can save new $PATH variables

slinkysteve · 10-29-2003, 10:12 AM

hi, I'm having great difficulty in running this shell script in order to set up the $PATH and $LD_LIBRARY_PATH variables.

Quote:

#!/bin/sh
p1=/usr/src/ns-allinone-2.26/bin
p2=/usr/src/ns-allinone-2.26/otcl-1.0a8
p3=/usr/src/ns-allinone-2.26/lib
p4=/usr/src/ns-allinone-2.26/lib/tcl8.3
p5=/usr/src/ns-allinone-2.26/lib/tk8.3

PATH=$PATH:$p1:$p2:$p3:$p4:$p5
export PATH
$PATH

LD_LIBRARY_PATH=$p3:$p4:$p5
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH
$LD_LIBRARY_PATH
ns $1

Its supposed to setup the paths so I can run NS2 Network Simulator but when I try to run it as root (using "su" command) I get the following problems:

Quote:

[root@localhost Downloads]# sh ./run-ns.sh
./run-ns.sh: line 10: export: `/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/src/ns-allinone-2.26/bin:/usr/src/ns-allinone-2.26/otcl-1.0a8:/usr/src/ns-allinone-2.26/lib:/usr/src/ns-allinone-2.26/lib/tcl8.3': not a valid identifier6/lib/tk8.3
./run-ns.sh: line 12: /sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/src/ns-allinone-2.26/bin:/usr/src/ns-allinone-2.26/otcl-1.0a8:/usr/src/ns-allinone-2.26/lib:/usr/src/ns-allinone-2.26/lib/tcl8.3:/usr/src: No such file or directory
: command not found3:
: command not found6:
./run-ns.sh: line 17: /usr/src/ns-allinone-2.26/lib:/usr/src/ns-allinone-2.26/li: No such file or directoryne-2.26/lib/tk8.3
: command not found8:
%

End result being that no $PATHs have been changed. I'm completely new to this setting of PATH variables and the like so I was hoping someone could help me out

I'm running Mandrake 9.1 with GNOME 2.2

Thanks

Steve

ToniT · 10-29-2003, 10:30 AM

Code:

#!/bin/sh
p1=/usr/src/ns-allinone-2.26/bin
p2=/usr/src/ns-allinone-2.26/otcl-1.0a8
p3=/usr/src/ns-allinone-2.26/lib
p4=/usr/src/ns-allinone-2.26/lib/tcl8.3
p5=/usr/src/ns-allinone-2.26/lib/tk8.3

export PATH=$PATH:$p1:$p2:$p3:$p4:$p5
export LD_LIBRARY_PATH=$$p3:$p4:$p5

echo Path is $PATH, Ld.. is $LD_LIBRARY_PATH
ns $1

Works for me. The path settings are not permanent but apply only to the subshell in question (that is, they are forgotten when script returns). If you want to have a script that changes the path of the current session, you have to run it with source command ("source ./thescript" or ". ./thescripit" instead of "./thescript".)