-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to [EMAIL PROTECTED] on 10/28/2006 10:19 PM: >> That's because `` and $() have different syntax, as required by POSIX. >> You should just do $(basename "$f1"), rather than $(basename \"$f1\"). >> > > That's crazy! > > You have nested double quotes which don't need escaping?!
Correct. Go read the POSIX spec: http://www.opengroup.org/onlinepubs/009695399/idx/shell.html In particular, "With the $( command) form, all characters following the open parenthesis to the matching closing parenthesis constitute the command. Any valid shell script can be used for command, except a script consisting solely of redirections which produces unspecified results." $() was invented because it is much easier to write normal shell scripts, without worrying about the extra escapes that are required by ``. > > Let me think aloud: > > The first thing one encounters left-to-right is a double-quote. > So, logic says that the quoted string is terminated by matching > double-quote. No, when encountering ", one follows certain rules while looking for the closing quote, and one of those rules is: "The input characters within the quoted string that are also enclosed between "$(" and the matching ')' shall not be affected by the double-quotes, but rather shall define that command whose output replaces the "$(...)" when the word is expanded. The tokenizing rules in Token Recognition , not including the alias substitutions in Alias Substitution , shall be applied recursively to find the matching ')'." > Looks like POSIX and commonsense are two different things. Like it or not, POSIX standardized the original bourne shell `` behavior, as well as the ksh $() behavior, and the two behaviors are different. Get used to it. - -- Life is short - so eat dessert first! Eric Blake [EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.1 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFRDRJ84KuGfSFAYARAmTtAKCcjQBFCmg9mbLbCaiSM7FESgYiogCgtot8 +OwN8s0+jojCpvrcrugWiHw= =KOED -----END PGP SIGNATURE----- _______________________________________________ Bug-bash mailing list Bug-bash@gnu.org http://lists.gnu.org/mailman/listinfo/bug-bash
