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  3. Redirecting a command output to a file.

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Redirecting a command output to a file.

nozuey
nozuey over 14 years ago

Hi,

How can I redirect the output from    puts [find / -instance "U_*"]   to a file  on RTL Compiler ?

 I simply tried > and this is what I got.

rc:/designs> puts [find / -instance "U_*"]  > inst
bad argument "inst": should be "nonewline"

I also wonder why redirection with > works differently on different commands, even though they all output the results to STDOUT.  I mean "report area > file" works, but find / -instance "*" > file does not.  Any thoughts ?

 

Thanks

 

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  • grasshopper
    grasshopper over 14 years ago

     Hi nozuey,

     remember that the RC shell / session is a TCL shell and not the same as *nix shell hence command syntax is not the same. Some commands do support the '>' redirection characters as an option but not all do. Using the -help option of any command should make that evident. The reirect command is usually your best bet for redirection so you can do something like

     

    redirect <file name> { puts [find ....] }

    or simply put things into a variable for processing using something like

     set my_var [find...]

     

    hope this helps,

    gh- 

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  • bmiller
    bmiller over 14 years ago

    In addition to what grasshopper mentioned, you can consider using standard TCL syntax to output "puts" to a file:

     

    set _file [open file.txt w]
    puts $_file [find ....]
    close $_file


    Or, to output the result one line at a time:

    set _file [open file.txt w]
    foreach i [find ....] {puts $_file $i}
    close $_file


    Good Luck!

     

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