2 files changed, 12 insertions, 0 deletions
diff --git a/man/vis.1 b/man/vis.1
index 6ac8474..6054317 100644
--- a/man/vis.1
+++ b/man/vis.1
@@ -520,6 +520,12 @@ or
 if the shell command is omitted, the last shell command
 .Pq "of any type"
 is substituted.
+Unless the file being edited is unnamed, all these external commands
+can refer to its absolute path and file name through the
+.Ic $vis_filepath
+and
+.Ic $vis_filename
+environment variables.
 .Ss Loops and conditionals
 .Bl -tag -width indent
 .It Ic x/regexp/ Bq command
diff --git a/vis.c b/vis.c
index 8a26415..0f596ee 100644
--- a/vis.c
+++ b/vis.c
@@ -1548,6 +1548,12 @@ int vis_pipe(Vis *vis, File *file, Filerange *range, const char *argv[],
 		close(perr[1]);
 		close(null);
 
+		if (file->name) {
+			char *name = strrchr(file->name, '/');
+			setenv("vis_filepath", file->name, 1);
+			setenv("vis_filename", name ? name+1 : file->name, 1);
+		}
+
 		if (!argv[1])
 			execlp(vis->shell, vis->shell, "-c", argv[0], (char*)NULL);
 		else