comm(1) [opensolaris man page]

comm(1) 							   User Commands							   comm(1)

NAME

       comm - select or reject lines common to two files

SYNOPSIS

       comm [-123] file1 file2

DESCRIPTION

       The comm utility reads file1 and file2, which must be ordered in the current collating sequence, and produces 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    Suppresses the output column of lines unique to file1.

       -2    Suppresses the output column of lines unique to file2.

       -3    Suppresses 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 contain a sorted list of utilities, the command

	 example% comm -23 file1 file2	| comm -23 - file3

       prints a list of utilities in file1 not specified by either of the other files. The entry:

	 example% comm -12 file1 file2 | comm -12 - file3

       prints a list of utilities specified by all three files. And the entry:

	 example% comm -12  file2 file3 | comm -23 -file1

       prints 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: LANG, LC_ALL, 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 attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.11							    3 Mar 2004								   comm(1)

Check Out this Related Man Page

cmp(1)								   User Commands							    cmp(1)

NAME

       cmp - compare two files

SYNOPSIS

       cmp [-l] [-s] file1 file2 [skip1] [skip2]

DESCRIPTION

       The cmp utility compares two files. cmp will write no output if the files are the same. Under default options, if they differ, it writes to
       standard output the byte and line numbers at which the first difference occurred. Bytes and lines are numbered beginning  with  1.  If  one
       file  is  an  initial  subsequence  of the other, that fact is noted. skip1 and skip2 are initial byte offsets into file1 and file2 respec-
       tively, and may be either octal or decimal; a leading 0 denotes octal.

OPTIONS

       The following options are supported:

       -l	Write the byte number (decimal) and the differing bytes (octal) for each difference.

       -s	Write nothing for differing files; return exit statuses only.

OPERANDS

       The following operands are supported:

       file1	A path name of the first file to be compared. If file1 is -, the standard input will be used.

       file2	A path name of the second file to be compared. If file2 is -, the standard input will be used.

       If both file1 and file2 refer to standard input or refer to the same FIFO special, block  special  or  character  special  file,  an  error
       results.

USAGE

       See largefile(5) for the description of the behavior of cmp when encountering files greater than or equal to 2 Gbyte (2**31 bytes).

EXAMPLES

       Example 1: Comparing files byte for byte

       The following example:

       example% cmp file1 file2 0 1024

       does a byte for byte comparison of file1 and file2. It skips the first 1024 bytes in file2 before starting the comparison.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions of the following environment variables that affect the execution of cmp: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following error values are returned:

       0	The files are identical.

       1	The files are different; this includes the case where one file is identical to the first part of the other.

       >1	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       comm(1), diff(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.10							    1 Feb 1995								    cmp(1)

Linux and UNIX Man Pages

comm(1) [opensolaris man page]

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