date and time created 88/09/27 13:52:30 by bostic

SCCS-vsn: usr.bin/env/env.c 5.1

diff --git a/usr/src/usr.bin/env/env.c b/usr/src/usr.bin/env/env.c
new file mode 100644 (file)
index 0000000..64b4ab2
--- /dev/null
+++ b/usr/src/usr.bin/env/env.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 1988 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1988 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)env.c      5.1 (Berkeley) %G%";
+#endif /* not lint */
+
+#include <stdio.h>
+#include <strings.h>
+
+main(argc, argv)
+       int argc;
+       char **argv;
+{
+       extern char **environ;
+       extern int errno, optind;
+       register char **ep, *p;
+       char *cleanenv[1];
+       int ch;
+
+       while ((ch = getopt(argc, argv, "-")) != EOF)
+               switch((char)ch) {
+               case '-':
+                       environ = cleanenv;
+                       cleanenv[0] = NULL;
+                       break;
+               case '?':
+               default:
+                       (void)fprintf(stderr,
+                           "usage: env [-] [name=value ...] [command]\n");
+                       exit(1);
+               }
+       for (argv += optind; *argv && (p = index(*argv, '=')); ++argv)
+               (void)setenv(*argv, ++p, 1);
+       if (*argv) {
+               execvp(*argv, argv);
+               (void)fprintf(stderr, "env: %s: %s\n", *argv,
+                   strerror(errno));
+               exit(1);
+       }
+       for (ep = environ; *ep; ep++)
+               (void)printf("%s\n", *ep);
+       exit(0);
+}