1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1988, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)env.c 8.1 (Berkeley) 06/06/93"; 16 #endif /* not lint */ 17 18 #include <stdio.h> 19 #include <string.h> 20 21 main(argc, argv) 22 int argc; 23 char **argv; 24 { 25 extern char **environ; 26 extern int errno, optind; 27 register char **ep, *p; 28 char *cleanenv[1]; 29 int ch; 30 31 while ((ch = getopt(argc, argv, "-")) != EOF) 32 switch((char)ch) { 33 case '-': 34 environ = cleanenv; 35 cleanenv[0] = NULL; 36 break; 37 case '?': 38 default: 39 (void)fprintf(stderr, 40 "usage: env [-] [name=value ...] [command]\n"); 41 exit(1); 42 } 43 for (argv += optind; *argv && (p = index(*argv, '=')); ++argv) 44 (void)setenv(*argv, ++p, 1); 45 if (*argv) { 46 execvp(*argv, argv); 47 (void)fprintf(stderr, "env: %s: %s\n", *argv, 48 strerror(errno)); 49 exit(1); 50 } 51 for (ep = environ; *ep; ep++) 52 (void)printf("%s\n", *ep); 53 exit(0); 54 } 55