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Top Forums Shell Programming and Scripting Moving line up if line starts with + sign. Post 302804609 by Don Cragun on Thursday 9th of May 2013 02:45:21 AM
Old 05-09-2013
If the first line of input happens to start with a plus sign, all of the scripts provided so far will skip that line. If the input file could ever have this condition, the following alternative script should work:
Code:
awk '/^[+]/ {printf("%s", $0);next}
{printf("%s%s", NR > 1 ? "\n" : "", $0)}
END{print ""}' file1 > file2

With the sample input file hanson44 provided, the output placed into file2 will be:
Code:
Line 1+ Line 2
Line 3+ Line 4+ Line 5
Line 6+ Line 7+ Line 8+ Line 9
Line 10
Line 11

If the contents of file1 is:
Code:
+ Line 2
Line 3
+ Line 4
+ Line 5
Line 6
+ Line 7
+ Line 8
+ Line 9

the output placed into file2 will be:
Code:
+ Line 2
Line 3+ Line 4+ Line 5
Line 6+ Line 7+ Line 8+ Line 9

As always, if you're going to run this on a Solaris/SunOS system, use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk.
 

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mv(1)							      General Commands Manual							     mv(1)

Name
       mv - move or rename files

Syntax
       mv [-i] [-f] [-] file1 file2

       mv [-i] [-f] [-] file... directory

Description
       The command moves (changes the name of) file1 to file2.

       If  file2  already  exists,  it is removed before file1 is moved.  If file2 has a mode which forbids writing, prints the mode and reads the
       standard input to obtain a line.  If the line begins with y, the move takes place.  If it does not, exits.  For further information, see

       In the second form, one or more files (plain files or directories) are moved to the directory with their original file-names.

       The command refuses to move a file onto itself.

Options
       -		   Interprets all following arguments as file names to allow file names starting with a minus.

       -f		   Force. This option overrides any mode restrictions or the -i switch.

       -i		   Interactive mode.  If a move is to supersede an existing file, the system prompts youw with the name of the	file  fol-
			   lowed  by  a question mark.	If you type a string that begins with y, the move occurs.  If you type any other response,
			   the move does not occur.

Restrictions
       If file1 and file2 lie on different file systems, must copy the file and delete the original.  In this case the owner name becomes that	of
       the copying process and any linking relationship with other files is lost.

See Also
       cp(1), ln(1)

																	     mv(1)
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