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.TH ZGREP 1 
.SH NAME 
zgrep \- search possibly compressed files for a regular expression 
.SH SYNOPSIS 
.B zgrep 
[ grep_options ] 
.BI  [\ -e\ ] " pattern" 
.IR filename ".\|.\|." 
.SH DESCRIPTION 
.IR  Zgrep 
is used to invoke the 
.I grep 
on compress'ed or gzip'ed files. All options specified are passed directly to 
.I 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 
.I grep. 
.PP 
If 
.I zgrep 
is invoked as 
.I zegrep 
or 
.I zfgrep 
then 
.I egrep 
or 
.I fgrep 
is used instead of 
.I grep. 
If the GREP environment variable is set, 
.I zgrep 
uses it as the 
.I grep 
program to be invoked. For example: 
 
    for sh:  GREP=fgrep  zgrep string files 
    for csh: (setenv GREP fgrep; zgrep string files) 
.SH AUTHOR 
Charles Levert (charles@comm.polymtl.ca) 
.SH "SEE ALSO" 
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), 
gzip(1), gzexe(1)