02-28-2002
Re: using command line input in C code
Quote:
Originally posted by vannie
Hi
I need to list files by their size and exclude those that match a certain size. With grep it is easy enough.
ll -rt | grep 2166 | awk '{print $9}'
2166 is the filesize and $9 the filenamefield.
What should I be looking for to use this in a C program? My aim is to cut the name field of the files and match that up with report names and only show reports which have been populated.
You might also be able to use the native C library to check file specific information, like fstat(), etc. to determine file size, do a man fstat.
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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)