bash - shell script working fine on one server but not on another -

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the following script working fine on 1 server on other gives error

#!/bin/bash  processline(){   line="$@" # complete first line complete script path  name_of_file=$(basename "$line" ".php") # seperate path name of file excluding extension ps aux | grep -v grep | grep -q "$line" || ( nohup php -f "$line" > /var/log/iphorex/$name_of_file.log & )  }  file=""  if [ "$1" == "" ];    file="/var/www/iphorex/live/infi_script.txt" else    file="$1"     # make sure file exist , readable    if [ ! -f $file ];     echo "$file : not exists. script terminate now."     exit 1    elif [ ! -r $file ];     echo "$file: can not read. script terminate now."     exit 2    fi fi # read $file using file descriptors # $ifs shell variable. varies version version. known internal file seperator.  # set loop separator end of line backupifs=$ifs #use temp. variable such $ifs can restored later. ifs=$(echo -en "\n") exec 3<&0  exec 0<"$file" while read -r line     # use $line variable process line in processline() function     processline $line done exec 0<&3  # restore $ifs used determine field separators ifs=$bakcupifs exit 0

i trying read file containing path of various scripts , checking whether scripts running , if not running them. file /var/www/iphorex/live/infi_script.txt present. following error on amazon server-

[: 24: unexpected operator infinity.sh: 32: cannot open : no such file

thanks helps in advance.

you should initialize file 

 file=${1:-/var/www/iphorex/live/infi_script.txt}

and skip existence check. if file not exist or not readable, exec 0< fail reasonable error message (there's no point in trying guess error message be, let shell report error.)

i think problem shell on failing server not "==" in equality test. (many implementations of test accept 1 '=', thought older bash had builtin accepted 2 '==' might way off base.) eliminate lines file="" down end of existence check , replace them assignment above, letting shell's standard default mechanism work you.

note if eliminate existence check, you'll want either add 

 set -e

near top of script, or add check on exec: 

 exec 0<"$file" || exit 1

so script not continue if file not usable.


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