Very Computer

Folks,
Is there a way to perform tilde substitution on variables with ksh ?
Briefly, the following shell:

Quote:> #! /usr/bin/ksh
> USERS="user1 user2 user3 user4"

> for user in $USERS; do
>    print ~$user
> done

> exit

Does not work as I would like, i.e. it prints ~user1, ~user2 instead
of the home directories ... :-( Do not reply me to get the home from
the passwd file (or nis map) with awk.  I'm aware of that solution but
I do not like it very much.

Thanks for your help,
Alain
--
Dr. Alain H. Ninane     | Tel : +32-10-47.32.32 - Fax: +32-10-45.21.83

Nuclear Physics Dept.   | Ch. du Cyclotron, 2
B-1348 Louvain-la-Neuve | BELGIUM              

Quote:>Is there a way to perform tilde substitution on variables with ksh ?

>>        print ~$user

Try
    eval print ~$user

This will scan the command twice, once expanding the $user, and once
expanding the home directory.

Hope this helps
--
Mark Rafn                    "If you're not part of the solution,

Quote:>Folks,
>Is there a way to perform tilde substitution on variables with ksh ?
>Briefly, the following shell:

>> #! /usr/bin/ksh
>> USERS="user1 user2 user3 user4"

>> for user in $USERS; do
>>        print ~$user
>> done

>> exit

>Does not work as I would like, i.e. it prints ~user1, ~user2 instead
>of the home directories ... :-( Do not reply me to get the home from
>the passwd file (or nis map) with awk.  I'm aware of that solution but
>I do not like it very much.

try:

eval print ~$user

---

Mario

Mario M. Butter


#include <std-disclaimer.h>

I see a dark sail on the horizon -
    set under a black cloud that hides the sun.
Bring me my broadsword, and clear understanding.
    Bring me my cross of gold as a talisman.
                     - Jethro Tull, Broadsword.

: > #! /usr/bin/ksh
: > USERS="user1 user2 user3 user4"
: >
: > for user in $USERS; do
: >  print ~$user
: > done
: >
: > exit

: Does not work as I would like, i.e. it prints ~user1, ~user2 instead
: of the home directories ... :-( Do not reply me to get the home from
: the passwd file (or nis map) with awk.  I'm aware of that solution but
: I do not like it very much.

Just do
     eval print ~$user
in place of
     print ~$user

- Anand

Quote:>Folks,
>Is there a way to perform tilde substitution on variables with ksh ?
>Briefly, the following shell:

>> #! /usr/bin/ksh
>> USERS="user1 user2 user3 user4"

>> for user in $USERS; do
>>        print ~$user
>> done

>> exit

>Does not work as I would like, i.e. it prints ~user1, ~user2 instead
>of the home directories ... :-( Do not reply me to get the home from
>the passwd file (or nis map) with awk.  I'm aware of that solution but
>I do not like it very much.

try:

eval print ~$user

John.

Quote:> Folks,
> Is there a way to perform tilde substitution on variables with ksh ?
> Briefly, the following shell:
> > #! /usr/bin/ksh
> > USERS="user1 user2 user3 user4"

> > for user in $USERS; do
> >       print ~$user
> > done

> > exit
> Does not work as I would like, i.e. it prints ~user1, ~user2 instead
> of the home directories ... :-( Do not reply me to get the home from
> the passwd file (or nis map) with awk.  I'm aware of that solution but
> I do not like it very much.

I am afraid it is exacrly the only solution ksh can manage, because it
doesn't have builtin tilde expansion.  Try using bash instead.  It is more
or less compatible with ksh, and supports this feature.  Only, that line
should be:
eval echo \~$user

Hrv
--
Hrvoje Niksic                |

http://www.srce.hr/~hniksic/ |  University of Zagreb, Croatia
-------------------------------------------------------------------

Quote:>Is there any virus protections software for UNIX systems??

Yes.  It is called UNIX.

I am afraid you are incorrect, Mr. Niksic:
        eval print ~$(print $user)

In addition, this solution does not exec any new processes so it is fast and
system-friendly, and the same general form can be used for many similar
operations.

] > Is there a way to perform tilde substitution on variables with ksh ?

] > > #! /usr/bin/ksh
] > > USERS="user1 user2 user3 user4"
] > >
] > > for user in $USERS; do
] > >     print ~$user
] > > done
] > >
] > > exit

] > Does not work as I would like, i.e. it prints ~user1, ~user2 instead
] > of the home directories ... :-( Do not reply me to get the home from
] > the passwd file (or nis map) with awk.  I'm aware of that solution but
] > I do not like it very much.

] I am afraid it is exacrly the only solution ksh can manage, because it
] doesn't have builtin tilde expansion.  Try using bash instead.  It is more
] or less compatible with ksh, and supports this feature.  Only, that line
] should be:
] eval echo \~$user

--

        Jam

        maJ