diff options
Diffstat (limited to 'utils/nfsref/nfsref.c')
| -rw-r--r-- | utils/nfsref/nfsref.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/utils/nfsref/nfsref.c b/utils/nfsref/nfsref.c new file mode 100644 index 0000000..7f97d01 --- /dev/null +++ b/utils/nfsref/nfsref.c @@ -0,0 +1,189 @@ +/** + * @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); +} |