08-04-2008
Quote:
Originally Posted by
broli
so, if i read your post correctly, with awk i can simulate sime functions of tail or head...
what about sort?
Modern versions of awk have a sort command. I'm not sure if it was included even in the original awk.
Quote:
well. i see now, that perl is a best solution than bash. after all perl was made to process text right? :P
and perl has always been in my todo-list
the problem there would be to pipe the info to dzen
because the way dzen works, i need an never ending loop, so dzen dosnt die
is posible to do that piping from a perl script?
Certainly, but I'm not really suggesting you move to Perl just for this. There are really two schools of thought on this; skip awk, and only learn Perl; or move to Perl if you run into situations which awk cannot handle comfortably. If you need to process binary data or very large data sets, Perl was designed to overcome the limitations awk have in those areas.
But the requirements you have shown so far should be easy to handle in awk; it's just not clear from reading the code in which direction you want the script to grow, and/or I was too lazy to rewrite it all.
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RBASH(1) General Commands Manual RBASH(1)
NAME
rbash - restricted bash, see bash(1)
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU Bash-4.0 2004 Apr 20 RBASH(1)