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Full Discussion: use several inputs as arguments in my script
Top Forums Shell Programming and Scripting use several inputs as arguments in my script Post 302259532 by Christoph Spohr on Tuesday 18th of November 2008 11:00:30 AM
Old 11-18-2008
You can test, if the script was called with an argument:

[[ -z "$@" ]] && printf "No input\n" || printf "Input: %q\n" "$@"

Which means: if the length of the arguments ( $@) is zero (-z) then print "No input" else print the string in escaped form. I don't not, what you want to achieve, but if you try to escape strings, check the %q option of printf.

If you call the testscript this way:

testscript "h's m"

it will give you:

Input: h\'s\ m
 

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LEARN ABOUT XFREE86

printf

PRINTF(1)                                                          User Commands                                                         PRINTF(1)

NAME

       printf - format and print data

SYNOPSIS

       printf FORMAT [ARGUMENT]...
       printf OPTION

DESCRIPTION

       Print ARGUMENT(s) according to FORMAT, or execute according to OPTION:

       --help display this help and exit

       --version
              output version information and exit

       FORMAT controls the output as in C printf.  Interpreted sequences are:

       "     double quote

       \     backslash

       a     alert (BEL)

            backspace

       c     produce no further output

       e     escape

       f     form feed

       
     new line

       
     carriage return

       	     horizontal tab

       v     vertical tab

       NNN   byte with octal value NNN (1 to 3 digits)

       xHH   byte with hexadecimal value HH (1 to 2 digits)

       uHHHH Unicode (ISO/IEC 10646) character with hex value HHHH (4 digits)

       UHHHHHHHH
              Unicode character with hex value HHHHHHHH (8 digits)

       %%     a single %

       %b     ARGUMENT as a string with '' escapes interpreted, except that octal escapes are of the form  or NNN

       %q     ARGUMENT  is  printed  in  a format that can be reused as shell input, escaping non-printable characters with the proposed POSIX $''
              syntax.

       and all C format specifications ending with one of diouxXfeEgGcs, with ARGUMENTs converted to proper type first.  Variable widths are  han-
       dled.

       NOTE:  your  shell  may  have its own version of printf, which usually supersedes the version described here.  Please refer to your shell's
       documentation for details about the options it supports.

AUTHOR

       Written by David MacKenzie.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report printf translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       printf(3)

       Full documentation at: <http://www.gnu.org/software/coreutils/printf>
       or available locally via: info '(coreutils) printf invocation'

GNU coreutils 8.28                                                 January 2018                                                          PRINTF(1)
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