Hi, I will try to keep my post as compressed as my title was.
I am writing on pseudo code on a recursive function that I want to read from the one-above function-run and then give the result to the function-run down below until a stop is triggered. Example:
Code:
$ ls -la | grep x | sort
In my function what I want ls to run and send the result to the next function call.
What I've got so far:
Code:
main:
create a char **program_names and set int times_to_run to amount of names.
call rec(program_names, times_to_run)
rec(char** program_names, int times_to_run):
if times_to_run is 0 return, else do
int fd[2]
pipe(fd)
replace stdout with fd[1]
fork
parent:
execl(*(program_names+times_to_run))
child:
replace stdin with fd[0]
//waitpid(getppid()) ?
call rec(program_names, times_to_run-1)
Does this seem right? I'm having a hard time with recursion.
Cheers.
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Discussion started by: dano88
2 Replies
LEARN ABOUT LINUX
zegrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)
07-05-2012
