zgrep − search possibly compressed files for a regular

zgrep [ grep_options ] [ ‐e ] pattern

is used to invoke the grep on compress’ed or gzip’ed files.
All 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 zgrep is invoked as zegrep or zfgrep then egrep or
fgrep is used instead of grep.  If the GREP environment
variable is set, zgrep uses it as the grep program to be
invoked. For example:

    for sh:  GREP=fgrep  zgrep string files
    for csh: (setenv GREP fgrep; zgrep string files)

Charles Levert (charles@comm.polymtl.ca)

grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1),
zforce(1), gzip(1), gzexe(1)