Avoiding new line for the counts Post: 303012522

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Top Forums Shell Programming and Scripting Avoiding new line for the counts Post 303012522 by Don Cragun on Monday 5th of February 2018 12:41:34 PM

02-05-2018

Registered User

This is another example of why you should always tell us what operating system and shell you're using when you post a question in this forum.

From what I have seen in other threads in this forum recently, you might get the output you wanted with your code if you were running it on a Linux system. You certainly will not get what you want (and will get what you are seeing) if you run it on a UNIX or BSD system.

Either of the following should work reliably on any of these systems:

Code:

printf "%s\n" "Number of transactions in $i : `cat $i | tail +2 | wc -l`" >> ${LOG_FILE}

(which may produce varying numbers of spaces between the colon and the following number) or:

Code:

printf 'Number of transactions in %s : %d\n' "$i" `tail +2 "$i" | wc -l`  >> ${LOG_FILE}

(which will only put one space between the colon and the number of lines in the truncated file).

It would also be more efficient if you moved the redirection from the printf to the end of the outer loop.

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LEARN ABOUT DEBIAN

plan9-tail

TAIL(1) 						      General Commands Manual							   TAIL(1)

NAME

       tail - deliver the last part of a file

SYNOPSIS

       tail [ +-number[lbc][rf] ] [ file ]

       tail [ -fr ] [ -n nlines ] [ -c nbytes ] [ file ]

DESCRIPTION

       Tail copies the named file to the standard output beginning at a designated place.  If no file is named, the standard input is copied.

       Copying	begins	at  position  +number  measured  from the beginning, or -number from the end of the input.  Number is counted in lines, 1K
       blocks or bytes, according to the appended flag or Default is -10l (ten ell).

       The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end,	to
       keep watch and print further data as it appears.

       The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed.

EXAMPLES

       tail file
	      Print the last 10 lines of a file.

       tail +0f file
	      Print a file, and continue to watch data accumulate as it grows.

       sed 10q file
	      Print the first 10 lines of a file.

SOURCE

       /src/cmd/tail.c

BUGS

       Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length.

       According to custom, option +number counts lines from 1, and counts blocks and bytes from 0.

       Tail is ignorant of UTF.

																	   TAIL(1)