Annotation of libaitio/src/pty.c, revision 1.1.2.2
1.1.2.1 misho 1: /*************************************************************************
2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.1.2.2 ! misho 6: * $Id: pty.c,v 1.1.2.1 2011/09/19 21:59:58 misho Exp $
1.1.2.1 misho 7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
48:
49: /*
50: * ioAllocPTY() Allocate new PTY
51: * @ptyfd = master fd, pty
52: * @ttyfd = slave fd, tty
53: * @name = tty device name if not null
54: * @namesiz = name length, must be above 63 bytes.
55: * @term = termios for terminal
56: * @winz = winsize for terminal
57: * return: -1 error or 0 ok
58: */
59: inline int
60: ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
61: struct termios * __restrict term, struct winsize * __restrict winz)
62: {
63: assert(ptyfd && ttyfd);
64: if (!ptyfd || !ttyfd || (name && namesiz < 64)) {
65: io_SetErr(EINVAL, "Error:: invalid arguments ...");
66: return -1;
67: }
68:
69: memset(name, 0, namesiz);
70: if (openpty(ptyfd, ttyfd, name, term, winz) == -1) {
71: LOGERR;
72: return -1;
73: }
74:
75: return 0;
76: }
77:
78: /*
79: * ioFreePTY() Release PTY
80: * @ttyname = tty filename
81: * return: none
82: */
83: inline void
84: ioFreePTY(const char *ttyname)
85: {
86: assert(ttyname);
87: if (!ttyname)
88: return;
89:
90: chown(ttyname, (uid_t) 0, (gid_t) 0);
91: chmod(ttyname, (mode_t) 0666);
92: }
1.1.2.2 ! misho 93:
! 94: /*
! 95: * ioChgWinPTY() Change window size of PTY
! 96: * @ptyfd = master fd, pty
! 97: * @row = row
! 98: * @col = col
! 99: * @xpxl = x pixels
! 100: * @ypxl = y pixels
! 101: * return: -1 error or 0 ok
! 102: */
! 103: inline int
! 104: ioChgWinPTY(int ptyfd, u_short row, u_short col, u_short xpxl, u_short ypxl)
! 105: {
! 106: struct winsize w;
! 107:
! 108: w.ws_row = row;
! 109: w.ws_col = col;
! 110: w.ws_xpixel = xpxl;
! 111: w.ws_ypixel = ypxl;
! 112:
! 113: if (ioctl(ptyfd, TIOCSWINSZ, &w) == -1) {
! 114: LOGERR;
! 115: return -1;
! 116: }
! 117:
! 118: return 0;
! 119: }
! 120:
! 121: /*
! 122: * ioSetOwnerPTY() Set owner to PTY
! 123: * @ttyname = tty filename
! 124: * @UID = uid
! 125: * @GID = gid
! 126: * return: -1 error or 0 ok
! 127: */
! 128: int
! 129: ioSetOwnerPTY(const char *ttyname, uid_t UID, gid_t GID)
! 130: {
! 131: struct group *grp;
! 132: gid_t gid;
! 133: mode_t mode;
! 134: struct stat st;
! 135:
! 136: assert(ttyname);
! 137: if (!ttyname) {
! 138: io_SetErr(EINVAL, "Error:: invalid arguments ...");
! 139: return -1;
! 140: }
! 141:
! 142: grp = getgrnam("tty");
! 143: if (!grp) {
! 144: gid = GID;
! 145: mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
! 146: } else {
! 147: gid = grp->gr_gid;
! 148: mode = S_IRUSR | S_IWUSR | S_IWGRP;
! 149: }
! 150:
! 151: if (stat(ttyname, &st) == -1) {
! 152: LOGERR;
! 153: return -1;
! 154: }
! 155:
! 156: if (st.st_uid != UID || st.st_gid != gid)
! 157: if (chown(ttyname, UID, gid) == -1) {
! 158: LOGERR;
! 159: return -1;
! 160: }
! 161: if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode)
! 162: if (chmod(ttyname, mode) == -1) {
! 163: LOGERR;
! 164: return -1;
! 165: }
! 166:
! 167: return 0;
! 168: }
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