X-Git-Url: http://andersk.mit.edu/gitweb/gssapi-openssh.git/blobdiff_plain/91d9cdd3ca06d1809bc05a285dafdea2954850b2..HEAD:/openssh/sshpty.c diff --git a/openssh/sshpty.c b/openssh/sshpty.c index bbbc0fe..e1e6031 100644 --- a/openssh/sshpty.c +++ b/openssh/sshpty.c @@ -1,4 +1,3 @@ -/* $OpenBSD: sshpty.c,v 1.28 2007/09/11 23:49:09 stevesk Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -13,46 +12,32 @@ */ #include "includes.h" +RCSID("$OpenBSD: sshpty.c,v 1.3 2001/07/22 21:32:27 markus Exp $"); -#include -#include -#include -#include - -#include -#include -#include -#ifdef HAVE_PATHS_H -# include -#endif -#include -#include -#include -#include #ifdef HAVE_UTIL_H # include -#endif -#include +#endif /* HAVE_UTIL_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 #endif +#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) +# include +#endif #ifndef O_NOCTTY #define O_NOCTTY 0 #endif -#ifdef __APPLE__ -# include -# 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 @@ -61,8 +46,9 @@ */ int -pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) +pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) { +#if defined(HAVE_OPENPTY) || defined(BSD4_4) /* openpty(3) exists in OSF/1 and some other os'es */ char *name; int i; @@ -78,40 +64,205 @@ pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 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 0; + } + 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 *tty) +pty_release(const char *ttyname) { -#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__ */ + 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)); } -/* Makes the tty the process's controlling tty and sets it to sane modes. */ +/* Makes the tty the processes controlling tty and sets it to sane modes. */ void -pty_make_controlling_tty(int *ttyfd, const char *tty) +pty_make_controlling_tty(int *ttyfd, const char *ttyname) { int fd; #ifdef USE_VHANGUP void *old; #endif /* USE_VHANGUP */ -#ifdef _UNICOS +#ifdef _CRAY if (setsid() < 0) error("setsid: %.100s", strerror(errno)); - fd = open(tty, O_RDWR|O_NOCTTY); + fd = open(ttyname, O_RDWR|O_NOCTTY); if (fd != -1) { - signal(SIGHUP, SIG_IGN); + mysignal(SIGHUP, SIG_IGN); ioctl(fd, TCVHUP, (char *)NULL); - signal(SIGHUP, SIG_DFL); + mysignal(SIGHUP, SIG_DFL); setpgid(0, 0); close(fd); } else { @@ -122,10 +273,10 @@ pty_make_controlling_tty(int *ttyfd, const char *tty) ioctl(*ttyfd, TCSETCTTY, NULL); fd = open("/dev/tty", O_RDWR); if (fd < 0) - error("%.100s: %.100s", tty, strerror(errno)); + error("%.100s: %.100s", ttyname, strerror(errno)); close(*ttyfd); - *ttyfd = fd; -#else /* _UNICOS */ + *ttyfd = fd; +#else /* _CRAY */ /* First disconnect from the old controlling tty. */ #ifdef TIOCNOTTY @@ -153,18 +304,18 @@ pty_make_controlling_tty(int *ttyfd, const char *tty) if (ioctl(*ttyfd, TIOCSCTTY, NULL) < 0) error("ioctl(TIOCSCTTY): %.100s", strerror(errno)); #endif /* TIOCSCTTY */ -#ifdef NEED_SETPGRP +#ifdef HAVE_NEWS4 if (setpgrp(0,0) < 0) error("SETPGRP %s",strerror(errno)); -#endif /* NEED_SETPGRP */ +#endif /* HAVE_NEWS4 */ #ifdef USE_VHANGUP - old = signal(SIGHUP, SIG_IGN); + old = mysignal(SIGHUP, SIG_IGN); vhangup(); - signal(SIGHUP, old); + mysignal(SIGHUP, old); #endif /* USE_VHANGUP */ - fd = open(tty, O_RDWR); + fd = open(ttyname, O_RDWR); if (fd < 0) { - error("%.100s: %.100s", tty, strerror(errno)); + error("%.100s: %.100s", ttyname, strerror(errno)); } else { #ifdef USE_VHANGUP close(*ttyfd); @@ -177,21 +328,20 @@ pty_make_controlling_tty(int *ttyfd, const char *tty) 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 /* _UNICOS */ + } +#endif /* _CRAY */ } /* Changes the window size associated with the pty. */ void -pty_change_window_size(int ptyfd, u_int row, u_int col, - u_int xpixel, u_int ypixel) +pty_change_window_size(int ptyfd, int row, int col, + int xpixel, int ypixel) { struct winsize w; - - /* may truncate u_int -> u_short */ w.ws_row = row; w.ws_col = col; w.ws_xpixel = xpixel; @@ -200,7 +350,7 @@ pty_change_window_size(int ptyfd, u_int row, u_int col, } void -pty_setowner(struct passwd *pw, const char *tty) +pty_setowner(struct passwd *pw, const char *ttyname) { struct group *grp; gid_t gid; @@ -222,37 +372,33 @@ pty_setowner(struct passwd *pw, const char *tty) * Warn but continue if filesystem is read-only and the uids match/ * tty is owned by root. */ - if (stat(tty, &st)) - fatal("stat(%.100s) failed: %.100s", tty, + if (stat(ttyname, &st)) + fatal("stat(%.100s) failed: %.100s", ttyname, 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(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)); + 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)); else - fatal("chown(%.100s, %u, %u) failed: %.100s", - tty, (u_int)pw->pw_uid, (u_int)gid, - strerror(errno)); + fatal("chown(%.100s, %d, %d) failed: %.100s", + ttyname, pw->pw_uid, gid, + strerror(errno)); } } if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode) { - if (chmod(tty, mode) < 0) { + if (chmod(ttyname, mode) < 0) { if (errno == EROFS && (st.st_mode & (S_IRGRP | S_IROTH)) == 0) - debug("chmod(%.100s, 0%o) failed: %.100s", - tty, (u_int)mode, strerror(errno)); + error("chmod(%.100s, 0%o) failed: %.100s", + ttyname, mode, strerror(errno)); else fatal("chmod(%.100s, 0%o) failed: %.100s", - tty, (u_int)mode, strerror(errno)); + ttyname, mode, strerror(errno)); } } }