grep(1)                  USER COMMANDS                    grep(1)



NAME
     grep - search a file for a pattern

SYNOPSIS
     grep [options] limited regular expression [file ...]

DESCRIPTION
     grep searches files for a pattern and prints all lines  that
     contain that pattern.  grep uses limited regular expressions
     (expressions that have string values that use  a  subset  of
     the possible alphanumeric and special characters) like those
     used with ed(1) to match the patterns.  It  uses  a  compact
     non-deterministic algorithm.

     Be careful using the characters $, *, [, ^, |, (, ),  and  \
     in  the  limited  regular  expression  because they are also
     meaningful to the shell.  It is safest to enclose the entire
     limited regular expression in single quotes '...'.

     If no files are  specified,  grep  assumes  standard  input.
     Normally, each line found is copied to standard output.  The
     file name is printed before each line found if there is more
     than one input file.

     Command line options are:

     -b    Precede each line by the block number on which it  was
           found.   This  can be useful in locating block numbers
           by context (first block is 0).
     -c    Print only a count of the lines that contain the  pat-
           tern.
     -i    Ignore upper/lower case distinction  during  comparis-
           ons.
     -h    Prevents the name of the file containing the  matching
           line  from  being  appended  to  that line.  Used when
           searching multiple files.
     -l    Print the names of files  with  matching  lines  once,
           separated  by new-lines.  Does not repeat the names of
           files when the pattern is found more than once.
     -n    Precede each line by  its  line  number  in  the  file
           (first line is 1).
     -s    Suppress error messages about nonexistent  or  unread-
           able files
     -v    Print all lines except those that contain the pattern.

SEE ALSO
     ed(1), egrep(1), fgrep(1), sed(1), sh(1).

DIAGNOSTICS
     Exit status is 0 if any matches are found, 1 if none, 2  for
     syntax  errors  or  inaccessible files (even if matches were
     found).



                                                                1

grep(1)                  USER COMMANDS                    grep(1)



BUGS
     Lines are limited to BUFSIZ  characters;  longer  lines  are
     truncated.  BUFSIZ is defined in /usr/include/stdio.h.
     If there is a line with embedded nulls, grep will only match
     up  to  the  first  null;  if  it matches, it will print the
     entire line.

















































                                                                2