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Annotation of 43BSDTahoe/ucb/printenv.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: char copyright[] =
        !            20: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
        !            21:  All rights reserved.\n";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #ifndef lint
        !            25: static char sccsid[] = "@(#)printenv.c 5.3 (Berkeley) 6/29/88";
        !            26: #endif /* not lint */
        !            27: 
        !            28: /*
        !            29:  * printenv
        !            30:  *
        !            31:  * Bill Joy, UCB
        !            32:  * February, 1979
        !            33:  */
        !            34: main(argc, argv)
        !            35:        int argc;
        !            36:        char **argv;
        !            37: {
        !            38:        extern char **environ;
        !            39:        register char *cp, **ep;
        !            40:        register int len;
        !            41: 
        !            42:        if (argc < 2) {
        !            43:                for (ep = environ; *ep; ep++)
        !            44:                        puts(*ep);
        !            45:                exit(0);
        !            46:        }
        !            47:        len = strlen(*++argv);
        !            48:        for (ep = environ; *ep; ep++)
        !            49:                if (!strncmp(*ep, *argv, len)) {
        !            50:                        cp = *ep + len;
        !            51:                        if (!*cp || *cp == '=') {
        !            52:                                puts(*cp ? cp + 1 : cp);
        !            53:                                exit(0);
        !            54:                        }
        !            55:                }
        !            56:        exit(1);
        !            57: }

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