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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License, Version 1.0 only
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6 * (the "License"). You may not use this file except in compliance
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7 * with the License.
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8 *
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9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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10 * or http://www.opensolaris.org/os/licensing.
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11 * See the License for the specific language governing permissions
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12 * and limitations under the License.
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13 *
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14 * When distributing Covered Code, include this CDDL HEADER in each
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15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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16 * If applicable, add the following below this CDDL HEADER, with the
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17 * fields enclosed by brackets "[]" replaced with your own identifying
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18 * information: Portions Copyright [yyyy] [name of copyright owner]
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19 *
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20 * CDDL HEADER END
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21 */
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22 #pragma ident "@(#)mount.c 1.31 05/06/08 SMI"
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23
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24 /*
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25 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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26 * Use is subject to license terms.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <errno.h>
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33 #include <sys/mount.h>
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34 #include <sys/types.h>
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35 #include <locale.h>
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36 #include <sys/stat.h>
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37 #include <fslib.h>
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38 #include <stdio.h>
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39 #include <sys/mnttab.h>
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40 #include <poll.h>
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41
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42 #define MNTTYPE_TMPFS "tmpfs"
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43
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44 static int nmflg = 0;
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45 static int qflg = 0;
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46
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47 static boolean_t
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48 in_mnttab(char *mountp)
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49 {
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50 FILE *file;
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51 int found = B_FALSE;
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52 struct mnttab mntent;
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53
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54 if ((file = fopen("/etc/mnttab", "r")) == NULL)
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55 return (B_FALSE);
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56 while (getmntent(file, &mntent) == 0) {
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57 if (mntent.mnt_mountp != NULL &&
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58 strcmp(mntent.mnt_mountp, mountp) == 0 &&
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59 mntent.mnt_fstype != NULL &&
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60 strcmp(mntent.mnt_fstype, MNTTYPE_TMPFS) == 0) {
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61 found = B_TRUE;
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62 break;
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63 }
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64 }
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65 (void) fclose(file);
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66 return (found);
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67 }
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68
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69 int
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70 main(int argc, char *argv[])
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71 {
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72 /* mount information */
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73 char *special;
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74 char *mountp;
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75
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76 int c;
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77 char *myname;
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78 char typename[64];
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79 extern int optind;
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80 extern char *optarg;
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81 int error = 0;
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82 int verbose = 0;
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83 int mflg = 0;
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84 int optcnt = 0;
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85 int mount_attempts = 5;
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86
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87 char optbuf[MAX_MNTOPT_STR];
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88 int optsize = 0;
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89 char *saveoptbuf;
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90
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91 (void) setlocale(LC_ALL, "");
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92
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93 #if !defined(TEXT_DOMAIN)
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94 #define TEXT_DOMAIN "SYS_TEST"
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95 #endif
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96 (void) textdomain(TEXT_DOMAIN);
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97
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98 myname = strrchr(argv[0], '/');
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99 myname = myname ? myname + 1 : argv[0];
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100 (void) snprintf(typename, sizeof (typename), "%s_%s",
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101 MNTTYPE_TMPFS, myname);
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102 argv[0] = typename;
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103 optbuf[0] = '\0';
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104
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105 while ((c = getopt(argc, argv, "?o:VmOq")) != EOF) {
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106 switch (c) {
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107 case 'V':
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108 verbose++;
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109 break;
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110 case '?':
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111 error++;
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112 break;
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113 case 'm':
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114 nmflg++;
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115 break;
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116 case 'O':
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117 mflg |= MS_OVERLAY;
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118 break;
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119 case 'o':
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120 (void) strncpy(optbuf, optarg, MAX_MNTOPT_STR);
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121 optbuf[MAX_MNTOPT_STR - 1] = '\0';
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122 optsize = strlen(optbuf);
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123
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124 if (verbose)
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125 (void) fprintf(stderr, "optsize:%d optbuf:%s\n",
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126 optsize, optbuf);
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127 break;
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128 case 'q':
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129 qflg++;
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130 break;
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131 }
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132 }
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133
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134 if (verbose && !error) {
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135 char *optptr;
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136
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137 (void) fprintf(stderr, "%s", typename);
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138 for (optcnt = 1; optcnt < argc; optcnt++) {
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139 optptr = argv[optcnt];
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140 if (optptr)
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141 (void) fprintf(stderr, " %s", optptr);
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142 }
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143 (void) fprintf(stderr, "\n");
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144 }
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145
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146 if (argc - optind != 2 || error) {
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147 (void) fprintf(stderr,
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148 gettext("Usage: %s [-o size] swap mount_point\n"),
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149 typename);
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150 exit(32);
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151 }
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152
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153 special = argv[optind++];
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154 mountp = argv[optind++];
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155 mflg |= MS_OPTIONSTR;
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156 mflg |= (nmflg ? MS_NOMNTTAB : 0);
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157
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158 if (verbose) {
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159 (void) fprintf(stderr, "mount(%s, \"%s\", %d, %s",
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160 special, mountp, mflg, MNTTYPE_TMPFS);
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161 if (optsize)
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162 (void) fprintf(stderr, ", \"%s\", %d)\n",
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163 optbuf, strlen(optbuf));
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164 else
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165 (void) fprintf(stderr, ")\n");
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166 }
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167 if (optsize) {
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168 if ((saveoptbuf = strdup(optbuf)) == NULL) {
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169 (void) fprintf(stderr, gettext("%s: out of memory\n"),
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170 "mount");
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171 exit(1);
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172 }
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173 }
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174 again: if (mount(special, mountp, mflg, MNTTYPE_TMPFS, NULL, 0,
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175 optbuf, MAX_MNTOPT_STR)) {
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176 if (errno == EBUSY && !(mflg & MS_OVERLAY)) {
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177 /*
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178 * Because of bug 6176743, any attempt to mount
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179 * tmpfs filesystem could fail for reasons
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180 * described in that bug. We're trying to detect
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181 * that situation here by checking that the filesystem
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182 * we're mounting is not in /etc/mnttab yet.
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183 * When that bug is fixed, this code can be removed.
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184 */
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185 if (!in_mnttab(mountp) && mount_attempts-- > 0) {
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186 (void) poll(NULL, 0, 50);
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187 goto again;
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188 }
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189 (void) fprintf(stderr, gettext(
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190 "%s: %s is already mounted or %s is busy\n"),
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191 myname, mountp, special);
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192 } else {
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193 perror("mount");
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194 }
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195 exit(32);
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196 }
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197
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198 if (optsize && !qflg)
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199 cmp_requested_to_actual_options(saveoptbuf, optbuf,
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200 special, mountp);
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201 return (0);
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202 }
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