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Top Forums Shell Programming and Scripting Capturing first output from 'top'-likes command Post 302584241 by Corona688 on Thursday 22nd of December 2011 12:21:24 PM
Old 12-22-2011
top and other interactive commands like it are prone to create outputs full of escape sequences that are difficult to view without a terminal, no matter how they're captured.

top itself can do this, so you don't need to kill it:
Code:
top -n 1 > output

---------- Post updated at 11:21 AM ---------- Previous update was at 11:19 AM ----------

Quote:
Originally Posted by Shawn, Lee
The command is not 'top' and no command line options. Just top-like command.
It displays third-party app. engine's status...

Thanks,
If it works, it's not stupid, but whether and how well it will work depends on the application. The output might not be very readable without a terminal. It'd be better to get the output with the application's cooperation, if possible.

'cat myapp.out' may be misleading. When you do that in a terminal, the terminal will interpret escape sequences for you and present the output properly. But if you try sending that to a printer, or process it with commandline tools, you could find it full of gibberish.

Code:
myapp > myapp.out &
PID=$!
sleep 2
kill $PID
less myapp.out


Last edited by Corona688; 12-22-2011 at 02:09 PM.. Reason: thanks methyl
This User Gave Thanks to Corona688 For This Post:
 

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NEON-CONFIG(1)							       neon							    NEON-CONFIG(1)

NAME
neon-config - script providing information about installed copy of neon library SYNOPSIS
neon-config [--prefix] [--cflags | --libs | --support feature | --help | --version] DESCRIPTION
The neon-config script provides information about an installed copy of the neon library. The --cflags and --libs options instruct how to compile and link an application against the library; the --version and --support options can help determine whether the library meets the applications requirements. OPTIONS
--cflags Print the flags which should be passed to the C compiler when compiling object files, when the object files use neon header files. --libs Print the flags which should be passed to the linker when linking an application which uses the neon library --version Print the version of the library --prefix dir If dir is given; relocate output of --cflags and --libs as if neon was installed in given prefix directory. Otherwise, print the installation prefix of the library. --support feature The script exits with success if feature is supported by the library. --help Print help message; includes list of known features and whether they are supported or not. EXAMPLE
Below is a Makefile fragment which could be used to build an application against an installed neon library, when the neon-config script can be found in $PATH. CFLAGS = `neon-config --cflags` LIBS = `neon-config --libs` OBJECTS = myapp.o TARGET = myapp $(TARGET): $(OBJECTS) $(CC) $(LDFLAGS) -o $(TARGET) $(OBJECTS) $(LIBS) myapp.o: myapp.c $(CC) $(CFLAGS) -c myapp.c -o myapp.o AUTHOR
Joe Orton <neon@webdav.org>. neon 0.23.5 8 October 2002 NEON-CONFIG(1)
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