Michael Tokarev | 4efeabb | 2013-06-05 18:44:54 +0400 | [diff] [blame] | 1 | /* |
| 2 | * qemu-openpty.c |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * Copyright (c) 2010 Red Hat, Inc. |
| 6 | * |
| 7 | * Wrapper function qemu_openpty() implementation. |
| 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 10 | * of this software and associated documentation files (the "Software"), to deal |
| 11 | * in the Software without restriction, including without limitation the rights |
| 12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 13 | * copies of the Software, and to permit persons to whom the Software is |
| 14 | * furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice shall be included in |
| 17 | * all copies or substantial portions of the Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 22 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 25 | * THE SOFTWARE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * This is not part of oslib-posix.c because this function |
| 30 | * uses openpty() which often in -lutil, and if we add this |
| 31 | * dependency to oslib-posix.o, every app will have to be |
| 32 | * linked with -lutil. |
| 33 | */ |
| 34 | |
Peter Maydell | aafd758 | 2016-01-29 17:49:55 +0000 | [diff] [blame] | 35 | #include "qemu/osdep.h" |
Michael Tokarev | 4efeabb | 2013-06-05 18:44:54 +0400 | [diff] [blame] | 36 | #include "qemu-common.h" |
| 37 | |
| 38 | #if defined(__GLIBC__) |
| 39 | # include <pty.h> |
| 40 | #elif defined CONFIG_BSD |
| 41 | # include <termios.h> |
| 42 | # if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
| 43 | # include <libutil.h> |
| 44 | # else |
| 45 | # include <util.h> |
| 46 | # endif |
| 47 | #elif defined CONFIG_SOLARIS |
| 48 | # include <termios.h> |
| 49 | # include <stropts.h> |
Natanael Copa | 6ad3f09 | 2014-04-29 16:17:27 +0200 | [diff] [blame] | 50 | #else |
| 51 | # include <termios.h> |
Michael Tokarev | 4efeabb | 2013-06-05 18:44:54 +0400 | [diff] [blame] | 52 | #endif |
| 53 | |
| 54 | #ifdef __sun__ |
| 55 | /* Once Solaris has openpty(), this is going to be removed. */ |
| 56 | static int openpty(int *amaster, int *aslave, char *name, |
| 57 | struct termios *termp, struct winsize *winp) |
| 58 | { |
| 59 | const char *slave; |
| 60 | int mfd = -1, sfd = -1; |
| 61 | |
| 62 | *amaster = *aslave = -1; |
| 63 | |
| 64 | mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY); |
| 65 | if (mfd < 0) |
| 66 | goto err; |
| 67 | |
| 68 | if (grantpt(mfd) == -1 || unlockpt(mfd) == -1) |
| 69 | goto err; |
| 70 | |
| 71 | if ((slave = ptsname(mfd)) == NULL) |
| 72 | goto err; |
| 73 | |
| 74 | if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1) |
| 75 | goto err; |
| 76 | |
| 77 | if (ioctl(sfd, I_PUSH, "ptem") == -1 || |
| 78 | (termp != NULL && tcgetattr(sfd, termp) < 0)) |
| 79 | goto err; |
| 80 | |
| 81 | if (amaster) |
| 82 | *amaster = mfd; |
| 83 | if (aslave) |
| 84 | *aslave = sfd; |
| 85 | if (winp) |
| 86 | ioctl(sfd, TIOCSWINSZ, winp); |
| 87 | |
| 88 | return 0; |
| 89 | |
| 90 | err: |
| 91 | if (sfd != -1) |
| 92 | close(sfd); |
| 93 | close(mfd); |
| 94 | return -1; |
| 95 | } |
| 96 | |
| 97 | static void cfmakeraw (struct termios *termios_p) |
| 98 | { |
| 99 | termios_p->c_iflag &= |
| 100 | ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
| 101 | termios_p->c_oflag &= ~OPOST; |
| 102 | termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
| 103 | termios_p->c_cflag &= ~(CSIZE|PARENB); |
| 104 | termios_p->c_cflag |= CS8; |
| 105 | |
| 106 | termios_p->c_cc[VMIN] = 0; |
| 107 | termios_p->c_cc[VTIME] = 0; |
| 108 | } |
| 109 | #endif |
| 110 | |
| 111 | int qemu_openpty_raw(int *aslave, char *pty_name) |
| 112 | { |
| 113 | int amaster; |
| 114 | struct termios tty; |
| 115 | #if defined(__OpenBSD__) || defined(__DragonFly__) |
| 116 | char pty_buf[PATH_MAX]; |
| 117 | #define q_ptsname(x) pty_buf |
| 118 | #else |
| 119 | char *pty_buf = NULL; |
| 120 | #define q_ptsname(x) ptsname(x) |
| 121 | #endif |
| 122 | |
| 123 | if (openpty(&amaster, aslave, pty_buf, NULL, NULL) < 0) { |
| 124 | return -1; |
| 125 | } |
| 126 | |
| 127 | /* Set raw attributes on the pty. */ |
| 128 | tcgetattr(*aslave, &tty); |
| 129 | cfmakeraw(&tty); |
| 130 | tcsetattr(*aslave, TCSAFLUSH, &tty); |
| 131 | |
| 132 | if (pty_name) { |
| 133 | strcpy(pty_name, q_ptsname(amaster)); |
| 134 | } |
| 135 | |
| 136 | return amaster; |
| 137 | } |