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Full Discussion: Help on for loop in bash
Top Forums Shell Programming and Scripting Help on for loop in bash Post 302976073 by Ra26k on Thursday 23rd of June 2016 10:49:24 AM
Old 06-23-2016
Hi Don,

Sorry for the delay in response. Before you further analyse the code I would request you to go through the POST#1 (entire script and the purpose has been stated there).

Here is the real code (to search for file-names (patterns) in the PATH). Here it reads the command line arguments for variable "pattern" (file-names). It search for every provided files in the PATH once if we don't use the option "all" (refer the usage) in POST#1. If we use the option "all" then it go through the loop again and look for the same files in other directories in the PATH

Code:
for pattern in "$@"
do
  result=
  for dir in $dirpath
  do
    for file in $dir/$pattern
    do
      if test -f "$file"
      then
      result="$file"
      echo $result
      test "$all" = "no" && break 2
      fi
    done
  done
  test -z "$result" && warning "$pattern: not found"
done

What I would like to achieve from this script is here:

I want the script to read the file-names under variable "pattern" from the standard input if no command line arguments are provided and read the command line arguments when provided. However, I am not able to achieve both at the same time.

Here are your answers you asked in your post:

1. I don't quote the patterns.
2. When I read the file-names (patterns) from standard input.
Last edited by Ra26k; 06-23-2016 at 12:03 PM..
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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