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1.3.5: write(2) system call fails with 0 length


Folks,

I upgraded 1.3.3 to 1.3.5 over the weekend.  Yesterday (Monday, 11/12) I 
could no longer get a kerberos ticket using the MIT kinit.  Kinit returned 
an "internal error".  After some investigation, I find that the problem is 
with the write(2) system call when the length of the write is 0.  Here is a 
test program....

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>

main()
{
         int fd, ret;
         char * buf[4];
         buf[0] = buf[1] = buf[2] = buf[3] = '0';
         fd = open( "foo", O_RDWR );
         ret = write( fd, (char *) buf, 4);
         ret = write( fd, (char *)0, 0);
         printf("ret=%d, errno=%d\n", ret, errno);
         close( fd );
}

Under 1.3.5, this program yields
$ a.exe
ret=-1, errno=14

Under 1.3.3, this program works (ret=0, errno=0).

Thanks
Randy Reitz

Cygnus Win95/NT Configuration Diagnostics
Current System Time: Tue Nov 13 21:49:55 2001

Win2000 Ver 5.0 build 2195 Service Pack 2

Path:	c:\mysql\bin
	C:\cygwin\usr\local\bin
	C:\cygwin\bin
	C:\cygwin\bin
	g:\oracle\ora81\bin
	c:\Program Files\Oracle\jre\1.1.7\bin
	C:\cygwin\bin
	c:\WINNT\system32
	c:\WINNT
	c:\WINNT\System32\Wbem
	c:\Program Files\Resource Pro Kit\
	.

SysDir: C:\WINNT\System32
WinDir: C:\WINNT

HOME = `C:\cygwin\home\rreitz'
MAKE_MODE = `unix'
PWD = `/home/rreitz'
USER = `rreitz'

ALLUSERSPROFILE = `C:\Documents and Settings\All Users'
APPDATA = `C:\Documents and Settings\rreitz\Application Data'
CLASSPATH = `C:\Program Files\PhotoDeluxe BE 1.1\AdobeConnectables;'
COMMONPROGRAMFILES = `C:\Program Files\Common Files'
COMPUTERNAME = `DIRT'
COMSPEC = `C:\WINNT\system32\cmd.exe'
CORPATH = `C:\WINNT\Microsoft.NET\Framework\v1.0.2204\'
DISKEEPERICON = `C:\Program Files\Executive Software\DiskeeperWorkstation\'
HOMEDRIVE = `C:'
HOMEPATH = `\'
HOSTNAME = `DIRT'
HOSTTYPE = `i686'
LIB = `C:\Program Files\Microsoft.Net\FrameworkSDK\Lib'
LOGONSERVER = `\\DIRT'
MACHTYPE = `i686-pc-cygwin'
NUMBER_OF_PROCESSORS = `1'
OLDPWD = `/usr/bin'
OS2LIBPATH = `C:\WINNT\system32\os2\dll;'
OS = `Windows_NT'
OSTYPE = `cygwin'
PATHEXT = `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH'
PROCESSOR_ARCHITECTURE = `x86'
PROCESSOR_IDENTIFIER = `x86 Family 6 Model 4 Stepping 2, AuthenticAMD'
PROCESSOR_LEVEL = `6'
PROCESSOR_REVISION = `0402'
PROGRAMFILES = `C:\Program Files'
PROMPT = `$P$G'
PS1 = `\[\033]0;\w\007
\033[32m\]\u@\h \[\033[33m\w\033[0m\]
$ '
ROOTDIR = `c:'
SHELL = `c:/mksnt/sh.exe'
SHLVL = `1'
SYSTEMDRIVE = `C:'
SYSTEMROOT = `C:\WINNT'
TEMP = `c:\DOCUME~1\rreitz\LOCALS~1\Temp'
TERM = `cygwin'
USERDOMAIN = `DIRT'
USERNAME = `rreitz'
USERPROFILE = `C:\Documents and Settings\rreitz'
WINDIR = `C:\WINNT'
_ = `/usr/bin/cygcheck'

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 = 0x00000022
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/c
  (default) = `c:'
  flags = 0x00000000
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/k
  (default) = `k:'
  flags = 0x00000000
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
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\mounts\00
  (default) = `\\.\tape1:'
  unix = `/dev/st1'
  fbinary = 0x00000000
  fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\01
  (default) = `\\.\tape0:'
  unix = `/dev/st0'
  fbinary = 0x00000000
  fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\02
  (default) = `\\.\b:'
  unix = `/dev/fd1'
  fbinary = 0x00000000
  fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\03
  (default) = `\\.\a:'
  unix = `/dev/fd0'
  fbinary = 0x00000000
  fsilent = 0x00000001
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\04
  (default) = `C:'
  unix = `/'
  fbinary = 0x00000000
  fsilent = 0x00000000
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MenuOrder\Start Menu\Programs\Cygnus Solutions
  (default) = (unsupported type)
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/
  (default) = `C:/cygwin'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/bin
  (default) = `C:/cygwin/bin'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/lib
  (default) = `C:/cygwin/lib'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Program Options
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\mounts\00
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\01
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\02
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\03
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\04
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\05
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\06
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\07
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\08
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\09
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0D
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0E
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0F
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\10
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\11
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\12
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\13
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\14
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\15
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\16
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\17
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\18
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\19
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1D

a:  fd           N/A    N/A                    
c:  hd  NTFS    9538Mb  55% CP CS UN PA FC     Win2K
d:  cd           N/A    N/A                    
e:  cd  CDFS     643Mb 100%    CS              TN0106
f:  hd  FAT32   1029Mb  17% CP    UN           
g:  hd  NTFS    9993Mb  18% CP CS UN PA FC     Data Volume
h:  net NTFS   18648Mb  50% CP CS    PA        .
k:  net NTFS   29329Mb  59% CP CS UN PA FC     your_way

c:             /c         user    textmode
k:             /k         user    textmode
.              /cygdrive  user    binmode,noumount
C:/cygwin      /          system  binmode
C:/cygwin/bin  /usr/bin   system  binmode
C:/cygwin/lib  /usr/lib   system  binmode

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

   56k 2000/12/03 C:\cygwin\bin\cygbz21.0.dll - os=4.0 img=1.0 sys=4.0
                  "cygbz21.0.dll" v0.0 ts=2000/11/20 17:53
   45k 2001/04/25 C:\cygwin\bin\cygform5.dll - os=4.0 img=1.0 sys=4.0
                  "cygform5.dll" v0.0 ts=2001/4/25 0:28
   34k 2001/09/30 C:\cygwin\bin\cygform6.dll - os=4.0 img=1.0 sys=4.0
                  "cygform6.dll" v0.0 ts=2001/9/29 21:43
   18k 2000/10/23 C:\cygwin\bin\cyggdbm.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm.dll" v0.0 ts=2000/10/22 21:26
   17k 2001/06/28 C:\cygwin\bin\cyghistory4.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory4.dll" v0.0 ts=2001/1/6 22:34
   21k 2001/06/28 C:\cygwin\bin\cyghistory5.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory5.dll" v0.0 ts=2001/6/27 21:27
   21k 2001/06/20 C:\cygwin\bin\cygintl.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl.dll" v0.0 ts=2001/6/20 12:09
   81k 2001/10/20 C:\cygwin\bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitcl30.dll" v0.0 ts=2001/10/19 19:25
   35k 2001/10/20 C:\cygwin\bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitk30.dll" v0.0 ts=2001/10/19 19:25
   45k 2001/07/04 C:\cygwin\bin\cygjbig1.dll - os=4.0 img=1.0 sys=4.0
                  "cygjbig1.dll" v0.0 ts=2001/7/3 22:25
  119k 2001/06/06 C:\cygwin\bin\cygjpeg6b.dll - os=4.0 img=1.0 sys=4.0
                  "cygjpeg6b.dll" v0.0 ts=2001/6/5 23:27
   26k 2001/04/25 C:\cygwin\bin\cygmenu5.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu5.dll" v0.0 ts=2001/4/25 0:27
   19k 2001/09/30 C:\cygwin\bin\cygmenu6.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu6.dll" v0.0 ts=2001/9/29 21:43
  156k 2001/04/25 C:\cygwin\bin\cygncurses++5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++5.dll" v0.0 ts=2001/4/25 0:29
  175k 2001/09/30 C:\cygwin\bin\cygncurses++6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++6.dll" v0.0 ts=2001/9/29 21:45
  226k 2001/04/25 C:\cygwin\bin\cygncurses5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses5.dll" v0.0 ts=2001/4/25 0:17
  201k 2001/09/30 C:\cygwin\bin\cygncurses6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses6.dll" v0.0 ts=2001/9/29 21:42
   15k 2001/04/25 C:\cygwin\bin\cygpanel5.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel5.dll" v0.0 ts=2001/4/25 0:27
   12k 2001/09/30 C:\cygwin\bin\cygpanel6.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel6.dll" v0.0 ts=2001/9/29 21:43
  163k 2001/05/06 C:\cygwin\bin\cygpng2.dll - os=4.0 img=1.0 sys=4.0
                  "cygpng2.dll" v0.0 ts=2001/5/5 23:05
  108k 2001/06/28 C:\cygwin\bin\cygreadline4.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline4.dll" v0.0 ts=2001/1/6 22:34
  135k 2001/06/28 C:\cygwin\bin\cygreadline5.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline5.dll" v0.0 ts=2001/6/27 21:27
  390k 2001/10/20 C:\cygwin\bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtcl80.dll" v0.0 ts=2001/10/19 19:24
    5k 2001/10/20 C:\cygwin\bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0
   10k 2001/10/20 C:\cygwin\bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtclreg80.dll" v0.0 ts=2001/10/19 19:24
  245k 2001/06/12 C:\cygwin\bin\cygtiff3.dll - os=4.0 img=1.0 sys=4.0
                  "cygtiff3.dll" v0.0 ts=2001/6/12 12:25
  623k 2001/10/20 C:\cygwin\bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtk80.dll" v0.0 ts=2001/10/19 19:25
   41k 2001/07/04 C:\cygwin\bin\cygXpm-noX4.dll - os=4.0 img=1.0 sys=4.0
                  "cygXpm-noX4.dll" v0.0 ts=2001/7/3 20:21
   45k 2001/07/04 C:\cygwin\bin\cygXpm-X4.dll - os=4.0 img=1.0 sys=4.0
                  "cygXpm-X4.dll" v0.0 ts=2000/11/19 20:45
   49k 2001/02/03 C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
                  "cygz.dll" v0.0 ts=2001/2/3 14:35
  714k 2001/11/12 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
                  "cygwin1.dll" v0.0 ts=2001/11/11 18:01
    Cygwin DLL version info:
        DLL version: 1.3.5
        DLL epoch: 19
        DLL bad signal mask: 19005
        DLL old termios: 5
        DLL malloc env: 28
        API major: 0
        API minor: 47
        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
        Cygdrive flags: cygdrive flags
        Cygdrive prefix: cygdrive prefix
        Cygdrive default prefix: 
        Build date: Sun Nov 11 19:01:54 EST 2001
        Shared id: cygwin1S3

Cygwin Package Information
Last downloaded files to: 
Last downloaded files from: ftp://mirrors.rcn.net/mirrors/sources.redhat.com/cygwin

Package             Version             
ash                 20011018-1          
autoconf            2.52-1              
automake            1.5-1               
bash                2.05-8              
binutils            20011002-1          
bison               1.28-1              
byacc               0.0                 
bzip2               1.0.1-6             
clear               1.0                 
cpio                2.4.2               
cron                3.0.1-5             
crypt               1.0-1               
ctags               5.0.1-1             
cvs                 1.11.0-1            
cygrunsrv           0.94-2              
cygwin              1.3.5-1             
cygwin-src          1.3.5-1             
dejagnu             20010117-1          
diff                0.0                 
expect              20010117-1          
file                3.33-1              
fileutils           4.1-1               
findutils           0.0                 
flex                2.5.4-1             
gawk                3.0.4-1             
gcc                 2.95.3-5            
gdb                 20010428-3          
gdbm                1.8.0-3             
gettext             0.10.38-2           
ghostscript         6.51-1              
gperf               0.0                 
grep                2.4.2-1             
groff               1.16.1-1            
gzip                1.3-1               
inetutils           1.3.2-15            
irc                 20010101-1          
jbigkit             1.2-4               
jpeg                6b-4                
less                358-3               
libncurses5         5.2-1               
libncurses6         5.2-2               
libpng              1.0.11-1            
login               1.4-2               
lynx                2.8.4-1             
m4                  0.0                 
make                3.79.1-4            
man                 1.5g-2              
mingw               20010917-1          
mingw-runtime       1.1-1               
mt                  1.9.2-1             
mutt                1.2.5i-5            
ncftp               3.0.2-2             
ncurses             5.2-7               
newlib-man          20001118-1          
opengl              1.1.0-5             
openssh             3.0p1-1             
openssl             0.9.6b-1            
patch               2.5-2               
pcre                3.4-2               
perl                5.6.1-1             
popt                1.6.1-1             
postgresql          7.1.3-1             
python              2.1.1-2             
readline            4.2-3               
regex               4.4                 
rsync               2.4.6-2             
rxvt                2.7.2-6             
sed                 3.02-1              
sh-utils            2.0-2               
squid               2.4-STABLE20010508  
ssmtp               2.38.7-3            
tar                 1.13.19-1           
tcltk               20001125-1          
tcsh                6.10.00-3           
termcap             20010825-1          
terminfo            5.2-1               
tetex-beta          20001218-1          
texinfo             4.0-4               
textutils           2.0.16-1            
tiff                3.5.6beta-2         
time                1.7-1               
unzip               5.41-1              
vim                 6.0.93-1            
w32api              1.1-1               
wget                1.7-1               
which               1.4                 
xpm                 4.0.0-2             
xpm-nox             4.1.0-1             
zip                 2.3-1               
zlib                1.1.3-6             

Use -h to see help about each section

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