Mail Archives: cygwin/2004/09/09/11:20:17
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I have a problem whereby a bash script doesn't wait for foreground commands
to complete. The script in question kicks off a number of background
processes, and processes their results as they complete.
A simplified version which exhibits the problem is attached as scr.sh. The
number of background processes and the number of iterations of the
foreground commands are supplied as parameters, (e.g. "./scr.sh 50 100").
These values, as well as the length of the sleep may need adjustment
depending on a machine's performance, to make sure that the sleeps terminate
squarely within the foreground loop.
When several background processes are specified, their exiting appears to
confuse bash into thinking the foreground commands have exited, and it
carries on and invokes the next command before it should. The results are
unpredictable, but involve various "No such file or directory" errors, as
files are accessed after being deleted, deleted twice in a row, etc. A
typical run is shown in out.txt.
When the script is typed in and run from the command line, no errors occur.
Is there a fix to bash (or the Cygwin dll?) that will cure this problem?
I'm currently using version 1.5.11 on a single processor Windows NT
platform, but have had the failure on all other Cygwin versions I've tried,
and on Windows 2000.
Regards,
Tony Dolton
Fujitsu Services
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Content-Type: application/octet-stream;
name="scr.sh"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment;
filename="scr.sh"
#!/usr/bin/bash
for ((i=3D0; i<$1; i++))
do
sleep 5 &
done
for ((i=3D0; i<$2; i++))
do
echo $i > file
cat file
rm file
done
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Content-Type: text/plain;
name="out.txt"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment;
filename="out.txt"
0
1
2
3
5
5
6
7
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
9
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
11
12
13
cat: file: No such file or directory
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
17
17
19
19
rm: cannot remove `file': No such file or directory
20
21
22
23
24
25
26
27
28
29
30
rm: cannot remove `file': No such file or directory
32
32
33
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35
36
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cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
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76
77
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
79
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89
cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
91
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cat: file: No such file or directory
rm: cannot remove `file': No such file or directory
99
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Content-Type: application/octet-stream;
name="cygcheck.out"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment;
filename="cygcheck.out"
Cygwin Configuration Diagnostics
Current System Time: Thu Sep 09 13:34:33 2004
Windows NT Ver 4.0 Build 1381 Service Pack 6
Path: C:\cygwin\usr\local\bin
C:\cygwin\bin
C:\cygwin\bin
C:\cygwin\usr\X11R6\bin
c:\Perl\bin
c:\WINNT\system32
c:\WINNT
c:\lbin
Output from C:\cygwin\bin\id.exe (nontsec)
UID: 12393(doltontony) GID: 10544(mkgroup-l-d)
10544(mkgroup-l-d)
Output from C:\cygwin\bin\id.exe (ntsec)
UID: 12393(doltontony) GID: 10544(mkgroup-l-d)
0(root) 544(Administrators)
10544(mkgroup-l-d)
SysDir: C:\WINNT\System32
WinDir: C:\WINNT
HOME =3D `c:\'
MAKE_MODE =3D `unix'
PWD =3D `/cygdrive/c/cygwin/home/doltontony'
USER =3D `doltontony'
COMMONDIR =3D `Common'
COMPUTERNAME =3D `DOLTONTONYDEV6'
COMSPEC =3D `C:\WINNT\system32\cmd.exe'
CVS_RSH =3D `/bin/ssh'
DEVTROOT =3D `C:\Rel2Plus\Devt'
HOMEDRIVE =3D `C:'
HOMEPATH =3D `\'
HOSTNAME =3D `doltontonydev6'
INFOPATH =3D `/usr/local/info:/usr/info:/usr/share/info:/usr/autotool/devel=
/info:/usr/autotool/stable/info:'
LOGONSERVER =3D `\\UKD001'
MANPATH =3D `/usr/local/man:/usr/man:/usr/share/man:/usr/autotool/devel/man=
:'
NUMBER_OF_PROCESSORS =3D `1'
OLDPWD =3D `/cygdrive/c/cygwin/home'
OS2LIBPATH =3D `C:\WINNT\system32\os2\dll;'
OS =3D `Windows_NT'
PATHEXT =3D `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH'
PRINTER =3D `\\BRA01PRINT\G74_01'
PROCESSOR_ARCHITECTURE =3D `x86'
PROCESSOR_IDENTIFIER =3D `x86 Family 6 Model 5 Stepping 2, GenuineIntel'
PROCESSOR_LEVEL =3D `6'
PROCESSOR_REVISION =3D `0502'
PROMPT =3D `$P$G'
PS1 =3D `\[\033]0;\w\007
\033[32m\]\u@\h \[\033[33m\w\033[0m\]
$ '
SHLVL =3D `1'
SYSTEMDRIVE =3D `C:'
SYSTEMROOT =3D `C:\WINNT'
TEMP =3D `C:\TEMP'
TERM =3D `cygwin'
TMP =3D `C:\TEMP'
USERDOMAIN =3D `UK'
USERNAME =3D `doltontony'
USERPROFILE =3D `C:\WINNT\Profiles\doltontony'
WINDIR =3D `C:\WINNT'
_ =3D `/usr/bin/cygcheck'
POSIXLY_CORRECT =3D `1'
HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
(default) =3D `/cygdrive'
cygdrive flags =3D 0x00000022
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/
(default) =3D `C:\cygwin'
flags =3D 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/bin
(default) =3D `C:\cygwin/bin'
flags =3D 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/lib
(default) =3D `C:\cygwin/lib'
flags =3D 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Program Options
a: fd N/A N/A=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
c: hd NTFS 6189Mb 37% CP CS UN PA FC=20=20=20=20=20
d: cd N/A N/A=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
e: net NTFS 17422Mb 77% CP CS UN PA FC=20=20=20=20=20
C:\cygwin / system binmode
C:\cygwin/bin /usr/bin system binmode
C:\cygwin/lib /usr/lib system binmode
. /cygdrive system binmode,cygdrive
Found: C:\cygwin\bin\awk.exe
Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\cygwin\bin\cp.exe
Not Found: cpp (good!)
Found: C:\cygwin\bin\find.exe
Not Found: gcc
Not Found: gdb
Found: C:\cygwin\bin\grep.exe
Not Found: ld
Found: C:\cygwin\bin\ls.exe
Not Found: make
Found: C:\cygwin\bin\mv.exe
Found: C:\cygwin\bin\rm.exe
Found: C:\cygwin\bin\sed.exe
Found: C:\cygwin\bin\sh.exe
Found: C:\cygwin\bin\tar.exe
61k 2003/08/09 C:\cygwin\bin\cygbz2-1.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygbz2-1.dll" v0.0 ts=3D2003/8/9 7:35
45k 2001/04/25 C:\cygwin\bin\cygform5.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygform5.dll" v0.0 ts=3D2001/4/25 6:28
35k 2002/01/09 C:\cygwin\bin\cygform6.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygform6.dll" v0.0 ts=3D2002/1/9 6:03
48k 2003/08/09 C:\cygwin\bin\cygform7.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygform7.dll" v0.0 ts=3D2003/8/9 10:25
28k 2003/07/20 C:\cygwin\bin\cyggdbm-3.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cyggdbm-3.dll" v0.0 ts=3D2003/7/20 8:58
30k 2003/08/11 C:\cygwin\bin\cyggdbm-4.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cyggdbm-4.dll" v0.0 ts=3D2003/8/11 3:12
19k 2003/03/22 C:\cygwin\bin\cyggdbm.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cyggdbm.dll" v0.0 ts=3D2002/2/20 3:05
15k 2003/07/20 C:\cygwin\bin\cyggdbm_compat-3.dll - os=3D4.0 img=3D1.0 s=
ys=3D4.0
"cyggdbm_compat-3.dll" v0.0 ts=3D2003/7/20 9:00
15k 2003/08/11 C:\cygwin\bin\cyggdbm_compat-4.dll - os=3D4.0 img=3D1.0 s=
ys=3D4.0
"cyggdbm_compat-4.dll" v0.0 ts=3D2003/8/11 3:13
107k 2004/07/06 C:\cygwin\bin\cyggettextlib-0-14-1.dll - os=3D4.0 img=3D1=
.0 sys=3D4.0
"cyggettextlib-0-14-1.dll" v0.0 ts=3D2004/7/6 18:56
17k 2004/07/06 C:\cygwin\bin\cyggettextpo-0.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cyggettextpo-0.dll" v0.0 ts=3D2004/7/6 18:56
190k 2004/07/06 C:\cygwin\bin\cyggettextsrc-0-14-1.dll - os=3D4.0 img=3D1=
.0 sys=3D4.0
"cyggettextsrc-0-14-1.dll" v0.0 ts=3D2004/7/6 18:56
17k 2001/06/28 C:\cygwin\bin\cyghistory4.dll - os=3D4.0 img=3D1.0 sys=3D=
4.0
"cyghistory4.dll" v0.0 ts=3D2001/1/7 4:34
29k 2003/08/10 C:\cygwin\bin\cyghistory5.dll - os=3D4.0 img=3D1.0 sys=3D=
4.0
"cyghistory5.dll" v0.0 ts=3D2003/8/11 0:16
991k 2004/07/06 C:\cygwin\bin\cygiconv-2.dll - os=3D4.0 img=3D1.0 sys=3D4=
.0
"cygiconv-2.dll" v0.0 ts=3D2004/7/6 19:10
22k 2001/12/13 C:\cygwin\bin\cygintl-1.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygintl-1.dll" v0.0 ts=3D2001/12/13 9:28
37k 2003/08/10 C:\cygwin\bin\cygintl-2.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygintl-2.dll" v0.0 ts=3D2003/8/10 22:50
54k 2004/07/06 C:\cygwin\bin\cygintl-3.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygintl-3.dll" v0.0 ts=3D2004/7/6 18:51
26k 2001/04/25 C:\cygwin\bin\cygmenu5.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygmenu5.dll" v0.0 ts=3D2001/4/25 6:27
20k 2002/01/09 C:\cygwin\bin\cygmenu6.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygmenu6.dll" v0.0 ts=3D2002/1/9 6:03
29k 2003/08/09 C:\cygwin\bin\cygmenu7.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygmenu7.dll" v0.0 ts=3D2003/8/9 10:25
156k 2001/04/25 C:\cygwin\bin\cygncurses++5.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygncurses++5.dll" v0.0 ts=3D2001/4/25 6:29
175k 2002/01/09 C:\cygwin\bin\cygncurses++6.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygncurses++6.dll" v0.0 ts=3D2002/1/9 6:03
226k 2001/04/25 C:\cygwin\bin\cygncurses5.dll - os=3D4.0 img=3D1.0 sys=3D=
4.0
"cygncurses5.dll" v0.0 ts=3D2001/4/25 6:17
202k 2002/01/09 C:\cygwin\bin\cygncurses6.dll - os=3D4.0 img=3D1.0 sys=3D=
4.0
"cygncurses6.dll" v0.0 ts=3D2002/1/9 6:03
224k 2003/08/09 C:\cygwin\bin\cygncurses7.dll - os=3D4.0 img=3D1.0 sys=3D=
4.0
"cygncurses7.dll" v0.0 ts=3D2003/8/9 10:24
15k 2001/04/25 C:\cygwin\bin\cygpanel5.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygpanel5.dll" v0.0 ts=3D2001/4/25 6:27
12k 2002/01/09 C:\cygwin\bin\cygpanel6.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygpanel6.dll" v0.0 ts=3D2002/1/9 6:03
19k 2003/08/09 C:\cygwin\bin\cygpanel7.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygpanel7.dll" v0.0 ts=3D2003/8/9 10:24
62k 2003/12/11 C:\cygwin\bin\cygpcre-0.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygpcre-0.dll" v0.0 ts=3D2003/12/11 17:01
63k 2003/04/11 C:\cygwin\bin\cygpcre.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygpcre.dll" v0.0 ts=3D2003/4/11 9:31
9k 2003/12/11 C:\cygwin\bin\cygpcreposix-0.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygpcreposix-0.dll" v0.0 ts=3D2003/12/11 17:01
61k 2003/04/11 C:\cygwin\bin\cygpcreposix.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygpcreposix.dll" v0.0 ts=3D2003/4/11 9:31
108k 2001/06/28 C:\cygwin\bin\cygreadline4.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygreadline4.dll" v0.0 ts=3D2001/1/7 4:34
148k 2003/08/10 C:\cygwin\bin\cygreadline5.dll - os=3D4.0 img=3D1.0 sys=
=3D4.0
"cygreadline5.dll" v0.0 ts=3D2003/8/11 0:16
61k 2003/12/04 C:\cygwin\bin\cygz.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygz.dll" v0.0 ts=3D2003/12/4 3:03
1111k 2004/09/05 C:\cygwin\bin\cygwin1.dll - os=3D4.0 img=3D1.0 sys=3D4.0
"cygwin1.dll" v0.0 ts=3D2004/9/5 4:17
Cygwin DLL version info:
DLL version: 1.5.11
DLL epoch: 19
DLL bad signal mask: 19005
DLL old termios: 5
DLL malloc env: 28
API major: 0
API minor: 116
Shared data: 4
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:=20
Build date: Sat Sep 4 23:17:09 EDT 2004
Shared id: cygwin1S4
Cygwin Package Information
Last downloaded files to: C:\TEMP
Last downloaded files from: ftp://sunsite.dk/mirrors/cygwin
Package Version=20=20=20=20=20=20=20=20=20=20=20=20
_update-info-dir 00227-1=20=20=20=20=20=20=20=20=20=20=20=20
ash 20040127-1=20=20=20=20=20=20=20=20=20
base-files 3.0-3=20=20=20=20=20=20=20=20=20=20=20=20=20=20
base-passwd 2.0-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
bash 2.05b-16=20=20=20=20=20=20=20=20=20=20=20
bzip2 1.0.2-5=20=20=20=20=20=20=20=20=20=20=20=20
cygwin 1.5.11-1=20=20=20=20=20=20=20=20=20=20=20
diffutils 2.8.7-1=20=20=20=20=20=20=20=20=20=20=20=20
editrights 1.01-1=20=20=20=20=20=20=20=20=20=20=20=20=20
fileutils 4.1-2=20=20=20=20=20=20=20=20=20=20=20=20=20=20
findutils 4.1.7-4=20=20=20=20=20=20=20=20=20=20=20=20
gawk 3.1.4-3=20=20=20=20=20=20=20=20=20=20=20=20
gdbm 1.8.3-7=20=20=20=20=20=20=20=20=20=20=20=20
grep 2.5-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
groff 1.18.1-2=20=20=20=20=20=20=20=20=20=20=20
gzip 1.3.5-1=20=20=20=20=20=20=20=20=20=20=20=20
less 381-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libbz2_1 1.0.2-5=20=20=20=20=20=20=20=20=20=20=20=20
libgdbm 1.8.0-5=20=20=20=20=20=20=20=20=20=20=20=20
libgdbm-devel 1.8.3-7=20=20=20=20=20=20=20=20=20=20=20=20
libgdbm3 1.8.3-3=20=20=20=20=20=20=20=20=20=20=20=20
libgdbm4 1.8.3-7=20=20=20=20=20=20=20=20=20=20=20=20
libgettextpo0 0.14.1-1=20=20=20=20=20=20=20=20=20=20=20
libiconv2 1.9.2-1=20=20=20=20=20=20=20=20=20=20=20=20
libintl1 0.10.40-1=20=20=20=20=20=20=20=20=20=20
libintl2 0.12.1-3=20=20=20=20=20=20=20=20=20=20=20
libintl3 0.14.1-1=20=20=20=20=20=20=20=20=20=20=20
libncurses5 5.2-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libncurses6 5.2-8=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libncurses7 5.3-4=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libpcre 4.1-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libpcre0 4.5-1=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libreadline4 4.1-2=20=20=20=20=20=20=20=20=20=20=20=20=20=20
libreadline5 4.3-5=20=20=20=20=20=20=20=20=20=20=20=20=20=20
login 1.9-7=20=20=20=20=20=20=20=20=20=20=20=20=20=20
man 1.5k-3=20=20=20=20=20=20=20=20=20=20=20=20=20
mktemp 1.5-3=20=20=20=20=20=20=20=20=20=20=20=20=20=20
ncurses 5.3-4=20=20=20=20=20=20=20=20=20=20=20=20=20=20
readline 4.3-5=20=20=20=20=20=20=20=20=20=20=20=20=20=20
sed 4.1.2-1=20=20=20=20=20=20=20=20=20=20=20=20
sh-utils 2.0.15-4=20=20=20=20=20=20=20=20=20=20=20
tar 1.13.25-5=20=20=20=20=20=20=20=20=20=20
termcap 20021106-2=20=20=20=20=20=20=20=20=20
terminfo 5.3_20030726-1=20=20=20=20=20
texinfo 4.2-4=20=20=20=20=20=20=20=20=20=20=20=20=20=20
textutils 2.0.21-1=20=20=20=20=20=20=20=20=20=20=20
which 1.5-2=20=20=20=20=20=20=20=20=20=20=20=20=20=20
zlib 1.2.1-1=20=20=20=20=20=20=20=20=20=20=20=20
Use -h to see help about each section
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