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Re^4: How to call Linux command sequentially

by mv.ashwin@gmail.com (Novice)
on Sep 13, 2011 at 09:22 UTC ( [id://925656]=note: print w/replies, xml ) Need Help??


in reply to Re^3: How to call Linux command sequentially
in thread How to call Linux command sequentially

OK there was syntax problem i was able to run the command. But here comes another problem. The first command here creates the an environment, in that environment i need to execute the second command. Here nither system nor exec will do these. Untill I manually exit from environment the second command is not running. Once i exit from environment the second executes. But i need the second command to be executed in environment which was set by first command. Is it possible to do so? Please help!!!!
  • Comment on Re^4: How to call Linux command sequentially

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Re^5: How to call Linux command sequentially
by Corion (Patriarch) on Sep 13, 2011 at 09:25 UTC
[reply]
Re^5: How to call Linux command sequentially
by graff (Chancellor) on Sep 13, 2011 at 09:33 UTC
    You could try something like: 
    #!/usr/bin/perl

use strict;

my $shpid = open( SH, '|-', '/bin/bash' ) or die "Can't launch bash: $
+!\n";

my @command_list = ( 
   "first_command args ...\n",
   "second_command args ...\n"
   ... );

for my $cmd ( @command_list ) {
    print SH $cmd;
}
print SH "exit\n";
waitpid( $shpid, 0 );

    [download]
    If the list of commands actually includes things that change the shell environment for subsequent commands, that should work as intended.
[reply]
[d/l]

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