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Full Discussion: Extracting a users environment variables
Top Forums Shell Programming and Scripting Extracting a users environment variables Post 302098535 by Tornado on Monday 4th of December 2006 08:50:42 PM
Old 12-04-2006
Extracting a users environment variables
Hi Guys,

I want to extract users environment variables via a sh script, and for some reason it is not working.

According to the su man page:
Code:
     Example 3: Executing command with user bin's Environment and
     Permissions

     To execute command with the temporary environment  and  per-
     missions of user bin, type:

     example% su - bin -c "command args"

But this doesn't work for me. What I expect to see is /opt/bb/bbhome , But I get nothing
Code:
# su - bb -c "echo $BBHOME"
Sun Microsystems Inc.   SunOS 5.9       Generic May 2002

Operating System Version 5.9.01



#

I can see the settings but I can't extract just one.
Code:
# su - bb -c env
Sun Microsystems Inc.   SunOS 5.9       Generic May 2002

Operating System Version 5.9.01


PWD=/opt/bb
TZ=Australia/Victoria
HZ=
HOSTNAME=s00071
MACHTYPE=sparc-sun-solaris2.9
MAIL=/var/mail/bb
BBHOST=s00071
LARRDHOME=/opt/bb/larrd
LOGNAME=bb
SHLVL=1
SHELL=/bin/bash
HOSTTYPE=sparc
BBHOME=/opt/bb/bbhome
OSTYPE=solaris2.9
HOME=/opt/bb
TERM=xterm
PATH=/opt/bb/bbhome/bin:/usr/local/bin:/usr/bin:/usr/ucb:/etc:.:/usr/ccs/bin
_=/usr/bin/env

#

I want bbhome to be /opt/bb/bbhome and then use bbhome in a script.
Code:
# bbhome=`su - bb -c "env | grep BBHOME"`
# echo $bbhome
Sun Microsystems Inc. SunOS 5.9 Generic May 2002 Operating System Version 5.9.01 BBHOME=/opt/bb/bbhome
#

So does anyone know why the -c option in su is not working ?
I don't want to write a function just to set a variable, since the -c option should do this.
Tornado
 

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LEARN ABOUT XFREE86

lint

lint(1B)                                             SunOS/BSD Compatibility Package Commands                                             lint(1B)

NAME

       lint - C program verifier

SYNOPSIS

       /usr/ucb/lint [options]

DESCRIPTION

       /usr/ucb/lint  is  the  interface  to  the  BSD  Compatibility  Package  C  program  verifier.   It  is  a  script  that looks for the link
       /usr/ccs/bin/ucblint to the C program verifier. /usr/ccs/bin/ucblint is available only with the SPROcc package, whose default  location  is
       /opt/SUNWspro.  /usr/ucb/lint  is  identical to /usr/ccs/bin/ucblint, except that BSD headers are used and BSD  libraries are linked before
       base libraries.  The /opt/SUNWspro/man/man1/lint.1 man page is available only with the SPROcc package.

OPTIONS

       /usr/ucb/lint accepts the same options as /usr/ccs/bin/ucblint, with the following exceptions:

       -Idir           Search dir for included files whose names do not begin with a slash (/) prior  to  searching  the  usual  directories.  The
                       directories for multiple -I options are searched in the order specified. The preprocessor first searches for #include files
                       in the directory containing sourcefile, and then in directories named with -I options (if any), then  /usr/ucbinclude,  and
                       finally, in /usr/include.

       -Ldir           Add  dir  to  the  list  of  directories  searched  for  libraries  by  /usr/ccs/bin/ucblint.  This  option  is  passed  to
                       /usr/ccs/bin/ld. Directories specified with this option are searched before /usr/ucblib and /usr/lib.

       -Y P, dir       Change the default directory used for finding libraries.

EXIT STATUS

       The following exit values are returned:

       0               Successful completion.

       >0              An error occurred.

FILES

       /usr/lint/bin/ld        link editor

       /usr/lib/libc           C library

       /usr/ucbinclude         BSD Compatibility directory for header files

       /usr/ucblib             BSD Compatibility directory for libraries

       /usr/ucblib/libucb      BSD Compatibility C library

       /usr/lib/libsocket      library containing socket routines

       /usr/lib/libnsl         library containing network functions

       /usr/lib/libelf         library containing routines to process ELF object files

       /usr/lib/libaio         library containing asynchronous I/O routines

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWscpu                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       ld(1), a.out(4), attributes(5)

SunOS 5.10                                                          1 Feb 1995                                                            lint(1B)
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