+/* $OpenBSD: sshpty.c,v 1.28 2007/09/11 23:49:09 stevesk Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: sshpty.c,v 1.3 2001/07/22 21:32:27 markus Exp $");
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <signal.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#include <pwd.h>
+#include <stdarg.h>
+#include <string.h>
+#include <termios.h>
#ifdef HAVE_UTIL_H
# include <util.h>
-#endif /* HAVE_UTIL_H */
+#endif
+#include <unistd.h>
#include "sshpty.h"
#include "log.h"
#include "misc.h"
-/* Pty allocated with _getpty gets broken if we do I_PUSH:es to it. */
-#if defined(HAVE__GETPTY) || defined(HAVE_OPENPTY)
-#undef HAVE_DEV_PTMX
-#endif
-
#ifdef HAVE_PTY_H
# include <pty.h>
#endif
-#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
-# include <sys/stropts.h>
-#endif
#ifndef O_NOCTTY
#define O_NOCTTY 0
#endif
+#ifdef __APPLE__
+# include <AvailabilityMacros.h>
+# if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+# define __APPLE_PRIVPTY__
+# endif
+#endif
+
/*
* Allocates and opens a pty. Returns 0 if no pty could be allocated, or
* nonzero if a pty was successfully allocated. On success, open file
*/
int
-pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
+pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
{
-#if defined(HAVE_OPENPTY) || defined(BSD4_4)
/* openpty(3) exists in OSF/1 and some other os'es */
char *name;
int i;
strlcpy(namebuf, name, namebuflen); /* possible truncation */
return 1;
-#else /* HAVE_OPENPTY */
-#ifdef HAVE__GETPTY
- /*
- * _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
- * pty's automagically when needed
- */
- char *slave;
-
- slave = _getpty(ptyfd, O_RDWR, 0622, 0);
- if (slave == NULL) {
- error("_getpty: %.100s", strerror(errno));
- return 0;
- }
- strlcpy(namebuf, slave, namebuflen);
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
- if (*ttyfd < 0) {
- error("%.200s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- return 1;
-#else /* HAVE__GETPTY */
-#if defined(HAVE_DEV_PTMX)
- /*
- * This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3
- * also has bsd-style ptys, but they simply do not work.)
- */
- int ptm;
- char *pts;
- mysig_t old_signal;
-
- ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY);
- if (ptm < 0) {
- error("/dev/ptmx: %.100s", strerror(errno));
- return 0;
- }
- old_signal = mysignal(SIGCHLD, SIG_DFL);
- if (grantpt(ptm) < 0) {
- error("grantpt: %.100s", strerror(errno));
- return 0;
- }
- mysignal(SIGCHLD, old_signal);
- if (unlockpt(ptm) < 0) {
- error("unlockpt: %.100s", strerror(errno));
- return 0;
- }
- pts = ptsname(ptm);
- if (pts == NULL)
- error("Slave pty side name could not be obtained.");
- strlcpy(namebuf, pts, namebuflen);
- *ptyfd = ptm;
-
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
- if (*ttyfd < 0) {
- error("%.100s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
- }
-#ifndef HAVE_CYGWIN
- /*
- * Push the appropriate streams modules, as described in Solaris pts(7).
- * HP-UX pts(7) doesn't have ttcompat module.
- */
- if (ioctl(*ttyfd, I_PUSH, "ptem") < 0)
- error("ioctl I_PUSH ptem: %.100s", strerror(errno));
- if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0)
- error("ioctl I_PUSH ldterm: %.100s", strerror(errno));
-#ifndef __hpux
- if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0)
- error("ioctl I_PUSH ttcompat: %.100s", strerror(errno));
-#endif
-#endif
- return 1;
-#else /* HAVE_DEV_PTMX */
-#ifdef HAVE_DEV_PTS_AND_PTC
- /* AIX-style pty code. */
- const char *name;
-
- *ptyfd = open("/dev/ptc", O_RDWR | O_NOCTTY);
- if (*ptyfd < 0) {
- error("Could not open /dev/ptc: %.100s", strerror(errno));
- return 0;
- }
- name = ttyname(*ptyfd);
- if (!name)
- fatal("Open of /dev/ptc returns device for which ttyname fails.");
- strlcpy(namebuf, name, namebuflen);
- *ttyfd = open(name, O_RDWR | O_NOCTTY);
- if (*ttyfd < 0) {
- error("Could not open pty slave side %.100s: %.100s",
- name, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- return 1;
-#else /* HAVE_DEV_PTS_AND_PTC */
-#ifdef _CRAY
- char buf[64];
- int i;
- int highpty;
-
-#ifdef _SC_CRAY_NPTY
- highpty = sysconf(_SC_CRAY_NPTY);
- if (highpty == -1)
- highpty = 128;
-#else
- highpty = 128;
-#endif
-
- for (i = 0; i < highpty; i++) {
- snprintf(buf, sizeof(buf), "/dev/pty/%03d", i);
- *ptyfd = open(buf, O_RDWR|O_NOCTTY);
- if (*ptyfd < 0)
- continue;
- snprintf(namebuf, namebuflen, "/dev/ttyp%03d", i);
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR|O_NOCTTY);
- if (*ttyfd < 0) {
- error("%.100s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- }
- return 1;
- }
- return 0;
-#else
- /* BSD-style pty code. */
- char buf[64];
- int i;
- const char *ptymajors = "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ";
- const char *ptyminors = "0123456789abcdef";
- int num_minors = strlen(ptyminors);
- int num_ptys = strlen(ptymajors) * num_minors;
-
- for (i = 0; i < num_ptys; i++) {
- snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors],
- ptyminors[i % num_minors]);
- snprintf(namebuf, namebuflen, "/dev/tty%c%c",
- ptymajors[i / num_minors], ptyminors[i % num_minors]);
-
- *ptyfd = open(buf, O_RDWR | O_NOCTTY);
- if (*ptyfd < 0) {
- /* Try SCO style naming */
- snprintf(buf, sizeof buf, "/dev/ptyp%d", i);
- snprintf(namebuf, namebuflen, "/dev/ttyp%d", i);
- *ptyfd = open(buf, O_RDWR | O_NOCTTY);
- if (*ptyfd < 0)
- continue;
- }
-
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
- if (*ttyfd < 0) {
- error("%.100s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- return 1;
- }
- return 0;
-#endif /* CRAY */
-#endif /* HAVE_DEV_PTS_AND_PTC */
-#endif /* HAVE_DEV_PTMX */
-#endif /* HAVE__GETPTY */
-#endif /* HAVE_OPENPTY */
}
/* Releases the tty. Its ownership is returned to root, and permissions to 0666. */
void
-pty_release(const char *ttyname)
+pty_release(const char *tty)
{
- if (chown(ttyname, (uid_t) 0, (gid_t) 0) < 0)
- error("chown %.100s 0 0 failed: %.100s", ttyname, strerror(errno));
- if (chmod(ttyname, (mode_t) 0666) < 0)
- error("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno));
+#ifndef __APPLE_PRIVPTY__
+ if (chown(tty, (uid_t) 0, (gid_t) 0) < 0)
+ error("chown %.100s 0 0 failed: %.100s", tty, strerror(errno));
+ if (chmod(tty, (mode_t) 0666) < 0)
+ error("chmod %.100s 0666 failed: %.100s", tty, strerror(errno));
+#endif /* __APPLE_PRIVPTY__ */
}
-/* Makes the tty the processes controlling tty and sets it to sane modes. */
+/* Makes the tty the process's controlling tty and sets it to sane modes. */
void
-pty_make_controlling_tty(int *ttyfd, const char *ttyname)
+pty_make_controlling_tty(int *ttyfd, const char *tty)
{
-#ifdef _CRAY
int fd;
+#ifdef USE_VHANGUP
+ void *old;
+#endif /* USE_VHANGUP */
+#ifdef _UNICOS
if (setsid() < 0)
error("setsid: %.100s", strerror(errno));
- fd = open(ttyname, O_RDWR|O_NOCTTY);
+ fd = open(tty, O_RDWR|O_NOCTTY);
if (fd != -1) {
signal(SIGHUP, SIG_IGN);
ioctl(fd, TCVHUP, (char *)NULL);
ioctl(*ttyfd, TCSETCTTY, NULL);
fd = open("/dev/tty", O_RDWR);
if (fd < 0)
- error("%.100s: %.100s", ttyname, strerror(errno));
+ error("%.100s: %.100s", tty, strerror(errno));
close(*ttyfd);
- *ttyfd = fd;
-#else
- int fd;
-#ifdef USE_VHANGUP
- void *old;
-#endif /* USE_VHANGUP */
+ *ttyfd = fd;
+#else /* _UNICOS */
/* First disconnect from the old controlling tty. */
#ifdef TIOCNOTTY
if (ioctl(*ttyfd, TIOCSCTTY, NULL) < 0)
error("ioctl(TIOCSCTTY): %.100s", strerror(errno));
#endif /* TIOCSCTTY */
-#ifdef HAVE_NEWS4
+#ifdef NEED_SETPGRP
if (setpgrp(0,0) < 0)
error("SETPGRP %s",strerror(errno));
-#endif /* HAVE_NEWS4 */
+#endif /* NEED_SETPGRP */
#ifdef USE_VHANGUP
old = signal(SIGHUP, SIG_IGN);
vhangup();
signal(SIGHUP, old);
#endif /* USE_VHANGUP */
- fd = open(ttyname, O_RDWR);
+ fd = open(tty, O_RDWR);
if (fd < 0) {
- error("%.100s: %.100s", ttyname, strerror(errno));
+ error("%.100s: %.100s", tty, strerror(errno));
} else {
#ifdef USE_VHANGUP
close(*ttyfd);
fd = open(_PATH_TTY, O_WRONLY);
if (fd < 0)
error("open /dev/tty failed - could not set controlling tty: %.100s",
- strerror(errno));
- else {
+ strerror(errno));
+ else
close(fd);
- }
-#endif
+#endif /* _UNICOS */
}
/* Changes the window size associated with the pty. */
void
-pty_change_window_size(int ptyfd, int row, int col,
- int xpixel, int ypixel)
+pty_change_window_size(int ptyfd, u_int row, u_int col,
+ u_int xpixel, u_int ypixel)
{
struct winsize w;
+
+ /* may truncate u_int -> u_short */
w.ws_row = row;
w.ws_col = col;
w.ws_xpixel = xpixel;
}
void
-pty_setowner(struct passwd *pw, const char *ttyname)
+pty_setowner(struct passwd *pw, const char *tty)
{
struct group *grp;
gid_t gid;
* Warn but continue if filesystem is read-only and the uids match/
* tty is owned by root.
*/
- if (stat(ttyname, &st))
- fatal("stat(%.100s) failed: %.100s", ttyname,
+ if (stat(tty, &st))
+ fatal("stat(%.100s) failed: %.100s", tty,
strerror(errno));
+#ifdef WITH_SELINUX
+ ssh_selinux_setup_pty(pw->pw_name, tty);
+#endif
+
if (st.st_uid != pw->pw_uid || st.st_gid != gid) {
- if (chown(ttyname, pw->pw_uid, gid) < 0) {
- if (errno == EROFS &&
- (st.st_uid == pw->pw_uid || st.st_uid == 0))
- error("chown(%.100s, %d, %d) failed: %.100s",
- ttyname, pw->pw_uid, gid,
- strerror(errno));
+ if (chown(tty, pw->pw_uid, gid) < 0) {
+ if (errno == EROFS &&
+ (st.st_uid == pw->pw_uid || st.st_uid == 0))
+ debug("chown(%.100s, %u, %u) failed: %.100s",
+ tty, (u_int)pw->pw_uid, (u_int)gid,
+ strerror(errno));
else
- fatal("chown(%.100s, %d, %d) failed: %.100s",
- ttyname, pw->pw_uid, gid,
- strerror(errno));
+ fatal("chown(%.100s, %u, %u) failed: %.100s",
+ tty, (u_int)pw->pw_uid, (u_int)gid,
+ strerror(errno));
}
}
if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode) {
- if (chmod(ttyname, mode) < 0) {
+ if (chmod(tty, mode) < 0) {
if (errno == EROFS &&
(st.st_mode & (S_IRGRP | S_IROTH)) == 0)
- error("chmod(%.100s, 0%o) failed: %.100s",
- ttyname, mode, strerror(errno));
+ debug("chmod(%.100s, 0%o) failed: %.100s",
+ tty, (u_int)mode, strerror(errno));
else
fatal("chmod(%.100s, 0%o) failed: %.100s",
- ttyname, mode, strerror(errno));
+ tty, (u_int)mode, strerror(errno));
}
}
}
andersk / openssh.git / blobdiff