Very good point...should have thought of that ;) I think an even more important question is why the user is trying to write bash or csh. I can't imagine anything that can be done in shell but not in perl (with some POSIX calls). Why not try to eliminate the dependency on the shell and use more perl.
Tanton ----- Original Message ----- From: "Peter Scott" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, October 30, 2002 11:23 AM Subject: Re: c shell commands in perl script > > In article <000f01c2802a$a988ece0$80b59c42@brooklyn>, > [EMAIL PROTECTED] (Tanton Gibbs) writes: > >More than likely, you are misusing system. > > > >If you are saying system( "csh" ); system( "ls -l" ) ... > >Then you are not understanding how system works. Everything system is > >executed it spawns > >a subshell which is destroyed on termination of the system call. Therefore, > >your csh does not last past the end of the first system call. To do this > >correctly, bundle all of your commands up into one system call and separate > >them with semicolons. system( "csh;ls -l" ); > > Did you try this? It doesn't do what the poster wanted. It launches an > interactive csh which gives the user a prompt, and interacts with the user > until they exit the shell, at which time it goes on to the "ls -l". > > In other words, exactly the same as system( "csh" ); system( "ls -l" ). > > To run commands under the c shell, give them as an argument to csh: > > % perl -e 'system q(echo ~)' > ~ > % perl -e 'system q(csh -c "echo ~")' > /home/peter > > > >HTH, > >Tanton > >----- Original Message ----- > >From: "Elanchezhian Sivanandam" <[EMAIL PROTECTED]> > >To: "beginners" <[EMAIL PROTECTED]> > >Sent: Thursday, October 31, 2002 1:45 AM > >Subject: c shell commands in perl script > > > > > >> hi, > >> i have to give a set of commands from a perlscript in bash and c > >> shell depending on an argument. > >> since my default shell is bash the commands i give work. > >> but for c shell the set of commands don't execute..... > >> i mean the subsequent commands after i go to c shell (system > >> "csh";) doesn't work. > >> > >> any suggestions??? > >> thanks u > > -- > Peter Scott > http://www.perldebugged.com > > -- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
