new copyright; att/bsd/shared

[unix-history] / usr / src / usr.bin / printenv / printenv.c

/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#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) %G%";
#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);
}