comm

 

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 User Commands                                             comm(1)
 
 
 


NAME
      comm - select or reject lines common to two files
 


SYNOPSIS
      comm [ -123 ]  file1  file2
 


DESCRIPTION
      The comm utility will read file1 and file2, which should  be
      ordered in the current collating sequence, and produce three
      text columns as output: lines only in file1; lines  only  in
      file2; and lines in both files.
 
      If the input files were ordered according to  the  collating
      sequence of the current locale, the lines written will be in
      the collating sequence of the original lines.  If  not,  the
      results are unspecified.
 


OPTIONS
      The following options are supported:
 
      -1    Suppress the output column of lines unique to file1.
 
      -2    Suppress the output column of lines unique to file2.
 
      -3    Suppress the output  column  of  lines  duplicated  in
            file1 and file2.
 


OPERANDS
      The following operands are supported:
 
      file1 A path name of the first file to be compared. If file1
            is -, the standard input is used.
 
      file2 A path name of the second  file  to  be  compared.  If
            file2 is -, the standard input is used.
 
 USAGE
      See largefile(5) for the description of the behavior of comm
      when encountering files greater than or equal to 2 Gbyte ( 2
     **31 bytes).
 
 EXAMPLES
      Example 1: Printing a list of utilities specified by files.
 
      If file1, file2, and file3 each contained a sorted  list  of
      utilities:
 
      example% comm -23 file1 file2  | comm -23 - file3
      would print a list of utilities in file1  not  specified  by
      either of the other files;
 
 
 
 
 
 SunOS 5.8           Last change: 21 Feb 1996                    1
 
 
 
 
 
 
 User Commands                                             comm(1)
 
 
 
      example% comm -12 file1 file2 | comm -12 - file3
      would print a list  of  utilities  specified  by  all  three
      files; and
 
      example% comm -12  file2 file3 | comm -23 -file1
      would print a list of utilities specified by both file2  and
      file3, but not specified in file1.
 
 ENVIRONMENT VARIABLES
      See environ(5) for descriptions of the following environment
      variables  that  affect  the  execution of comm: LC_COLLATE,
      LC_CTYPE, LC_MESSAGES, and NLSPATH.
 
 EXIT STATUS
      The following exit values are returned:
 
      0     All input files were successfully output as specified.
 
      >0    An error occurred.
 


ATTRIBUTES
      See attributes(5) for descriptions of the  following  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | Availability                | SUNWesu                     |
     |_____________________________|_____________________________|
     | CSI                         | enabled                     |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      cmp(1),   diff(1),    sort(1),    uniq(1),    attributes(5),
      environ(5), largefile(5)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8           Last change: 21 Feb 1996                    2
 
 
 

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