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Newsgroups: comp.lang.java.programmer
Date: Fri, 11 Jan 2013 11:44:03 -0800 (PST)
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Subject: Re: problem with multiword args and Runtime.exec()
From: FredK <fred.l.kleinschmidt@gmail.com>
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Xref: csiph.com comp.lang.java.programmer:21335

On Friday, January 11, 2013 11:41:00 AM UTC-8, FredK wrote:
> On Friday, January 11, 2013 8:33:39 AM UTC-8, Aryeh M. Friedman wrote:
>=20
> > No matter what version of Runtime.exec I call I can not make a arg that=
 has multiple words in it (*NOT* multiple args but a single one) for exampl=
e if I need to issue the following command in unix I can not find a way to =
do the stuff in "'s as a single arg [the called program requires this... i.=
e. it *MUST NOT* be treated as different elements of String[] args if it wa=
s a java program]):
>=20
> >=20
>=20
> >=20
>=20
> >=20
>=20
> > rdiff-backup --remote-schema "ssh -C -p9222 %s rdiff-backup --server" u=
sername@remoteserver::/path_to/filestobackup /path_to/backedupfiles
>=20
>=20
>=20
> Your program gets the quotes string as a single argument.
>=20
> If you want to pass that string as a single argument to something
>=20
> like system(), you have to ensure that there are quotes around the
>=20
> multi-word argument.
>=20
>=20
>=20
> For example, assume arg1 contains the multiword value.
>=20
> You cannot just say:
>=20
>    sprintf( buffer, "ls %s", arg1 );
>=20
>    system( buffer );
>=20
>=20
>=20
> you have to use
>=20
>    sprintf( buffer, "ls '%s'", arg1 );
>=20
>    system( buffer );
>=20
>=20
>=20
>=20
>=20
> --=20
>=20
> Fred K

Oops - answered it as "C".
However, the same concept goes for Java
  String buffer =3D "ls '" + arg1 + "'";