set $samfile during external commands
diff --git a/src/cmd/sam/shell.c b/src/cmd/sam/shell.c
index ee30e5d..ba69be6 100644
--- a/src/cmd/sam/shell.c
+++ b/src/cmd/sam/shell.c
@@ -8,6 +8,14 @@
Buffer plan9buf;
void checkerrs(void);
+void
+setname(File *f)
+{
+ char buf[1024];
+ snprint(buf, sizeof buf, "%.*S", f->name.n, f->name.s);
+ putenv("samfile", buf);
+}
+
int
plan9(File *f, int type, String *s, int nest)
{
@@ -31,6 +39,7 @@
if(type=='|')
snarf(f, addr.r.p1, addr.r.p2, &plan9buf, 1);
if((pid=fork()) == 0){
+ setname(f);
if(downloaded){ /* also put nasty fd's into errfile */
fd = create(errfile, 1, 0666L);
if(fd < 0)
