17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5facf4a8dSllai1 * Common Development and Distribution License (the "License").
6facf4a8dSllai1 * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
21494a4c51Sraf
227c478bd9Sstevel@tonic-gate /*
237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
27*7d8deab2SAndy Fiddaman /*
28*7d8deab2SAndy Fiddaman * Copyright 2020 OmniOS Community Edition (OmniOSce) Association.
29*7d8deab2SAndy Fiddaman */
30*7d8deab2SAndy Fiddaman
317c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
327c478bd9Sstevel@tonic-gate /* All Rights Reserved */
337c478bd9Sstevel@tonic-gate
347257d1b4Sraf #pragma weak _ptsname = ptsname
357257d1b4Sraf #pragma weak _grantpt = grantpt
367257d1b4Sraf #pragma weak _unlockpt = unlockpt
377257d1b4Sraf
387257d1b4Sraf #include "lint.h"
39494a4c51Sraf #include "libc.h"
40494a4c51Sraf #include "mtlib.h"
417c478bd9Sstevel@tonic-gate #include <sys/types.h>
427c478bd9Sstevel@tonic-gate #include <signal.h>
437c478bd9Sstevel@tonic-gate #include <sys/param.h>
447c478bd9Sstevel@tonic-gate #include <sys/mkdev.h>
457c478bd9Sstevel@tonic-gate #include <sys/stream.h>
467c478bd9Sstevel@tonic-gate #include <sys/stropts.h>
477c478bd9Sstevel@tonic-gate #include <sys/wait.h>
487c478bd9Sstevel@tonic-gate #include <sys/signal.h>
497c478bd9Sstevel@tonic-gate #include <errno.h>
507c478bd9Sstevel@tonic-gate #include <fcntl.h>
517c478bd9Sstevel@tonic-gate #include <sys/stat.h>
527c478bd9Sstevel@tonic-gate #include <sys/ptms.h>
537c478bd9Sstevel@tonic-gate #include <string.h>
547c478bd9Sstevel@tonic-gate #include <stdlib.h>
557c478bd9Sstevel@tonic-gate #include <unistd.h>
567c478bd9Sstevel@tonic-gate #include <wait.h>
577c478bd9Sstevel@tonic-gate #include <spawn.h>
58facf4a8dSllai1 #include <grp.h>
597c478bd9Sstevel@tonic-gate #include "tsd.h"
607c478bd9Sstevel@tonic-gate
617c478bd9Sstevel@tonic-gate #define PTSNAME "/dev/pts/" /* slave name */
627c478bd9Sstevel@tonic-gate #define PTLEN 32 /* slave name length */
63facf4a8dSllai1 #define DEFAULT_TTY_GROUP "tty" /* slave device group owner */
647c478bd9Sstevel@tonic-gate
657c478bd9Sstevel@tonic-gate static void itoa(int, char *);
667c478bd9Sstevel@tonic-gate
677c478bd9Sstevel@tonic-gate /*
687c478bd9Sstevel@tonic-gate * Check that fd argument is a file descriptor of an opened master.
697c478bd9Sstevel@tonic-gate * Do this by sending an ISPTM ioctl message down stream. Ioctl()
707c478bd9Sstevel@tonic-gate * will fail if:(1) fd is not a valid file descriptor.(2) the file
717c478bd9Sstevel@tonic-gate * represented by fd does not understand ISPTM(not a master device).
727c478bd9Sstevel@tonic-gate * If we have a valid master, get its minor number via fstat().
737c478bd9Sstevel@tonic-gate * Concatenate it to PTSNAME and return it as the name of the slave
747c478bd9Sstevel@tonic-gate * device.
757c478bd9Sstevel@tonic-gate */
767c478bd9Sstevel@tonic-gate static dev_t
ptsdev(int fd)777c478bd9Sstevel@tonic-gate ptsdev(int fd)
787c478bd9Sstevel@tonic-gate {
797c478bd9Sstevel@tonic-gate struct stat64 status;
807c478bd9Sstevel@tonic-gate struct strioctl istr;
817c478bd9Sstevel@tonic-gate
827c478bd9Sstevel@tonic-gate istr.ic_cmd = ISPTM;
837c478bd9Sstevel@tonic-gate istr.ic_len = 0;
847c478bd9Sstevel@tonic-gate istr.ic_timout = 0;
857c478bd9Sstevel@tonic-gate istr.ic_dp = NULL;
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate if (ioctl(fd, I_STR, &istr) < 0 || fstat64(fd, &status) < 0)
887c478bd9Sstevel@tonic-gate return (NODEV);
897c478bd9Sstevel@tonic-gate
907c478bd9Sstevel@tonic-gate return (minor(status.st_rdev));
917c478bd9Sstevel@tonic-gate }
927c478bd9Sstevel@tonic-gate
937c478bd9Sstevel@tonic-gate char *
ptsname(int fd)947c478bd9Sstevel@tonic-gate ptsname(int fd)
957c478bd9Sstevel@tonic-gate {
967c478bd9Sstevel@tonic-gate dev_t dev;
977c478bd9Sstevel@tonic-gate char *sname;
987c478bd9Sstevel@tonic-gate
997c478bd9Sstevel@tonic-gate if ((dev = ptsdev(fd)) == NODEV)
1007c478bd9Sstevel@tonic-gate return (NULL);
1017c478bd9Sstevel@tonic-gate
1027c478bd9Sstevel@tonic-gate sname = tsdalloc(_T_PTSNAME, PTLEN, NULL);
1037c478bd9Sstevel@tonic-gate if (sname == NULL)
1047c478bd9Sstevel@tonic-gate return (NULL);
1057c478bd9Sstevel@tonic-gate (void) strcpy(sname, PTSNAME);
1067c478bd9Sstevel@tonic-gate itoa(dev, sname + strlen(PTSNAME));
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate /*
109facf4a8dSllai1 * This lookup will create the /dev/pts node (if the corresponding
110facf4a8dSllai1 * pty exists.
1117c478bd9Sstevel@tonic-gate */
112facf4a8dSllai1 if (access(sname, F_OK) == 0)
1137c478bd9Sstevel@tonic-gate return (sname);
114facf4a8dSllai1
1157c478bd9Sstevel@tonic-gate return (NULL);
1167c478bd9Sstevel@tonic-gate }
1177c478bd9Sstevel@tonic-gate
1187c478bd9Sstevel@tonic-gate /*
1197c478bd9Sstevel@tonic-gate * Send an ioctl down to the master device requesting the
1207c478bd9Sstevel@tonic-gate * master/slave pair be unlocked.
1217c478bd9Sstevel@tonic-gate */
1227c478bd9Sstevel@tonic-gate int
unlockpt(int fd)1237c478bd9Sstevel@tonic-gate unlockpt(int fd)
1247c478bd9Sstevel@tonic-gate {
1257c478bd9Sstevel@tonic-gate struct strioctl istr;
1267c478bd9Sstevel@tonic-gate
1277c478bd9Sstevel@tonic-gate istr.ic_cmd = UNLKPT;
1287c478bd9Sstevel@tonic-gate istr.ic_len = 0;
1297c478bd9Sstevel@tonic-gate istr.ic_timout = 0;
1307c478bd9Sstevel@tonic-gate istr.ic_dp = NULL;
1317c478bd9Sstevel@tonic-gate
1327c478bd9Sstevel@tonic-gate if (ioctl(fd, I_STR, &istr) < 0)
1337c478bd9Sstevel@tonic-gate return (-1);
1347c478bd9Sstevel@tonic-gate
1357c478bd9Sstevel@tonic-gate return (0);
1367c478bd9Sstevel@tonic-gate }
1377c478bd9Sstevel@tonic-gate
138*7d8deab2SAndy Fiddaman /*
139*7d8deab2SAndy Fiddaman * XPG4v2 requires that open of a slave pseudo terminal device
140*7d8deab2SAndy Fiddaman * provides the process with an interface that is identical to
141*7d8deab2SAndy Fiddaman * the terminal interface.
142*7d8deab2SAndy Fiddaman *
143*7d8deab2SAndy Fiddaman * To satisfy this, in strict XPG4v2 mode, this routine also sends
144*7d8deab2SAndy Fiddaman * a message down the stream that sets a flag in the kernel module
145*7d8deab2SAndy Fiddaman * so that additional actions are performed when opening an
146*7d8deab2SAndy Fiddaman * associated slave PTY device. When this happens, modules are
147*7d8deab2SAndy Fiddaman * automatically pushed onto the stream to provide terminal
148*7d8deab2SAndy Fiddaman * semantics and those modules are then informed that they should
149*7d8deab2SAndy Fiddaman * behave in strict XPG4v2 mode which modifies their behaviour. In
150*7d8deab2SAndy Fiddaman * particular, in strict XPG4v2 mode, empty blocks will be sent up
151*7d8deab2SAndy Fiddaman * the master side of the stream rather than being suppressed.
152*7d8deab2SAndy Fiddaman *
153*7d8deab2SAndy Fiddaman * Most applications do not expect this behaviour so it is only
154*7d8deab2SAndy Fiddaman * enabled for programs compiled in strict XPG4v2 mode (see
155*7d8deab2SAndy Fiddaman * stdlib.h).
156*7d8deab2SAndy Fiddaman */
157*7d8deab2SAndy Fiddaman int
__unlockpt_xpg4(int fd)158*7d8deab2SAndy Fiddaman __unlockpt_xpg4(int fd)
159*7d8deab2SAndy Fiddaman {
160*7d8deab2SAndy Fiddaman int ret;
161*7d8deab2SAndy Fiddaman
162*7d8deab2SAndy Fiddaman if ((ret = unlockpt(fd)) == 0) {
163*7d8deab2SAndy Fiddaman struct strioctl istr;
164*7d8deab2SAndy Fiddaman
165*7d8deab2SAndy Fiddaman istr.ic_cmd = PTSSTTY;
166*7d8deab2SAndy Fiddaman istr.ic_len = 0;
167*7d8deab2SAndy Fiddaman istr.ic_timout = 0;
168*7d8deab2SAndy Fiddaman istr.ic_dp = NULL;
169*7d8deab2SAndy Fiddaman
170*7d8deab2SAndy Fiddaman if (ioctl(fd, I_STR, &istr) < 0)
171*7d8deab2SAndy Fiddaman ret = -1;
172*7d8deab2SAndy Fiddaman }
173*7d8deab2SAndy Fiddaman
174*7d8deab2SAndy Fiddaman return (ret);
175*7d8deab2SAndy Fiddaman }
176*7d8deab2SAndy Fiddaman
177facf4a8dSllai1 int
grantpt(int fd)178facf4a8dSllai1 grantpt(int fd)
1797c478bd9Sstevel@tonic-gate {
180facf4a8dSllai1 struct strioctl istr;
181facf4a8dSllai1 pt_own_t pto;
182facf4a8dSllai1 struct group *gr_name;
1837c478bd9Sstevel@tonic-gate
1847c478bd9Sstevel@tonic-gate /* validate the file descriptor before proceeding */
185facf4a8dSllai1 if (ptsdev(fd) == NODEV)
1867c478bd9Sstevel@tonic-gate return (-1);
1877c478bd9Sstevel@tonic-gate
188facf4a8dSllai1 pto.pto_ruid = getuid();
1897c478bd9Sstevel@tonic-gate
190facf4a8dSllai1 gr_name = getgrnam(DEFAULT_TTY_GROUP);
191facf4a8dSllai1 if (gr_name)
192facf4a8dSllai1 pto.pto_rgid = gr_name->gr_gid;
193facf4a8dSllai1 else
194facf4a8dSllai1 pto.pto_rgid = getgid();
1957c478bd9Sstevel@tonic-gate
19649e92448Svikram istr.ic_cmd = OWNERPT;
197facf4a8dSllai1 istr.ic_len = sizeof (pt_own_t);
198facf4a8dSllai1 istr.ic_timout = 0;
199facf4a8dSllai1 istr.ic_dp = (char *)&pto;
2007c478bd9Sstevel@tonic-gate
201facf4a8dSllai1 if (ioctl(fd, I_STR, &istr) != 0) {
2027c478bd9Sstevel@tonic-gate errno = EACCES;
2037c478bd9Sstevel@tonic-gate return (-1);
2047c478bd9Sstevel@tonic-gate }
2057c478bd9Sstevel@tonic-gate
206facf4a8dSllai1 return (0);
2077c478bd9Sstevel@tonic-gate }
2087c478bd9Sstevel@tonic-gate
2097c478bd9Sstevel@tonic-gate /*
2107c478bd9Sstevel@tonic-gate * Send an ioctl down to the master device requesting the master/slave pair
2117c478bd9Sstevel@tonic-gate * be assigned to the given zone.
2127c478bd9Sstevel@tonic-gate */
2137c478bd9Sstevel@tonic-gate int
zonept(int fd,zoneid_t zoneid)2147c478bd9Sstevel@tonic-gate zonept(int fd, zoneid_t zoneid)
2157c478bd9Sstevel@tonic-gate {
2167c478bd9Sstevel@tonic-gate struct strioctl istr;
2177c478bd9Sstevel@tonic-gate
2187c478bd9Sstevel@tonic-gate istr.ic_cmd = ZONEPT;
2197c478bd9Sstevel@tonic-gate istr.ic_len = sizeof (zoneid);
2207c478bd9Sstevel@tonic-gate istr.ic_timout = 0;
2217c478bd9Sstevel@tonic-gate istr.ic_dp = (char *)&zoneid;
2227c478bd9Sstevel@tonic-gate
2237c478bd9Sstevel@tonic-gate if (ioctl(fd, I_STR, &istr) != 0) {
2247c478bd9Sstevel@tonic-gate return (-1);
2257c478bd9Sstevel@tonic-gate }
2267c478bd9Sstevel@tonic-gate return (0);
2277c478bd9Sstevel@tonic-gate }
2287c478bd9Sstevel@tonic-gate
2297c478bd9Sstevel@tonic-gate
2307c478bd9Sstevel@tonic-gate static void
itoa(int i,char * ptr)2317c478bd9Sstevel@tonic-gate itoa(int i, char *ptr)
2327c478bd9Sstevel@tonic-gate {
2337c478bd9Sstevel@tonic-gate int dig = 0;
2347c478bd9Sstevel@tonic-gate int tempi;
2357c478bd9Sstevel@tonic-gate
2367c478bd9Sstevel@tonic-gate tempi = i;
2377c478bd9Sstevel@tonic-gate do {
2387c478bd9Sstevel@tonic-gate dig++;
2397c478bd9Sstevel@tonic-gate tempi /= 10;
2407c478bd9Sstevel@tonic-gate } while (tempi);
2417c478bd9Sstevel@tonic-gate
2427c478bd9Sstevel@tonic-gate ptr += dig;
2437c478bd9Sstevel@tonic-gate *ptr = '\0';
2447c478bd9Sstevel@tonic-gate while (--dig >= 0) {
2457c478bd9Sstevel@tonic-gate *(--ptr) = i % 10 + '0';
2467c478bd9Sstevel@tonic-gate i /= 10;
2477c478bd9Sstevel@tonic-gate }
2487c478bd9Sstevel@tonic-gate }
2497c478bd9Sstevel@tonic-gate
2507c478bd9Sstevel@tonic-gate
2517c478bd9Sstevel@tonic-gate /*
2527c478bd9Sstevel@tonic-gate * added for SUSv3 standard
2537c478bd9Sstevel@tonic-gate *
2547c478bd9Sstevel@tonic-gate * Open a pseudo-terminal device. External interface.
2557c478bd9Sstevel@tonic-gate */
2567c478bd9Sstevel@tonic-gate
2577c478bd9Sstevel@tonic-gate int
posix_openpt(int oflag)2587c478bd9Sstevel@tonic-gate posix_openpt(int oflag)
2597c478bd9Sstevel@tonic-gate {
2607c478bd9Sstevel@tonic-gate return (open("/dev/ptmx", oflag));
2617c478bd9Sstevel@tonic-gate }
262