diff options
Diffstat (limited to 'session.c')
| -rw-r--r-- | session.c | 117 |
1 files changed, 62 insertions, 55 deletions
@@ -33,7 +33,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: session.c,v 1.129 2002/03/18 03:41:08 provos Exp $"); +RCSID("$OpenBSD: session.c,v 1.130 2002/03/18 17:50:31 provos Exp $"); #include "ssh.h" #include "ssh1.h" @@ -56,6 +56,7 @@ RCSID("$OpenBSD: session.c,v 1.129 2002/03/18 03:41:08 provos Exp $"); #include "serverloop.h" #include "canohost.h" #include "session.h" +#include "monitor_wrap.h" #ifdef HAVE_CYGWIN #include <windows.h> @@ -63,39 +64,11 @@ RCSID("$OpenBSD: session.c,v 1.129 2002/03/18 03:41:08 provos Exp $"); #define is_winnt (GetVersion() < 0x80000000) #endif -/* types */ - -#define TTYSZ 64 -typedef struct Session Session; -struct Session { - int used; - int self; - struct passwd *pw; - Authctxt *authctxt; - pid_t pid; - /* tty */ - char *term; - int ptyfd, ttyfd, ptymaster; - int row, col, xpixel, ypixel; - char tty[TTYSZ]; - /* X11 */ - int display_number; - char *display; - int screen; - char *auth_display; - char *auth_proto; - char *auth_data; - int single_connection; - /* proto 2 */ - int chanid; - int is_subsystem; -}; - /* func */ Session *session_new(void); void session_set_fds(Session *, int, int, int); -static void session_pty_cleanup(void *); +void session_pty_cleanup(void *); void session_proctitle(Session *); int session_setup_x11fwd(Session *); void do_exec_pty(Session *, const char *); @@ -112,7 +85,6 @@ int check_quietlogin(Session *, const char *); static void do_authenticated1(Authctxt *); static void do_authenticated2(Authctxt *); -static void session_close(Session *); static int session_pty_req(Session *); /* import */ @@ -1087,7 +1059,7 @@ do_nologin(struct passwd *pw) } /* Set login name, uid, gid, and groups. */ -static void +void do_setusercontext(struct passwd *pw) { #ifdef HAVE_CYGWIN @@ -1142,6 +1114,23 @@ do_setusercontext(struct passwd *pw) fatal("Failed to set uids to %u.", (u_int) pw->pw_uid); } +void +launch_login(struct passwd *pw, const char *hostname) +{ + /* Launch login(1). */ + + execl("/usr/bin/login", "login", "-h", hostname, +#ifdef LOGIN_NEEDS_TERM + (s->term ? s->term : "unknown"), +#endif /* LOGIN_NEEDS_TERM */ + "-p", "-f", "--", pw->pw_name, (char *)NULL); + + /* Login couldn't be executed, die. */ + + perror("login"); + exit(1); +} + /* * Performs common processing for the child, such as setting up the * environment, closing extra file descriptors, setting the user and group @@ -1267,18 +1256,8 @@ do_child(Session *s, const char *command) signal(SIGPIPE, SIG_DFL); if (options.use_login) { - /* Launch login(1). */ - - execl(LOGIN_PROGRAM, "login", "-h", hostname, -#ifdef LOGIN_NEEDS_TERM - (s->term ? s->term : "unknown"), -#endif /* LOGIN_NEEDS_TERM */ - "-p", "-f", "--", pw->pw_name, (char *)NULL); - - /* Login couldn't be executed, die. */ - - perror("login"); - exit(1); + launch_login(pw, hostname); + /* NEVERREACHED */ } /* Get the last component of the shell name. */ @@ -1388,6 +1367,22 @@ session_open(Authctxt *authctxt, int chanid) return 1; } +Session * +session_by_tty(char *tty) +{ + int i; + for (i = 0; i < MAX_SESSIONS; i++) { + Session *s = &sessions[i]; + if (s->used && s->ttyfd != -1 && strcmp(s->tty, tty) == 0) { + debug("session_by_tty: session %d tty %s", i, tty); + return s; + } + } + debug("session_by_tty: unknown tty %.100s", tty); + session_dump(); + return NULL; +} + static Session * session_by_channel(int id) { @@ -1436,7 +1431,7 @@ session_pty_req(Session *s) { u_int len; int n_bytes; - + if (no_pty_flag) { debug("Allocating a pty not permitted for this authentication."); return 0; @@ -1465,7 +1460,7 @@ session_pty_req(Session *s) /* Allocate a pty and open it. */ debug("Allocating pty."); - if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty))) { + if (!PRIVSEP(pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)))) { if (s->term) xfree(s->term); s->term = NULL; @@ -1486,7 +1481,8 @@ session_pty_req(Session *s) * time in case we call fatal() (e.g., the connection gets closed). */ fatal_add_cleanup(session_pty_cleanup, (void *)s); - pty_setowner(s->pw, s->tty); + if (!use_privsep) + pty_setowner(s->pw, s->tty); /* Set window size from the packet. */ pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); @@ -1649,8 +1645,8 @@ session_set_fds(Session *s, int fdin, int fdout, int fderr) * Function to perform pty cleanup. Also called if we get aborted abnormally * (e.g., due to a dropped connection). */ -static void -session_pty_cleanup(void *session) +void +session_pty_cleanup2(void *session) { Session *s = session; @@ -1668,7 +1664,8 @@ session_pty_cleanup(void *session) record_logout(s->pid, s->tty, s->pw->pw_name); /* Release the pseudo-tty. */ - pty_release(s->tty); + if (getuid() == 0) + pty_release(s->tty); /* * Close the server side of the socket pairs. We must do this after @@ -1676,12 +1673,18 @@ session_pty_cleanup(void *session) * while we're still cleaning up. */ if (close(s->ptymaster) < 0) - error("close(s->ptymaster): %s", strerror(errno)); + error("close(s->ptymaster/%d): %s", s->ptymaster, strerror(errno)); /* unlink pty from session */ s->ttyfd = -1; } +void +session_pty_cleanup(void *session) +{ + PRIVSEP(session_pty_cleanup2(session)); +} + static void session_exit_message(Session *s, int status) { @@ -1727,7 +1730,7 @@ session_exit_message(Session *s, int status) s->chanid = -1; } -static void +void session_close(Session *s) { debug("session_close: session %d pid %d", s->self, s->pid); @@ -1794,13 +1797,17 @@ session_close_by_channel(int id, void *arg) } void -session_destroy_all(void) +session_destroy_all(void (*closefunc)(Session *)) { int i; for (i = 0; i < MAX_SESSIONS; i++) { Session *s = &sessions[i]; - if (s->used) - session_close(s); + if (s->used) { + if (closefunc != NULL) + closefunc(s); + else + session_close(s); + } } } |