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Diffstat (limited to 'libtdenetwork/libgpgme-copy/gpgme/posix-io.c')
-rw-r--r--libtdenetwork/libgpgme-copy/gpgme/posix-io.c497
1 files changed, 497 insertions, 0 deletions
diff --git a/libtdenetwork/libgpgme-copy/gpgme/posix-io.c b/libtdenetwork/libgpgme-copy/gpgme/posix-io.c
new file mode 100644
index 000000000..7f3b80e70
--- /dev/null
+++ b/libtdenetwork/libgpgme-copy/gpgme/posix-io.c
@@ -0,0 +1,497 @@
+/* posix-io.c - Posix I/O functions
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, 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 <signal.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "util.h"
+#include "priv-io.h"
+#include "sema.h"
+#include "ath.h"
+#include "debug.h"
+
+
+void
+_gpgme_io_subsystem_init (void)
+{
+ struct sigaction act;
+
+ sigaction (SIGPIPE, NULL, &act);
+ if (act.sa_handler == SIG_DFL)
+ {
+ act.sa_handler = SIG_IGN;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction (SIGPIPE, &act, NULL);
+ }
+}
+
+
+/* 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", fd);
+}
+
+
+static struct
+{
+ void (*handler) (int,void*);
+ void *value;
+} notify_table[256];
+
+int
+_gpgme_io_read (int fd, void *buffer, size_t count)
+{
+ int nread;
+ int saved_errno;
+
+ DEBUG2 ("fd %d: about to read %d bytes\n", fd, (int) count);
+ do
+ {
+ nread = _gpgme_ath_read (fd, buffer, count);
+ }
+ while (nread == -1 && errno == EINTR);
+ saved_errno = errno;
+ DEBUG2 ("fd %d: got %d bytes\n", fd, nread);
+ if (nread > 0)
+ _gpgme_debug (2, "fd %d: got `%.*s'\n", fd, nread, buffer);
+ errno = saved_errno;
+ return nread;
+}
+
+
+int
+_gpgme_io_write (int fd, const void *buffer, size_t count)
+{
+ int saved_errno;
+ int nwritten;
+
+ DEBUG2 ("fd %d: about to write %d bytes\n", fd, (int) count);
+ _gpgme_debug (2, "fd %d: write `%.*s'\n", fd, (int) count, buffer);
+ do
+ {
+ nwritten = _gpgme_ath_write (fd, buffer, count);
+ }
+ while (nwritten == -1 && errno == EINTR);
+ saved_errno = errno;
+ DEBUG2 ("fd %d: wrote %d bytes\n", fd, (int) nwritten);
+ errno = saved_errno;
+ return nwritten;
+}
+
+
+int
+_gpgme_io_pipe (int filedes[2], int inherit_idx)
+{
+ int saved_errno;
+ int err;
+
+ err = pipe (filedes);
+ if (err < 0)
+ return err;
+ /* FIXME: Should get the old flags first. */
+ err = fcntl (filedes[1 - inherit_idx], F_SETFD, FD_CLOEXEC);
+ saved_errno = errno;
+ if (err < 0)
+ {
+ close (filedes[0]);
+ close (filedes[1]);
+ }
+ errno = saved_errno;
+ return err;
+}
+
+
+int
+_gpgme_io_close (int fd)
+{
+ if (fd == -1)
+ return -1;
+ /* First call the notify handler. */
+ DEBUG1 ("closing fd %d", fd);
+ if (fd >= 0 && fd < (int) DIM (notify_table))
+ {
+ 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. */
+ return close (fd);
+}
+
+
+int
+_gpgme_io_set_close_notify (int fd, void (*handler)(int, void*), void *value)
+{
+ assert (fd != -1);
+
+ if (fd < 0 || fd >= (int) DIM (notify_table))
+ return -1;
+ DEBUG1 ("set notification for fd %d", fd);
+ notify_table[fd].handler = handler;
+ notify_table[fd].value = value;
+ return 0;
+}
+
+
+int
+_gpgme_io_set_nonblocking (int fd)
+{
+ int flags;
+
+ flags = fcntl (fd, F_GETFL, 0);
+ if (flags == -1)
+ return -1;
+ flags |= O_NONBLOCK;
+ return fcntl (fd, F_SETFL, flags);
+}
+
+
+static int
+_gpgme_io_waitpid (int pid, int hang, int *r_status, int *r_signal)
+{
+ int status;
+
+ *r_status = 0;
+ *r_signal = 0;
+ if (_gpgme_ath_waitpid (pid, &status, hang? 0 : WNOHANG) == pid)
+ {
+ if (WIFSIGNALED (status))
+ {
+ *r_status = 4; /* Need some value here. */
+ *r_signal = WTERMSIG (status);
+ }
+ else if (WIFEXITED (status))
+ *r_status = WEXITSTATUS (status);
+ else
+ *r_status = 4; /* Oops. */
+ return 1;
+ }
+ return 0;
+}
+
+
+/* Returns 0 on success, -1 on error. */
+int
+_gpgme_io_spawn (const char *path, char **argv,
+ struct spawn_fd_item_s *fd_child_list,
+ struct spawn_fd_item_s *fd_parent_list)
+{
+ pid_t pid;
+ int i;
+ int status, signo;
+
+ pid = fork ();
+ if (pid == -1)
+ return -1;
+
+ if (!pid)
+ {
+ /* Intermediate child to prevent zombie processes. */
+ if ((pid = fork ()) == 0)
+ {
+ /* Child. */
+ int duped_stdin = 0;
+ int duped_stderr = 0;
+
+ /* First close all fds which will not be duped. */
+ for (i=0; fd_child_list[i].fd != -1; i++)
+ if (fd_child_list[i].dup_to == -1)
+ close (fd_child_list[i].fd);
+
+ /* And now dup and close the rest. */
+ for (i=0; fd_child_list[i].fd != -1; i++)
+ {
+ if (fd_child_list[i].dup_to != -1)
+ {
+ if (dup2 (fd_child_list[i].fd,
+ fd_child_list[i].dup_to) == -1)
+ {
+ DEBUG1 ("dup2 failed in child: %s\n", strerror (errno));
+ _exit (8);
+ }
+ if (fd_child_list[i].dup_to == 0)
+ duped_stdin=1;
+ if (fd_child_list[i].dup_to == 2)
+ duped_stderr=1;
+ close (fd_child_list[i].fd);
+ }
+ }
+
+ if (!duped_stdin || !duped_stderr)
+ {
+ int fd = open ("/dev/null", O_RDWR);
+ if (fd == -1)
+ {
+ DEBUG1 ("can't open `/dev/null': %s\n", strerror (errno));
+ _exit (8);
+ }
+ /* Make sure that the process has a connected stdin. */
+ if (!duped_stdin)
+ {
+ if (dup2 (fd, 0) == -1)
+ {
+ DEBUG1("dup2(/dev/null, 0) failed: %s\n",
+ strerror (errno));
+ _exit (8);
+ }
+ }
+ if (!duped_stderr)
+ if (dup2 (fd, 2) == -1)
+ {
+ DEBUG1 ("dup2(dev/null, 2) failed: %s\n",
+ strerror (errno));
+ _exit (8);
+ }
+ close (fd);
+ }
+
+ execv ( path, argv );
+ /* Hmm: in that case we could write a special status code to the
+ status-pipe. */
+ DEBUG1 ("exec of `%s' failed\n", path);
+ _exit (8);
+ } /* End child. */
+ if (pid == -1)
+ _exit (1);
+ else
+ _exit (0);
+ }
+
+ _gpgme_io_waitpid (pid, 1, &status, &signo);
+ if (status)
+ return -1;
+
+ /* .dup_to is not used in the parent list. */
+ for (i = 0; fd_parent_list[i].fd != -1; i++)
+ _gpgme_io_close (fd_parent_list[i].fd);
+
+ return 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)
+{
+ fd_set readfds;
+ fd_set writefds;
+ unsigned int i;
+ int any, max_fd, n, count;
+ struct timeval timeout = { 1, 0 }; /* Use a 1s timeout. */
+ void *dbg_help = NULL;
+
+ FD_ZERO (&readfds);
+ FD_ZERO (&writefds);
+ max_fd = 0;
+ if (nonblock)
+ timeout.tv_sec = 0;
+
+ DEBUG_BEGIN (dbg_help, 3, "gpgme:select on [ ");
+ any = 0;
+ for (i = 0; i < nfds; i++)
+ {
+ if (fds[i].fd == -1)
+ continue;
+ if (fds[i].frozen)
+ DEBUG_ADD1 (dbg_help, "f%d ", fds[i].fd);
+ else if (fds[i].for_read)
+ {
+ assert (!FD_ISSET (fds[i].fd, &readfds));
+ FD_SET (fds[i].fd, &readfds);
+ if (fds[i].fd > max_fd)
+ max_fd = fds[i].fd;
+ DEBUG_ADD1 (dbg_help, "r%d ", fds[i].fd);
+ any = 1;
+ }
+ else if (fds[i].for_write)
+ {
+ assert (!FD_ISSET (fds[i].fd, &writefds));
+ FD_SET (fds[i].fd, &writefds);
+ if (fds[i].fd > max_fd)
+ max_fd = fds[i].fd;
+ DEBUG_ADD1 (dbg_help, "w%d ", fds[i].fd);
+ any = 1;
+ }
+ fds[i].signaled = 0;
+ }
+ DEBUG_END (dbg_help, "]");
+ if (!any)
+ return 0;
+
+ do
+ {
+ count = _gpgme_ath_select (max_fd + 1, &readfds, &writefds, NULL,
+ &timeout);
+ }
+ while (count < 0 && errno == EINTR);
+ if (count < 0)
+ {
+ int saved_errno = errno;
+ DEBUG1 ("_gpgme_io_select failed: %s\n", strerror (errno));
+ errno = saved_errno;
+ return -1; /* error */
+ }
+
+ DEBUG_BEGIN (dbg_help, 3, "select OK [ ");
+ if (DEBUG_ENABLED (dbg_help))
+ {
+ for (i = 0; i <= max_fd; i++)
+ {
+ if (FD_ISSET (i, &readfds))
+ DEBUG_ADD1 (dbg_help, "r%d ", i);
+ if (FD_ISSET (i, &writefds))
+ DEBUG_ADD1 (dbg_help, "w%d ", i);
+ }
+ DEBUG_END (dbg_help, "]");
+ }
+
+ /* n is used to optimize it a little bit. */
+ for (n = count, i = 0; i < nfds && n; i++)
+ {
+ if (fds[i].fd == -1)
+ ;
+ else if (fds[i].for_read)
+ {
+ if (FD_ISSET (fds[i].fd, &readfds))
+ {
+ fds[i].signaled = 1;
+ n--;
+ }
+ }
+ else if (fds[i].for_write)
+ {
+ if (FD_ISSET (fds[i].fd, &writefds))
+ {
+ fds[i].signaled = 1;
+ n--;
+ }
+ }
+ }
+ return count;
+}
+
+
+int
+_gpgme_io_recvmsg (int fd, struct msghdr *msg, int flags)
+{
+ int nread;
+ int saved_errno;
+ struct iovec *iov;
+
+ nread = 0;
+ iov = msg->msg_iov;
+ while (iov < msg->msg_iov + msg->msg_iovlen)
+ {
+ nread += iov->iov_len;
+ iov++;
+ }
+
+ DEBUG2 ("fd %d: about to receive %d bytes\n",
+ fd, (int) nread);
+ do
+ {
+ nread = _gpgme_ath_recvmsg (fd, msg, flags);
+ }
+ while (nread == -1 && errno == EINTR);
+ saved_errno = errno;
+ DEBUG2 ("fd %d: got %d bytes\n", fd, nread);
+ if (nread > 0)
+ {
+ int nr = nread;
+
+ iov = msg->msg_iov;
+ while (nr > 0)
+ {
+ int len = nr > iov->iov_len ? iov->iov_len : nr;
+ _gpgme_debug (2, "fd %d: got `%.*s'\n", fd, len,
+ msg->msg_iov->iov_base);
+ iov++;
+ nr -= len;
+ }
+ }
+ errno = saved_errno;
+ return nread;
+}
+
+
+int
+_gpgme_io_sendmsg (int fd, const struct msghdr *msg, int flags)
+{
+ int saved_errno;
+ int nwritten;
+ struct iovec *iov;
+
+ nwritten = 0;
+ iov = msg->msg_iov;
+ while (iov < msg->msg_iov + msg->msg_iovlen)
+ {
+ nwritten += iov->iov_len;
+ iov++;
+ }
+
+ DEBUG2 ("fd %d: about to write %d bytes\n", fd, (int) nwritten);
+ iov = msg->msg_iov;
+ while (nwritten > 0)
+ {
+ int len = nwritten > iov->iov_len ? iov->iov_len : nwritten;
+ _gpgme_debug (2, "fd %d: write `%.*s'\n", fd, len,
+ msg->msg_iov->iov_base);
+ iov++;
+ nwritten -= len;
+ }
+
+ do
+ {
+ nwritten = _gpgme_ath_sendmsg (fd, msg, flags);
+ }
+ while (nwritten == -1 && errno == EINTR);
+ saved_errno = errno;
+ DEBUG2 ("fd %d: wrote %d bytes\n", fd, (int) nwritten);
+ errno = saved_errno;
+ return nwritten;
+}
+
+
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