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Full Discussion: Replace string works on command-line but fails when run from shell script
Top Forums Shell Programming and Scripting Replace string works on command-line but fails when run from shell script Post 303038488 by wisecracker on Wednesday 4th of September 2019 06:26:05 AM
Old 09-04-2019
This uses '/usr/bin/printf' which is fully POSIX compliant.
Just use your 'printf':
Code:
#!/usr/local/bin/dash
# check.sh
# Use /usr/bin/printf as that is fully POSIX compliant.
# OSX 10.14.3...
# $1 is '/fin/app/01/scripts\\n/fin/app/01/sql'

text=$( /usr/bin/printf "%b" $( /usr/bin/printf "%b" $1 ) )
text=$( /usr/bin/printf "%b " ${text} )

# Without trailing newline:
# /usr/bin/printf "%s" "${text%?}" > /tmp/check.row

# With trailing newline:
/usr/bin/printf "%s\n" "${text%?}" > /tmp/check.row

# Check results...
echo ""
cat /tmp/check.row
echo ""
hexdump -C /tmp/check.row
echo ""

Results using the same machine as before.
Code:
Last login: Wed Sep  4 10:27:46 on ttys000
AMIGA:amiga~> cd Desktop/code/Shell
AMIGA:amiga~/Desktop/code/Shell> ./check.sh '/fin/app/01/scripts\\n/fin/app/01/sql'

/fin/app/01/scripts /fin/app/01/sql

00000000  2f 66 69 6e 2f 61 70 70  2f 30 31 2f 73 63 72 69  |/fin/app/01/scri|
00000010  70 74 73 20 2f 66 69 6e  2f 61 70 70 2f 30 31 2f  |pts /fin/app/01/|
00000020  73 71 6c 0a                                       |sql.|
00000024

AMIGA:amiga~/Desktop/code/Shell> _

Last edited by wisecracker; 09-04-2019 at 07:34 AM..
This User Gave Thanks to wisecracker For This Post:
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LEARN ABOUT SUNOS

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/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/pfcsh,  /usr/bin/pfksh,
       /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.

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

FILES

       /etc/shells	       lists shells on system

SEE ALSO

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

SunOS 5.10							    4 Jun 2001								 shells(4)
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