From: Vince Darley <vincentdarley@sourceforge.net>
Date: Fri, 21 Feb 2003 16:05:41 +0000 (+0000)
Subject: more documentation and better posix error handling
X-Git-Tag: vfs-1-3~38
X-Git-Url: http://privyetmir.co.uk/gitweb.cgi?a=commitdiff_plain;h=9e4586e2c21ea6691fbed1407e49791acb8b8c60;p=tclvfs

more documentation and better posix error handling
---

diff --git a/doc/vfs.n b/doc/vfs.n
index 81f0322..810bdeb 100644
--- a/doc/vfs.n
+++ b/doc/vfs.n
@@ -168,7 +168,10 @@ Return TCL_OK or throw a posix error depending on whether the given
 access mode (which is an integer) is compatible with the file.
 .TP
 \fIcommand\fR \fIcreatedirectory\fR \fIr-r-a\fR
-Create a directory with the given name.
+Create a directory with the given name.  The command can assume
+that all sub-directories in the path exist and are valid, and
+that the actual desired path does not yet exist (Tcl takes care
+of all of that for us).
 .TP
 \fIcommand\fR \fIdeletefile\fR \fIr-r-a\fR
 Delete the given file.
diff --git a/library/mk4vfs.tcl b/library/mk4vfs.tcl
index 52092b7..b792cee 100644
--- a/library/mk4vfs.tcl
+++ b/library/mk4vfs.tcl
@@ -383,8 +383,7 @@ namespace eval mk4vfs {
 	    } else {
 		set row [mk::select $view -count 1 parent $parent name $ele]
 		if { $row == "" } {
-		    return -code error "could not read \"$path\":\
-			    no such file or directory"
+		    vfs::filesystem posixerror $::vfs::posix(ENOENT)
 		}
 		set v::cache($db,$parent,$ele) $row
 		set parent $row
@@ -426,8 +425,7 @@ namespace eval mk4vfs {
 		if { $row != "" } {
 		    set v::cache($db,$parent,$tail) $row
 		} else { 
-		    return -code error "could not read \"$path\":\
-			    no such file or directory"
+		    vfs::filesystem posixerror $::vfs::posix(ENOENT)
 		}
 	    }
 	}
@@ -512,13 +510,15 @@ namespace eval mk4vfs {
 	set view $db.dirs
 
 	set npath {}
+	# This actually does more work than is needed. Tcl's
+	# vfs only requires us to create the last piece, and
+	# Tcl already knows it is not a file.
 	foreach ele $sp {
 	    set npath [file join $npath $ele]
 
-	    if { ![catch {stat $db $npath sb}] } {
+	    if {![catch {stat $db $npath sb}] } {
 		if { $sb(type) != "directory" } {
-		    return -code error "can't create directory \"$npath\":\
-			    file already exists"
+		    vfs::filesystem posixerror $::vfs::posix(EROFS)
 		}
 		set parent [mk::cursor position sb(ino)]
 		continue
@@ -584,7 +584,7 @@ namespace eval mk4vfs {
 		}
 	    } else {
 		if {[llength $contents]} {
-		    return -code error "Non-empty"
+		    vfs::filesystem posixerror $::vfs::posix(ENOTEMPTY)
 		}
 	    }
 	    array unset v::cache \
diff --git a/library/vfsUtils.tcl b/library/vfsUtils.tcl
index f28ecb6..2325d51 100644
--- a/library/vfsUtils.tcl
+++ b/library/vfsUtils.tcl
@@ -361,7 +361,7 @@ set vfs::posix(ESRCH)		3	;# No such process
 set vfs::posix(EINTR)		4	;# Interrupted system call
 set vfs::posix(EIO)		5	;# Input/output error
 set vfs::posix(ENXIO)		6	;# Device not configured
-set vfs::posix(E)2BIG		7	;# Argument list too long
+set vfs::posix(E2BIG)		7	;# Argument list too long
 set vfs::posix(ENOEXEC)		8	;# Exec format error
 set vfs::posix(EBADF)		9	;# Bad file descriptor
 set vfs::posix(ECHILD)		10	;# No child processes