smbsrv/fksmbd/fksmbd_shr.c

/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
 */

/*
 * Replace the smb_shr_load() function in libmlsvc, because
 * fksmbd doesn't want the real shares known by libshare,
 * instead preferring its own (fake) list of shares.
 */

#include <sys/types.h>


#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <syslog.h>
#include <libshare.h>
#include <unistd.h>
#include <note.h>

#include <smbsrv/libsmb.h>
#include <smbsrv/libsmbns.h>
#include <smbsrv/libmlsvc.h>
#include <smbsrv/smb_share.h>
#include <smbsrv/smb.h>

static void
new_share(char *name, char *path, char *comment, int flags)
{
    smb_share_t si;

    bzero(&si, sizeof (si));
    (void) strlcpy(si.shr_name, name, MAXNAMELEN);
    (void) strlcpy(si.shr_path, path, MAXPATHLEN);
    (void) strlcpy(si.shr_cmnt, comment, SMB_SHARE_CMNT_MAX);
    si.shr_flags = flags;
    if (smb_shr_add(&si) != 0) {
        syslog(LOG_ERR, "failed to add test share: %s",
            si.shr_name);
    }
}

/*
 * This function loads a list of shares from a text file, where
 * each line of the file contains:
 * name path comment
 *
 * This is only for fksmbd, for testing.
 */
void
shr_load_file(char *shr_file)
{
    char linebuf[1024];
    FILE *fp;
    char *p;
    char *name, *path, *comment;

    fp = fopen(shr_file, "r");
    if (fp == NULL) {
        perror(shr_file);
        return;
    }

    while ((p = fgets(linebuf, sizeof (linebuf), fp)) != NULL) {

        name = p;
        p = strpbrk(p, " \t\n");
        if (p == NULL)
            continue;
        *p++ = '\0';

        path = p;
        p = strpbrk(p, " \t\n");
        if (p == NULL)
            comment = "";
        else {
            *p++ = '\0';

            comment = p;
            p = strchr(p, '\n');
            if (p != NULL)
                *p++ = '\0';
        }
        new_share(name, path, comment, 0);
    }
    (void) fclose(fp);
}

/*ARGSUSED*/
void *
smb_shr_load(void *args)
{
    char *shr_file;
    _NOTE(ARGUNUSED(args))

    /*
     * Not loading the real shares in fksmbd because that
     * tries to enable the network/smb/server service.
     * Also, we won't generally have access to everything
     * in the real shares, because fksmbd runs (only) with
     * the credentials of the user who runs it.
     */
    new_share("test", "/var/smb/test", "fksmbd test share",
        SMB_SHRF_GUEST_OK);

    /* Allow creating lots of shares for testing. */
    shr_file = getenv("FKSMBD_SHARE_FILE");
    if (shr_file != NULL)
        shr_load_file(shr_file);

    return (NULL);
}