PATCH: 3.1.6-test-3: small zftp function additions

[Peter Stephenson <pws@ibmth.df.unipi.it>]

Here are some small changes for the zftp functions, which I've been using
myself, so they should work.  In addition to the documented changes of
URL-style paths for opening (not yet for getting, though I should really
have done that) and the -c option for zfget, there is also a change allowing
zftp_chpwd to be called other than when a directory really changes without
causing mayhem.

--- Doc/Zsh/zftpsys.yo.bak	Tue Jul 20 12:15:54 1999
+++ Doc/Zsh/zftpsys.yo	Wed Jul 28 16:08:56 1999
@@ -99,6 +99,14 @@
 recorded for later re-opening, either by a tt(zfopen) with no arguments, or
 automatically (see below).  With the option `tt(-1)', no information is
 stored.
+
+Both tt(zfopen) and tt(zfanon) (but not tt(zfparams)) understand URLs of
+the form tt(ftp://)var(host)/var(path...) as meaning to connect to the
+var(host), then change directory to var(path) (which must be a directory,
+not a file).  The `tt(ftp://)' can be omitted; the trailing `tt(/)' is enough
+to trigger recognition of the var(path).  Note prefixes other than
+`tt(ftp:)' are not recognized, and that all characters after the first
+slash beyond tt(host) are significant in var(path).
 )
 findex(zfanon)
 item(tt(zfanon [ -1 ] var(host)))(
@@ -204,11 +212,13 @@
 
 startitem()
 findex(zfget)
-item(tt(zfget [ -Gt ] var(file1) ...))(
+item(tt(zfget [ -Gtc ] var(file1) ...))(
 Retrieve all the listed files var(file1) ... one at a time from the remote
 server.  If a file contains a `tt(/)', the full name is passed to the
 remote server, but the file is stored locally under the name given by the
-part after the final `tt(/)'.
+part after the final `tt(/)'.  The option tt(-c) (cat) forces all files to
+be sent as a single stream to standard output; in this case the tt(-t)
+option has no effect.
 )
 findex(zfuget)
 item(tt(zfuget [ -Gvst ] var(file1) ...))(
--- Functions/Zftp/zfanon.bak	Wed Jul 28 15:58:42 1999
+++ Functions/Zftp/zfanon	Wed Jul 28 15:58:52 1999
@@ -2,7 +2,7 @@
 
 emulate -L zsh
 
-local opt optlist once
+local opt optlist once dir
 
 while [[ $1 = -* ]]; do
   if [[ $1 = - || $1 = -- ]]; then
@@ -61,10 +61,20 @@
   print "Using $EMAIL_ADDR as anonymous FTP password."
 fi
 
+if [[ $1 = */* ]]; then
+  1=${1##ftp://}
+  dir=${1#*/}
+  1=${1%%/*}
+fi
+
 if [[ $once = 1 ]]; then
-  zftp open $1 anonymous $EMAIL_ADDR
+  zftp open $1 anonymous $EMAIL_ADDR || return 1
 else
   zftp params $1 anonymous $EMAIL_ADDR
-  zftp open
+  zftp open || return 1
+fi
+
+if [[ -n $dir ]]; then
+  zfcd $dir
 fi
 # }
--- Functions/Zftp/zfget.bak	Wed Jul 28 15:58:42 1999
+++ Functions/Zftp/zfget	Wed Jul 28 15:58:52 1999
@@ -1,10 +1,16 @@
 # function zfget {
 # Get files from remote server.  Options:
+#   -c   cat: dump files to stdout.
+#          alias zfcat="zfget -c"
+#          zfpage() { zfget -c "$@" | eval $PAGER }
+#        are sensible things to do, but aren't done for you.  Note the
+#        second doesn't work on all OS's.
 #   -G   don't to remote globbing, else do
 #   -t   update the local file times to the same time as the remote.
 #        Currently this only works if you have the `perl' command,
 #        and that perl is version 5 with the standard library.
-#        See the function zfrtime for more gory details.
+#        See the function zfrtime for more gory details.  This has
+#        no effect with the -c option.
 #
 # If the connection is not currently open, try to open it with the current
 # parameters (set by a previous zfopen or zfparams), then close it after
@@ -13,7 +19,7 @@
 
 emulate -L zsh
 
-local loc rem optlist opt nglob remlist time
+local loc rem optlist opt nglob remlist time cat
 integer stat do_close
 
 while [[ $1 == -* ]]; do
@@ -29,6 +35,8 @@
 	 ;;
       t) time=1
 	 ;;
+      c) cat=1
+	 ;;
       *) print option $opt not recognised >&2
 	 ;;
     esac
@@ -48,11 +56,16 @@
   fi
   if (( $#remlist )); then
     for rem in $remlist; do
-      loc=${rem:t}
-      if zftp get $rem >$loc; then
-	[[ $time = 1 ]] && zfrtime $rem $loc
+      if [[ -n $cat ]]; then
+	zftp get $rem
+	stat=$?
       else
-	stat=1
+	loc=${rem:t}
+	if zftp get $rem >$loc; then
+	  [[ $time = 1 ]] && zfrtime $rem $loc
+	else
+	  stat=1
+	fi
       fi
     done
   fi
--- Functions/Zftp/zfopen.bak	Wed Jul 28 15:58:42 1999
+++ Functions/Zftp/zfopen	Wed Jul 28 15:58:52 1999
@@ -7,7 +7,7 @@
 
 emulate -L zsh
 
-local optlist opt once
+local optlist opt once dir
 
 while [[ $1 = -* ]]; do
   if [[ $1 = - || $1 = -- ]]; then
@@ -31,12 +31,22 @@
 # both .netrc and .ncftp/bookmarks .  We could even try saving
 # the info in their for new hosts, like ncftp does.
 
+if [[ $1 = */* ]]; then
+  1=${1##ftp://}
+  dir=${1#*/}
+  1=${1%%/*}
+fi
+
 if [[ $once = 1 ]]; then
-  zftp open $*
+  zftp open $* || return 1
 else
   # set parameters, but only if there was at least a host
   (( $# > 0 )) && zfparams $*
   # now call with no parameters
-  zftp open
+  zftp open || return 1
+fi
+
+if [[ -n $dir ]]; then
+  zfcd $dir
 fi
 # }
--- Functions/Zftp/zftp_chpwd.bak	Wed Jul 28 15:58:42 1999
+++ Functions/Zftp/zftp_chpwd	Wed Jul 28 15:59:36 1999
@@ -1,13 +1,16 @@
 # function zftp_chpwd {
 # You may want to alter chpwd to call this when $ZFTP_USER is set.
 
-# Cancel the filename cache for the current directory.
-zftp_fcache=()
-# ...and also empty the stored directory listing cache.
-# As this function is called when we close the connection, this
-# is the only place we need to do these two things.
-[[ -n $zfcurdir && -f $zfcurdir ]] && rm -f $zfcurdir
-zfotherargs=
+# If the directory really changed...
+if [[ $ZFTP_PWD != $zflastdir ]]; then
+  # Cancel the filename cache for the current directory.
+  zftp_fcache=()
+  # ...and also empty the stored directory listing cache.
+  # As this function is called when we close the connection, this
+  # is the only place we need to do these two things.
+  [[ -n $zfcurdir && -f $zfcurdir ]] && rm -f $zfcurdir
+  zfotherargs=
+fi
 
 if [[ -z $ZFTP_USER ]]; then
   # last call, after an FTP logout

-- 
Peter Stephenson <pws@ibmth.df.unipi.it>       Tel: +39 050 844536
WWW:  http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy