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/**
* @file utils/nfsref/nfsref.c
* @brief Manage NFS referrals
*/
/*
* Copyright 2011, 2018 Oracle. All rights reserved.
*
* This file is part of nfs-utils.
*
* nfs-utils is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2.0 as
* published by the Free Software Foundation.
*
* nfs-utils is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2.0 for more details.
*
* You should have received a copy of the GNU General Public License
* version 2.0 along with nfs-utils. If not, see:
*
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#include <sys/types.h>
#include <sys/capability.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <getopt.h>
#include <time.h>
#include <locale.h>
#include <langinfo.h>
#include "junction.h"
#include "xlog.h"
#include "nfsref.h"
/**
* Short form command line options
*/
static const char nfsref_opts[] = "?dt:";
/**
* Long form command line options
*/
static const struct option nfsref_longopts[] = {
{ "debug", 0, NULL, 'd', },
{ "help", 0, NULL, '?', },
{ "type", 1, NULL, 't', },
{ NULL, 0, NULL, 0, },
};
/**
* Display program synopsis
*
* @param progname NUL-terminated C string containing name of program
*/
static void
nfsref_usage(const char *progname)
{
fprintf(stderr, "Usage: %s [ -t type ] SUBCOMMAND [ ARGUMENTS ]\n\n",
progname);
fprintf(stderr, "SUBCOMMAND is one of:\n");
fprintf(stderr, "\tadd Add a new junction\n");
fprintf(stderr, "\tremove Remove an existing junction\n");
fprintf(stderr, "\tlookup Enumerate a junction\n");
fprintf(stderr, "\nUse \"%s SUBCOMMAND -?\" for details.\n", progname);
}
/**
* Program entry point
*
* @param argc count of command line arguments
* @param argv array of NUL-terminated C strings containing command line arguments
* @return program exit status
*/
int
main(int argc, char **argv)
{
char *progname, *subcommand, *junct_path;
enum nfsref_type type;
int arg, exit_status;
_Bool help;
(void)setlocale(LC_ALL, "");
(void)umask(S_IWGRP | S_IWOTH);
exit_status = EXIT_FAILURE;
/* Set the basename */
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
xlog_stderr(1);
xlog_syslog(0);
xlog_open(progname);
if (argc < 2) {
nfsref_usage(progname);
goto out;
}
help = false;
type = NFSREF_TYPE_UNSPECIFIED;
while ((arg = getopt_long(argc, argv, nfsref_opts,
nfsref_longopts, NULL)) != -1) {
switch (arg) {
case 'd':
xlog_config(D_ALL, 1);
break;
case 't':
if (strcmp(optarg, "nfs-basic") == 0)
type = NFSREF_TYPE_NFS_BASIC;
else if (strcmp(optarg, "nfs-fedfs") == 0)
type = NFSREF_TYPE_NFS_FEDFS;
else {
xlog(L_ERROR,
"Unrecognized junction type: %s",
optarg);
exit(EXIT_FAILURE);
}
break;
case '?':
help = true;
}
}
if (argc < optind + 1) {
nfsref_usage(progname);
goto out;
}
if (!help && geteuid() != 0) {
xlog(L_ERROR, "Root permission is required");
goto out;
}
subcommand = argv[optind];
junct_path = argv[optind + 1];
if (strcasecmp(subcommand, "add") == 0) {
if (help) {
exit_status = nfsref_add_help(progname);
goto out;
}
if (argc < optind + 3) {
xlog(L_ERROR, "Not enough positional parameters");
nfsref_usage(progname);
goto out;
}
exit_status = nfsref_add(type, junct_path, argv, optind);
if (exit_status == EXIT_SUCCESS)
(void)junction_flush_exports_cache();
} else if (strcasecmp(subcommand, "remove") == 0) {
if (help) {
exit_status = nfsref_remove_help(progname);
goto out;
}
exit_status = nfsref_remove(type, junct_path);
if (exit_status == EXIT_SUCCESS)
(void)junction_flush_exports_cache();
} else if (strcasecmp(subcommand, "lookup") == 0) {
if (help) {
exit_status = nfsref_lookup_help(progname);
goto out;
}
exit_status = nfsref_lookup(type, junct_path);
} else {
xlog(L_ERROR, "Unrecognized subcommand: %s", subcommand);
nfsref_usage(progname);
}
out:
exit(exit_status);
}
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