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Full Discussion: recognizing * character
Top Forums Shell Programming and Scripting recognizing * character Post 89790 by mschwage on Tuesday 15th of November 2005 10:54:22 PM
Old 11-15-2005
Shell metacharacters

Quote:
Originally Posted by csejl
i have a short script that takes a filename and secure copies the file to a remote machine. i'd like to be able to take a * character and secure copy all the files in the directory.
It sounds to me like you're trying to do the work that the shell already does for you.

Say I cd to /tmp and do ls * . Say it comes back with
file1 file2 file3

Then I create a script in my home directory. Call it foo. Now I cd to /tmp, run the command foo, with * as an argument: ~/foo * . Note that the script "foo" is NOT given a * as an argument. Because what the shell does, before it even executes the command (which is my shell script), is to: Expand variables, Expand metacharacters, and Expand commands in backticks (or $( ...) in ksh ). So when I type
Code:
~/foo  *

, the shell does not run
Code:
~/foo  *

. It expands the *, and really runs
Code:
~/foo   file1 file2 file3

.

So what you're thinking of doing is actually
Code:
 scp  $@ user@ip:

I don't believe you need or want a directory in the "user@ip:" part of the scp because your files will by default be placed in the home directory of user over at your host given by ip.

Finally, I'm not sure of the syntax of the scp command with multiple files. Try doing two of them first, and see if it works. Remember that metacharacters aren't magic, they are pretty ignorant although powerful. What they do is serve as placeholders for a replacement. The shell does the replacing, then and only then does your script or command get the results of the replacement(s).
-mschwage
 

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IDLE(1) 						      General Commands Manual							   IDLE(1)

NAME
IDLE - An Integrated DeveLopment Environment for Python SYNTAX
idle [ -dins ] [ -t title ] [ file ...] idle [ -dins ] [ -t title ] ( -c cmd | -r file ) [ arg ...] idle [ -dins ] [ -t title ] - [ arg ...] DESCRIPTION
This manual page documents briefly the idle command. This manual page was written for Debian because the original program does not have a manual page. For more information, refer to IDLE's help menu. IDLE is an Integrated DeveLopment Environment for Python. IDLE is based on Tkinter, Python's bindings to the Tk widget set. Features are 100% pure Python, multi-windows with multiple undo and Python colorizing, a Python shell window subclass, a debugger. IDLE is cross-plat- form, i.e. it works on all platforms where Tk is installed. OPTIONS
-h Print this help message and exit. -n Run IDLE without a subprocess (see Help/IDLE Help for details). The following options will override the IDLE 'settings' configuration: -e Open an edit window. -i Open a shell window. The following options imply -i and will open a shell: -c cmd Run the command in a shell, or -r file Run script from file. -d Enable the debugger. -s Run $IDLESTARTUP or $PYTHONSTARTUP before anything else. -t title Set title of shell window. A default edit window will be bypassed when -c, -r, or - are used. [arg]* and [file]* are passed to the command (-c) or script (-r) in sys.argv[1:]. EXAMPLES
idle Open an edit window or shell depending on IDLE's configuration. idle foo.py foobar.py Edit the files, also open a shell if configured to start with shell. idle -est "Baz" foo.py Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell window with the title "Baz". idle -c "import sys; print sys.argv" "foo" Open a shell window and run the command, passing "-c" in sys.argv[0] and "foo" in sys.argv[1]. idle -d -s -r foo.py "Hello World" Open a shell window, run a startup script, enable the debugger, and run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in sys.argv[1]. echo "import sys; print sys.argv" | idle - "foobar" Open a shell window, run the script piped in, passing '' in sys.argv[0] and "foobar" in sys.argv[1]. SEE ALSO
python(1). AUTHORS
Various. 21 September 2004 IDLE(1)
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