+/* $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 1.11 2004/01/11 21:55:06 deraadt 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"
#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)
{
/* openpty(3) exists in OSF/1 and some other os'es */
char *name;
/* 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 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)
{
int fd;
#ifdef USE_VHANGUP
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 /* _UNICOS */
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);
/* 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 (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",
- ttyname, (u_int)pw->pw_uid, (u_int)gid,
+ tty, (u_int)pw->pw_uid, (u_int)gid,
strerror(errno));
else
fatal("chown(%.100s, %u, %u) failed: %.100s",
- ttyname, (u_int)pw->pw_uid, (u_int)gid,
+ 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)
debug("chmod(%.100s, 0%o) failed: %.100s",
- ttyname, (u_int)mode, strerror(errno));
+ tty, (u_int)mode, strerror(errno));
else
fatal("chmod(%.100s, 0%o) failed: %.100s",
- ttyname, (u_int)mode, strerror(errno));
+ tty, (u_int)mode, strerror(errno));
}
}
}