cmd/getent/dogetserv.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
 */
#ident  "%Z%%M% %I% %E% SMI"

/*
 * Copyright (c) 1994, by Sun Microsystems, Inc.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

#include <netdb.h>
#include "getent.h"

static int
putservent(const struct servent *sp, FILE *fp)
{
    char **p;
    int rc = 0;

    if (sp == NULL) {
        return (1);
    }

    if (fprintf(fp, "%-20s %d/%s",
            sp->s_name, ntohs(sp->s_port), sp->s_proto) == EOF)
        rc = 1;
    for (p = sp->s_aliases; *p != 0; p++) {
        if (fprintf(fp, " %s", *p) == EOF)
            rc = 1;
    }
    if (putc('\n', fp) == EOF)
        rc = 1;
    return (rc);
}

/*
 * getservbyname/addr - get entries from service database
 * Accepts arguments as:
 *  port/protocol
 *  port
 *  name/protocol
 *  name
 */
int
dogetserv(const char **list)
{
    struct servent *sp;
    int rc = EXC_SUCCESS;

    if (list == NULL || *list == NULL) {
        while ((sp = getservent()) != NULL)
            (void) putservent(sp, stdout);
    } else {
        for (; *list != NULL; list++) {
            int port;
            char key[BUFSIZ];
            const char *protocol = NULL;
            char *cp;

            /* Copy string to avoiding modifying the argument */
            (void) strncpy(key, *list, sizeof (key));
            key[sizeof (key) - 1] = NULL;
            /* Split at a '/' to extract protocol number */
            if ((cp = strchr(key, '/')) != NULL) {
                *cp = NULL;
                protocol = cp + 1;
            }
            port = htons(atoi(key));
            if (port != 0)
                sp = getservbyport(port, protocol);
            else
                sp = getservbyname(key, protocol);
            if (sp == NULL)
                rc = EXC_NAME_NOT_FOUND;
            else
                (void) putservent(sp, stdout);
        }
    }

    return (rc);
}