illumos gate

On a fresh OpenIndiana installation
(The Illumos Project SunOS 5.11 illumos-7d1eae8c55 December 2018)

the mktemp(1) command seems sensitive to the order of its -p and -t options
and may ignore the existence of "-p DIRECTORY" option, using /tmp rather
than DIRECTORY. The error is strange, as it only occurs if mktemp is invoked
within a shell script, but not from the command-line in a terminal window.
The error also requires that mktemp is invoked without absolute path.

Create a file named SHOWBUG containing the following code

#! /bin/sh

# to know the current shell
echo $SHELL

# to know which mktemp is invoked
which mktemp

# to create a working directory
mkdir -p "$HOME/tmp" 

mktemp -d -p "$HOME/tmp" -t "file.XXXX" 
mktemp -d -t -p "$HOME/tmp" "file.XXXX" 

/bin/mktemp -d -p "$HOME/tmp" -t "file.XXXX" 
/bin/mktemp -d -t -p "$HOME/tmp" "file.XXXX" 

/usr/bin/mktemp -d -p "$HOME/tmp" -t "file.XXXX" 
/usr/bin/mktemp -d -t -p "$HOME/tmp" "file.XXXX" 

Then, type the commands

$ chmod a+rx SHOWBUG
 $ ./SHOWBUG

which produces output such as:

/bin/bash
/usr/bin/mktemp
/tmp/file.3k9r
/export/home/cadp/tmp/file.1u8s
/export/home/cadp/tmp/file.IgXR
/export/home/cadp/tmp/file.KoXR
/export/home/cadp/tmp/file.MwXR
/export/home/cadp/tmp/file.NUWR

The 3rd line is clearly incorrect.

The problem does not seem to occur if the commands
are typed in a terminal windows rather than being put
in the SHOWBUG file.