search for: do_exec_no_pty

...llowGroups", + pw->pw_name); return 0; } ga_free(); *** session.c.O Mon Jun 18 13:59:57 2001 --- session.c Mon Jun 18 14:15:29 2001 *************** *** 93,98 **** --- 93,99 ---- void session_close(Session *s); void do_exec_pty(Session *s, const char *command); void do_exec_no_pty(Session *s, const char *command); + void do_exec(Session *s, const char *command); void do_login(Session *s, const char *command); void do_child(Session *s, const char *command); void do_motd(void); *************** *** 270,286 **** command = NULL; packet_integrity_check(plen, 0, t...

...n strncpy () from /usr/lib/libc.so.1 #1 0xff0b61b0 in pam_sm_open_session () from /usr/lib/security/pam_unix.so.1 #2 0xff372b88 in pam_open_session () from /usr/lib/libpam.so.1 #3 0x2cc88 in do_pam_session (username=0x115fb0 "wyodlows", ttyname=0x0) at auth-pam.c:283 #4 0x32360 in do_exec_no_pty (s=0x1108ac, command=0x121950 "ls") at session.c:433 #5 0x32884 in do_exec (s=0x1108ac, command=0x121950 "ls") at session.c:668 #6 0x34008 in session_exec_req (s=0x1108ac) at session.c:1742 #7 0x3417c in session_input_channel_req (id=0, arg=0x0) at session.c:1795 #8 0x3a...

...he server, I'm not able to do scp or "ssh machinename command" in general to any of my Suns! I tracked this down a bit; the problem occurs only when PAM support is enabled. However, if I remove line 430 of session.c, "do_pam_session(s->pw->pw_name, NULL);" inside of do_exec_no_pty, the problem goes away. It looks like the following entry in the Changelog may be responsible: 20010627 - (djm) Reintroduce pam_session call for non-pty sessions. Let me know if you need any additional info to track this down. Thanks, Brent Nelson Director of Computing Dept. of Physics Univ...

...mindrot.org ReportedBy: mak-openssh-bugs at greenhills.co.uk I've encountered a problem similar (or identical to) 967, but in a modern version, and with more details. I found a problem where executing ssh with a command (`ssh host date` would often hang. Debugging sshd I found that do_exec_no_pty() calls do_child() after the fork(), and that then execve()s. That execve doesn't appear to complete, and the parent doesn't appear to return from the fork. Observe: Dec 2 03:23:14 yoda sshd[7463]: debug1: calling fork in do_exec_no_pty Dec 2 03:23:14 yoda sshd[7464]: debug1: permanently...

...ive with that, since there's no way short of reading it directly to find out whether or not it has been updated, and even then, there's a mostly harmless race condition. A separate but slightly related issue that I'm nailing at the same time (as well as an explanation for the change in do_exec_no_pty): It's possible for pam_setcred to print messages that should be considered part of the session, and that would need to be done after the stdio and pty plumbing. Finally, I'm not too thrilled about the use of strlcpy to get the hostname out of lastlog. The ll_host field of lastlog is a fi...

Hello, all- Apparently, under Solaris (I can personally confirm SunOS 5.7 and 5.8), pam_open_session will generate a segfault if PAM_TTY is not set. The obvious symptom of this is that OpenSSH 2.9.9p2 will segfault on any operation that does not request a tty (do_exec_no_pty). Based on a quick google search, this seems to have been encountered by others, though the specific symptoms seem to have changed a bit. (eg http://www.castaglia.org/proftpd/doc/devel-guide/src/modules/mod_pam.c.html contains a reference to this problem -- the first instance of PAM_TTY) I wasn&...

...f81033fec2b80 10237328 socket ... whereas the same child process spawned by the sshd which I'd just built had this ... 0r FIFO 0,6 3093574 pipe So what was responsible for this difference? It turns out that there's some code in session.c (specifically, in the do_exec_no_pty() function) conditionalized with ... #ifdef USE_PIPES [ ... ] #else [ ... ] #endif ... so this might lead one to believe that there would be something in one of the .h files that would govern which of those chunks of code would get used, particularly in light of the fact that defines.h contains...

...---------- My OLD message ---------- Hello, I have just discoverd that ssh -T does not work with servers which have UseLogin option enabled. This happends becouse /bin/login can not work if there is no tty. To correct this, it is necessary to add: options.use_login = 0; at the top of the "do_exec_no_pty" function from the "session.c" file. ---------- My OLD message ---------- Best regards, Krzysztof Oledzki

http://bugzilla.mindrot.org/show_bug.cgi?id=637 Summary: ssh records that the user has logged out even though an sftp session is active Product: Portable OpenSSH Version: 3.6.1p2 Platform: All OS/Version: All Status: NEW Severity: security Priority: P1 Component: ssh AssignedTo:

...f stdin?(this cause ssh to die w/ "You have no controlling tty. Cannot read passphrase.\n", line 69 of readpass.c, I've made it work by calling password = read_passphrase(prompt, 1); instead of password = read_passphrase(prompt, 0); in sshconnect.c line 940 Second, in sshd.c in the do_exec_no_pty function, line 2017 or so: if (dup2(inout[0], 1) < 0) /* stdout. Note: same socket as stdin. */ perror("dup2 stdout") This seems to cause the forked process to segfault, as a result scp doesn't work, nore does using ssh to send a command. What would the fix be for this? PS...

I was testing the Linux port of 2.1.0p2 and noticed that the F-Secure SSH client for Windows 4.0 couldn't successfully connect using its secure file-transfer facility. The server log reported that authentication was successful, then the log left off with a semi-cryptic "subsystem request for sftp" line. After that, nothing. Poking around the source, I found this little routine in

...session.c 2001/09/28 18:17:11 2.9.9.2.0.1 @@ -126,6 +126,9 @@ static void session_pty_cleanup(void *); void session_proctitle(Session *); int session_setup_x11fwd(Session *); void do_exec_pty(Session *, const char *); +#ifdef LOGIN_NEEDS_UTMPX +static void do_pre_login(Session *s); +#endif void do_exec_no_pty(Session *, const char *); void do_exec(Session *, const char *); void do_login(Session *, const char *); @@ -147,6 +150,7 @@ extern int debug_flag; extern u_int utmp_len; extern int startup_pipe; extern void destroy_sensitive_data(void); +extern void record_utmp_only(pid_t, const char *, const...

http://bugzilla.mindrot.org/show_bug.cgi?id=83 djm at mindrot.org changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|fork() fails when there are |PAM limits applied |PAM limits set |incorrectly ------- You are receiving this mail because: ------- You

Hi, I met some difficult in reading ssh/sshd souce code, I want to find out how the command that user input in client is executed on the server. I only found out the process_input function put the command in a buffer,but can not find how it is executed. Could you please help me on that? Thank you very much. B Rgds, Kexin

...was not recognised by the server as a command submission (CRLF).? I have to explicitly press Ctrl-J to submit the command.? Interesting enough, if I fool the unix ssh client by using "ssh username at hostname.com " "" (an empty command) to force the server side to go through the do_exec_no_pty function, I can actually do what I want interactively if I keep the windows cmd.exe around without exiting.? Even the "enter" key and "local echo" is there.? Can anyone tell what is missing for my interactive session?? Ah, I have to back up a bit about what I did for the interac...

Hi. I am running sshd under supervise, using the -e option to capture the logs on stderr. I am trying to do the same for the sftp subsystem, but I have been unable to do so. Using the same -e option to sftp-server simply sends the debug messages to the client's stderr (instead of sshd's stderr) which doesn't help. Is there any way to do this? I am not averse to doing a local

sshd logs the PID of the network child and the user child sshd processes. This patch adds logging the PID of invoked commands for completeness. diff --git a/session.c b/session.c index f3baea2..dd1d0e8 100644 --- a/session.c +++ b/session.c @@ -579,6 +579,7 @@ do_exec_no_pty(Session *s, const char *command) do_child(s, command); /* NOTREACHED */ default: + verbose("command is on pid %ld", (long)pid); break; } @@ -729,6 +730,7 @@ do_exec_pty(Session *s, const char *command) do_child(s, command); /* NOTREACHED */ default: + verbose(&quo...

Hi All, I finally got around to trying to test the 7.7p1 release on the HPE NonStop Platform. 7.6p1 worked just fine - no issues at all. In 7.7p1, when the agent test ran, the following happened (prior tests worked perfectly): run test agent.sh ... Couldn't open logfile /home/git/openssh-portable/regress/ssh.log: Permission denied agent fwd failed (exit code 1) failed simple agent test

...04fb18 in process_output (writeset=0xbfbfed04) at /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/serverloop.c:366 #2 0x8050029 in server_loop (pid=43486, fdin_arg=9, fdout_arg=9, fderr_arg=11) at /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/serverloop.c:563 #3 0x8053b60 in do_exec_no_pty ( command=0x80750c0 "rsync --server --sender -vlgtpr --delete . /home/ghelmer/ ", pw=0xbfbfef80, display=0x806c0a0 "mocha.cs.iastate.edu:10.0", auth_proto=0x806c100 "MIT-MAGIC-COOKIE-1", auth_data=0x8075000 "cdf4b6cb730310be3d51a8abf77303fc")...

...'t be some random value here if session structure has been used before, since s->tty isn't zeroed in session_new(). Thus you may possibly also need to add: s->tty[0] = '\0'; into the session initialisation in session_new(), or maybe set it before the call to do_child() in do_exec_no_pty(). On further thought, perhaps the call to sia_ses_init should be left alone and the call to session_setup_sia() in session.c changed from: session_setup_sia(pw->pw_name, s->tty); to: session_setup_sia(pw->pw_name, s->ttyfd != -1 ? s->tty : NULL); Can someone who...