Bash script deleting my files, and editing files in subdirectories question Post: 302887120

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Top Forums Shell Programming and Scripting Bash script deleting my files, and editing files in subdirectories question Post 302887120 by Chubler_XL on Wednesday 5th of February 2014 06:37:58 PM

02-05-2014

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continue just resumes at the next iteration of the enclosing for loop. In this particular code that means stop processing the current file and start processing the next file.

The current code is less than ideal as it will rename existing renamed files and skip files.

see below:

Code:

$ touch abc_{0000..0003} more/img_{0000..0003} file{000..002}.jpg
$ ls
abc_0000  abc_0001  abc_0002  abc_0003  file000.jpg  file001.jpg  file002.jpg  more  script
$ ./script file jpg
./abc_0002 -> file003.jpg
./abc_0003 -> file004.jpg
./file000.jpg -> file005.jpg
./file001.jpg -> file006.jpg
./file002.jpg -> file007.jpg
./more/img_0000 -> file008.jpg
./more/img_0001 -> file009.jpg
./more/img_0002 -> file010.jpg
./more/img_0003 -> file011.jpg
$ ls
abc_0000  file003.jpg  file005.jpg  file007.jpg  file009.jpg  file011.jpg  script
abc_0001  file004.jpg  file006.jpg  file008.jpg  file010.jpg  more

This slight update should be a little safer.

Code:

(( $# == 2 )) || {
        printf 'Usage: %s <prefix> <ext>\n' "$0"
        exit 1
}

prefix=$1
type=$2
number=1

find . -type f -print | while read file; do

        # skip already processed files
        [[ "$file" = ./$prefix[0-9][0-9][0-9].$type ]] && continue

        # skip executable files (eg this script)
        [ -x "$file" ] && continue

        # find next unused sequence
        while true
        do
            printf -v new '%s%03d.%s' "$prefix" $((++number)) "$type"
            [ -f "$new" ] || break
        done

        mv "$file" "$new"
        echo "$file -> $new"

done

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rbash

RBASH(1)						      General Commands Manual							  RBASH(1)

NAME

       rbash - restricted bash, see bash(1)

RESTRICTED SHELL

       If  bash  is  started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted.  A restricted shell is
       used to set up an environment more controlled than the standard shell.  It behaves identically to bash with the exception that the  follow-
       ing are disallowed or not performed:

       o      changing directories with cd

       o      setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV

       o      specifying command names containing /

       o      specifying a filename containing a / as an argument to the .  builtin command

       o      specifying a filename containing a slash as an argument to the -p option to the hash builtin command

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment at startup

       o      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       o      using the exec builtin command to replace the shell with another command

       o      adding or deleting builtin commands with the -f and -d options to the enable builtin command

       o      using the enable builtin command to enable disabled shell builtins

       o      specifying the -p option to the command builtin command

       o      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.

SEE ALSO

       bash(1)

GNU Bash-4.0							    2004 Apr 20 							  RBASH(1)