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Annotation of 43BSD/bin/hostid.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: char copyright[] =
        !             9: "@(#) Copyright (c) 1983 Regents of the University of California.\n\
        !            10:  All rights reserved.\n";
        !            11: #endif not lint
        !            12: 
        !            13: #ifndef lint
        !            14: static char sccsid[] = "@(#)hostid.c   5.4 (Berkeley) 5/19/86";
        !            15: #endif not lint
        !            16: 
        !            17: #include <sys/types.h>
        !            18: #include <stdio.h>
        !            19: #include <ctype.h>
        !            20: #include <netdb.h>
        !            21: 
        !            22: extern char *index();
        !            23: extern unsigned long inet_addr();
        !            24: extern long gethostid();
        !            25: 
        !            26: main(argc, argv)
        !            27:        int argc;
        !            28:        char **argv;
        !            29: {
        !            30:        register char *id;
        !            31:        u_long addr;
        !            32:        long hostid;
        !            33:        struct hostent *hp;
        !            34: 
        !            35:        if (argc < 2) {
        !            36:                printf("%#x\n", gethostid());
        !            37:                exit(0);
        !            38:        }
        !            39: 
        !            40:        id = argv[1];
        !            41:        if (hp = gethostbyname(id)) {
        !            42:                bcopy(hp->h_addr, &addr, sizeof(addr));
        !            43:                hostid = addr;
        !            44:        } else if (index(id, '.')) {
        !            45:                if ((hostid = inet_addr(id)) == -1)
        !            46:                        goto usage;
        !            47:        } else {
        !            48:                if (id[0] == '0' && (id[1] == 'x' || id[1] == 'X'))
        !            49:                        id += 2;
        !            50:                if (sscanf(id, "%x", &hostid) != 1) {
        !            51: usage:
        !            52:                        fprintf(stderr,
        !            53:                            "usage: %s [hexnum or internet address]\n",
        !            54:                            argv[0]);
        !            55:                        exit(1);
        !            56:                }
        !            57:        }
        !            58: 
        !            59:        if (sethostid(hostid) < 0) {
        !            60:                perror("sethostid");
        !            61:                exit(1);
        !            62:        }
        !            63: 
        !            64:        exit(0);
        !            65: }

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