oamuser/group/groupadd.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * Copyright (c) 2013 RackTop Systems.
 */

#include    <sys/types.h>
#include    <sys/param.h>
#include    <stdio.h>
#include    <stdlib.h>
#include    <ctype.h>
#include    <limits.h>
#include    <userdefs.h>
#include    <users.h>
#include    <errno.h>
#include    <libcmdutils.h>
#include    "messages.h"

extern int errmsg();
extern int valid_gid(), add_group();

/*
 *  groupadd [-g gid [-o]] group
 *
 *  This command adds new groups to the system.  Arguments are:
 *
 *  gid - a gid_t less than MAXUID
 *  group - a string of printable characters excluding colon(:) and less
 *      than MAXGLEN characters long.
 */

char *cmdname = "groupadd";

int
main(int argc, char *argv[])
{
    int ch;             /* return from getopt */
    gid_t gid;          /* group id */
    int oflag = 0;  /* flags */
    int rc;
    char *gidstr = NULL;    /* gid from command line */
    char *grpname;          /* group name from command line */
    int warning;

    while ((ch = getopt(argc, argv, "g:o")) != EOF)
        switch (ch) {
            case 'g':
                gidstr = optarg;
                break;
            case 'o':
                oflag++;
                break;
            case '?':
                errmsg(M_AUSAGE);
                exit(EX_SYNTAX);
        }

    if ((oflag && !gidstr) || optind != argc - 1) {
        errmsg(M_AUSAGE);
        exit(EX_SYNTAX);
    }

    grpname = argv[optind];

    switch (valid_gname(grpname, NULL, &warning)) {
    case INVALID:
        errmsg(M_GRP_INVALID, grpname);
        exit(EX_BADARG);
        /*NOTREACHED*/
    case NOTUNIQUE:
        errmsg(M_GRP_USED, grpname);
        exit(EX_NAME_EXISTS);
        /*NOTREACHED*/
    }
    if (warning)
        warningmsg(warning, grpname);

    if (gidstr) {
        /* Given a gid string - validate it */
        char *ptr;

        errno = 0;
        gid = (gid_t)strtol(gidstr, &ptr, 10);

        if (*ptr || errno == ERANGE) {
            errmsg(M_GID_INVALID, gidstr);
            exit(EX_BADARG);
        }

        switch (valid_gid(gid, NULL)) {
        case RESERVED:
            errmsg(M_RESERVED, gid);
            break;

        case NOTUNIQUE:
            if (!oflag) {
                errmsg(M_GRP_USED, gidstr);
                exit(EX_ID_EXISTS);
            }
            break;

        case INVALID:
            errmsg(M_GID_INVALID, gidstr);
            exit(EX_BADARG);

        case TOOBIG:
            errmsg(M_TOOBIG, gid);
            exit(EX_BADARG);

        }

    } else {

        if (findnextgid(DEFRID+1, MAXUID, &gid) != 0) {
            errmsg(M_GID_INVALID, "default id");
            exit(EX_ID_EXISTS);
        }

    }

    if ((rc = add_group(grpname, gid)) != EX_SUCCESS)
        errmsg(M_UPDATE, "created");

    return (rc);
}