/* * Copyright (c) 1987 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. Neither the name of the University nor the names of its * contributors may 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint char copyright[] = "@(#) Copyright (c) 1987 Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)printenv.c 5.4 (Berkeley) 6/1/90"; #endif /* not lint */ /* * printenv * * Bill Joy, UCB * February, 1979 */ main(argc, argv) int argc; char **argv; { extern char **environ; register char *cp, **ep; register int len; if (argc < 2) { for (ep = environ; *ep; ep++) puts(*ep); exit(0); } len = strlen(*++argv); for (ep = environ; *ep; ep++) if (!strncmp(*ep, *argv, len)) { cp = *ep + len; if (!*cp || *cp == '=') { puts(*cp ? cp + 1 : cp); exit(0); } } exit(1); }