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-rw-r--r--util/qemu-openpty.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/util/qemu-openpty.c b/util/qemu-openpty.c
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+/*
+ * qemu-openpty.c
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2010 Red Hat, Inc.
+ *
+ * Wrapper function qemu_openpty() implementation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/*
+ * This is not part of oslib-posix.c because this function
+ * uses openpty() which often in -lutil, and if we add this
+ * dependency to oslib-posix.o, every app will have to be
+ * linked with -lutil.
+ */
+
+#include "config-host.h"
+#include "qemu-common.h"
+
+#if defined(__GLIBC__)
+# include <pty.h>
+#elif defined CONFIG_BSD
+# include <termios.h>
+# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+# include <libutil.h>
+# else
+# include <util.h>
+# endif
+#elif defined CONFIG_SOLARIS
+# include <termios.h>
+# include <stropts.h>
+#endif
+
+#ifdef __sun__
+/* Once Solaris has openpty(), this is going to be removed. */
+static int openpty(int *amaster, int *aslave, char *name,
+ struct termios *termp, struct winsize *winp)
+{
+ const char *slave;
+ int mfd = -1, sfd = -1;
+
+ *amaster = *aslave = -1;
+
+ mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
+ if (mfd < 0)
+ goto err;
+
+ if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
+ goto err;
+
+ if ((slave = ptsname(mfd)) == NULL)
+ goto err;
+
+ if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
+ goto err;
+
+ if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
+ (termp != NULL && tcgetattr(sfd, termp) < 0))
+ goto err;
+
+ if (amaster)
+ *amaster = mfd;
+ if (aslave)
+ *aslave = sfd;
+ if (winp)
+ ioctl(sfd, TIOCSWINSZ, winp);
+
+ return 0;
+
+err:
+ if (sfd != -1)
+ close(sfd);
+ close(mfd);
+ return -1;
+}
+
+static void cfmakeraw (struct termios *termios_p)
+{
+ termios_p->c_iflag &=
+ ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+ termios_p->c_oflag &= ~OPOST;
+ termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+ termios_p->c_cflag &= ~(CSIZE|PARENB);
+ termios_p->c_cflag |= CS8;
+
+ termios_p->c_cc[VMIN] = 0;
+ termios_p->c_cc[VTIME] = 0;
+}
+#endif
+
+int qemu_openpty_raw(int *aslave, char *pty_name)
+{
+ int amaster;
+ struct termios tty;
+#if defined(__OpenBSD__) || defined(__DragonFly__)
+ char pty_buf[PATH_MAX];
+#define q_ptsname(x) pty_buf
+#else
+ char *pty_buf = NULL;
+#define q_ptsname(x) ptsname(x)
+#endif
+
+ if (openpty(&amaster, aslave, pty_buf, NULL, NULL) < 0) {
+ return -1;
+ }
+
+ /* Set raw attributes on the pty. */
+ tcgetattr(*aslave, &tty);
+ cfmakeraw(&tty);
+ tcsetattr(*aslave, TCSAFLUSH, &tty);
+
+ if (pty_name) {
+ strcpy(pty_name, q_ptsname(amaster));
+ }
+
+ return amaster;
+}