Dot sourcing differences in ksh, AIX vs Linux vs Solaris Post: 302887296

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Top Forums UNIX for Advanced & Expert Users Dot sourcing differences in ksh, AIX vs Linux vs Solaris Post 302887296 by charles_n_may on Thursday 6th of February 2014 04:57:38 PM

02-06-2014

Registered User

I want the behavior given by using the function keyword as it is indeed different from that using the parentheses. I use the difference (ksh functions defined with function have their own function environment and my code relies heavily on that isolation, particularly for logging the name of the function, $0, being called), and I am not really interested in bash compatibility.

However I did notice that if I use corrected bash syntax I get basic compatibility with the Solaris test (regardless of whether the curly brace is on the same line as the parens):

Code:

$ cat MyFun
#! /bin/ksh
print -- "In file MyFun, before def of function MyFun. PID=$$, system=$( uname -rsv )"
MyFun() {
print -- "In function MyFun. PID=$$, system=$( uname -rsv )"
return $(( $# % 128 )) #number of arguments mod 128
}
print -- "In file MyFun, after def of function MyFun. PID=$$, system=$( uname -rsv )"

Running the above in Linux:

Code:

$ . MyFun
In file MyFun, before def of function MyFun. PID=37604, system=Linux 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011
In file MyFun, after def of function MyFun. PID=37604, system=Linux 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011
$ MyFun
In function MyFun. PID=37604, system=Linux 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011
$ . MyFun
In file MyFun, before def of function MyFun. PID=37604, system=Linux 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011
In file MyFun, after def of function MyFun. PID=37604, system=Linux 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011

The above still isn't acceptable because using the bash sytax, the function's name is not stored in $0 inside the function body when it executes.

Last edited by charles_n_may; 02-06-2014 at 06:16 PM..

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grub-render-label

GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

       grub-render-label - generate a .disk_label for Apple Macs.

SYNOPSIS

       grub-render-label [OPTION...] [OPTIONS]

DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
              use COLOR for background

       -c, --color=COLOR
              use COLOR for text

       -f, --font=FILE
              use FILE as font (PF2).

       -i, --input=FILE
              read text from FILE.

       -o, --output=FILE
              set output filename. Default is STDOUT

       -t, --text=STRING
              set the label to render

       -v, --verbose
              print verbose messages.

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

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

SEE ALSO

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

              info grub-render-label

       should give you access to the complete manual.

grub-render-label (GRUB) 2.02-2ubuntu8.3                             July 2018                                                GRUB-RENDER-LABEL(1)

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