RGREP(1) User Manuals RGREP(1)NAMErgrep - a recursive, highlighting grep program
SYNOPSISrgrep [ options ] pattern [ file ] ...
DESCRIPTION
rgrep, unlike grep(1) and egrep(1)rgrep has the ability to recursively
descend directories. The traditional way of performing this kind of
search on Unix systems utilizes the find(1) command in conjunction with
grep(1). However, this results in very poor performance.
COMMAND LINE OPTIONS
-?
additional help (use '-?' to avoid shell expansion on some sys‐
tems)
-c
count matches
-h
highlight match (ANSI compatable terminal assumed)
-H
Output match instead of entire line containing match
-i
ignore case
-l
list filename only
-n
print line number of match
-F
follow links
-r
recursively scan through directory tree
-N
Do NOT perform a recursive search
-R 'pat'
like '-r' except that only those files matching 'pat' are
checked
-v
print only lines that do NOT match the specified pattern
-x 'ext'
checks only files with extension given by 'ext'.
-D
Print all directories that would be searched. This option is
for debugging purposes only. No file is grepped with this
option.
-W 'len'
lines are 'len' characters long (not newline terminated).
SUPPORTED REGULAR EXPRESSIONS:
.
match any character except newline
\d
match any digit
\e
match ESC char
*
matches zero or more occurences of previous RE
+
matches one or more occurences of previous RE
?
matches zero or one occurence of previous RE
^
matches beginning of line
$
matches end of line
[ ... ]
matches any single character between brackets. For example,
[-02468] matches '-' or any even digit. and [-0-9a-z] matches
'-' and any digit between 0 and 9 as well as letters a through
z.
\{ ... \}
\( ... \)
\1, \2, ..., \9
matches match specified by nth '\( ... \)' expression. For
example, '\([ \t][a-zA-Z]+\)\1[ \t]' matches any word repeated
consecutively.
EXAMPLES
Look in all files with a 'c' extension in current directory and all its
subdirectories looking for matches of 'int ' at the beginning of a
line, printing the line containing the match with its line number: (two
methods)
rgrep-n -R '*.c' '^int ' .
rgrep-n -x c '^int ' .
Highlight all matches of repeated words in file 'paper.tex':
rgrep-h '[ \t]\([a-zA-Z]+\)[ \t]+\1[ \t\n]' paper.tex
rgrep-h '^\([a-zA-Z]+\)[ \t]+\1[ \t\n]' paper.tex
(Note that this version of rgrep requires two passes for this example)
Search through all files EXCEPT .o and .a file below /usr/src/linux
looking for the string 'mouse' without regard to case:
rgrep-i -R '*.[^ao]' mouse /usr/src/linux
Search a fixed record length FITS file for the keyword EXTNAME:
rgrep-W80 ^EXTNAME file.fits
(Note that the regular expression '^[A-Z]+' will dump all fits head‐
ers.)
AUTHOR
"John E. Davis" <davis@space.mit.edu>
-- This manpage was translated to troff by
"Boris D. Beletsky" <borik@isracom.co.il>
Debian OCT 1996 RGREP(1)
