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Top Forums Shell Programming and Scripting Doing a tail in a script and then return back and continue script Post 302469027 by markdark on Thursday 4th of November 2010 12:39:18 PM
Old 11-04-2010
Doing a tail in a script and then return back and continue script

Hello all,

I am trying to do a tail in a script. But when I quit the tail my script quits also. This is not what I want. I am struggling to get this done.

PHP Code:
#!/bin/bash
 
askFile() {
  echo -
"Enter file: "
  
read FILE
}
 
doTail() {
  
tail -"${1}"
}
 
askFile
doTail 
"${FILE}"
askFile
doTail 
"${FILE}
Above is just a simple example what I am trying to do. As you see I first ask for a file. Then I do a tail on this file. If you now quit the tail by entering CTRL+C the total script stops. But I want it to ask for a file again.

Does anyone know how to do this?

Thanks in advance for any help.

Mark
 

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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)
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