I am a rookie regarding shell script programming, YET!! :-)
Hence, I have choosen a problem from my bad side of life (my job) and I wil try to solve it by using a shell script and get knowledge concerning shell script programming.
Question: As you can see I have already figured out how to use a function, variables, different standard funtions (if, loops,etc). But I struggeld by using the printf function in order to add blanks to string. If the string which I pass into the function is longer than 40 digits then the printf function has to shorten string to 40 digits. This function works perfectly but if the string is shorter than 40 digits then the printf function has to add blanks until the string has a lenght of 40 digits but this part of my shell script doesn't work !!! The function adds only ONE blank
Code:
#!/bin/bash
fkt_auffuellen()
{
case $1 in
"C")
if [ ${#2} -eq $3 ]; then
value=$2
elif [ ${#2} -lt $3 ]; then
value="$(printf "%-$3s" $2)"
else
value="$(printf "%.$3s" $2)"
fi;;
"N")
;;
"D")
;;
esac
}
vorg_nr_t=C
vorg_nr="AUFTRAG005-010010"
vorg_nr_l=40
fkt_auffuellen $vorg_nr_t $vorg_nr $vorg_nr_l
echo $value
if anyone can give an advice it would be great!!!!
Thanks in advance and cold but sunny greetings form BERLIN Area!
Noobie1995
P.S.: I am so sorry for my english it has been a while..........
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LEARN ABOUT REDHAT
printf
PRINTF(1) FSF PRINTF(1)NAME
printf - format and print data
SYNOPSIS
printf FORMAT [ARGUMENT]...
printf OPTION
DESCRIPTION
NOTE: your shell may have its own version of printf which will supercede the version described here. Please refer to your shell's documen-
tation for details about the options it supports.
Print ARGUMENT(s) according to FORMAT.
--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
NNN character with octal value NNN (0 to 3 digits)
\ backslash
a alert (BEL)
backspace
c produce no further output
f form feed
new line
carriage return
horizontal tab
v vertical tab
xNNN byte with hexadecimal value NNN (1 to 3 digits)
uNNNN character with hexadecimal value NNNN (4 digits)
UNNNNNNNN
character with hexadecimal value NNNNNNNN (8 digits)
%% a single %
%b ARGUMENT as a string with `' escapes interpreted
and all C format specifications ending with one of diouxXfeEgGcs, with ARGUMENTs converted to proper type first. Variable widths are han-
dled.
AUTHOR
Written by David MacKenzie.
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 printf is maintained as a Texinfo manual. If the info and printf programs are properly installed at your site,
the command
info printf
should give you access to the complete manual.
GNU coreutils 4.5.3 February 2003 PRINTF(1)
03-02-2013
ERP - MES Interface - several function
!!! The function adds only ONE blank