*/
#include "includes.h"
-RCSID("$OpenBSD: session.c,v 1.119 2002/01/27 14:57:46 stevesk Exp $");
+RCSID("$OpenBSD: session.c,v 1.134 2002/03/29 18:59:31 markus Exp $");
#include "ssh.h"
#include "ssh1.h"
#include "serverloop.h"
#include "canohost.h"
#include "session.h"
-
-#ifdef WITH_IRIX_PROJECT
-#include <proj.h>
-#endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_JOBS
-#include <sys/resource.h>
-#endif
-#ifdef WITH_IRIX_AUDIT
-#include <sat.h>
-#endif /* WITH_IRIX_AUDIT */
-
-#if defined(HAVE_USERSEC_H)
-#include <usersec.h>
-#endif
+#include "monitor_wrap.h"
#ifdef HAVE_CYGWIN
#include <windows.h>
#define is_winnt (GetVersion() < 0x80000000)
#endif
-/* AIX limits */
-#if defined(HAVE_GETUSERATTR) && !defined(S_UFSIZE_HARD) && defined(S_UFSIZE)
-# define S_UFSIZE_HARD S_UFSIZE "_hard"
-# define S_UCPU_HARD S_UCPU "_hard"
-# define S_UDATA_HARD S_UDATA "_hard"
-# define S_USTACK_HARD S_USTACK "_hard"
-# define S_URSS_HARD S_URSS "_hard"
-# define S_UCORE_HARD S_UCORE "_hard"
-# define S_UNOFILE_HARD S_UNOFILE "_hard"
-#endif
-
-#ifdef _AIX
-# include <uinfo.h>
-#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 *);
static void do_authenticated1(Authctxt *);
static void do_authenticated2(Authctxt *);
-static void session_close(Session *);
static int session_pty_req(Session *);
/* import */
#endif /* WITH_AIXAUTHENTICATE */
#ifdef HAVE_LOGIN_CAP
-static login_cap_t *lc;
+login_cap_t *lc;
#endif
void
close(startup_pipe);
startup_pipe = -1;
}
-#if defined(HAVE_LOGIN_CAP) && defined(HAVE_PW_CLASS_IN_PASSWD)
- if ((lc = login_getclass(authctxt->pw->pw_class)) == NULL) {
- error("unable to get login class");
- return;
- }
-#ifdef BSD_AUTH
- if (auth_approval(NULL, lc, authctxt->pw->pw_name, "ssh") <= 0) {
- packet_disconnect("Approval failure for %s",
- authctxt->pw->pw_name);
- }
-#endif
-#endif
#ifdef WITH_AIXAUTHENTICATE
/* We don't have a pty yet, so just label the line as "ssh" */
if (loginsuccess(authctxt->user,
- get_canonical_hostname(options.reverse_mapping_check),
+ get_canonical_hostname(options.verify_reverse_mapping),
"ssh", &aixloginmsg) < 0)
aixloginmsg = NULL;
#endif /* WITH_AIXAUTHENTICATE */
}
record_utmp_only(pid, s->tty, s->pw->pw_name,
- get_remote_name_or_ip(utmp_len, options.reverse_mapping_check),
+ get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping),
(struct sockaddr *)&from);
}
#endif
original_command = NULL;
}
+
/* administrative, login(1)-like work */
void
do_login(Session *s, const char *command)
{
char *time_string;
- char hostname[MAXHOSTNAMELEN];
socklen_t fromlen;
struct sockaddr_storage from;
- time_t last_login_time;
struct passwd * pw = s->pw;
pid_t pid = getpid();
if (packet_connection_is_on_socket()) {
fromlen = sizeof(from);
if (getpeername(packet_get_connection_in(),
- (struct sockaddr *) & from, &fromlen) < 0) {
+ (struct sockaddr *) & from, &fromlen) < 0) {
debug("getpeername: %.100s", strerror(errno));
fatal_cleanup();
}
}
- /* Get the time and hostname when the user last logged in. */
- if (options.print_lastlog) {
- hostname[0] = '\0';
- last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name,
- hostname, sizeof(hostname));
- }
-
/* Record that there was a login on that tty from the remote host. */
- record_login(pid, s->tty, pw->pw_name, pw->pw_uid,
- get_remote_name_or_ip(utmp_len, options.reverse_mapping_check),
- (struct sockaddr *)&from);
+ if (!use_privsep)
+ record_login(pid, s->tty, pw->pw_name, pw->pw_uid,
+ get_remote_name_or_ip(utmp_len,
+ options.verify_reverse_mapping),
+ (struct sockaddr *)&from);
#ifdef USE_PAM
/*
printf("%s\n", aixloginmsg);
#endif /* WITH_AIXAUTHENTICATE */
- if (options.print_lastlog && last_login_time != 0) {
- time_string = ctime(&last_login_time);
+ if (options.print_lastlog && s->last_login_time != 0) {
+ time_string = ctime(&s->last_login_time);
if (strchr(time_string, '\n'))
*strchr(time_string, '\n') = 0;
- if (strcmp(hostname, "") == 0)
+ if (strcmp(s->hostname, "") == 0)
printf("Last login: %s\r\n", time_string);
else
- printf("Last login: %s from %s\r\n", time_string, hostname);
+ printf("Last login: %s from %s\r\n", time_string,
+ s->hostname);
}
do_motd();
}
}
-#if defined(HAVE_GETUSERATTR)
-/*
- * AIX-specific login initialisation
- */
-void set_limit(char *user, char *soft, char *hard, int resource, int mult)
-{
- struct rlimit rlim;
- int slim, hlim;
-
- getrlimit(resource, &rlim);
-
- slim = 0;
- if (getuserattr(user, soft, &slim, SEC_INT) != -1) {
- if (slim < 0) {
- rlim.rlim_cur = RLIM_INFINITY;
- } else if (slim != 0) {
- /* See the wackiness below */
- if (rlim.rlim_cur == slim * mult)
- slim = 0;
- else
- rlim.rlim_cur = slim * mult;
- }
- }
-
- hlim = 0;
- if (getuserattr(user, hard, &hlim, SEC_INT) != -1) {
- if (hlim < 0) {
- rlim.rlim_max = RLIM_INFINITY;
- } else if (hlim != 0) {
- rlim.rlim_max = hlim * mult;
- }
- }
-
- /*
- * XXX For cpu and fsize the soft limit is set to the hard limit
- * if the hard limit is left at its default value and the soft limit
- * is changed from its default value, either by requesting it
- * (slim == 0) or by setting it to the current default. At least
- * that's how rlogind does it. If you're confused you're not alone.
- * Bug or feature? AIX 4.3.1.2
- */
- if ((!strcmp(soft, "fsize") || !strcmp(soft, "cpu"))
- && hlim == 0 && slim != 0)
- rlim.rlim_max = rlim.rlim_cur;
- /* A specified hard limit limits the soft limit */
- else if (hlim > 0 && rlim.rlim_cur > rlim.rlim_max)
- rlim.rlim_cur = rlim.rlim_max;
- /* A soft limit can increase a hard limit */
- else if (rlim.rlim_cur > rlim.rlim_max)
- rlim.rlim_max = rlim.rlim_cur;
-
- if (setrlimit(resource, &rlim) != 0)
- error("setrlimit(%.10s) failed: %.100s", soft, strerror(errno));
-}
-
-void set_limits_from_userattr(char *user)
-{
- int mask;
- char buf[16];
-
- set_limit(user, S_UFSIZE, S_UFSIZE_HARD, RLIMIT_FSIZE, 512);
- set_limit(user, S_UCPU, S_UCPU_HARD, RLIMIT_CPU, 1);
- set_limit(user, S_UDATA, S_UDATA_HARD, RLIMIT_DATA, 512);
- set_limit(user, S_USTACK, S_USTACK_HARD, RLIMIT_STACK, 512);
- set_limit(user, S_URSS, S_URSS_HARD, RLIMIT_RSS, 512);
- set_limit(user, S_UCORE, S_UCORE_HARD, RLIMIT_CORE, 512);
-#if defined(S_UNOFILE)
- set_limit(user, S_UNOFILE, S_UNOFILE_HARD, RLIMIT_NOFILE, 1);
-#endif
-
- if (getuserattr(user, S_UMASK, &mask, SEC_INT) != -1) {
- /* Convert decimal to octal */
- (void) snprintf(buf, sizeof(buf), "%d", mask);
- if (sscanf(buf, "%o", &mask) == 1)
- umask(mask);
- }
-}
-#endif /* defined(HAVE_GETUSERATTR) */
-
-/*
- * Performs common processing for the child, such as setting up the
- * environment, closing extra file descriptors, setting the user and group
- * ids, and executing the command or shell.
- */
-void
-do_child(Session *s, const char *command)
+static char **
+do_setup_env(Session *s, const char *shell)
{
- const char *shell, *hostname = NULL, *cp = NULL;
- struct passwd *pw = s->pw;
char buf[256];
- char cmd[1024];
- FILE *f = NULL;
- u_int envsize, i;
+ u_int i, envsize;
char **env;
- extern char **environ;
- struct stat st;
- char *argv[10];
- int do_xauth;
-#ifdef WITH_IRIX_PROJECT
- prid_t projid;
-#endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_JOBS
- jid_t jid = 0;
-#else
-#ifdef WITH_IRIX_ARRAY
- int jid = 0;
-#endif /* WITH_IRIX_ARRAY */
-#endif /* WITH_IRIX_JOBS */
-
- do_xauth =
- s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL;
-
- /* remove hostkey from the child's memory */
- destroy_sensitive_data();
-
- /* login(1) is only called if we execute the login shell */
- if (options.use_login && command != NULL)
- options.use_login = 0;
-
-#if !defined(HAVE_OSF_SIA)
- if (!options.use_login) {
-# ifdef HAVE_LOGIN_CAP
- if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid)
- f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN,
- _PATH_NOLOGIN), "r");
-# else /* HAVE_LOGIN_CAP */
- if (pw->pw_uid)
- f = fopen(_PATH_NOLOGIN, "r");
-# endif /* HAVE_LOGIN_CAP */
- if (f) {
- /* /etc/nologin exists. Print its contents and exit. */
- while (fgets(buf, sizeof(buf), f))
- fputs(buf, stderr);
- fclose(f);
- exit(254);
- }
- }
-#endif /* HAVE_OSF_SIA */
-
- /* Set login name, uid, gid, and groups. */
- /* Login(1) does this as well, and it needs uid 0 for the "-h"
- switch, so we let login(1) to this for us. */
- if (!options.use_login) {
-#ifdef HAVE_OSF_SIA
- session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty);
- if (!check_quietlogin(s, command))
- do_motd();
-#else /* HAVE_OSF_SIA */
-#ifdef HAVE_CYGWIN
- if (is_winnt) {
-#else
- if (getuid() == 0 || geteuid() == 0) {
-#endif
-# ifdef HAVE_GETUSERATTR
- set_limits_from_userattr(pw->pw_name);
-# endif /* HAVE_GETUSERATTR */
-# ifdef HAVE_LOGIN_CAP
- if (setusercontext(lc, pw, pw->pw_uid,
- (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) {
- perror("unable to set user context");
- exit(1);
- }
-# else /* HAVE_LOGIN_CAP */
-#if defined(HAVE_GETLUID) && defined(HAVE_SETLUID)
- /* Sets login uid for accounting */
- if (getluid() == -1 && setluid(pw->pw_uid) == -1)
- error("setluid: %s", strerror(errno));
-#endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */
-
- if (setlogin(pw->pw_name) < 0)
- error("setlogin failed: %s", strerror(errno));
- if (setgid(pw->pw_gid) < 0) {
- perror("setgid");
- exit(1);
- }
- /* Initialize the group list. */
- if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
- perror("initgroups");
- exit(1);
- }
- endgrent();
-# ifdef USE_PAM
- /*
- * PAM credentials may take the form of
- * supplementary groups. These will have been
- * wiped by the above initgroups() call.
- * Reestablish them here.
- */
- do_pam_setcred(0);
-# endif /* USE_PAM */
-# ifdef WITH_IRIX_JOBS
- jid = jlimit_startjob(pw->pw_name, pw->pw_uid, "interactive");
- if (jid == -1) {
- fatal("Failed to create job container: %.100s",
- strerror(errno));
- }
-# endif /* WITH_IRIX_JOBS */
-# ifdef WITH_IRIX_ARRAY
- /* initialize array session */
- if (jid == 0) {
- if (newarraysess() != 0)
- fatal("Failed to set up new array session: %.100s",
- strerror(errno));
- }
-# endif /* WITH_IRIX_ARRAY */
-# ifdef WITH_IRIX_PROJECT
- /* initialize irix project info */
- if ((projid = getdfltprojuser(pw->pw_name)) == -1) {
- debug("Failed to get project id, using projid 0");
- projid = 0;
- }
- if (setprid(projid))
- fatal("Failed to initialize project %d for %s: %.100s",
- (int)projid, pw->pw_name, strerror(errno));
-# endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_AUDIT
- if (sysconf(_SC_AUDIT)) {
- debug("Setting sat id to %d", (int) pw->pw_uid);
- if (satsetid(pw->pw_uid))
- debug("error setting satid: %.100s", strerror(errno));
- }
-#endif /* WITH_IRIX_AUDIT */
-
-#ifdef _AIX
- /*
- * AIX has a "usrinfo" area where logname and
- * other stuff is stored - a few applications
- * actually use this and die if it's not set
- */
- if (s->ttyfd == -1)
- s->tty[0] = '\0';
- cp = xmalloc(22 + strlen(s->tty) +
- 2 * strlen(pw->pw_name));
- i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c",
- pw->pw_name, 0, pw->pw_name, 0, s->tty, 0, 0);
- if (usrinfo(SETUINFO, cp, i) == -1)
- fatal("Couldn't set usrinfo: %s",
- strerror(errno));
- debug3("AIX/UsrInfo: set len %d", i);
- xfree(cp);
-#endif
-
- /* Permanently switch to the desired uid. */
- permanently_set_uid(pw);
-# endif /* HAVE_LOGIN_CAP */
- }
-#endif /* HAVE_OSF_SIA */
-
-#ifdef HAVE_CYGWIN
- if (is_winnt)
-#endif
- if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
- fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
- }
- /*
- * Get the shell from the password data. An empty shell field is
- * legal, and means /bin/sh.
- */
- shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
-#ifdef HAVE_LOGIN_CAP
- shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
-#endif
+ struct passwd *pw = s->pw;
/* Initialize the environment. */
envsize = 100;
while (custom_environment) {
struct envstring *ce = custom_environment;
char *s = ce->s;
- int i;
+
for (i = 0; s[i] != '=' && s[i]; i++)
;
if (s[i] == '=') {
}
snprintf(buf, sizeof buf, "%.50s %d %d",
- get_remote_ipaddr(), get_remote_port(), get_local_port());
+ get_remote_ipaddr(), get_remote_port(), get_local_port());
child_set_env(&env, &envsize, "SSH_CLIENT", buf);
if (s->ttyfd != -1)
original_command);
#ifdef _AIX
- if ((cp = getenv("AUTHSTATE")) != NULL)
- child_set_env(&env, &envsize, "AUTHSTATE", cp);
- if ((cp = getenv("KRB5CCNAME")) != NULL)
- child_set_env(&env, &envsize, "KRB5CCNAME", cp);
- read_environment_file(&env, &envsize, "/etc/environment");
+ {
+ char *cp;
+
+ if ((cp = getenv("AUTHSTATE")) != NULL)
+ child_set_env(&env, &envsize, "AUTHSTATE", cp);
+ if ((cp = getenv("KRB5CCNAME")) != NULL)
+ child_set_env(&env, &envsize, "KRB5CCNAME", cp);
+ read_environment_file(&env, &envsize, "/etc/environment");
+ }
#endif
#ifdef KRB4
if (s->authctxt->krb4_ticket_file)
for (i = 0; env[i]; i++)
fprintf(stderr, " %.200s\n", env[i]);
}
+ return env;
+}
+
+/*
+ * Run $HOME/.ssh/rc, /etc/ssh/sshrc, or xauth (whichever is found
+ * first in this order).
+ */
+static void
+do_rc_files(Session *s, const char *shell)
+{
+ FILE *f = NULL;
+ char cmd[1024];
+ int do_xauth;
+ struct stat st;
+
+ do_xauth =
+ s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL;
+
+ /* ignore _PATH_SSH_USER_RC for subsystems */
+ if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) {
+ snprintf(cmd, sizeof cmd, "%s -c '%s %s'",
+ shell, _PATH_BSHELL, _PATH_SSH_USER_RC);
+ if (debug_flag)
+ fprintf(stderr, "Running %s\n", cmd);
+ f = popen(cmd, "w");
+ if (f) {
+ if (do_xauth)
+ fprintf(f, "%s %s\n", s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else
+ fprintf(stderr, "Could not run %s\n",
+ _PATH_SSH_USER_RC);
+ } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) {
+ if (debug_flag)
+ fprintf(stderr, "Running %s %s\n", _PATH_BSHELL,
+ _PATH_SSH_SYSTEM_RC);
+ f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w");
+ if (f) {
+ if (do_xauth)
+ fprintf(f, "%s %s\n", s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else
+ fprintf(stderr, "Could not run %s\n",
+ _PATH_SSH_SYSTEM_RC);
+ } else if (do_xauth && options.xauth_location != NULL) {
+ /* Add authority data to .Xauthority if appropriate. */
+ if (debug_flag) {
+ fprintf(stderr,
+ "Running %.100s add "
+ "%.100s %.100s %.100s\n",
+ options.xauth_location, s->auth_display,
+ s->auth_proto, s->auth_data);
+ }
+ snprintf(cmd, sizeof cmd, "%s -q -",
+ options.xauth_location);
+ f = popen(cmd, "w");
+ if (f) {
+ fprintf(f, "add %s %s %s\n",
+ s->auth_display, s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else {
+ fprintf(stderr, "Could not run %s\n",
+ cmd);
+ }
+ }
+}
+
+static void
+do_nologin(struct passwd *pw)
+{
+ FILE *f = NULL;
+ char buf[1024];
+
+#ifdef HAVE_LOGIN_CAP
+ if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid)
+ f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN,
+ _PATH_NOLOGIN), "r");
+#else
+ if (pw->pw_uid)
+ f = fopen(_PATH_NOLOGIN, "r");
+#endif
+ if (f) {
+ /* /etc/nologin exists. Print its contents and exit. */
+ while (fgets(buf, sizeof(buf), f))
+ fputs(buf, stderr);
+ fclose(f);
+ exit(254);
+ }
+}
+
+/* Set login name, uid, gid, and groups. */
+void
+do_setusercontext(struct passwd *pw)
+{
+#ifdef HAVE_CYGWIN
+ if (is_winnt) {
+#else /* HAVE_CYGWIN */
+ if (getuid() == 0 || geteuid() == 0) {
+#endif /* HAVE_CYGWIN */
+#ifdef HAVE_GETUSERATTR
+ set_limits_from_userattr(pw->pw_name);
+#endif /* HAVE_GETUSERATTR */
+#ifdef HAVE_LOGIN_CAP
+ if (setusercontext(lc, pw, pw->pw_uid,
+ (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) {
+ perror("unable to set user context");
+ exit(1);
+ }
+#else
+# if defined(HAVE_GETLUID) && defined(HAVE_SETLUID)
+ /* Sets login uid for accounting */
+ if (getluid() == -1 && setluid(pw->pw_uid) == -1)
+ error("setluid: %s", strerror(errno));
+# endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */
+
+ if (setlogin(pw->pw_name) < 0)
+ error("setlogin failed: %s", strerror(errno));
+ if (setgid(pw->pw_gid) < 0) {
+ perror("setgid");
+ exit(1);
+ }
+ /* Initialize the group list. */
+ if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
+ perror("initgroups");
+ exit(1);
+ }
+ endgrent();
+# ifdef USE_PAM
+ /*
+ * PAM credentials may take the form of supplementary groups.
+ * These will have been wiped by the above initgroups() call.
+ * Reestablish them here.
+ */
+ do_pam_setcred(0);
+# endif /* USE_PAM */
+# if defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY)
+ irix_setusercontext(pw);
+# endif /* defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY) */
+ /* Permanently switch to the desired uid. */
+ permanently_set_uid(pw);
+#endif
+ }
+ if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
+ fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
+}
+
+static void
+launch_login(struct passwd *pw, const char *hostname)
+{
+ /* Launch login(1). */
+
+ execl("/usr/bin/login", "login", "-h", hostname,
+#ifdef xxxLOGIN_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
+ * ids, and executing the command or shell.
+ */
+void
+do_child(Session *s, const char *command)
+{
+ extern char **environ;
+ char **env;
+ char *argv[10];
+ const char *shell, *shell0, *hostname = NULL;
+ struct passwd *pw = s->pw;
+ u_int i;
+
+ /* remove hostkey from the child's memory */
+ destroy_sensitive_data();
+
+ /* login(1) is only called if we execute the login shell */
+ if (options.use_login && command != NULL)
+ options.use_login = 0;
+
+ /*
+ * Login(1) does this as well, and it needs uid 0 for the "-h"
+ * switch, so we let login(1) to this for us.
+ */
+ if (!options.use_login) {
+#ifdef HAVE_OSF_SIA
+ session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty);
+ if (!check_quietlogin(s, command))
+ do_motd();
+#else /* HAVE_OSF_SIA */
+ do_nologin(pw);
+# ifdef _AIX
+ aix_usrinfo(pw, s->tty, s->ttyfd);
+# endif /* _AIX */
+ do_setusercontext(pw);
+#endif /* HAVE_OSF_SIA */
+ }
+
+ /*
+ * Get the shell from the password data. An empty shell field is
+ * legal, and means /bin/sh.
+ */
+ shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
+#ifdef HAVE_LOGIN_CAP
+ shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
+#endif
+
+ env = do_setup_env(s, shell);
+
/* we have to stash the hostname before we close our socket. */
if (options.use_login)
hostname = get_remote_name_or_ip(utmp_len,
- options.reverse_mapping_check);
+ options.verify_reverse_mapping);
/*
* Close the connection descriptors; note that this is the child, and
* the server will still have the socket open, and it is important
close(i);
/*
- * Must take new environment into use so that .ssh/rc, /etc/sshrc and
- * xauth are run in the proper environment.
+ * Must take new environment into use so that .ssh/rc,
+ * /etc/ssh/sshrc and xauth are run in the proper environment.
*/
environ = env;
#endif
}
- /*
- * Run $HOME/.ssh/rc, /etc/sshrc, or xauth (whichever is found first
- * in this order).
- */
- if (!options.use_login) {
- /* ignore _PATH_SSH_USER_RC for subsystems */
- if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) {
- snprintf(cmd, sizeof cmd, "%s -c '%s %s'",
- shell, _PATH_BSHELL, _PATH_SSH_USER_RC);
- if (debug_flag)
- fprintf(stderr, "Running %s\n", cmd);
- f = popen(cmd, "w");
- if (f) {
- if (do_xauth)
- fprintf(f, "%s %s\n", s->auth_proto,
- s->auth_data);
- pclose(f);
- } else
- fprintf(stderr, "Could not run %s\n",
- _PATH_SSH_USER_RC);
- } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) {
- if (debug_flag)
- fprintf(stderr, "Running %s %s\n", _PATH_BSHELL,
- _PATH_SSH_SYSTEM_RC);
- f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w");
- if (f) {
- if (do_xauth)
- fprintf(f, "%s %s\n", s->auth_proto,
- s->auth_data);
- pclose(f);
- } else
- fprintf(stderr, "Could not run %s\n",
- _PATH_SSH_SYSTEM_RC);
- } else if (do_xauth && options.xauth_location != NULL) {
- /* Add authority data to .Xauthority if appropriate. */
- if (debug_flag) {
- fprintf(stderr,
- "Running %.100s add "
- "%.100s %.100s %.100s\n",
- options.xauth_location, s->auth_display,
- s->auth_proto, s->auth_data);
- }
- snprintf(cmd, sizeof cmd, "%s -q -",
- options.xauth_location);
- f = popen(cmd, "w");
- if (f) {
- fprintf(f, "add %s %s %s\n",
- s->auth_display, s->auth_proto,
- s->auth_data);
- pclose(f);
- } else {
- fprintf(stderr, "Could not run %s\n",
- cmd);
- }
- }
- /* Get the last component of the shell name. */
- cp = strrchr(shell, '/');
- if (cp)
- cp++;
- else
- cp = shell;
- }
+ if (!options.use_login)
+ do_rc_files(s, shell);
/* restore SIGPIPE for child */
signal(SIGPIPE, SIG_DFL);
+ if (options.use_login) {
+ launch_login(pw, hostname);
+ /* NEVERREACHED */
+ }
+
+ /* Get the last component of the shell name. */
+ if ((shell0 = strrchr(shell, '/')) != NULL)
+ shell0++;
+ else
+ shell0 = shell;
+
/*
* If we have no command, execute the shell. In this case, the shell
* name to be passed in argv[0] is preceded by '-' to indicate that
* this is a login shell.
*/
if (!command) {
- if (!options.use_login) {
- char buf[256];
-
- /* Start the shell. Set initial character to '-'. */
- buf[0] = '-';
- strlcpy(buf + 1, cp, sizeof(buf) - 1);
+ char argv0[256];
- /* Execute the shell. */
- argv[0] = buf;
- argv[1] = NULL;
- execve(shell, argv, env);
+ /* Start the shell. Set initial character to '-'. */
+ argv0[0] = '-';
- /* Executing the shell failed. */
+ if (strlcpy(argv0 + 1, shell0, sizeof(argv0) - 1)
+ >= sizeof(argv0) - 1) {
+ errno = EINVAL;
perror(shell);
exit(1);
+ }
- } else {
- /* Launch login(1). */
-
- execl(LOGIN_PROGRAM, "login", "-h", hostname,
-#ifdef LOGIN_NEEDS_TERM
- s->term? s->term : "unknown",
-#endif
- "-p", "-f", "--", pw->pw_name, (char *)NULL);
-
- /* Login couldn't be executed, die. */
+ /* Execute the shell. */
+ argv[0] = argv0;
+ argv[1] = NULL;
+ execve(shell, argv, env);
- perror("login");
- exit(1);
- }
+ /* Executing the shell failed. */
+ perror(shell);
+ exit(1);
}
/*
* Execute the command using the user's shell. This uses the -c
* option to execute the command.
*/
- argv[0] = (char *) cp;
+ argv[0] = (char *) shell0;
argv[1] = "-c";
argv[2] = (char *) command;
argv[3] = NULL;
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)
{
packet_disconnect("Protocol error: you already have a pty.");
return 0;
}
+ /* Get the time and hostname when the user last logged in. */
+ if (options.print_lastlog) {
+ s->hostname[0] = '\0';
+ s->last_login_time = get_last_login_time(s->pw->pw_uid,
+ s->pw->pw_name, s->hostname, sizeof(s->hostname));
+ }
s->term = packet_get_string(&len);
/* 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;
* 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);
int i;
packet_check_eom();
- log("subsystem request for %s", subsys);
+ log("subsystem request for %.100s", subsys);
for (i = 0; i < options.num_subsystems; i++) {
if (strcmp(subsys, options.subsystem_name[i]) == 0) {
s->is_subsystem = 1;
do_exec(s, cmd);
success = 1;
+ break;
}
}
if (!success)
- log("subsystem request for %s failed, subsystem not found",
+ log("subsystem request for %.100s failed, subsystem not found",
subsys);
xfree(subsys);
}
}
-void
-session_input_channel_req(int id, void *arg)
+int
+session_input_channel_req(Channel *c, const char *rtype)
{
- u_int len;
- int reply;
int success = 0;
- char *rtype;
Session *s;
- Channel *c;
- rtype = packet_get_string(&len);
- reply = packet_get_char();
-
- s = session_by_channel(id);
- if (s == NULL)
- fatal("session_input_channel_req: channel %d: no session", id);
- c = channel_lookup(id);
- if (c == NULL)
- fatal("session_input_channel_req: channel %d: bad channel", id);
-
- debug("session_input_channel_req: session %d channel %d request %s reply %d",
- s->self, id, rtype, reply);
+ if ((s = session_by_channel(c->self)) == NULL) {
+ log("session_input_channel_req: no session %d req %.100s",
+ c->self, rtype);
+ return 0;
+ }
+ debug("session_input_channel_req: session %d req %s", s->self, rtype);
/*
* a session is in LARVAL state until a shell, a command
if (strcmp(rtype, "window-change") == 0) {
success = session_window_change_req(s);
}
-
- if (reply) {
- packet_start(success ?
- SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
- packet_put_int(c->remote_id);
- packet_send();
- }
- xfree(rtype);
+ return success;
}
void
channel_set_fds(s->chanid,
fdout, fdin, fderr,
fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
- 1);
+ 1,
+ CHAN_SES_WINDOW_DEFAULT);
}
/*
* 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;
/* Record that the user has logged out. */
if (s->pid != 0)
- record_logout(s->pid, s->tty);
+ 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
* 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)
{
Channel *c;
- if (s == NULL)
- fatal("session_close: no session");
- c = channel_lookup(s->chanid);
- if (c == NULL)
+
+ if ((c = channel_lookup(s->chanid)) == NULL)
fatal("session_exit_message: session %d: no channel %d",
s->self, s->chanid);
debug("session_exit_message: session %d channel %d pid %d",
s->self, s->chanid, s->pid);
if (WIFEXITED(status)) {
- channel_request_start(s->chanid,
- "exit-status", 0);
+ channel_request_start(s->chanid, "exit-status", 0);
packet_put_int(WEXITSTATUS(status));
packet_send();
} else if (WIFSIGNALED(status)) {
- channel_request_start(s->chanid,
- "exit-signal", 0);
+ channel_request_start(s->chanid, "exit-signal", 0);
packet_put_int(WTERMSIG(status));
#ifdef WCOREDUMP
packet_put_char(WCOREDUMP(status));
s->chanid = -1;
}
-static void
+void
session_close(Session *s)
{
debug("session_close: session %d pid %d", s->self, s->pid);
}
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);
+ }
}
}
andersk / openssh.git / blobdiff