Re: NSTask not using arguments?
Re: NSTask not using arguments?
- Subject: Re: NSTask not using arguments?
- From: Sherm Pendley <email@hidden>
- Date: Fri, 25 Feb 2005 12:47:09 -0500
On Feb 25, 2005, at 12:10 AM, <email@hidden> wrote:
From: Sherm Pendley <email@hidden>
Right. The launch path would be "/bin/sh". The first argument "-c",
and
the second the complete command you wanted to execute. It would be a
really good idea to include fully-qualified path names.
Actually, Douglas Davidson's suggestion on getting the file looks to
be a more streamlined approach.
We're actually talking about the *same* approach, just different
aspects of it. What I meant by "fully-qualified path name" is a path
name starting at the root directory - "/". Douglas' suggestion was
about how to *get* such a path without hard-coding it in your source,
and he's correct.
find /path/to/files -name '*.ext' -print0 | xargs -0 /path/to/command
Find will list the file names it finds, with NULs as separators.
Xargs,
with the -0 switch, expects a list of NUL-separated strings as its
input, and will provide those strings as arguments to the command
specified.
I'm not much a UNIX type of guy, still learning, so maybe you could
help me out? How would I format the above command for something such
as this: $:> md5sum -b [list of files to process] > md5sum.md5
You say that it will provide those strings as arguments, but the list
of files isn't the first argument, there's a switch first.
It's not immediately obvious, but xargs will *append* those strings,
after whatever arguments you specify directly. So:
find /path/to/files -name '*.ext' -print0 | xargs -0 md5sum -b >
/path/to/md5sum.md5
Again, I'm a bit of a UNIX n00b, but these small programs aren't very
complicated to run; they take simple commands and switches and such.
I really like this method of using sh as the task and sending it the
one command, seems much easier for what I'm trying to do.
Yeah, it makes life *so* much easier when you want to use file globs,
chain together multiple command-line tools, and such.
sherm--
Cocoa programming in Perl: http://camelbones.sourceforge.net
Hire me! My resume: http://www.dot-app.org
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