Return to users.c CVS log

Up to [CSRG BSD Unix] / 43BSD / ucb

Annotation of 43BSD/ucb/users.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 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) 1980 Regents of the University of California.\n\
        !            10:  All rights reserved.\n";
        !            11: #endif not lint
        !            12: 
        !            13: #ifndef lint
        !            14: static char sccsid[] = "@(#)users.c    5.2 (Berkeley) 11/15/85";
        !            15: #endif not lint
        !            16: 
        !            17: /*
        !            18:  * users
        !            19:  */
        !            20: char   *malloc();
        !            21: 
        !            22: #include <stdio.h>
        !            23: #include <utmp.h>
        !            24: 
        !            25: #define NMAX sizeof(utmp.ut_name)
        !            26: #define LMAX sizeof(utmp.ut_line)
        !            27: 
        !            28: struct utmp utmp;
        !            29: 
        !            30: main(argc, argv)
        !            31: char **argv;
        !            32: {
        !            33:        register char *tp, *s;
        !            34:        register FILE *fi;
        !            35: 
        !            36:        s = "/etc/utmp";
        !            37:        if(argc == 2)
        !            38:                s = argv[1];
        !            39:        if ((fi = fopen(s, "r")) == NULL) {
        !            40:                perror(s);
        !            41:                exit(1);
        !            42:        }
        !            43:        while (fread((char *)&utmp, sizeof(utmp), 1, fi) == 1) {
        !            44:                if(utmp.ut_name[0] == '\0')
        !            45:                        continue;
        !            46:                putline();
        !            47:        }
        !            48:        summary();
        !            49: }
        !            50: 
        !            51: char   *names[128];
        !            52: char   **namp = names;
        !            53: putline()
        !            54: {
        !            55:        char temp[NMAX+1];
        !            56:        strncpy(temp, utmp.ut_name, NMAX);
        !            57:        temp[NMAX] = 0;
        !            58:        *namp = malloc(strlen(temp) + 1);
        !            59:        strcpy(*namp++, temp);
        !            60: }
        !            61: 
        !            62: scmp(p, q)
        !            63: char **p, **q;
        !            64: {
        !            65:        return(strcmp(*p, *q));
        !            66: }
        !            67: summary()
        !            68: {
        !            69:        register char **p;
        !            70: 
        !            71:        qsort(names, namp - names, sizeof names[0], scmp);
        !            72:        for (p=names; p < namp; p++) {
        !            73:                if (p != names)
        !            74:                        putchar(' ');
        !            75:                fputs(*p, stdout);
        !            76:        }
        !            77:        if (namp != names)              /* at least one user */
        !            78:                putchar('\n');
        !            79: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.