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Top Forums UNIX for Beginners Questions & Answers How to have local shell variables in a ksh script seen on remove server in SSH block? Post 303036281 by MadeInGermany on Friday 21st of June 2019 10:58:34 AM
Old 06-21-2019
I think that code in unquoted here documents is problematic: too many levels of quoting.
In zsh you can chain two (or more) redirections
Code:
#!/bin/zsh
filepath=/xxx/yyy/zzz/
filename=xyz

ssh uid@hostname << EOT1 << 'ENDSSH'
filepath=$filepath
filename=$filename
EOT1
.
.
if [[ -e ${filepath}${filename} ]]; then
....
....
fi

ENDSSH

The first part EOT1 is unquoted and assigns the local variables to the remote variables.
Instead of directly feeding the login shell (where ssh might complain that a tty is missing) it is more correct to run an explicit /bin/sh (or /bin/bash)
Code:
ssh uid@hostname /bin/sh -s << EOT1 << 'ENDSSH'

Having this, with any standard shell you can pass the local variables as parameters
Code:
filepath=/xxx/yyy/zzz/
filename=xyz

ssh uid@hostname /bin/sh -s $filepath $filename << 'ENDSSH'
filepath=$1
filename=$2
.
.
if [[ -e ${filepath}${filename} ]]; then
....
....
fi

ENDSSH

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. SunOS 5.10 30 Aug 2004 getusershell(3C)
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