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Full Discussion: SEnding a process to backgorund (&) in here document
Top Forums Shell Programming and Scripting SEnding a process to backgorund (&) in here document Post 302789265 by acelau on Wednesday 3rd of April 2013 11:43:58 AM
Old 04-03-2013
Thanks for your reply.

Actually this is what i am doing.

Code:
#!/bin/ksh
FILE="a.pipe"
DS="DS1"
TIMESTAMP="TS"

ssh root@192.168.0.112 'ksh' <<ENDSSH
  # commands to run on remote host

for i in {1..8}
do
if [[ ! -e $DS\_$TIMESTAMP\_\$i.pipe ]]
then
mkfifo $DS\_$TIMESTAMP\_\$i.pipe
fi

gzip -c \< $DS\_$TIMESTAMP\_\$i.pipe \> $DS$TIMESTAMP\$i.gz &

done

ENDSSH

I am trying to trigger this script to a remote server to setup 8 pipe for 'on the fly' compression. I'm always getting

Code:
[root@twslinux1 ~]# ./a.sh
gzip: <: No such file or directory                                                                                           àD\QDS1_TS_1.pipegzip: >: No such file or directory
gzip: DS1TS1.gz: No such file or directory
gzip: &: No such file or directory
gzip: <: No such file or directory                                                                                           åD\QDS1_TS_2.pipegzip: >: No such file or directory
gzip: DS1TS2.gz: No such file or directory
gzip: &: No such file or directory
gzip: <: No such file or directory                                                                                           êD\QDS1_TS_3.pipegzip: >: No such file or directory
gzip: DS1TS3.gz: No such file or directory
gzip: &: No such file or directory
gzip: <: No such file or directory                                                                                           9J\QDS1_TS_4.pipegzip: >: No such file or directory
gzip: DS1TS4.gz: No such file or directory
gzip: &: No such file or directory
gzip: <: No such file or directory                                                                                           9J\QDS1_TS_5.pipegzip: >: No such file or directory
gzip: DS1TS5.gz: No such file or directory
gzip: &: No such file or directory
gzip: <: No such file or directory                                                                                           9J\QDS1_TS_6.pipegzip: >: No such file or directory
gzip: DS1TS6.gz: No such file or directory
gzip: &: No such file or directory                                                                                           9J\QDS1_TS_7.pipegzip: <: No such file or directory
gzip: >: No such file or directory
gzip: DS1TS7.gz: No such file or directory
gzip: &: No such file or directory                                                                                           9J\QDS1_TS_8.pipegzip: <: No such file or directory
gzip: >: No such file or directory
gzip: DS1TS8.gz: No such file or directory
gzip: &: No such file or directory
[root@twslinux1 ~]# vi a.sh
[root@twslinux1 ~]# ./a.sh                                                                                                   àD\QDS1_TS_1.pipegzip: <: No such file or directory
gzip: >: No such file or directory
gzip: DS1TS1.gz: No such file or directory

 

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LEARN ABOUT LINUX

let

let(1)                                                             User Commands                                                            let(1)

NAME

       let - shell built-in function to evaluate one or more arithmetic expressions

SYNOPSIS

   ksh
       let arg...

DESCRIPTION

   ksh
       Each arg is a separate "arithmetic expression" to be evaluated.

EXIT STATUS

       The following exit values are returned:

       0        The value of the last expression is non-zero.

       1        The value of the last expression is zero.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), set(1), typeset(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                             let(1)
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