| 1 | /* $Id: fs-posix.cpp 30254 2010-06-16 14:37:24Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - File System, Linux.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.alldomusa.eu.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #define LOG_GROUP RTLOGGROUP_FS
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| 32 | #include <sys/statvfs.h>
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| 33 | #include <errno.h>
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| 34 | #include <stdio.h>
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| 35 | #ifdef RT_OS_LINUX
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| 36 | # include <mntent.h>
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| 37 | #endif
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| 38 |
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| 39 | #include <iprt/fs.h>
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| 40 | #include "internal/iprt.h"
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| 41 |
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| 42 | #include <iprt/assert.h>
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| 43 | #include <iprt/err.h>
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| 44 | #include <iprt/log.h>
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| 45 | #include <iprt/string.h>
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| 46 | #include "internal/fs.h"
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| 47 | #include "internal/path.h"
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| 48 |
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| 49 |
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| 50 |
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| 51 | RTR3DECL(int) RTFsQuerySizes(const char *pszFsPath, RTFOFF *pcbTotal, RTFOFF *pcbFree,
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| 52 | uint32_t *pcbBlock, uint32_t *pcbSector)
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| 53 | {
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| 54 | /*
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| 55 | * Validate input.
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| 56 | */
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| 57 | AssertMsgReturn(VALID_PTR(pszFsPath) && *pszFsPath, ("%p", pszFsPath), VERR_INVALID_PARAMETER);
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| 58 |
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| 59 | /*
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| 60 | * Convert the path and query the information.
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| 61 | */
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| 62 | char const *pszNativeFsPath;
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| 63 | int rc = rtPathToNative(&pszNativeFsPath, pszFsPath, NULL);
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| 64 | if (RT_SUCCESS(rc))
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| 65 | {
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| 66 | /** @todo I'm not quite sure if statvfs was properly specified by SuS, I have to check my own
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| 67 | * implementation and FreeBSD before this can eventually be promoted to posix. */
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| 68 | struct statvfs StatVFS;
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| 69 | RT_ZERO(StatVFS);
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| 70 | if (!statvfs(pszNativeFsPath, &StatVFS))
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| 71 | {
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| 72 | /*
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| 73 | * Calc the returned values.
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| 74 | */
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| 75 | if (pcbTotal)
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| 76 | *pcbTotal = (RTFOFF)StatVFS.f_blocks * StatVFS.f_frsize;
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| 77 | if (pcbFree)
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| 78 | *pcbFree = (RTFOFF)StatVFS.f_bavail * StatVFS.f_frsize;
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| 79 | if (pcbBlock)
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| 80 | *pcbBlock = StatVFS.f_frsize;
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| 81 | /* no idea how to get the sector... */
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| 82 | if (pcbSector)
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| 83 | *pcbSector = 512;
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| 84 | }
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| 85 | else
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| 86 | rc = RTErrConvertFromErrno(errno);
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| 87 | rtPathFreeNative(pszNativeFsPath, pszFsPath);
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| 88 | }
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| 89 |
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| 90 | LogFlow(("RTFsQuerySizes(%p:{%s}, %p:{%RTfoff}, %p:{%RTfoff}, %p:{%RX32}, %p:{%RX32}): returns %Rrc\n",
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| 91 | pszFsPath, pszFsPath, pcbTotal, pcbTotal ? *pcbTotal : 0, pcbFree, pcbFree ? *pcbFree : 0,
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| 92 | pcbBlock, pcbBlock ? *pcbBlock : 0, pcbSector, pcbSector ? *pcbSector : 0, rc));
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| 93 | return rc;
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| 94 | }
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| 95 |
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| 96 |
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| 97 | RTR3DECL(int) RTFsQuerySerial(const char *pszFsPath, uint32_t *pu32Serial)
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| 98 | {
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| 99 | /*
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| 100 | * Validate input.
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| 101 | */
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| 102 | AssertMsgReturn(VALID_PTR(pszFsPath) && *pszFsPath, ("%p", pszFsPath), VERR_INVALID_PARAMETER);
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| 103 | AssertMsgReturn(VALID_PTR(pu32Serial), ("%p", pu32Serial), VERR_INVALID_PARAMETER);
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| 104 |
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| 105 | /*
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| 106 | * Conver the path and query the stats.
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| 107 | * We're simply return the device id.
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| 108 | */
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| 109 | char const *pszNativeFsPath;
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| 110 | int rc = rtPathToNative(&pszNativeFsPath, pszFsPath, NULL);
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| 111 | if (RT_SUCCESS(rc))
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| 112 | {
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| 113 | struct stat Stat;
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| 114 | if (!stat(pszNativeFsPath, &Stat))
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| 115 | {
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| 116 | if (pu32Serial)
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| 117 | *pu32Serial = (uint32_t)Stat.st_dev;
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| 118 | }
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| 119 | else
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| 120 | rc = RTErrConvertFromErrno(errno);
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| 121 | rtPathFreeNative(pszNativeFsPath, pszFsPath);
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| 122 | }
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| 123 | LogFlow(("RTFsQuerySerial(%p:{%s}, %p:{%RX32}: returns %Rrc\n",
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| 124 | pszFsPath, pszFsPath, pu32Serial, pu32Serial ? *pu32Serial : 0, rc));
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| 125 | return rc;
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| 126 | }
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| 127 |
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| 128 |
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| 129 | RTR3DECL(int) RTFsQueryProperties(const char *pszFsPath, PRTFSPROPERTIES pProperties)
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| 130 | {
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| 131 | /*
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| 132 | * Validate.
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| 133 | */
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| 134 | AssertMsgReturn(VALID_PTR(pszFsPath) && *pszFsPath, ("%p", pszFsPath), VERR_INVALID_PARAMETER);
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| 135 | AssertMsgReturn(VALID_PTR(pProperties), ("%p", pProperties), VERR_INVALID_PARAMETER);
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| 136 |
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| 137 | /*
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| 138 | * Convert the path and query the information.
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| 139 | */
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| 140 | char const *pszNativeFsPath;
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| 141 | int rc = rtPathToNative(&pszNativeFsPath, pszFsPath, NULL);
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| 142 | if (RT_SUCCESS(rc))
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| 143 | {
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| 144 | struct statvfs StatVFS;
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| 145 | RT_ZERO(StatVFS);
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| 146 | if (!statvfs(pszNativeFsPath, &StatVFS))
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| 147 | {
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| 148 | /*
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| 149 | * Calc/fake the returned values.
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| 150 | */
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| 151 | pProperties->cbMaxComponent = StatVFS.f_namemax;
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| 152 | pProperties->fCaseSensitive = true;
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| 153 | pProperties->fCompressed = false;
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| 154 | pProperties->fFileCompression = false;
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| 155 | pProperties->fReadOnly = !!(StatVFS.f_flag & ST_RDONLY);
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| 156 | pProperties->fRemote = false;
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| 157 | pProperties->fSupportsUnicode = true;
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| 158 | }
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| 159 | else
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| 160 | rc = RTErrConvertFromErrno(errno);
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| 161 | rtPathFreeNative(pszNativeFsPath, pszFsPath);
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| 162 | }
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| 163 |
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| 164 | LogFlow(("RTFsQueryProperties(%p:{%s}, %p:{.cbMaxComponent=%u, .fCaseSensitive=%RTbool}): returns %Rrc\n",
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| 165 | pszFsPath, pszFsPath, pProperties, pProperties->cbMaxComponent, pProperties->fReadOnly));
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| 166 | return VINF_SUCCESS;
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| 167 | }
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| 168 |
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| 169 |
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| 170 | RTR3DECL(int) RTFsQueryType(const char *pszFsPath, uint32_t *pu32Type)
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| 171 | {
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| 172 | /*
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| 173 | * Validate input.
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| 174 | */
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| 175 | AssertMsgReturn(VALID_PTR(pszFsPath) && *pszFsPath, ("%p", pszFsPath), VERR_INVALID_PARAMETER);
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| 176 |
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| 177 | /*
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| 178 | * Convert the path and query the stats.
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| 179 | * We're simply return the device id.
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| 180 | */
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| 181 | char const *pszNativeFsPath;
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| 182 | int rc = rtPathToNative(&pszNativeFsPath, pszFsPath, NULL);
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| 183 | if (RT_SUCCESS(rc))
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| 184 | {
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| 185 | *pu32Type = RTFS_FS_TYPE_UNKNOWN;
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| 186 |
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| 187 | struct stat Stat;
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| 188 | if (!stat(pszNativeFsPath, &Stat))
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| 189 | {
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| 190 | #if defined(RT_OS_LINUX)
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| 191 | FILE *mounted = setmntent("/proc/mounts", "r");
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| 192 | if (!mounted)
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| 193 | mounted = setmntent("/etc/mtab", "r");
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| 194 | if (mounted)
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| 195 | {
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| 196 | char szBuf[1024];
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| 197 | struct stat mntStat;
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| 198 | struct mntent mntEnt;
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| 199 | while (getmntent_r(mounted, &mntEnt, szBuf, sizeof(szBuf)))
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| 200 | {
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| 201 | if (!stat(mntEnt.mnt_dir, &mntStat))
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| 202 | {
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| 203 | if (mntStat.st_dev == Stat.st_dev)
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| 204 | {
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| 205 | if (!strcmp("ext4", mntEnt.mnt_type))
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| 206 | *pu32Type = RTFS_FS_TYPE_EXT4;
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| 207 | else if (!strcmp("ext3", mntEnt.mnt_type))
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| 208 | *pu32Type = RTFS_FS_TYPE_EXT3;
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| 209 | else if (!strcmp("ext2", mntEnt.mnt_type))
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| 210 | *pu32Type = RTFS_FS_TYPE_EXT2;
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| 211 | else if ( !strcmp("vfat", mntEnt.mnt_type)
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| 212 | || !strcmp("msdos", mntEnt.mnt_type))
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| 213 | *pu32Type = RTFS_FS_TYPE_FAT;
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| 214 | else if (!strcmp("tmpfs", mntEnt.mnt_type))
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| 215 | *pu32Type = RTFS_FS_TYPE_TMPFS;
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| 216 | else
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| 217 | {
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| 218 | /* sometimes there are more than one entry for the same partition */
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| 219 | continue;
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| 220 | }
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| 221 | break;
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| 222 | }
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| 223 | }
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| 224 | }
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| 225 | endmntent(mounted);
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| 226 | }
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| 227 | #elif defined(RT_OS_SOLARIS)
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| 228 | if (!strcmp("zfs", Stat.st_fstype))
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| 229 | *pu32Type = RTFS_FS_TYPE_ZFS;
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| 230 | #endif
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| 231 | }
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| 232 | else
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| 233 | rc = RTErrConvertFromErrno(errno);
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| 234 | rtPathFreeNative(pszNativeFsPath, pszFsPath);
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| 235 | }
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| 236 |
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| 237 | return rc;
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| 238 | }
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