Artyom Bologov wrote:
In any way, a proper escaping mechanism is really needed here,
Then why POSIX does not require it?
I have no idea. The phrasing in the manpage is not the clearest:
The remainder of the line after the '!' shall be sent to the
command interpreter to be interpreted as a shell command line.
Within the text of that shell command line, the unescaped
character '%' shall be replaced with the remembered pathname
POSIX says the same[1], and I think it is pretty clear: '%' shall be
replaced with the remembered pathname, not with a modified version of the
remembered pathname. Ed is not supposed to modify the remembered pathname so
that it can be later fed to the shell.
[1] http://pubs.opengroup.org/onlinepubs/9799919799/utilities/ed.html
I guess the only portable thing you can do is to only search for words that
are valid file names.
Antonio.
