B20.1: It takes hitting RET key twice to make select() recognize input from stdin

Fri May 21 07:38:00 GMT 1999

Hi,
Under cygwin b20.1, select() does not correctly detect input from stdin. That is,
if I type a character and hit RET key once, select() returns 0 as the number of
bits set in the bit masks. If I hit the RET key the second time, select()
correctly returns 1.
To reproduce the problem, just compile the attached test case and run it as:
 gcc -g -o select_test.exe select_test.c
 ./select_test.exe
This same program, when compiled and run on Solaris 2.5.1, behaves correctly. That
is, select() correctly returns 1 when I type a character and hit RET key once. I
don't have to hit RET key twice.
Here is the output from cygcheck -s -v -r under my cygwin environment:
=====
Cygnus Win95/NT Configuration Diagnostics
Current System Time: Fri May 21 18:29:02 1999
WinNT Ver 4.0 build 1381 Service Pack 3
Path: /cygnus/cygwin-b20/H-I586-cygwin32/bin
 /fsf/mule/bin
 /Oracle/ORANT/bin
 /ACTIVE~1/Perl/bin
 /UTILS
 /WINNT/system32
 /WINNT
 /Sun/Jdk117b/bin
 /Sun/Jsdk20/bin
 /bea/m3/bin
 /IMNnq_NT
 /MICROS~1/MICROS~1/Office
 /Program Files/Microsoft Visual Studio/Common/MSDev98/Bin
 /Program Files/Microsoft Visual Studio/Common/Tools
 /Program Files/Microsoft Visual Studio/VC98/bin
SysDir: C:\WINNT\System32
WinDir: C:\WINNT
MAKE_MODE = `UNIX'
PWD = `/Workshop/cygwin'
!EXITCODE = `00000000'
!C: = `C:\Cygnus\cygwin-b20'
CLASSPATH = `C:\Oracle\JDBC\lib\classes111.zip;.'
COMPUTERNAME = `BEA'
COMSPEC = `C:\WINNT\system32\cmd.exe'
EUID = `500'
HOMEDRIVE = `C:'
HOMEPATH = `\users\default'
HOSTNAME = `bea'
HOSTTYPE = `i586'
IBMVACLASSPATH = `c:\ibm\vjava\eab\runtime20;'
IMNINSTSRV = `c:\IMNnq_NT'
IMQCONFIGCL = `c:\IMNnq_NT\instance\DBCSHELP'
IMQCONFIGSRV = `c:\IMNnq_NT\instance'
INCLUDE = `C:\Program Files\Microsoft Visual Studio\VC98\include;c:\program
files\devstudio\vc\include;c:\program files\devstudio\vc\atl\include;c:\program files\devstudio\vc\mfc\include;%include%'
LIB = `C:\Program Files\Microsoft Visual Studio\VC98\lib;c:\program
files\devstudio\vc\lib;c:\program files\devstudio\vc\mfc\lib;%lib%'
LOGONSERVER = `\\BEA'
MACHTYPE = `i586-pc-cygwin32'
MSDEVDIR = `C:\Program Files\Microsoft Visual Studio\Common\MSDev98;C:\Program Files\DevStudio\SharedIDE'
NETSCAPE = `C:\Netscape\SuiteSpot'
NUMBER_OF_PROCESSORS = `1'
OS2LIBPATH = `C:\WINNT\system32\os2\dll;'
OS = `Windows_NT'
OSTYPE = `cygwin32'
PATHEXT = `.COM;.EXE;.BAT;.CMD'
PROCESSOR_ARCHITECTURE = `x86'
PROCESSOR_IDENTIFIER = `x86 Family 5 Model 4 Stepping 4, GenuineIntel'
PROCESSOR_LEVEL = `5'
PROCESSOR_REVISION = `0404'
PROMPT = `$P$G'
PS1 = `\s_\$ '
SHELL = `/bin/sh'
SHLVL = `1'
SYSTEMDRIVE = `C:'
SYSTEMROOT = `C:\WINNT'
TEMP = `C:\TEMP'
TERM = `cygwin'
TMP = `C:\TEMP'
TRANSLATE = `SJIS'
TUXDIR = `c:\bea\m3'
UID = `500'
USERDOMAIN = `BEA'
USERNAME = `tuxedo'
USERPROFILE = `C:\WINNT\Profiles\tuxedo'
WINDIR = `C:\WINNT'
_ = `/cygnus/cygwin-b20/H-I586-cygwin32/bin/cygcheck'
HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts00円
 (default) = `\\.\tape1:'
 unix = `/dev/st1'
 fbinary = 0x00000000
 fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts01円
 (default) = `\\.\tape0:'
 unix = `/dev/st0'
 fbinary = 0x00000000
 fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts02円
 (default) = `\\.\b:'
 unix = `/dev/fd1'
 fbinary = 0x00000000
 fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts03円
 (default) = `\\.\a:'
 unix = `/dev/fd0'
 fbinary = 0x00000000
 fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts04円
 (default) = `C:'
 unix = `/'
 fbinary = 0x00000000
 fsilent = 0x00000000
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin B20
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin B20\B20.1
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts00円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts01円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts02円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts03円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts04円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts05円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts06円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts07円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts08円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts09円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円D
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円E
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts0円F
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts10円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts11円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts12円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts13円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts14円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts15円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts16円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts17円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts18円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts19円
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts1円A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts1円B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts1円C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts1円D
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\GNUPro
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\GNUPro\i586-cygwin32
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\GNUPro\i586-cygwin32\i586-cygwin32
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\GNUPro\i586-cygwin32\i586-cygwin32\cygwin-B20.1
 (default) = `c:\cygnus\cygwin-b20'
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cygnus
Cygwin B20
 (default) = `C:\WINNT\IsUninst.exe -fc:\cygnus\cygwin-b20\Uninst.isu'
 DisplayName = `Cygwin B20'
a:\ fd N/A N/A 
c:\ hd NTFS 2015Mb 80% CP CS UN PA FC 
d:\ cd N/A N/A 
C: / native text!=binary
\\.\a: /dev/fd0 native text!=binary
\\.\b: /dev/fd1 native text!=binary
\\.\tape0: /dev/st0 native text!=binary
\\.\tape1: /dev/st1 native text!=binary
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\bash.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cat.exe
Not Found: cpp (good!)
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\find.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\gcc.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\gdb.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\ld.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\ls.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\make.exe
Found: C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\sh.exe
 371k 1998年12月01日 C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cygtcl80.dll - os=4.0
img=1.0 sys=4.0
 "cygtcl80.dll" v0.0 ts=1998年12月1日 17:25
 5k 1998年12月01日 C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cygtclpip80.dll -
os=4.0 img=1.0 sys=4.0
 10k 1998年12月01日 C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cygtclreg80.dll -
os=4.0 img=1.0 sys=4.0
 "cygtclreg80.dll" v0.0 ts=1998年12月1日 17:25
 600k 1998年12月01日 C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cygtk80.dll - os=4.0
img=1.0 sys=4.0
 "cygtk80.dll" v0.0 ts=1998年12月1日 17:28
 446k 1998年12月03日 C:\cygnus\cygwin-b20\H-I586-cygwin32\bin\cygwin1.dll - os=4.0
img=1.0 sys=4.0
 "cygwin1.dll" v0.0 ts=1998年12月4日 13:39
Use -h to see help about each section
=====
-- 
Kazuhisa Ichikawa
Kawasaki Japan
ki@home.email.ne.jp