On 15 Jan 1998, Karl M. Hegbloom wrote:
> Bash-2.0 `help exec' reads:
>
> exec: exec [-cl] [-a name] file [redirection ...]
> Exec FILE, replacing this shell with the specified program.
> If FILE is not specified, the redirections take effect in this
> shell. If the first argument is `-l', then place a dash in the
> zeroth arg passed to FILE, as login does. If the `-c' option
> is supplied, FILE is executed with a null environment. The `-a'
> option means to make set argv[0] of the executed process to NAME.
> If the file cannot be executed and the shell is not interactive,
> then the shell exits, unless the shell option `execfail' is set.
>
> ... is the `-a' a POSIX feature?
>From the man page for `sh' on a SunOS 5.5 box:
exec [ argument ... ]
The command specified by the arguments is executed in
place of this shell without creating a new process.
Input/output arguments may appear and, if no other
arguments are given, cause the shell input/output to be
modified.
So, I don't think any of the flags to `exec' are POSIX features.
Remco
