Configuration Information [Automatically generated, do not change]:
Machine: i586
OS: linux-gnu
Compiler: gcc -I/usr/src/packages/BUILD/bash-3.2
-L/usr/src/packages/BUILD/bash-3.2/../readline-5.2
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i586'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i586-suse-linux-gnu'
-DCONF_VENDOR='suse' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I. -I./include -I./lib -O2 -march=i586 -mtune=i686
-fmessage-length=0 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -g -D_GNU_SOURCE
-DRECYCLES_PIDS -Wall -pipe -g -fPIE -fprofile-use
uname output: Linux starbase 2.6.22.9-0.4-default #1 SMP 2007/10/05 21:32:04
UTC i686 i686 i386 GNU/Linux
Machine Type: i586-suse-linux-gnu
Bash Version: 3.2
Patch Level: 25
Release Status: release
Description:
In the following script i try to open a free file
descriptor for input from a file.
The script should read lines out of a textfile,
output goes to stdout.
This works fine till my last SUSE Linux 10.1 (sorry
I don't know the version of the bash).
But now (opensuseLinux 10.3) the script aborts with
following error message:
./doit: line 29: exec: 3: not found
This is the line where i try to open the file descriptor
for input:
exec ${fd}<$inf
This error happens always with every run.
If you store the script to a file, eg. 'doit',
then you can test it.
Call the script like: ./doit <filename> <startline> <endline>
The parameters have to be legal, because i stripped
all cmdline parsing and errorchecking in this example.
I think it's a bug in this release of the bash.
-------------------START SCRIPT-----------------------------------------------
#!/bin/sh
#
# File: doit
#
# get lines from a file from first till last line.
# par1 = filename
# par2 = first line
# par3 = last line
# Output goes to Stdout
inf=$1 # file to read from
sl=$2 # start line
el=$3 # end line
declare -i fd=3 # type is int
ifs=''
s='' # textline
i=0 # line number
# find the next unused file descriptor
# range 3-9 (0-2 is STD INPUT/OUTPUT/ERROR)
while [ -t ${fd} ] && [ ${fd} -lt 9 ]; do # fd in use
let fd++ # inc fd
done
if ! [ -t ${fd} ]; then # free fd found
ifs=$IFS # save IFS
IFS=''
i=0 # line number
exec ${fd}<$inf # open fd for input
while read -rsu ${fd} s; do # read line
let i++ # inc line number
if [ "$i" -ge $sl ] && [ "$i" -le $el ]; then # if in scope
echo "$s" # output line
fi
done
exec ${fd}>&- # close fd
IFS=$ifs # restore IFS
fi
-------------------END SCRIPT-------------------------------------------------
Repeat-By:
Always in every run.
