20060303a

1 files changed, 77 insertions, 0 deletions

diff --git a/emu/port/env.c b/emu/port/env.c
new file mode 100644
index 00000000..36ca5636
--- /dev/null
+++ b/emu/port/env.c
@@ -0,0 +1,77 @@
+#include	"dat.h"
+#include	"fns.h"
+#include	"error.h"
+
+Egrp*
+newegrp(void)
+{
+	Egrp	*e;
+
+	e = smalloc(sizeof(Egrp));
+	if (e == nil)
+		error(Enomem);
+	e->r.ref = 1;
+	return e;
+}
+
+void
+closeegrp(Egrp *e)
+{
+	Evalue *el, *nl;
+
+	if(e == nil || decref(&e->r) != 0)
+		return;
+	for (el = e->entries; el != nil; el = nl) {
+		free(el->var);
+		if (el->val)
+			free(el->val);
+		nl = el->next;
+		free(el);
+	}
+	free(e);
+}
+
+void
+egrpcpy(Egrp *to, Egrp *from)
+{
+	Evalue *e, *ne, **last;
+
+	last = &to->entries;
+	qlock(&from->l);
+	for (e = from->entries; e != nil; e = e->next) {
+		ne = smalloc(sizeof(Evalue));
+		ne->var = smalloc(strlen(e->var)+1);
+		strcpy(ne->var, e->var);
+		if (e->val) {
+			ne->val = smalloc(e->len);
+			memmove(ne->val, e->val, e->len);
+			ne->len = e->len;
+		}
+		ne->qid.path = ++to->path;
+		*last = ne;
+		last = &ne->next;
+	}
+	qunlock(&from->l);
+}
+
+void
+ksetenv(char *var, char *val, int conf)
+{
+	Chan *c;
+	char buf[2*KNAMELEN];
+
+	USED(conf);
+	snprint(buf, sizeof(buf), "#e/%s", var);
+	if(waserror())
+		return;
+	c = namec(buf, Acreate, OWRITE, 0600);
+	poperror();
+	if(!waserror()){
+		if(!waserror()){
+			devtab[c->type]->write(c, val, strlen(val), 0);
+			poperror();
+		}
+		poperror();
+	}
+	cclose(c);
+}