Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT sources DOT redhat DOT com Delivered-To: mailing list cygwin AT sources DOT redhat DOT com Message-ID: <39B5B1FB.14BDFF0D@nortelnetworks.com> Date: Wed, 06 Sep 2000 12:54:51 +1000 X-Sybari-Space: 00000000 00000000 00000000 From: "Benjamin Low" X-Mailer: Mozilla 4.7 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: cygwin AT sources DOT redhat DOT com Subject: i/o STOP + CONT (bash?) problem References: <968167382 DOT 14182 DOT ezmlm AT sources DOT redhat DOT com> Content-Type: multipart/mixed; boundary="------------2736042AFE13A9D15DF652B4" X-Orig: --------------2736042AFE13A9D15DF652B4 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Does anyone have trouble with START and STOP signals w/ cygwin? (cygwin 1.1.3 distribution, on a W2k box) - in particular with bash? Details: If I issue a Ctrl-S (STOP) directly to bash within a terminal (W32 rxvt or X11R6 xterm), it's game over - there seems to be nothing I can do to restore output, even signalling the process externally doesn't help. If I send a STOP signal from another process (i.e. kill -STOP , not via Ctrl-S) and then CONT, it works as expected for W32 rxvt's but not for xterms (output pauses whilst STOPped, then CONTinues). Note that the process continues to run, just all tty output halts. When I kill the terminal window via the Windows task manager, it notes "the program is not responding". Screen updates and such (even the window title bar) do not occur. The problem occurs both under the native windows rxvt terminal emulator (v2.7.2, from http://www.io.com/~bub/rxvt.html), plus xterm from the X11R6 4.0 cygwin binary package, running under Exceed. I've not fiddled with my stty config. For example (reproducible exactly as shown): within a W32 rxvt (PID of bash shell is 19071): 19071 $ rxvt -e bash & [19574] (PID of new rxvt is 19574, bash is 19575) 19575 $ while [ 1 ]; do echo $RANDOM; sleep 1; done 31196 6885 ... (and so on, with bash starting a new sleep process every second) (from my original shell:) 19071 $ kill -STOP 19574 (i.e. STOP rxvt) (output stops, my original shell returns [1]+ Stopped rxvt -e bash) 19071 $ kill -CONT 19574 (i.e. CONT rxvt) (output flushes and continues) 19071 $ kill -STOP 19575 (i.e. STOP bash) (output stops) 19071 $ kill -CONT 19575 (i.e. CONT bash) (output flushes and continues) So, signalling externally seems to work fine for the W32 rxvt, both for the terminal and shell. If I try the above with an xterm, the signalling of the xterm works, but signalling bash causes a lockup (i.e. the kill -CONT does not restore output). If I send STOP directly to bash via ctrl-S (in either a W32 rxvt or xterm), it locks up forevermore. The processes seem to continue to run for a while, in the above example the while loop continues to fire up new sleep processes every second, and presumably the shell continues to echo output (until it fills the output buffer). After a ctrl-S, ps -l shows an "I" next to the PID of the rxvt containing the mute bash process: $ ps -l ... I 21959 21376 21959 1416 11707 12 12:39:38 /usr/local/bin/rxvt.exe 21960 21959 21960 2768 11707 0 12:39:38 /usr/bin/bash.exe After about a minute: $ ps -l ... I 21959 21376 21959 1416 11707 12 12:39:38 /usr/local/bin/rxvt.exe O 21960 21959 21960 2768 11707 0 12:39:38 /usr/bin/bash.exe (and no new sleep processes are started - i.e. the shell has halted, I assume the O means "waiting for Output"?). On a possibly related note, INTR (ctrl-C) sometimes stops working in bash. For example, right now I have two W32 rxvt's up running bash, one is still accepting ctrl-C to cancel the current input line, the other is ignoring me. Other input seems to work, including ctrl-U (kill line), ctrl-H (erase). I have played with strace but can't see how to follow forks, plus it doesn't work with the native W32 rxvt, so it's a bit hard to see what's going on. Does strace have a -p (attach to PID) or -f (follow forks) option? I've searched the mail archives without seeing any similar problem. Please find my cygcheck output attached. > From: Chris Faylor ... > 1) If it isn't clear, cygwin is currently in use by thousands of people. > AFAIK, none of them have reported problems where "echo seems to be > turned off". That means that we need a lot more details. The first > thing would be the output of 'cygcheck -r -s -v'. -- Benjamin D Low bdlow AT nortelnetworks DOT com Nortel Networks Technology Centre +61 2 4254 7473 Wollongong NSW Australia ESN 639 7473 --------------2736042AFE13A9D15DF652B4 Content-Type: text/plain; charset=us-ascii; name="cygcheck" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="cygcheck" Cygnus Win95/NT Configuration Diagnostics Current System Time: Wed Sep 6 12:23:32 2000 WinNT Ver 5.0 build 2195 Path: /home/bdlow/bin /usr/local/bin /usr/bin /usr/bin /c/WINNT/system32 /c/WINNT /c/WINNT/System32/Wbem /usr/bin /usr/X11R6/bin SysDir: C:\WINNT\System32 WinDir: C:\WINNT CYGWIN = `ntea ntsec' HOME = `/home/bdlow' MAKE_MODE = `unix' PWD = `/home/bdlow' USER = `bdlow' !C: = `C:\cygwin\bat' !D: = `D:\Nortel\Ben Low' ALLUSERSPROFILE = `C:\Documents and Settings\All Users' APPDATA = `C:\Documents and Settings\lowb\Application Data' CLASSPATH = `C:\Program Files\Exceed.nt' COLORFGBG = `0;default;15' COLORTERM = `rxvt-xpm' COMMONPROGRAMFILES = `C:\Program Files\Common Files' COMPUTERNAME = `LOWB-1' COMSPEC = `C:\WINNT\system32\cmd.exe' DEVMGR_SHOW_NONPRESENT_DEVICES = `1' DISPLAY = `localhost:0' EDITOR = `vi' ENV = `/home/bdlow/.bash_profile' HOMEDRIVE = `C:' HOMEPATH = `\' HOSTNAME = `LOWB-1' HOSTTYPE = `i586' IGNOREEOF = `2' LC_ALL = `en_AU' LESS = `-Plines %lt-%lb (%pt-%pb\% of bytes) %f$' LOGONSERVER = `\\ZNOTC002' MACHTYPE = `i586-pc-cygwin' MANPATH = `:' MXBIN = `C:\program files\Formida\Fire3\mx\i386\win32\bin' MXHOME = `C:\program files\Formida\Fire3' NNTPSERVER = `wolnews' NUMBER_OF_PROCESSORS = `1' OS2LIBPATH = `C:\WINNT\system32\os2\dll;' OS = `Windows_NT' OSTYPE = `cygwin' PAGER = `less' PATHEXT = `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH' PRINTER = `hp' PROCESSOR_ARCHITECTURE = `x86' PROCESSOR_IDENTIFIER = `x86 Family 6 Model 7 Stepping 3, GenuineIntel' PROCESSOR_LEVEL = `6' PROCESSOR_REVISION = `0703' PROGRAMFILES = `C:\Program Files' PROMPT = `$P$G' PROMPT_COMMAND = `echo -ne "\033]0;${HOSTNAME}:${PWD}\007"' RSYNC_RSH = `ssh' SHELL = `/bin/bash' SHLVL = `1' SYSTEMDRIVE = `C:' SYSTEMROOT = `C:\WINNT' TEMP = `/tmp' TERM = `xterm' TMP = `/tmp' TMPDIR = `/tmp' USERDOMAIN = `ASIAPACIFIC' USERNAME = `bdlow' USERPROFILE = `C:\Documents and Settings\lowb' WINDIR = `C:\WINNT' WINDOWID = `168100008' _ = `/usr/bin/cygcheck' ftp_proxy = `http://zwolh008:8080/' http_proxy = `http://zwolh008:8080/' TZ = `AUSEST-10AUSEDT-11,M10.5.0/2,M3.5.0/2' HKEY_CURRENT_USER\Software\Cygnus Solutions HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2 (default) = `/cygdrive' cygdrive flags = 0x00000020 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/ (default) = `C:/cygwin' flags = 0x00000002 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/c (default) = `c:' flags = 0x00000000 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/d (default) = `d:' flags = 0x00000000 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/h (default) = `\\zwoln001\bdlow' flags = 0x00000000 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/home/bdlow (default) = `D:\Nortel\Ben Low' flags = 0x00000000 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/tmp (default) = `C:\tmp' flags = 0x00000002 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/usr/bin (default) = `C:/cygwin/bin' flags = 0x00000002 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/usr/lib (default) = `C:/cygwin/lib' flags = 0x00000002 HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MenuOrder\Start Menu\Programs\Cygnus Solutions (default) = (unsupported type) a: fd N/A N/A c: hd NTFS 5592Mb 33% CP CS UN PA FC d: hd NTFS 8997Mb 37% CP CS UN PA FC NORTEL e: cd N/A N/A h: net FAT 82520Mb 98% CP CS UN CIFS.HOMEDIR D:\Nortel\Ben Low /home/bdlow user textmode \\zwoln001\bdlow /h user textmode C:\cygwin\bin /usr/bin user binmode C:\cygwin\lib /usr/lib user binmode C:\cygwin / user binmode C:\tmp /tmp user binmode c: /c user textmode d: /d user textmode Found: C:\cygwin\bin\bash.exe Found: C:\cygwin\bin\cat.exe Found: C:\cygwin\bin\cpp.exe Found: C:\cygwin\bin\find.exe Found: C:\cygwin\bin\gcc.exe Found: C:\cygwin\bin\gdb.exe Found: C:\cygwin\bin\ld.exe Found: C:\cygwin\bin\ls.exe Found: C:\cygwin\bin\make.exe Found: C:\cygwin\bin\sh.exe 83k 2000/06/11 C:\cygwin\bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0 "cygitcl30.dll" v0.0 ts=2000/6/11 13:34 35k 2000/06/11 C:\cygwin\bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0 "cygitk30.dll" v0.0 ts=2000/6/11 13:34 402k 2000/06/11 C:\cygwin\bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0 "cygtcl80.dll" v0.0 ts=2000/6/11 13:30 5k 2000/06/11 C:\cygwin\bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0 10k 2000/06/11 C:\cygwin\bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0 "cygtclreg80.dll" v0.0 ts=2000/6/11 13:30 639k 2000/06/11 C:\cygwin\bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0 "cygtk80.dll" v0.0 ts=2000/6/11 13:34 568k 2000/07/27 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0 "cygwin1.dll" v0.0 ts=2000/7/28 0:59 Cygwin DLL version info: dll major: 1001 dll minor: 3 dll epoch: 19 dll bad signal mask: 19005 dll old termios: 5 api major: 0 api minor: 24 shared data: 3 dll identifier: cygwin1 mount registry: 2 cygnus registry name: Cygnus Solutions cygwin registry name: Cygwin program options name: Program Options cygwin mount registry name: mounts v2 build date: Thu Jul 27 10:59:35 EDT 2000 shared id: cygwin1S3 Use -h to see help about each section --------------2736042AFE13A9D15DF652B4 Content-Type: text/x-vcard; charset=us-ascii; name="bdlow.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Benjamin Low Content-Disposition: attachment; filename="bdlow.vcf" begin:vcard n:Low;Benjamin tel;work:ESN 639 7473, +61 2 4254 7473 x-mozilla-html:FALSE org:Nortel Networks version:2.1 email;internet:bdlow AT nortelnetworks DOT com adr;quoted-printable:;;Nortel Networks Technology Centre=0D=0ANorthfields Avenue;Wollongong;NSW;2500;Australia note;quoted-printable:Not to be confused with benlow AT nortelnetworks DOT com, who works =0D=0Ain Richardson, Texas, U.S.A. fn:Benjamin Low end:vcard --------------2736042AFE13A9D15DF652B4 Content-Type: text/plain; charset=us-ascii -- Want to unsubscribe from this list? 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