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Full Discussion: Problems with "exit" called from function in bourne script
Top Forums UNIX for Dummies Questions & Answers Problems with "exit" called from function in bourne script Post 302633635 by neutronscott on Wednesday 2nd of May 2012 09:24:29 AM
Old 05-02-2012
ahhhhh haha. i should have forseen this. this is normal here. the problem is you are in a subshell!
everything done by | while read is not executed in same context. this shows more clearly with variables:

Code:
[mute@geek ~]$ cat subshell
#!/bin/busybox sh

i=0
printf '%s\n' foo bar baz | while read var; do
        let i++
        echo "subshell i = $i"
done

echo "main shell i = $i"
[mute@geek ~]$ ./subshell
subshell i = 1
subshell i = 2
subshell i = 3
main shell i = 0

this is same for exit!

Code:
[mute@geek ~]$ cat subshell
#!/bin/busybox sh

i=0
printf '%s\n' foo bar baz | while read var; do
        exit # from subshell ...
        echo "subshell is alive"
done

echo "main shell is alive"
[mute@geek ~]$ ./subshell
main shell is alive

You do not need to use ls and then read it. The shell can iterate over files:

Code:
check() {
    local file=$1

    # do something with file
}

for file in *.tar; do
    [ -e "$file" ] || continue # if no *.tar file, $file will be '*.tar' so check if file is really existing
    check "$file"
done

This User Gave Thanks to neutronscott For This Post:
vacadepollo
 

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LEARN ABOUT REDHAT

dircolors

DIRCOLORS(1)								FSF							      DIRCOLORS(1)

NAME

       dircolors - color setup for ls

SYNOPSIS

       dircolors [OPTION]... [FILE]

DESCRIPTION

       Output commands to set the LS_COLORS environment variable.

   Determine format of output:
       -b, --sh, --bourne-shell
	      output Bourne shell code to set LS_COLORS

       -c, --csh, --c-shell
	      output C shell code to set LS_COLORS

       -p, --print-database
	      output defaults

       --help display this help and exit

       --version
	      output version information and exit

       If  FILE  is specified, read it to determine which colors to use for which file types and extensions.  Otherwise, a precompiled database is
       used.  For details on the format of these files, run `dircolors --print-database'.

AUTHOR

       Written by H. Peter Anvin.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full documentation for dircolors is maintained as a Texinfo manual.  If the info and dircolors programs are properly installed at your
       site, the command

	      info dircolors

       should give you access to the complete manual.

dircolors (coreutils) 4.5.3					   February 2003						      DIRCOLORS(1)
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