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authorAnas Nashif <anas.nashif@intel.com>2013-02-19 16:22:18 (GMT)
committerAnas Nashif <anas.nashif@intel.com>2013-02-19 16:22:18 (GMT)
commit26fb537f9cf011eaeaf975adcad5e8e9154d04fd (patch)
treeddc2171273fca8b730b9c496e1b5ed3b01878577 /src/w32-qt-io.cpp
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Imported Upstream version 1.3.2upstream/1.3.2upstream
Diffstat (limited to 'src/w32-qt-io.cpp')
-rw-r--r--src/w32-qt-io.cpp699
1 files changed, 699 insertions, 0 deletions
diff --git a/src/w32-qt-io.cpp b/src/w32-qt-io.cpp
new file mode 100644
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--- /dev/null
+++ b/src/w32-qt-io.cpp
@@ -0,0 +1,699 @@
+/* w32-qt-io.c - W32 Glib I/O functions
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2004, 2005, 2007 g10 Code GmbH
+
+ This file is part of GPGME.
+
+ GPGME is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of
+ the License, or (at your option) any later version.
+
+ GPGME is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <windows.h>
+#include <io.h>
+
+#include "kdpipeiodevice.h"
+
+extern "C"
+{
+#include "util.h"
+#include "priv-io.h"
+#include "sema.h"
+#include "debug.h"
+}
+
+#ifndef O_BINARY
+#ifdef _O_BINARY
+#define O_BINARY _O_BINARY
+#else
+#define O_BINARY 0
+#endif
+#endif
+
+using _gpgme_::KDPipeIODevice;
+
+
+/* This file is an ugly hack to get GPGME working with Qt on Windows
+ targets. On Windows, you can not select() on file descriptors.
+
+ The only way to check if there is something to read is to read
+ something. This means that GPGME can not let Qt check for data
+ without letting Qt also handle the data on Windows targets.
+
+ The ugly consequence is that we need to work on QIODevices in
+ GPGME, creating a Qt dependency. Also, we need to export an
+ interface for the application to get at GPGME's QIODevices. There
+ is no good way to abstract all this with callbacks, because the
+ whole thing is also interconnected with the creation of pipes and
+ child processes.
+
+ The following rule applies only to this I/O backend:
+
+ * ALL operations must use the user defined event loop. GPGME can
+ not anymore provide its own event loop. This is mostly a sanity
+ requirement: Although we have in theory all information we need to
+ make the GPGME W32 code for select still work, it would be a big
+ complication and require changes throughout GPGME.
+
+ Eventually, we probably have to bite the bullet and make some
+ really nice callback interfaces to let the user control all this at
+ a per-context level. */
+
+#define MAX_SLAFD 1024
+
+struct DeviceEntry {
+ DeviceEntry() : iodev( 0 ), refCount( 1 ), blocking( true ) {}
+ KDPipeIODevice* iodev;
+ bool blocking;
+ mutable int refCount;
+ void ref() const { ++refCount; }
+ int unref() const { assert( refCount > 0 ); return --refCount; }
+};
+
+DeviceEntry* iodevice_table[MAX_SLAFD];
+
+
+static KDPipeIODevice *
+find_channel (int fd, int create)
+{
+ assert( fd < MAX_SLAFD );
+ if (fd < 0 || fd >= MAX_SLAFD)
+ return NULL;
+
+ if (create && !iodevice_table[fd])
+ {
+ DeviceEntry* entry = new DeviceEntry;
+ entry->iodev = new KDPipeIODevice
+ (fd, QIODevice::ReadWrite|QIODevice::Unbuffered);
+ iodevice_table[fd] = entry;
+ }
+ return iodevice_table[fd] ? iodevice_table[fd]->iodev : 0;
+}
+
+/* Write the printable version of FD to the buffer BUF of length
+ BUFLEN. The printable version is the representation on the command
+ line that the child process expects. */
+int
+_gpgme_io_fd2str (char *buf, int buflen, int fd)
+{
+ return snprintf (buf, buflen, "%d", (long)_get_osfhandle( fd ) );
+}
+
+
+void
+_gpgme_io_subsystem_init (void)
+{
+}
+
+
+static struct
+{
+ _gpgme_close_notify_handler_t handler;
+ void *value;
+} notify_table[MAX_SLAFD];
+
+
+int
+_gpgme_io_read (int fd, void *buffer, size_t count)
+{
+ int saved_errno = 0;
+ qint64 nread;
+ KDPipeIODevice *chan;
+ TRACE_BEG2 (DEBUG_SYSIO, "_gpgme_io_read", fd,
+ "buffer=%p, count=%u", buffer, count);
+
+ chan = find_channel (fd, 0);
+ if (!chan)
+ {
+ TRACE_LOG ("no channel registered");
+ errno = EINVAL;
+ return TRACE_SYSRES (-1);
+ }
+ TRACE_LOG1 ("channel %p", chan);
+ if ( iodevice_table[fd] && !iodevice_table[fd]->blocking && chan->readWouldBlock() ) {
+ errno = EAGAIN;
+ return TRACE_SYSRES( -1 );
+ }
+
+ nread = chan->read ((char *) buffer, count);
+ if (nread < 0)
+ {
+ TRACE_LOG1 ("err %s", qPrintable (chan->errorString ()));
+ saved_errno = EIO;
+ nread = -1;
+ }
+
+ TRACE_LOGBUF ((char *) buffer, nread);
+
+ errno = saved_errno;
+ return TRACE_SYSRES (nread);
+}
+
+
+int
+_gpgme_io_write (int fd, const void *buffer, size_t count)
+{
+ qint64 nwritten;
+ KDPipeIODevice *chan;
+ TRACE_BEG2 (DEBUG_SYSIO, "_gpgme_io_write", fd,
+ "buffer=%p, count=%u", buffer, count);
+ TRACE_LOGBUF ((char *) buffer, count);
+
+ chan = find_channel (fd, 0);
+ if (!chan)
+ {
+ TRACE_LOG ("fd %d: no channel registered");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ( iodevice_table[fd] && !iodevice_table[fd]->blocking && chan->writeWouldBlock() )
+ {
+ errno = EAGAIN;
+ return TRACE_SYSRES( -1 );
+ }
+ nwritten = chan->write ((char *) buffer, count);
+
+ if (nwritten < 0)
+ {
+ nwritten = -1;
+ errno = EIO;
+ return TRACE_SYSRES(-1);
+ }
+ errno = 0;
+ return TRACE_SYSRES (nwritten);
+}
+
+
+int
+_gpgme_io_pipe (int filedes[2], int inherit_idx)
+{
+ KDPipeIODevice *chan;
+ TRACE_BEG2 (DEBUG_SYSIO, "_gpgme_io_pipe", filedes,
+ "inherit_idx=%i (GPGME uses it for %s)",
+ inherit_idx, inherit_idx ? "reading" : "writing");
+
+#define PIPEBUF_SIZE 4096
+ if (_pipe (filedes, PIPEBUF_SIZE, O_NOINHERIT | O_BINARY) == -1)
+ return TRACE_SYSRES (-1);
+
+ /* Make one end inheritable. */
+ if (inherit_idx == 0)
+ {
+ int new_read;
+
+ new_read = _dup (filedes[0]);
+ _close (filedes[0]);
+ filedes[0] = new_read;
+
+ if (new_read < 0)
+ {
+ _close (filedes[1]);
+ return TRACE_SYSRES (-1);
+ }
+ }
+ else if (inherit_idx == 1)
+ {
+ int new_write;
+
+ new_write = _dup (filedes[1]);
+ _close (filedes[1]);
+ filedes[1] = new_write;
+
+ if (new_write < 0)
+ {
+ _close (filedes[0]);
+ return TRACE_SYSRES (-1);
+ }
+ }
+
+ /* Now we have a pipe with the right end inheritable. The other end
+ should have a giochannel. */
+
+ chan = find_channel (filedes[1 - inherit_idx], 1);
+
+ if (!chan)
+ {
+ int saved_errno = errno;
+ _close (filedes[0]);
+ _close (filedes[1]);
+ errno = saved_errno;
+ return TRACE_SYSRES (-1);
+ }
+
+ return TRACE_SUC5 ("read=0x%x/%p, write=0x%x/%p, channel=%p",
+ filedes[0], (HANDLE) _get_osfhandle (filedes[0]),
+ filedes[1], (HANDLE) _get_osfhandle (filedes[1]),
+ chan);
+}
+
+int
+_gpgme_io_close (int fd)
+{
+ KDPipeIODevice *chan;
+ TRACE_BEG (DEBUG_SYSIO, "_gpgme_io_close", fd);
+
+ if (fd < 0 || fd >= MAX_SLAFD)
+ {
+ errno = EBADF;
+ return TRACE_SYSRES (-1);
+ }
+
+ /* First call the notify handler. */
+ if (notify_table[fd].handler)
+ {
+ notify_table[fd].handler (fd, notify_table[fd].value);
+ notify_table[fd].handler = NULL;
+ notify_table[fd].value = NULL;
+ }
+
+ /* Then do the close. */
+
+ DeviceEntry* const entry = iodevice_table[fd];
+ if ( entry ) {
+ if ( entry->unref() == 0 ) {
+ entry->iodev->close();
+ delete entry->iodev;
+ delete entry;
+ iodevice_table[fd] = 0;
+ }
+ } else {
+ _close( fd );
+ }
+
+
+
+ return 0;
+}
+
+
+int
+_gpgme_io_set_close_notify (int fd, _gpgme_close_notify_handler_t handler,
+ void *value)
+{
+ TRACE_BEG2 (DEBUG_SYSIO, "_gpgme_io_set_close_notify", fd,
+ "close_handler=%p/%p", handler, value);
+
+ assert (fd != -1);
+
+ if (fd < 0 || fd >= (int) DIM (notify_table))
+ {
+ errno = EINVAL;
+ return TRACE_SYSRES (-1);
+ }
+ notify_table[fd].handler = handler;
+ notify_table[fd].value = value;
+ return TRACE_SYSRES (0);
+}
+
+
+int
+_gpgme_io_set_nonblocking (int fd)
+{
+ DeviceEntry* const entry = iodevice_table[fd];
+ assert( entry );
+ entry->blocking = false;
+ TRACE_BEG (DEBUG_SYSIO, "_gpgme_io_set_nonblocking", fd);
+ return TRACE_SYSRES (0);
+}
+
+
+static char *
+build_commandline (char **argv)
+{
+ int i;
+ int n = 0;
+ char *buf;
+ char *p;
+
+ /* We have to quote some things because under Windows the program
+ parses the commandline and does some unquoting. We enclose the
+ whole argument in double-quotes, and escape literal double-quotes
+ as well as backslashes with a backslash. We end up with a
+ trailing space at the end of the line, but that is harmless. */
+ for (i = 0; argv[i]; i++)
+ {
+ p = argv[i];
+ /* The leading double-quote. */
+ n++;
+ while (*p)
+ {
+ /* An extra one for each literal that must be escaped. */
+ if (*p == '\\' || *p == '"')
+ n++;
+ n++;
+ p++;
+ }
+ /* The trailing double-quote and the delimiter. */
+ n += 2;
+ }
+ /* And a trailing zero. */
+ n++;
+
+ buf = p = (char *) malloc (n);
+ if (!buf)
+ return NULL;
+ for (i = 0; argv[i]; i++)
+ {
+ char *argvp = argv[i];
+
+ *(p++) = '"';
+ while (*argvp)
+ {
+ if (*argvp == '\\' || *argvp == '"')
+ *(p++) = '\\';
+ *(p++) = *(argvp++);
+ }
+ *(p++) = '"';
+ *(p++) = ' ';
+ }
+ *(p++) = 0;
+
+ return buf;
+}
+
+
+int
+_gpgme_io_spawn (const char *path, char * const argv[], unsigned int flags,
+ struct spawn_fd_item_s *fd_list,
+ void (*atfork) (void *opaque, int reserved),
+ void *atforkvalue, pid_t *r_pid)
+{
+ SECURITY_ATTRIBUTES sec_attr;
+ PROCESS_INFORMATION pi =
+ {
+ NULL, /* returns process handle */
+ 0, /* returns primary thread handle */
+ 0, /* returns pid */
+ 0 /* returns tid */
+ };
+ STARTUPINFO si;
+ int cr_flags = CREATE_DEFAULT_ERROR_MODE
+ | GetPriorityClass (GetCurrentProcess ());
+ int i;
+ char **args;
+ char *arg_string;
+ /* FIXME. */
+ int debug_me = 0;
+ int tmp_fd;
+ char *tmp_name;
+
+ TRACE_BEG1 (DEBUG_SYSIO, "_gpgme_io_spawn", path,
+ "path=%s", path);
+ i = 0;
+ while (argv[i])
+ {
+ TRACE_LOG2 ("argv[%2i] = %s", i, argv[i]);
+ i++;
+ }
+
+ /* We do not inherit any handles by default, and just insert those
+ handles we want the child to have afterwards. But some handle
+ values occur on the command line, and we need to move
+ stdin/out/err to the right location. So we use a wrapper program
+ which gets the information from a temporary file. */
+ if (_gpgme_mkstemp (&tmp_fd, &tmp_name) < 0)
+ {
+ TRACE_LOG1 ("_gpgme_mkstemp failed: %s", strerror (errno));
+ return TRACE_SYSRES (-1);
+ }
+ TRACE_LOG1 ("tmp_name = %s", tmp_name);
+
+ args = (char **) calloc (2 + i + 1, sizeof (*args));
+ args[0] = (char *) _gpgme_get_w32spawn_path ();
+ args[1] = tmp_name;
+ args[2] = const_cast<char *>(path);
+ memcpy (&args[3], &argv[1], i * sizeof (*args));
+
+ memset (&sec_attr, 0, sizeof sec_attr);
+ sec_attr.nLength = sizeof sec_attr;
+ sec_attr.bInheritHandle = FALSE;
+
+ arg_string = build_commandline (args);
+ free (args);
+ if (!arg_string)
+ {
+ close (tmp_fd);
+ DeleteFile (tmp_name);
+ return TRACE_SYSRES (-1);
+ }
+
+ memset (&si, 0, sizeof si);
+ si.cb = sizeof (si);
+ si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+ si.wShowWindow = debug_me ? SW_SHOW : SW_HIDE;
+ si.hStdInput = INVALID_HANDLE_VALUE;
+ si.hStdOutput = INVALID_HANDLE_VALUE;
+ si.hStdError = INVALID_HANDLE_VALUE;
+
+ cr_flags |= CREATE_SUSPENDED;
+ cr_flags |= DETACHED_PROCESS;
+ if (!CreateProcessA (_gpgme_get_w32spawn_path (),
+ arg_string,
+ &sec_attr, /* process security attributes */
+ &sec_attr, /* thread security attributes */
+ FALSE, /* inherit handles */
+ cr_flags, /* creation flags */
+ NULL, /* environment */
+ NULL, /* use current drive/directory */
+ &si, /* startup information */
+ &pi)) /* returns process information */
+ {
+ TRACE_LOG1 ("CreateProcess failed: ec=%d", (int) GetLastError ());
+ free (arg_string);
+ close (tmp_fd);
+ DeleteFile (tmp_name);
+
+ /* FIXME: Should translate the error code. */
+ errno = EIO;
+ return TRACE_SYSRES (-1);
+ }
+
+ free (arg_string);
+
+ if (flags & IOSPAWN_FLAG_ALLOW_SET_FG)
+ _gpgme_allow_set_foreground_window ((pid_t)pi.dwProcessId);
+
+ /* Insert the inherited handles. */
+ for (i = 0; fd_list[i].fd != -1; i++)
+ {
+ HANDLE hd;
+
+ if (!DuplicateHandle (GetCurrentProcess(),
+ (HANDLE) _get_osfhandle (fd_list[i].fd),
+ pi.hProcess, &hd, 0, TRUE, DUPLICATE_SAME_ACCESS))
+ {
+ TRACE_LOG1 ("DuplicateHandle failed: ec=%d", (int) GetLastError ());
+ TerminateProcess (pi.hProcess, 0);
+ /* Just in case TerminateProcess didn't work, let the
+ process fail on its own. */
+ ResumeThread (pi.hThread);
+ CloseHandle (pi.hThread);
+ CloseHandle (pi.hProcess);
+
+ close (tmp_fd);
+ DeleteFile (tmp_name);
+
+ /* FIXME: Should translate the error code. */
+ errno = EIO;
+ return TRACE_SYSRES (-1);
+ }
+ /* Return the child name of this handle. */
+ fd_list[i].peer_name = (int) hd;
+ }
+
+ /* Write the handle translation information to the temporary
+ file. */
+ {
+ /* Hold roughly MAX_TRANS quadruplets of 64 bit numbers in hex
+ notation: "0xFEDCBA9876543210" with an extra white space after
+ every quadruplet. 10*(19*4 + 1) - 1 = 769. This plans ahead
+ for a time when a HANDLE is 64 bit. */
+#define BUFFER_MAX 800
+ char line[BUFFER_MAX + 1];
+ int res;
+ int written;
+ size_t len;
+
+ if ((flags & IOSPAWN_FLAG_ALLOW_SET_FG))
+ strcpy (line, "~1 \n");
+ else
+ strcpy (line, "\n");
+ for (i = 0; fd_list[i].fd != -1; i++)
+ {
+ /* Strip the newline. */
+ len = strlen (line) - 1;
+
+ /* Format is: Local name, stdin/stdout/stderr, peer name, argv idx. */
+ snprintf (&line[len], BUFFER_MAX - len, "0x%x %d 0x%x %d \n",
+ fd_list[i].fd, fd_list[i].dup_to,
+ fd_list[i].peer_name, fd_list[i].arg_loc);
+ /* Rather safe than sorry. */
+ line[BUFFER_MAX - 1] = '\n';
+ line[BUFFER_MAX] = '\0';
+ }
+ len = strlen (line);
+ written = 0;
+ do
+ {
+ res = write (tmp_fd, &line[written], len - written);
+ if (res > 0)
+ written += res;
+ }
+ while (res > 0 || (res < 0 && errno == EAGAIN));
+ }
+ close (tmp_fd);
+ /* The temporary file is deleted by the gpgme-w32spawn process
+ (hopefully). */
+
+ TRACE_LOG4 ("CreateProcess ready: hProcess=%p, hThread=%p, "
+ "dwProcessID=%d, dwThreadId=%d",
+ pi.hProcess, pi.hThread,
+ (int) pi.dwProcessId, (int) pi.dwThreadId);
+
+ if (r_pid)
+ *r_pid = (pid_t)pi.dwProcessId;
+
+ if (ResumeThread (pi.hThread) < 0)
+ TRACE_LOG1 ("ResumeThread failed: ec=%d", (int) GetLastError ());
+
+ if (!CloseHandle (pi.hThread))
+ TRACE_LOG1 ("CloseHandle of thread failed: ec=%d",
+ (int) GetLastError ());
+
+ TRACE_LOG1 ("process=%p", pi.hProcess);
+
+ /* We don't need to wait for the process. */
+ if (!CloseHandle (pi.hProcess))
+ TRACE_LOG1 ("CloseHandle of process failed: ec=%d",
+ (int) GetLastError ());
+
+ for (i = 0; fd_list[i].fd != -1; i++)
+ _gpgme_io_close (fd_list[i].fd);
+
+ for (i = 0; fd_list[i].fd != -1; i++)
+ if (fd_list[i].dup_to == -1)
+ TRACE_LOG3 ("fd[%i] = 0x%x -> 0x%x", i, fd_list[i].fd,
+ fd_list[i].peer_name);
+ else
+ TRACE_LOG4 ("fd[%i] = 0x%x -> 0x%x (std%s)", i, fd_list[i].fd,
+ fd_list[i].peer_name, (fd_list[i].dup_to == 0) ? "in" :
+ ((fd_list[i].dup_to == 1) ? "out" : "err"));
+
+ return TRACE_SYSRES (0);
+}
+
+
+/* Select on the list of fds. Returns: -1 = error, 0 = timeout or
+ nothing to select, > 0 = number of signaled fds. */
+int
+_gpgme_io_select (struct io_select_fd_s *fds, size_t nfds, int nonblock)
+{
+ /* Use a 1s timeout. */
+
+ void *dbg_help = NULL;
+ TRACE_BEG2 (DEBUG_SYSIO, "_gpgme_io_select", fds,
+ "nfds=%u, nonblock=%u", nfds, nonblock);
+
+ int count = 0;
+
+ TRACE_SEQ (dbg_help, "select on [ ");
+ for (int i = 0; i < nfds; i++)
+ {
+ if (fds[i].fd == -1)
+ {
+ fds[i].signaled = 0;
+ }
+ else if (fds[i].for_read )
+ {
+ KDPipeIODevice * const chan = find_channel (fds[i].fd, 0);
+ assert (chan);
+ if ( nonblock )
+ fds[i].signaled = chan->readWouldBlock() ? 0 : 1;
+ else
+ fds[i].signaled = chan->waitForReadyRead( 1000 ) ? 1 : 0;
+ TRACE_ADD1 (dbg_help, "w0x%x ", fds[i].fd);
+ if ( fds[i].signaled )
+ count++;
+ }
+ else if (fds[i].for_write)
+ {
+ const KDPipeIODevice * const chan = find_channel (fds[i].fd, 0);
+ assert (chan);
+ fds[i].signaled = nonblock ? ( chan->writeWouldBlock() ? 0 : 1 ) : 1;
+ TRACE_ADD1 (dbg_help, "w0x%x ", fds[i].fd);
+ if ( fds[i].signaled )
+ count++;
+ }
+ }
+ TRACE_END (dbg_help, "]");
+
+ return TRACE_SYSRES (count);
+}
+
+
+/* Look up the qiodevice for file descriptor FD. */
+extern "C"
+void *
+gpgme_get_fdptr (int fd)
+{
+ return find_channel (fd, 0);
+}
+
+
+/* Obsolete compatibility interface. */
+extern "C"
+void *
+gpgme_get_giochannel (int fd)
+{
+ return NULL;
+}
+
+
+int
+_gpgme_io_dup (int fd)
+{
+ assert( iodevice_table[fd] );
+ iodevice_table[fd]->ref();
+ return fd;
+}
+
+
+extern "C"
+int
+_gpgme_io_socket (int domain, int type, int proto)
+{
+ errno = EIO;
+ return -1;
+}
+
+
+extern "C"
+int
+_gpgme_io_connect (int fd, struct sockaddr *addr, int addrlen)
+{
+ errno = EIO;
+ return -1;
+}