projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 224c7076 A |
1 | /* |
| 2 | * Copyright (c) 2005 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 12 | * | |
| 13 | * The Original Code and all software distributed under the License are | |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 20 | * | |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | ||
| 24 | #include <stdlib.h> | |
| 25 | #include <sys/ioctl.h> | |
| 26 | #include <sys/stat.h> | |
| 27 | #include <fcntl.h> | |
| 28 | #include <errno.h> | |
| 29 | ||
| 30 | /* | |
| 31 | * posix_openpt call for cloning pty implementation. | |
| 32 | * | |
| 33 | * Just open /dev/ptmx | |
| 34 | */ | |
| 35 | int | |
| 36 | posix_openpt(int flags) | |
| 37 | { | |
| 38 | int fd = open("/dev/ptmx", flags); | |
| 39 | if (fd >= 0) | |
| 40 | return fd; | |
| 41 | return -1; | |
| 42 | } | |
| 43 | ||
| 44 | /* | |
| 45 | * grantpt call for cloning pty implementation. | |
| 46 | * | |
| 47 | * Change UID and GID of slave pty associated with master pty whose | |
| 48 | * fd is provided, to the real UID and real GID of the calling thread. | |
| 49 | */ | |
| 50 | int | |
| 51 | grantpt(int fd) | |
| 52 | { | |
| 53 | return ioctl(fd, TIOCPTYGRANT); | |
| 54 | } | |
| 55 | ||
| 56 | /* | |
| 57 | * ptsname call for cloning pty implementation. | |
| 58 | * | |
| 59 | * NOTE: Returns a pointer to a static buffer, which will be overwritten on | |
| 60 | * subsequent calls. | |
| 61 | */ | |
| 62 | char * | |
| 63 | ptsname(int fd) | |
| 64 | { | |
| 65 | static char ptsnamebuf[ 128]; /* ioctl knows length */ | |
| 66 | int error; | |
| 67 | char *retval = NULL; | |
| 68 | struct stat sbuf; | |
| 69 | ||
| 70 | error = ioctl(fd, TIOCPTYGNAME, ptsnamebuf); | |
| 71 | if (!error) { | |
| 72 | /* | |
| 73 | * XXX TSD | |
| 74 | * | |
| 75 | * POSIX: Handle device rename test case, which is expected | |
| 76 | * to fail if the pty has been renamed. | |
| 77 | */ | |
| 78 | if (stat(ptsnamebuf, &sbuf) == 0) | |
| 79 | retval = ptsnamebuf; | |
| 80 | } | |
| 81 | ||
| 82 | return (retval); | |
| 83 | } | |
| 84 | ||
| 85 | /* | |
| 86 | * unlockpt call for cloning pty implementation. | |
| 87 | * | |
| 88 | * Unlock the slave pty associated with the master to which fd refers. | |
| 89 | */ | |
| 90 | int | |
| 91 | unlockpt(int fd) | |
| 92 | { | |
| 93 | return ioctl(fd, TIOCPTYUNLK); | |
| 94 | } |