GREP(1)                                                   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
                pattern.
          -i    Ignore upper/lower case distinction during
                comparisons.
          -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
                unreadable 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).

     BUGS
          Lines are limited to BUFSIZ characters; longer lines are



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     GREP(1)                                                   GREP(1)



          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.

     ORIGIN
          AT&T V.3
















































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