1 files changed, 49 insertions, 0 deletions
diff --git a/util/sbase/env.c b/util/sbase/env.c
new file mode 100644
index 00000000..5d7e8a55
--- /dev/null
+++ b/util/sbase/env.c
@@ -0,0 +1,49 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "util.h"
+
+extern char **environ;
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-i] [-u var] ... [var=value] ... [cmd [arg ...]]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int savederrno;
+
+	ARGBEGIN {
+	case 'i':
+		*environ = NULL;
+		break;
+	case 'u':
+		if (unsetenv(EARGF(usage())) < 0)
+			eprintf("unsetenv:");
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	for (; *argv && strchr(*argv, '='); argc--, argv++)
+		putenv(*argv);
+
+	if (*argv) {
+		execvp(*argv, argv);
+		savederrno = errno;
+		weprintf("execvp %s:", *argv);
+		_exit(126 + (savederrno == ENOENT));
+	}
+
+	for (; *environ; environ++)
+		puts(*environ);
+
+	return fshut(stdout, "<stdout>");
+}