pid = ret;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ gnunet_proc->control_pipe = control_pipe;
#endif
}
GNUNET_free (argv);
- return ret;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ GNUNET_free (childpipename);
+#endif
+ return gnunet_proc;
}
+#if ENABLE_WINDOWS_WORKAROUNDS
+ setenv (GNUNET_OS_CONTROL_PIPE, childpipename, 1);
+ GNUNET_free (childpipename);
+#endif
+
if (pipe_stdout != NULL)
{
GNUNET_break (0 == close (fd_stdout_read));
char *cmd, *idx;
STARTUPINFO start;
PROCESS_INFORMATION proc;
-#if NILS
+
HANDLE stdin_handle;
HANDLE stdout_handle;
-#endif
- char *fn;
- int len;
+
char path[MAX_PATH + 1];
+ char *our_env[3] = { NULL, NULL, NULL };
+ char *env_block = NULL;
+ char *pathbuf;
+ DWORD pathbuf_len, alloc_len;
+ char *self_prefix;
+ char *bindir;
+ char *libdir;
+ char *ptr;
+ char *non_const_filename;
+
+ /* Search in prefix dir (hopefully - the directory from which
+ * the current module was loaded), bindir and libdir, then in PATH
+ */
+ self_prefix = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_SELF_PREFIX);
+ bindir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
+ libdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR);
+
+ pathbuf_len = GetEnvironmentVariableA ("PATH", (char *) &pathbuf, 0);
+
+ alloc_len = pathbuf_len + 1 + strlen (self_prefix) + 1 + strlen (bindir) + 1 + strlen (libdir);
+
+ pathbuf = GNUNET_malloc (alloc_len * sizeof (char));
+
+ ptr = pathbuf;
+ ptr += sprintf (pathbuf, "%s;%s;%s;", self_prefix, bindir, libdir);
+ GNUNET_free (self_prefix);
+ GNUNET_free (bindir);
+ GNUNET_free (libdir);
+
+ alloc_len = GetEnvironmentVariableA ("PATH", ptr, pathbuf_len);
+ GNUNET_assert (alloc_len == (pathbuf_len - 1));
+
+ cmdlen = strlen (filename);
+ if (cmdlen < 5 || strcmp (&filename[cmdlen - 4], ".exe") != 0)
+ GNUNET_asprintf (&non_const_filename, "%s.exe", filename);
+ else
+ GNUNET_asprintf (&non_const_filename, "%s", filename);
+
+ /* Check that this is the full path. If it isn't, search. */
+ if (non_const_filename[1] == ':')
+ snprintf (path, sizeof (path) / sizeof (char), "%s", non_const_filename);
+ else if (!SearchPathA (pathbuf, non_const_filename, NULL, sizeof (path) / sizeof (char), path, NULL))
+ {
+ SetErrnoFromWinError (GetLastError ());
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "SearchPath", non_const_filename);
+ GNUNET_free (non_const_filename);
+ GNUNET_free (pathbuf);
+ return NULL;
+ }
+ GNUNET_free (pathbuf);
+ GNUNET_free (non_const_filename);
+
cmdlen = 0;
- va_start (ap, filename);
+ va_copy (ap, va);
while (NULL != (arg = va_arg (ap, char *)))
- cmdlen = cmdlen + strlen (arg) + 3;
+ {
+ if (cmdlen == 0)
+ cmdlen = cmdlen + strlen (path) + 3;
+ else
+ cmdlen = cmdlen + strlen (arg) + 3;
+ }
va_end (ap);
- cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
- va_start (ap, filename);
+ cmd = idx = GNUNET_malloc (sizeof (char) * (cmdlen + 1));
+ va_copy (ap, va);
while (NULL != (arg = va_arg (ap, char *)))
- idx += sprintf (idx, "\"%s\" ", arg);
+ {
+ if (idx == cmd)
+ idx += sprintf (idx, "\"%s\" ", path);
+ else
+ idx += sprintf (idx, "\"%s\" ", arg);
+ }
va_end (ap);
memset (&start, 0, sizeof (start));
start.cb = sizeof (start);
-#if NILS
if ((pipe_stdin != NULL) || (pipe_stdout != NULL))
start.dwFlags |= STARTF_USESTDHANDLES;
GNUNET_DISK_internal_file_handle_ (GNUNET_DISK_pipe_handle(pipe_stdout, GNUNET_DISK_PIPE_END_WRITE), &stdout_handle, sizeof (HANDLE));
start.hStdOutput = stdout_handle;
}
+
+ control_pipe = GNUNET_DISK_npipe_create (&childpipename,
+ GNUNET_DISK_OPEN_WRITE, GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (control_pipe == NULL)
+ {
+ GNUNET_free (cmd);
+ GNUNET_free (path);
+ return NULL;
+ }
+
+#if DEBUG_OS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Opened the parent end of the pipe `%s'\n",
+ childpipename);
#endif
- if (FindExecutable(filename, NULL, path) <= 32)
- {
- SetErrnoFromWinError (GetLastError ());
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "FindExecutable", fn);
- return -1;
- }
- if (!CreateProcess
- (path, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &start,
- &proc))
+ GNUNET_asprintf (&our_env[0], "%s=", GNUNET_OS_CONTROL_PIPE);
+ GNUNET_asprintf (&our_env[1], "%s", childpipename);
+ our_env[2] = NULL;
+ env_block = CreateCustomEnvTable (our_env);
+ GNUNET_free (our_env[0]);
+ GNUNET_free (our_env[1]);
+
+ if (!CreateProcessA
+ (path, cmd, NULL, NULL, TRUE, DETACHED_PROCESS | CREATE_SUSPENDED,
+ env_block, NULL, &start, &proc))
{
SetErrnoFromWinError (GetLastError ());
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "CreateProcess", fn);
- return -1;
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "CreateProcess", path);
+ GNUNET_free (env_block);
+ GNUNET_free (cmd);
+ return NULL;
}
- CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
+ GNUNET_free (env_block);
- if (fn != filename)
- GNUNET_free (fn);
+ gnunet_proc = GNUNET_malloc (sizeof (struct GNUNET_OS_Process));
+ gnunet_proc->pid = proc.dwProcessId;
+ gnunet_proc->handle = proc.hProcess;
+ gnunet_proc->control_pipe = control_pipe;
+
+ CreateThread (NULL, 64000, ChildWaitThread, (void *) gnunet_proc, 0, NULL);
+
+ ResumeThread (proc.hThread);
CloseHandle (proc.hThread);
GNUNET_free (cmd);
- return proc.dwProcessId;
+ 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.
*
+ * @param lsocks array of listen sockets to dup systemd-style (or NULL);
+ * must be NULL on platforms where dup is not supported
* @param filename name of the binary
* @param argv NULL-terminated list of arguments to the process
* @return process ID of the new process, -1 on error
*/
-pid_t
-GNUNET_OS_start_process_v (const char *filename, char *const argv[])
+struct GNUNET_OS_Process *
+GNUNET_OS_start_process_v (const int *lsocks,
+ const char *filename, char *const argv[])
{
+#if ENABLE_WINDOWS_WORKAROUNDS
+ struct GNUNET_DISK_FileHandle *control_pipe = NULL;
+ char *childpipename = NULL;
+#endif
+
#ifndef MINGW
pid_t ret;
+ char lpid[16];
+ char fds[16];
+ struct GNUNET_OS_Process *gnunet_proc = NULL;
+ int i;
+ int j;
+ int k;
+ int tgt;
+ int flags;
+ int *lscp;
+ unsigned int ls;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ control_pipe = GNUNET_DISK_npipe_create (&childpipename,
+ GNUNET_DISK_OPEN_WRITE, GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (control_pipe == NULL)
+ return NULL;
+#endif
+
+ lscp = NULL;
+ ls = 0;
+ if (lsocks != NULL)
+ {
+ i = 0;
+ while (-1 != (k = lsocks[i++]))
+ GNUNET_array_append (lscp, ls, k);
+ GNUNET_array_append (lscp, ls, -1);
+ }
#if HAVE_WORKING_VFORK
ret = vfork ();
#else
if (ret == -1)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
+#if ENABLE_WINDOWS_WORKAROUNDS
+ GNUNET_DISK_npipe_close (control_pipe);
+#endif
}
else
{
/* let's give the child process a chance to run execvp, 1s should
be plenty in practice */
sleep (1);
+#endif
+ gnunet_proc = GNUNET_malloc (sizeof (struct GNUNET_OS_Process));
+ gnunet_proc->pid = ret;
+#if ENABLE_WINDOWS_WORKAROUNDS
+ gnunet_proc->control_pipe = control_pipe;
+
#endif
}
- return ret;
+ GNUNET_array_grow (lscp, ls, 0);
+#if ENABLE_WINDOWS_WORKAROUNDS
+ GNUNET_free (childpipename);
+#endif
+ return gnunet_proc;
+ }
+
+#if ENABLE_WINDOWS_WORKAROUNDS
+ setenv (GNUNET_OS_CONTROL_PIPE, childpipename, 1);
+ GNUNET_free (childpipename);
+#endif
+
+ if (lscp != NULL)
+ {
+ /* read systemd documentation... */
+ GNUNET_snprintf (lpid, sizeof (lpid), "%u", getpid());
+ setenv ("LISTEN_PID", lpid, 1);
+ i = 0;
+ tgt = 3;
+ while (-1 != lscp[i])
+ {
+ j = i + 1;
+ while (-1 != lscp[j])
+ {
+ if (lscp[j] == tgt)
+ {
+ /* dup away */
+ k = dup (lscp[j]);
+ GNUNET_assert (-1 != k);
+ GNUNET_assert (0 == close (lscp[j]));
+ lscp[j] = k;
+ break;
+ }
+ j++;
+ }
+ if (lscp[i] != tgt)
+ {
+ /* Bury any existing FD, no matter what; they should all be closed
+ on exec anyway and the important onces have been dup'ed away */
+ (void) close (tgt);
+ GNUNET_assert (-1 != dup2 (lscp[i], tgt));
+ }
+ /* unset close-on-exec flag */
+ flags = fcntl (tgt, F_GETFD);
+ GNUNET_assert (flags >= 0);
+ flags &= ~FD_CLOEXEC;
+ fflush (stderr);
+ (void) fcntl (tgt, F_SETFD, flags);
+ tgt++;
+ i++;
+ }
+ GNUNET_snprintf (fds, sizeof (fds), "%u", i);
+ setenv ("LISTEN_FDS", fds, 1);
}
+ GNUNET_array_grow (lscp, ls, 0);
execvp (filename, argv);
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "execvp", filename);
_exit (1);
#else
- char **arg;
+ char **arg, **non_const_argv;
unsigned int cmdlen;
char *cmd, *idx;
STARTUPINFO start;
PROCESS_INFORMATION proc;
+ int argcount = 0;
+ struct GNUNET_OS_Process *gnunet_proc = NULL;
- cmdlen = 0;
- arg = argv;
+ char path[MAX_PATH + 1];
+
+ char *our_env[3] = { NULL, NULL, NULL };
+ char *env_block = NULL;
+ char *pathbuf;
+ DWORD pathbuf_len, alloc_len;
+ char *self_prefix;
+ char *bindir;
+ char *libdir;
+ char *ptr;
+ char *non_const_filename;
+
+ GNUNET_assert (lsocks == NULL);
+
+ /* Search in prefix dir (hopefully - the directory from which
+ * the current module was loaded), bindir and libdir, then in PATH
+ */
+ self_prefix = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_SELF_PREFIX);
+ bindir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
+ libdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR);
+
+ pathbuf_len = GetEnvironmentVariableA ("PATH", (char *) &pathbuf, 0);
+
+ alloc_len = pathbuf_len + 1 + strlen (self_prefix) + 1 + strlen (bindir) + 1 + strlen (libdir);
+
+ pathbuf = GNUNET_malloc (alloc_len * sizeof (char));
+
+ ptr = pathbuf;
+ ptr += sprintf (pathbuf, "%s;%s;%s;", self_prefix, bindir, libdir);
+ GNUNET_free (self_prefix);
+ GNUNET_free (bindir);
+ GNUNET_free (libdir);
+
+ alloc_len = GetEnvironmentVariableA ("PATH", ptr, pathbuf_len);
+ if (alloc_len != pathbuf_len - 1)
+ {
+ GNUNET_free (pathbuf);
+ errno = ENOSYS; /* PATH changed on the fly. What kind of error is that? */
+ return NULL;
+ }
+
+ cmdlen = strlen (filename);
+ if (cmdlen < 5 || strcmp (&filename[cmdlen - 4], ".exe") != 0)
+ GNUNET_asprintf (&non_const_filename, "%s.exe", filename);
+ else
+ GNUNET_asprintf (&non_const_filename, "%s", filename);
+
+ /* Check that this is the full path. If it isn't, search. */
+ if (non_const_filename[1] == ':')
+ snprintf (path, sizeof (path) / sizeof (char), "%s", non_const_filename);
+ else if (!SearchPathA (pathbuf, non_const_filename, NULL, sizeof (path) / sizeof (char), path, NULL))
+ {
+ SetErrnoFromWinError (GetLastError ());
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "SearchPath", non_const_filename);
+ GNUNET_free (non_const_filename);
+ GNUNET_free (pathbuf);
+ return NULL;
+ }
+ GNUNET_free (pathbuf);
+ GNUNET_free (non_const_filename);
+
+ /* Count the number of arguments */
+ arg = (char **) argv;
+ while (*arg)
+ {
+ arg++;
+ argcount++;
+ }
+
+ /* Allocate a copy argv */
+ non_const_argv = GNUNET_malloc (sizeof (char *) * (argcount + 1));
+
+ /* Copy all argv strings */
+ argcount = 0;
+ arg = (char **) argv;
+ while (*arg)
+ {
+ if (arg == argv)
+ non_const_argv[argcount] = GNUNET_strdup (path);
+ else
+ non_const_argv[argcount] = GNUNET_strdup (*arg);
+ arg++;
+ argcount++;
+ }
+ non_const_argv[argcount] = NULL;
+
+ /* Count cmd len */
+ cmdlen = 1;
+ arg = non_const_argv;
while (*arg)
{
cmdlen = cmdlen + strlen (*arg) + 3;
arg++;
}
+ /* Allocate and create cmd */
cmd = idx = GNUNET_malloc (sizeof (char) * cmdlen);
- arg = argv;
+ arg = non_const_argv;
while (*arg)
{
idx += sprintf (idx, "\"%s\" ", *arg);
arg++;
}
+ while (argcount > 0)
+ GNUNET_free (non_const_argv[--argcount]);
+ GNUNET_free (non_const_argv);
+
memset (&start, 0, sizeof (start));
start.cb = sizeof (start);
+ control_pipe = GNUNET_DISK_npipe_create (&childpipename,
+ GNUNET_DISK_OPEN_WRITE, GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (control_pipe == NULL)
+ {
+ GNUNET_free (cmd);
+ GNUNET_free (path);
+ 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);
+ our_env[2] = NULL;
+ env_block = CreateCustomEnvTable (our_env);
+ GNUNET_free (our_env[0]);
+ GNUNET_free (our_env[1]);
+
if (!CreateProcess
- (filename, cmd, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &start,
- &proc))
+ (path, cmd, NULL, NULL, FALSE, DETACHED_PROCESS | CREATE_SUSPENDED,
+ env_block, NULL, &start, &proc))
{
SetErrnoFromWinError (GetLastError ());
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
- return -1;
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "CreateProcess");
+ GNUNET_free (env_block);
+ GNUNET_free (cmd);
+ return NULL;
}
- CreateThread (NULL, 64000, ChildWaitThread, proc.hProcess, 0, NULL);
+ GNUNET_free (env_block);
+
+ gnunet_proc = GNUNET_malloc (sizeof (struct GNUNET_OS_Process));
+ gnunet_proc->pid = proc.dwProcessId;
+ gnunet_proc->handle = proc.hProcess;
+ gnunet_proc->control_pipe = control_pipe;
+ CreateThread (NULL, 64000, ChildWaitThread, (void *) gnunet_proc, 0, NULL);
+
+ ResumeThread (proc.hThread);
CloseHandle (proc.hThread);
GNUNET_free (cmd);
- return proc.dwProcessId;
+ return gnunet_proc;
#endif
}
+
/**
* Retrieve the status of a process
* @param proc process ID
* @return GNUNET_OK on success, GNUNET_NO if the process is still running, GNUNET_SYSERR otherwise
*/
int
-GNUNET_OS_process_status (pid_t proc, enum GNUNET_OS_ProcessStatusType *type,
+GNUNET_OS_process_status (struct GNUNET_OS_Process *proc,
+ enum GNUNET_OS_ProcessStatusType *type,
unsigned long *code)
{
#ifndef MINGW
int ret;
GNUNET_assert (0 != proc);
- ret = waitpid (proc, &status, WNOHANG);
+ ret = waitpid (proc->pid, &status, WNOHANG);
if (ret < 0)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
*code = 0;
return GNUNET_NO;
}
- if (proc != ret)
+ if (proc->pid != ret)
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "waitpid");
return GNUNET_SYSERR;
}
#else
HANDLE h;
- DWORD c;
+ DWORD c, error_code, ret;
- h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
- if (INVALID_HANDLE_VALUE == h)
+ h = proc->handle;
+ ret = proc->pid;
+ if (h == NULL || ret == 0)
{
- SetErrnoFromWinError (GetLastError ());
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "OpenProcess");
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Invalid process information {%d, %08X}\n", ret, h);
return GNUNET_SYSERR;
}
+ if (h == NULL)
+ h = GetCurrentProcess ();
- c = GetExitCodeProcess (proc, &c);
+ SetLastError (0);
+ ret = GetExitCodeProcess (h, &c);
+ error_code = GetLastError ();
+ if (ret == 0 || error_code != NO_ERROR)
+ {
+ SetErrnoFromWinError (error_code);
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "GetExitCodeProcess");
+ return GNUNET_SYSERR;
+ }
if (STILL_ACTIVE == c)
{
*type = GNUNET_OS_PROCESS_RUNNING;
*code = 0;
- CloseHandle (h);
return GNUNET_NO;
}
*type = GNUNET_OS_PROCESS_EXITED;
*code = c;
- CloseHandle (h);
#endif
return GNUNET_OK;
}
+
/**
* Wait for a process
- * @param proc process ID to wait for
+ * @param proc pointer to process structure
* @return GNUNET_OK on success, GNUNET_SYSERR otherwise
*/
int
-GNUNET_OS_process_wait (pid_t proc)
+GNUNET_OS_process_wait (struct GNUNET_OS_Process *proc)
{
+
#ifndef MINGW
- if (proc != waitpid (proc, NULL, 0))
+ pid_t pid = proc->pid;
+ if (pid != waitpid (pid, NULL, 0))
return GNUNET_SYSERR;
-
return GNUNET_OK;
#else
HANDLE h;
- DWORD c;
int ret;
- h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, proc);
- if (INVALID_HANDLE_VALUE == h)
+ h = proc->handle;
+ if (NULL == h)
{
- SetErrnoFromWinError (GetLastError ());
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Invalid process information {%d, %08X}\n",
+ proc->pid,
+ h);
return GNUNET_SYSERR;
}
+ if (h == NULL)
+ h = GetCurrentProcess ();
if (WAIT_OBJECT_0 != WaitForSingleObject (h, INFINITE))
{
else
ret = GNUNET_OK;
- CloseHandle (h);
-
return ret;
#endif
}
+/**
+ * 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