diff options
Diffstat (limited to 'util/qemu-openpty.c')
| -rw-r--r-- | util/qemu-openpty.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/util/qemu-openpty.c b/util/qemu-openpty.c new file mode 100644 index 0000000000..4febfe9d72 --- /dev/null +++ b/util/qemu-openpty.c @@ -0,0 +1,135 @@ +/* + * 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; +} |