lustre/tests/openfile.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #if 0
  38 #define DEBUG
  39 #endif
  40
  41 /* for O_DIRECTORY and O_DIRECT */
  42 #ifndef _GNU_SOURCE
  43 #define _GNU_SOURCE
  44 #endif
  45
  46 #include <stdio.h>
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #include <fcntl.h>
  50 #include <errno.h>
  51 #include <string.h>
  52 #include <stdlib.h>
  53 #include <unistd.h>
  54 #include <lustre/lustre_user.h>
  55
  56 typedef struct flag_mapping {
  57        const char *string;
  58        const int  flag;
  59 } FLAG_MAPPING;
  60
  61 FLAG_MAPPING flag_table[] = {
  62        {"O_RDONLY", O_RDONLY},
  63        {"O_WRONLY", O_WRONLY},
  64        {"O_RDWR", O_RDWR},
  65        {"O_CREAT", O_CREAT},
  66        {"O_EXCL", O_EXCL},
  67        {"O_NOCTTY", O_NOCTTY},
  68        {"O_TRUNC", O_TRUNC},
  69        {"O_APPEND", O_APPEND},
  70        {"O_NONBLOCK", O_NONBLOCK},
  71        {"O_NDELAY", O_NDELAY},
  72        {"O_SYNC", O_SYNC},
  73 #ifdef O_DIRECT
  74        {"O_DIRECT", O_DIRECT},
  75 #endif
  76        {"O_LARGEFILE", O_LARGEFILE},
  77        {"O_DIRECTORY", O_DIRECTORY},
  78        {"O_NOFOLLOW", O_NOFOLLOW},
  79        {"O_LOV_DELAY_CREATE", O_LOV_DELAY_CREATE},
  80        {"", -1}
  81 };
  82
  83 void Usage_and_abort(void)
  84 {
  85        fprintf(stderr, "Usage: openfile -f flags [ -m mode ] filename \n");
  86        fprintf(stderr, "e.g. openfile -f O_RDWR:O_CREAT -m 0755 /etc/passwd\n");
  87        exit(-1);
  88 }
  89
  90 int main(int argc, char** argv)
  91 {
  92         int    fd;
  93         int    flags = 0;
  94         mode_t mode = 0644;
  95         char  *fname = NULL;
  96         int    mode_set = 0;
  97         int    flag_set = 0;
  98         int    c;
  99         int    save_errno = 0;
 100         int    print_usage = 0;
 101         char  *cloned_flags = NULL;
 102
 103         if (argc == 1)
 104                 Usage_and_abort();
 105
 106         while ((c = getopt (argc, argv, "f:m:")) != -1) {
 107                 switch (c) {
 108                 case 'f': {
 109                         char *tmp;
 110
 111                         cloned_flags = (char *)malloc(strlen(optarg)+1);
 112                         if (cloned_flags == NULL) {
 113                                 fprintf(stderr, "Insufficient memory.\n");
 114                                 save_errno = -1;
 115                                 goto out;
 116                         }
 117
 118                         strncpy(cloned_flags, optarg, strlen(optarg)+1);
 119                         flags = atoi(cloned_flags);
 120                         if (flags > 0) {
 121                                 flag_set = 1;
 122 #ifdef DEBUG
 123                                 printf("flags = %d\n",flags);
 124 #endif
 125                                 break;
 126                         } else {
 127                                 flags = 0;
 128                         }
 129
 130                         for (tmp = strtok(cloned_flags, ":|"); tmp;
 131                              tmp = strtok(NULL, ":|")) {
 132                                 int i = 0;
 133 #ifdef DEBUG
 134                                 printf("flags = %s\n",tmp);
 135 #endif
 136                                 flag_set = 1;
 137                                 for (i = 0; flag_table[i].flag != -1; i++) {
 138                                         if (!strcmp(tmp, flag_table[i].string)){
 139                                                 flags |= flag_table[i].flag;
 140                                                 break;
 141                                         }
 142                                 }
 143
 144                                 if (flag_table[i].flag == -1) {
 145                                         fprintf(stderr, "No such flag: %s\n",
 146                                                 tmp);
 147                                         save_errno = -1;
 148                                         goto out;
 149                                 }
 150                         }
 151 #ifdef DEBUG
 152                         printf("flags = %x\n", flags);
 153 #endif
 154                         break;
 155                 }
 156                 case 'm':
 157 #ifdef DEBUG
 158                         printf("mode = %s\n", optarg);
 159 #endif
 160                         mode = strtol(optarg, NULL, 8);
 161                         mode_set = 1;
 162 #ifdef DEBUG
 163                         printf("mode = %o\n", mode);
 164 #endif
 165                         break;
 166                 default:
 167                         fprintf(stderr, "Bad parameters.\n");
 168                         print_usage = 1;
 169                         goto out;
 170                 }
 171         }
 172
 173         if (optind == argc) {
 174                 fprintf(stderr, "Bad parameters.\n");
 175                 print_usage = 1;
 176                 goto out;
 177         }
 178
 179         fname = argv[optind];
 180
 181         if (!flag_set) {
 182                 fprintf(stderr, "Missing flag or file-name\n");
 183                 save_errno = -1;
 184                 goto out;
 185         }
 186
 187
 188         if (flags & O_CREAT)
 189                 fd = open(fname, flags, mode);
 190         else
 191                 fd = open(fname, flags);
 192
 193         save_errno = errno;
 194
 195         if (fd != -1) {
 196                 printf("Succeed in opening file \"%s\"(flags=%s",
 197                        fname, cloned_flags);
 198
 199                 if (mode_set)
 200                         printf(", mode=%o", mode);
 201                 printf(")\n");
 202                 close(fd);
 203         } else {
 204                 fprintf(stderr, "Error in opening file \"%s\"(flags=%s",
 205                         fname, cloned_flags);
 206                 if (mode_set)
 207                         fprintf(stderr, ", mode=%o", mode);
 208                 fprintf(stderr, ") %d: %s\n", save_errno, strerror(save_errno));
 209         }
 210
 211 out:
 212         if (cloned_flags)
 213                 free(cloned_flags);
 214         if (print_usage)
 215                 Usage_and_abort();
 216
 217         return save_errno;
 218 }