+++ /dev/null
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+++ /dev/null
-/*********************************************************
- * Copyright (C) 2006-2020 VMware, Inc. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation version 2.1 and no later version.
- *
- * This program 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 Lesser GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- *********************************************************/
-
-/*
- * hgfsmounter.c --
- *
- * Helper app for mounting HGFS shares on Linux and FreeBSD. On Linux, we need this
- * because we must pass a binary blob through mount(2) to the HGFS driver, in order
- * to properly communicate the share name that we're interested in mounting. On
- * FreeBSD, we need this because FreeBSD requires that each filesystem type have a
- * separate mount program installed as /sbin/mount_fstype
- */
-
-#define _GNU_SOURCE
-
-#include <ctype.h>
-#include <errno.h>
-#include <getopt.h>
-#include <grp.h>
-#if defined(__linux__)
-# include <mntent.h>
-#endif
-
-#if defined(__FreeBSD__) || defined(__APPLE__)
-# include <sys/uio.h>
-# include <sys/param.h>
-
-# define MS_MANDLOCK 0
-# define MS_RDONLY MNT_RDONLY
-# define MS_SYNCHRONOUS MNT_SYNCHRONOUS
-# define MS_NOEXEC MNT_NOEXEC
-# define MS_NOSUID MNT_NOSUID
-/*
- * MNT_NODEV does not exist, or is set to 0, on newer versions of FreeBSD.
- */
-# if defined(MNT_NODEV) && MNT_NODEV
-# define MS_NODEV MNT_NODEV
-# endif
-# define MS_UNION MNT_UNION
-# define MS_ASYNC MNT_ASYNC
-# define MS_SUIDDIR MNT_SUIDDIR
-# define MS_SOFTDEP MNT_SOFTDEP
-# define MS_NOSYMFOLLOW MNT_NOSYMFOLLOW
-# define MS_JAILDEVFS MNT_JAILDEVFS
-# define MS_MULTILABEL MNT_MULTILABEL
-# define MS_ACLS MNT_ACLS
-# define MS_NODIRATIME 0
-# define MS_NOCLUSTERR MNT_NOCLUSTERR
-# define MS_NOCLUSTERW MNT_NOCLUSTERW
-# define MS_REMOUNT MNT_RELOAD
-
-# if defined(__FreeBSD__)
-# define MS_NOATIME MNT_NOATIME
-# elif defined(__APPLE__)
-/*
- * XXX This is defined in the sys/mount.h in the OS X 10.5 Kernel.framework but not the
- * 10.4 one. Once this is built against the newer library, this should be changed.
- */
-# define MS_NOATIME 0
-# endif
-#endif
-
-#include <sys/mount.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#ifdef MOUNTED /* defined in mntent.h */
-/*
- * If VM_HAVE_MTAB is set, hgfsmounter will update /etc/mtab. This is not necessary on
- * systems such as FreeBSD (and possibly Solaris) that don't have a mtab or the mntent.h
- * routines.
- */
-# define VM_HAVE_MTAB 1
-#endif
-
-#include "hgfsDevLinux.h"
-#include "vm_basic_types.h"
-#include "vm_basic_defs.h"
-#include "vm_assert.h"
-#include "str.h"
-#include "strutil.h"
-#include "vm_version.h"
-#include "hgfsmounter_version.h"
-
-/* XXX embed_version.h does not currently support Mach-O binaries (OS X). */
-#if defined(__linux__) || defined(__FreeBSD__)
-# include "vm_version.h"
-# include "embed_version.h"
- VM_EMBED_VERSION(HGFSMOUNTER_VERSION_STRING);
-#endif
-
-/*
- * Not defined in glibc 2.1.3
- */
-#ifndef MS_BIND
-#define MS_BIND 4096
-#endif
-#ifndef MS_MOVE
-#define MS_MOVE 8192
-#endif
-
-#define MOUNT_OPTS_BUFFER_SIZE 256
-
-#if defined(__GNUC__) && __GNUC__ < 3
-/* __VA_ARGS__ isn't supported by old gcc's, so hack around the situation */
-#define LOG(format...) (beVerbose ? printf(format) : 0)
-#else
-#define LOG(format, ...) (beVerbose ? printf(format, ##__VA_ARGS__) : 0)
-#endif
-
-typedef struct MountOptions {
- char *opt; /* Option name */
- int flag; /* Corresponding flag */
- Bool set; /* Whether the flag should be set or reset */
- char *helpMsg; /* Help message for the option */
- char *logMsg; /* Log message to emit when option was detected */
- /* Special handler for more complex options */
- Bool (*handler)(const char *opt,
- HgfsMountInfo *mountInfo, int *flags);
-} MountOptions;
-
-static char *thisProgram;
-static char *thisProgramBase;
-static char *shareName;
-static char *mountPoint;
-static Bool beVerbose = FALSE;
-
-/*
- *-----------------------------------------------------------------------------
- *
- * PrintVersion --
- *
- * Displays version and exits with success.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static void
-PrintVersion(void)
-{
- printf("%s version: %s\n", thisProgramBase, HGFSMOUNTER_VERSION_STRING);
- exit(EXIT_SUCCESS);
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * GetPathMax
- *
- * Helper function to get the system's maximum path length for a given
- * path. In userspace, PATH_MAX may not be defined, and we must use
- * pathconf(3) to get its value.
- *
- * This is the realpath(3)-approved way of getting the maximum path size,
- * inasmuch as realpath(3) can be an approved function (see the BUGS section
- * in the manpage for details).
- *
- * Results:
- * Always succeeds, returns the maximum path size.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static size_t
-GetPathMax(const char *path) // IN: path to check
-{
- size_t pathMax;
-
-#ifndef PATH_MAX
- long sysPathMax;
-
- /*
- * pathconf(3) may return -1 if the system imposes no pathname bound, or if
- * there was an error. In any case, we're advised by realpath(3)'s manpage
- * not to use the result of pathconf for direct allocation, as it may be too
- * large. So we declare 4096 as our upper bound, to be used when pathconf(3)
- * returns an error, returns zero, returns a very large quantity, or when
- * we learn that there's no limit.
- */
- sysPathMax = pathconf(path, _PC_PATH_MAX);
- if (sysPathMax <= 0 || sysPathMax > 4096) {
- pathMax = 4096;
- } else {
- pathMax = sysPathMax;
- }
-#else
- pathMax = PATH_MAX;
-#endif
-
- return pathMax;
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseShareName
- *
- * A helper function to parse the share name from "host:share" format into
- * two separate strings, reporting errors if any.
- *
- * Results:
- * TRUE on success, shareNameHost and shareNameDir have been set.
- * FALSE otherwise.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static Bool
-ParseShareName(const char *shareName, // IN: Share name to validate
- const char **shareNameHost, // OUT: Share name, host component
- const char **shareNameDir) // OUT: Share name, dir component
-{
- const char *colon;
- const char *dir;
-
- /* 1) Must be colon separated into host and dir. */
- colon = strchr(shareName, ':');
- if (colon == NULL) {
- printf("Share name must be in host:dir format\n");
- return FALSE;
- }
-
- /* 2) Dir must not be empty. */
- dir = colon + 1;
- if (*dir == '\0') {
- printf("Directory in share name must not be empty\n");
- return FALSE;
- }
-
- /* 3) Dir must start with forward slash. */
- if (*dir != '/') {
- printf("Directory in share name must be an absolute path\n");
- return FALSE;
- }
-
- /* 4) Host must be ".host". */
- if (strncmp(shareName, ".host:", 6) != 0) {
- printf("Host in share name must be \".host\"\n");
- return FALSE;
- }
-
- *shareNameHost = ".host";
- LOG("Host component of share name is \"%s\"\n", *shareNameHost);
- *shareNameDir = dir;
- LOG("Directory component of share name is \"%s\"\n", *shareNameDir);
- return TRUE;
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseUid
- *
- * A helper function to process a string containing either a user name
- * or a uid and set up mountInfo accordingly.
- *
- * Results:
- * TRUE on success, mountInfo modified appropriately, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseUid(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags
-{
- Bool success = FALSE;
- unsigned int idx = 0;
- char *optString;
- char *uidString;
- uid_t myUid = 0;
-
- ASSERT(option);
- ASSERT(mountInfo);
- ASSERT(flags);
-
- /* Figure where value starts, we don't need result, just index. */
- optString = StrUtil_GetNextToken(&idx, option, "=");
- ASSERT(optString);
- uidString = StrUtil_GetNextToken(&idx, option, "=");
- if (!uidString) {
- LOG("Error getting the value for uid\n");
- goto out;
- }
-
- /*
- * The uid can be a direct value or a username which we must first
- * translate to its numeric value.
- */
- if (isdigit(*uidString)) {
- errno = 0;
- myUid = strtoul(uidString, NULL, 10);
- if (errno == 0) {
- success = TRUE;
- } else {
- printf("Bad UID value \"%s\"\n", uidString);
- }
- } else {
- struct passwd *pw;
-
- if (!(pw = getpwnam(uidString))) {
- printf("Bad user name \"%s\"\n", uidString);
- } else {
- myUid = pw->pw_uid;
- success = TRUE;
- }
- endpwent();
- }
-
- if (success) {
- mountInfo->uid = myUid;
- mountInfo->uidSet = TRUE;
- LOG("Setting mount owner to %"FMTUID"\n", myUid);
- }
-
- free(uidString);
-out:
- free(optString);
- return success;
-}
-#endif
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseGid
- *
- * A helper function to process a string containing either a group name
- * or a gid and set up mountInfo accordingly.
- *
- * Results:
- * TRUE on success, mountInfo modified appropriately, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseGid(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags
-{
- Bool success = FALSE;
- unsigned int idx = 0;
- char *optString;
- char *gidString;
- gid_t myGid = 0;
-
- ASSERT(option);
- ASSERT(mountInfo);
- ASSERT(flags);
-
- /* Figure where value starts, we don't need result, just index. */
- optString = StrUtil_GetNextToken(&idx, option, "=");
- ASSERT(optString);
- gidString = StrUtil_GetNextToken(&idx, option, "=");
- if (!gidString) {
- LOG("Error getting the value for gid\n");
- goto out;
- }
-
- /*
- * The gid can be a direct value or a group name which we must first
- * translate to its numeric value.
- */
- if (isdigit(*gidString)) {
- errno = 0;
- myGid = strtoul(gidString, NULL, 10);
- if (errno == 0) {
- success = TRUE;
- } else {
- printf("Bad GID value \"%s\"\n", gidString);
- }
- } else {
- struct group *gr;
-
- if (!(gr = getgrnam(gidString))) {
- printf("Bad group name \"%s\"\n", gidString);
- } else {
- myGid = gr->gr_gid;
- success = TRUE;
- }
- endpwent();
- }
-
- if (success) {
- mountInfo->gid = myGid;
- mountInfo->gidSet = TRUE;
- LOG("Setting mount group to %"FMTUID"\n", myGid);
- }
-
- free(gidString);
-out:
- free(optString);
- return success;
-}
-#endif
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseMask
- *
- * A helper function to parse a string containing File/Directory
- * mask value.
- *
- * Results:
- * TRUE on success, along with the mask, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseMask(const char *option, // IN: option string along with value
- unsigned short *pmask) // OUT: parsed mask
-{
- Bool success = FALSE;
- unsigned int idx = 0;
- char *optString;
- char *maskString;
- unsigned short mask;
-
- optString = StrUtil_GetNextToken(&idx, option, "=");
- ASSERT(optString);
- maskString = StrUtil_GetNextToken(&idx, option, "=");
- if (!maskString) {
- LOG("Error getting the value for %s\n", optString);
- goto out;
- }
-
- /*
- * The way to check for an overflow in strtol(3), according to its
- * man page.
- */
- errno = 0;
- mask = strtol(maskString, NULL, 8);
- if (errno == 0) {
- *pmask = mask;
- success = TRUE;
- } else {
- LOG("Error, overflow in %s\n", optString);
- }
-
- free(maskString);
-out:
- free(optString);
- return success;
-}
-#endif
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseFmask
- *
- * A helper function to process a string containing File mask value.
- *
- * Results:
- * TRUE on success, mountInfo modified appropriately, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseFmask(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags
-{
- unsigned short fmask = 0;
- ASSERT(option);
- ASSERT(mountInfo);
-
- if (ParseMask(option, &fmask)) {
- LOG("Setting mount fmask to %o\n", fmask);
- mountInfo->fmask = fmask;
- return TRUE;
- }
-
- return FALSE;
-}
-#endif
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseDmask
- *
- * A helper function to process a string containing dmask value.
- *
- * Results:
- * TRUE on success, mountInfo modified appropriately, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseDmask(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags
-{
- unsigned short dmask = 0;
- ASSERT(option);
- ASSERT(mountInfo);
-
- if (ParseMask(option, &dmask)) {
- LOG("Setting mount dmask to %o\n", dmask);
- mountInfo->dmask = dmask;
- return TRUE;
- }
-
- return FALSE;
-}
-#endif
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseTtl
- *
- * A helper function to process a string containing TTL value.
- *
- * Results:
- * TRUE on success, mountInfo modified appropriately, FALSE on failure.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-#ifndef sun
-static Bool
-ParseTtl(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags
-{
- Bool success = FALSE;
- unsigned int idx = 0;
- char *optString;
- int32 ttl;
-
- ASSERT(option);
- ASSERT(mountInfo);
- ASSERT(flags);
-
- /* Figure where value starts, we don't need result, just index. */
- optString = StrUtil_GetNextToken(&idx, option, "=");
- ASSERT(optString);
-
- if (StrUtil_GetNextIntToken(&ttl, &idx, option, "=") && ttl >= 0) {
- LOG("Setting maximum attribute TTL to %u\n", ttl);
- mountInfo->ttl = ttl;
- success = TRUE;
- } else {
- LOG("Error getting the value for ttl\n");
- }
-
- free(optString);
- return success;
-}
-#endif
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseServerIno --
- *
- * A helper function to process a string containing serverino value.
- *
- * Results:
- * TRUE always success.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static Bool
-ParseServerIno(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags unused
-{
- ASSERT(option);
- ASSERT(mountInfo);
-
- mountInfo->flags |= HGFS_MNTINFO_SERVER_INO;
- LOG("Setting mount flag server ino in 0x%x\n", mountInfo->flags);
- return TRUE;
-}
-
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseNoServerIno --
- *
- * A helper function to process a string containing noserverino value.
- *
- * Results:
- * TRUE always success.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static Bool
-ParseNoServerIno(const char *option, // IN: option string along with value
- HgfsMountInfo *mountInfo, // OUT: mount data
- int *flags) // OUT: mount flags unused
-{
- ASSERT(option);
- ASSERT(mountInfo);
-
- mountInfo->flags &= ~HGFS_MNTINFO_SERVER_INO;
- LOG("Clearing mount flag server ino in 0x%x\n", mountInfo->flags);
- return TRUE;
-}
-
-
-static MountOptions mountOptions[] = {
- { "ro", MS_RDONLY, TRUE, "mount read-only",
- "Setting mount read-only", NULL },
- { "rw", MS_RDONLY, FALSE, "mount read-write",
- "Setting mount read-write", NULL },
- { "nosuid", MS_NOSUID, TRUE, "ignore suid/sgid bits",
- "Setting mount option for allowing suid/sgid bits off", NULL },
- { "suid", MS_NOSUID, FALSE, "allow suid/sgid bits (default)",
- "Setting mount option for allowing suid/sgid bits on", NULL },
-
-#ifndef sun /* Solaris does not have any of these options */
-
- { "uid=<arg>", 0, TRUE, "mount owner (by uid or username)",
- NULL, ParseUid },
- { "gid=<arg>", 0, TRUE, "mount group (by gid or groupname)",
- NULL, ParseGid },
- { "fmask=<arg>", 0, TRUE, "file umask (in octal)",
- NULL, ParseFmask },
- { "dmask=<arg>", 0, TRUE, "directory umask (in octal)",
- NULL, ParseDmask },
-#ifdef MS_NODEV
- { "nodev", MS_NODEV, TRUE, "prevent device node access",
- "Setting mount option for accessing device nodes off", NULL },
- { "dev", MS_NODEV, FALSE, "allow device node access (default)",
- "Setting mount option for accessing device nodes on", NULL },
-#endif
- { "noexec", MS_NOEXEC, TRUE, "prevent program execution",
- "Setting mount option for program execution off", NULL },
- { "exec", MS_NOEXEC, FALSE, "allow program execution (default)",
- "Setting mount option for program execution on", NULL },
- { "sync", MS_SYNCHRONOUS, TRUE, "file writes are synchronous",
- "Setting mount synchronous writes", NULL },
- { "async", MS_SYNCHRONOUS, FALSE, "file writes are asynchronous (default)",
- "Setting mount synchronous writes", NULL },
- { "mand", MS_MANDLOCK, TRUE, "allow mandatory locks",
- "Setting mount option for allow mandatory locks on", NULL },
- { "nomand", MS_MANDLOCK, FALSE, "prevent mandatory locks (default)",
- "Setting mount option for allow mandatory locks off", NULL },
- { "noatime", MS_NOATIME, TRUE, "do not update access times",
- "Setting mount option for updating access times off", NULL },
- { "atime", MS_NOATIME, FALSE, "update access times (default)",
- "Setting mount option for updating access times on", NULL },
- { "nodiratime", MS_NOATIME, TRUE, "do not update directory access times",
- "Setting mount option for updating directory access times off", NULL },
- { "diratime", MS_NOATIME, FALSE, "update access directory times (default)",
- "Setting mount option for updating directory access times on", NULL },
- { "ttl=<arg>", 0, TRUE,
- "time before file attributes must be\n"
- "revalidated (in seconds). Improves\n"
- "performance but decreases coherency.\n"
- "Defaults to 1 if not set.\n",
- NULL, ParseTtl },
- { "bind", MS_BIND, TRUE, "perform bind mount",
- "Setting mount type to bind", NULL },
- { "bind", MS_MOVE, TRUE, "move an existig mount point",
- "Setting mount type to move", NULL },
-#endif
- { "serverino", 0, TRUE,
- "Use server generated inode numbers.\n",
- "Setting mount option for using Server inode numbers on", ParseServerIno },
- { "noserverino", 0, FALSE,
- "Use client generated inode numbers.\n",
- "Setting mount option for using Server inode numbers off", ParseNoServerIno },
-
- { "remount", MS_REMOUNT, TRUE, "remount already mounted filesystem",
- "Setting mount type to remount", NULL }
-};
-
-/*
- *-----------------------------------------------------------------------------
- *
- * ParseOptions --
- *
- * Parses the options passed in by mount. Note that this doesn't correspond
- * to the entire argument string, merely the "-o opt1=val1,opt2=val2"
- * section.
- *
- * Results:
- * TRUE if there were no problems.
- * FALSE if there was an issue parsing an option.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static Bool
-ParseOptions(const char *optionString, // IN: Option string to parse
- HgfsMountInfo *mountInfo, // OUT: Where we put the results
- int *flags) // OUT: Flags we might modify
-{
- unsigned int commaIndex = 0;
- Bool success = FALSE;
- char *key = NULL;
- char *keyVal = NULL;
- int i;
-
- ASSERT(optionString);
- ASSERT(mountInfo);
- ASSERT(flags);
-
- /* Parse the options string. */
- LOG("Parsing option string: %s\n", optionString);
-
- /* Loop to tokenize <keyval1>,<keyval2>,<keyval3>. */
- while ((keyVal = StrUtil_GetNextToken(&commaIndex,
- optionString, ",")) != NULL) {
- /* Now tokenize <key>[=<val>]. */
- unsigned int equalsIndex = 0;
- key = StrUtil_GetNextToken(&equalsIndex, keyVal, "=");
- if (key == NULL) {
- printf("Malformed options string\n");
- goto out;
- }
-
- for (i = 0; i < ARRAYSIZE(mountOptions); i++) {
- Bool match = FALSE;
- unsigned int idx = 0;
- char *optName = StrUtil_GetNextToken(&idx, mountOptions[i].opt, "=");
-
- if (!optName) {
- printf("Failed to parse option name, out of memory?\n");
- goto out;
- }
-
- match = strcmp(key, optName) == 0;
- free(optName);
-
- if (match) {
- if (mountOptions[i].handler) {
- if (!mountOptions[i].handler(keyVal, mountInfo, flags)) {
- goto out;
- }
- } else {
- if (mountOptions[i].set) {
- *flags |= mountOptions[i].flag;
- } else {
- *flags &= ~mountOptions[i].flag;
- }
- LOG("%s\n", mountOptions[i].logMsg);
- }
- break;
- }
- }
-
- if (i == ARRAYSIZE(mountOptions)) {
- LOG("Skipping unrecognized option \"%s\"\n", key);
- }
-
- free(key);
- free(keyVal);
- key = NULL;
- keyVal = NULL;
- }
-
- success = TRUE;
-
-out:
- free(key);
- free(keyVal);
- return success;
-}
-
-/*
- *-----------------------------------------------------------------------------
- *
- * PrintUsage --
- *
- * Displays usage for the HGFS mounting utility, and exits with failure.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *-----------------------------------------------------------------------------
- */
-
-static void
-PrintUsage(void)
-{
- int i;
-
- printf("Usage: %s <sharename> <dir> [-o <options>]\n", thisProgramBase);
- printf("Mount the HGFS share, specified by name, to a local directory.\n");
- printf("Share name must be in host:dir format.\n\nOptions:\n");
-
- for (i = 0; i < ARRAYSIZE(mountOptions); i++) {
- Bool printOptName = TRUE;
- unsigned int tokidx = 0;
- char *msg;
-
- while ((msg = StrUtil_GetNextToken(&tokidx,
- mountOptions[i].helpMsg,
- "\n")) != NULL) {
- printf(" %-15s %s\n",
- printOptName ? mountOptions[i].opt : "", msg);
- free(msg);
- printOptName = FALSE;
- }
- }
-
- printf("\n");
- printf("This command is intended to be run from within /bin/mount by\n");
- printf("passing the option '-t %s'. For example:\n", HGFS_NAME);
- printf(" mount -t %s .host:/ /mnt/hgfs/\n", HGFS_NAME);
- printf(" mount -t %s .host:/foo /mnt/foo\n", HGFS_NAME);
- printf(" mount -t %s .host:/foo/bar /var/lib/bar\n", HGFS_NAME);
- exit(EXIT_FAILURE);
-}
-
-
-#ifdef VM_HAVE_MTAB
-/*
- *-----------------------------------------------------------------------------
- *
- * UpdateMtab --
- *
- * Write the results of the mount into /etc/mtab.
- *
- * Results:
- * None.
- *
- * Side effects:
- * May write to /etc/mtab.
- *
- *-----------------------------------------------------------------------------
- */
-
-static void
-UpdateMtab(HgfsMountInfo *mountInfo, // IN: Info to write into mtab
- int flags) // IN: Flags (read-only, etc.)
-{
- struct mntent mountEnt;
- FILE *mountFile;
- struct passwd *password;
- char *userName = NULL;
-
- ASSERT(mountInfo);
-
- mountFile = setmntent(MOUNTED, "a+");
- if (mountFile == NULL) {
- printf("Could not open mtab for appending, continuing sans mtab\n");
- return;
- }
-
- /* We only care about the mounting user if it isn't root. */
- if (getuid() != 0) {
- password = getpwuid(getuid());
- if (password == NULL) {
- printf("Could not get user for mounting uid, skipping user entry\n");
- } else {
- userName = password->pw_name;
- }
- }
-
- /*
- * Create the mtab entry to be written. We'll go ahead and try to write
- * even if we fail to allocate the mount options.
- */
- mountEnt.mnt_fsname = shareName;
- mountEnt.mnt_dir = mountPoint;
- mountEnt.mnt_type = HGFS_NAME;
- mountEnt.mnt_freq = 0;
- mountEnt.mnt_passno = 0;
- mountEnt.mnt_opts = malloc(MOUNT_OPTS_BUFFER_SIZE);
- if (mountEnt.mnt_opts) {
- char *ttlString;
-
- memset(mountEnt.mnt_opts, 0, MOUNT_OPTS_BUFFER_SIZE);
-
- /*
- * These are typically the displayed options in /etc/mtab (note that not
- * all options are typically displayed, just those the user may find
- * interesting).
- */
- if (flags & MS_RDONLY) {
- Str_Strcat(mountEnt.mnt_opts, "ro", MOUNT_OPTS_BUFFER_SIZE);
- } else {
- Str_Strcat(mountEnt.mnt_opts, "rw", MOUNT_OPTS_BUFFER_SIZE);
- }
- if (flags & MS_NOSUID) {
- Str_Strcat(mountEnt.mnt_opts, ",nosuid", MOUNT_OPTS_BUFFER_SIZE);
- }
-#ifdef MS_NODEV
- if (flags & MS_NODEV) {
- Str_Strcat(mountEnt.mnt_opts, ",nodev", MOUNT_OPTS_BUFFER_SIZE);
- }
-#endif
- if (flags & MS_NOEXEC) {
- Str_Strcat(mountEnt.mnt_opts, ",noexec", MOUNT_OPTS_BUFFER_SIZE);
- }
- if (flags & MS_SYNCHRONOUS) {
- Str_Strcat(mountEnt.mnt_opts, ",sync", MOUNT_OPTS_BUFFER_SIZE);
- }
- if (flags & MS_MANDLOCK) {
- Str_Strcat(mountEnt.mnt_opts, ",mand", MOUNT_OPTS_BUFFER_SIZE);
- }
- if (flags & MS_NOATIME) {
- Str_Strcat(mountEnt.mnt_opts, ",noatime", MOUNT_OPTS_BUFFER_SIZE);
- }
- if (flags & MS_NODIRATIME) {
- Str_Strcat(mountEnt.mnt_opts, ",nodiratime", MOUNT_OPTS_BUFFER_SIZE);
- }
-
- if (userName != NULL) {
- Str_Strcat(mountEnt.mnt_opts, ",user=", MOUNT_OPTS_BUFFER_SIZE);
- Str_Strcat(mountEnt.mnt_opts, userName, MOUNT_OPTS_BUFFER_SIZE);
- }
-
- ttlString = Str_Asprintf(NULL, "%u", mountInfo->ttl);
- if (ttlString != NULL) {
- Str_Strcat(mountEnt.mnt_opts, ",ttl=", MOUNT_OPTS_BUFFER_SIZE);
- Str_Strcat(mountEnt.mnt_opts, ttlString, MOUNT_OPTS_BUFFER_SIZE);
- free(ttlString);
- } else {
- printf("Could not allocate memory for ttl entry in mtab, "
- "continuing\n");
- }
- }
-
- /* Add the entry and close. */
- if (addmntent(mountFile, &mountEnt)) {
- printf("Could not add entry to mtab, continuing\n");
- }
- endmntent(mountFile);
- if (mountEnt.mnt_opts) {
- free(mountEnt.mnt_opts);
- }
-}
-#endif
-
-
-
-/*-----------------------------------------------------------------------------
- *
- * main --
- *
- * Main entry point. Parses the mount options received, makes a call to
- * mount(2), and handles the results.
- *
- * Results:
- * Zero on success, non-zero on failure.
- *
- * Side effects:
- * May mount an HGFS filesystem.
- *
- *-----------------------------------------------------------------------------
- */
-
-int
-main(int argc, // IN
- char *argv[]) // IN
-{
-#ifdef VM_HAVE_MTAB
- Bool doMtab = TRUE;
-#endif
- char c;
- int i;
- int result = EXIT_FAILURE;
- int flags = 0;
- int mntRes = -1;
- char *optionString = NULL;
- const char *shareNameHost = NULL;
- const char *shareNameDir = NULL;
- struct stat statBuf;
- HgfsMountInfo mountInfo;
- char *canonicalizedPath = NULL;
- size_t pathMax;
-
- thisProgram = argv[0];
-
- /* Compute the base name of the program, too. */
- thisProgramBase = strrchr(thisProgram, '/');
- if (thisProgramBase != NULL) {
- thisProgramBase++;
- } else {
- thisProgramBase = thisProgram;
- }
- setpwent();
-
- if (argc < 3) {
- PrintUsage();
- }
-
- while ((c = getopt(argc, argv, "hno:vV")) != -1) {
- switch (c) {
- case '?':
- case 'h':
- PrintUsage();
-#ifdef VM_HAVE_MTAB
- case 'n':
- doMtab = FALSE;
- break;
-#endif
- case 'o':
- if (optionString == NULL) {
- optionString = strdup(optarg);
- } else {
- size_t newLength;
- char *savedString = optionString;
- newLength = strlen(optionString) + strlen(",") +
- strlen(optarg) + sizeof '\0';
- optionString = realloc(optionString, newLength);
- if (optionString != NULL) {
- Str_Strcat(optionString, ",", newLength);
- Str_Strcat(optionString, optarg, newLength);
- } else {
- free(savedString);
- }
- }
- if (optionString == NULL) {
- printf("Error: could not allocate memory for options\n");
- goto out;
- }
- break;
- case 'v':
- beVerbose = TRUE;
- break;
- case 'V':
- PrintVersion();
- default:
- printf("Error: unknown mount option %c\n", c);
- PrintUsage();
- }
- }
-
- LOG("Original command line: \"%s", thisProgram);
- for (i = 1; i < argc; i++) {
- LOG(" %s", argv[i]);
- }
- LOG("\"\n");
-
- /* After getopt_long(3), optind is the first non-option argument. */
- shareName = argv[optind];
- mountPoint = argv[optind + 1];
-
- /*
- * We canonicalize the mount point to avoid any discrepancies between the actual mount
- * point and the listed mount point in /etc/mtab (such discrepancies could prevent
- * umount(8) from removing the mount point from /etc/mtab).
- */
- pathMax = GetPathMax(mountPoint);
- canonicalizedPath = malloc(pathMax * sizeof *canonicalizedPath);
- if (canonicalizedPath == NULL) {
- printf("Error: cannot allocate memory for canonicalized path, "
- "canceling mount\n");
- goto out;
- } else if (!realpath(mountPoint, canonicalizedPath)) {
- perror("Error: cannot canonicalize mount point");
- goto out;
- }
- mountPoint = canonicalizedPath;
-
- if (!ParseShareName(shareName, &shareNameHost, &shareNameDir)) {
- printf("Error: share name is invalid, canceling mount\n");
- goto out;
- }
-
- mountInfo.magicNumber = HGFS_SUPER_MAGIC;
- mountInfo.infoSize = sizeof mountInfo;
- mountInfo.version = HGFS_MOUNTINFO_VERSION_2;
-
-#ifndef sun
- mountInfo.fmask = 0;
- mountInfo.dmask = 0;
- mountInfo.uidSet = FALSE;
- mountInfo.gidSet = FALSE;
- mountInfo.ttl = HGFS_DEFAULT_TTL;
-#if defined(__APPLE__)
- strlcpy(mountInfo.shareNameHost, shareNameHost, MAXPATHLEN);
- strlcpy(mountInfo.shareNameDir, shareNameDir, MAXPATHLEN);
-#else
- mountInfo.shareNameHost = shareNameHost;
- mountInfo.shareNameDir = shareNameDir;
-#endif
-#endif
- /*
- * Default flags which maybe modified by user passed options.
- */
- mountInfo.flags = HGFS_MNTINFO_SERVER_INO;
-
- /*
- * This'll write the rest of the options into HgfsMountInfo and possibly
- * modify the flags.
- */
- if (optionString && !ParseOptions(optionString, &mountInfo, &flags)) {
- printf("Error: could not parse options string\n");
- goto out;
- }
-
- /* Do some sanity checks on our desired mount point. */
- if (stat(mountPoint, &statBuf)) {
- perror("Error: cannot stat mount point");
- goto out;
- }
- if (S_ISDIR(statBuf.st_mode) == 0) {
- printf("Error: mount point \"%s\" is not a directory\n", mountPoint);
- goto out;
- }
-
- /*
- * Must be root in one flavor or another. If we're suid root, only proceed
- * if the user owns the mountpoint.
- */
- if (geteuid() != 0) {
- printf("Error: either you're not root, or %s isn't installed SUID\n",
- thisProgram);
- goto out;
- } else if (getuid() != 0 && (getuid() != statBuf.st_uid ||
- (statBuf.st_mode & S_IRWXU) != S_IRWXU)) {
- printf("Error: for user mounts, user must own the mount point\n");
- goto out;
- }
-
- /* Go! */
-#if defined(__linux__)
- mntRes = mount(shareName, mountPoint, HGFS_NAME, flags, &mountInfo);
-#elif defined(__FreeBSD__)
- {
- struct iovec iov[] = {{"fstype", sizeof("fstype")},
- {HGFS_NAME, sizeof(HGFS_NAME)},
- {"target", sizeof("target")},
- {shareName, strlen(shareName) + 1},
- {"fspath", sizeof("fspath")},
- {(void *)mountPoint, strlen(mountPoint) + 1},
- {"uidSet", sizeof("uidSet")},
- {&mountInfo.uidSet, sizeof(mountInfo.uidSet)},
- {"uid", sizeof("uid")},
- {&mountInfo.uid, sizeof(mountInfo.uid)},
- {"gidSet", sizeof("gidSet")},
- {&mountInfo.gidSet, sizeof(mountInfo.gidSet)},
- {"gid", sizeof("gid")},
- {&mountInfo.gid, sizeof(mountInfo.gid)}};
-
- mntRes = nmount(iov, ARRAYSIZE(iov), flags);
- }
-#elif defined(__APPLE__)
- mntRes = mount(HGFS_NAME, mountPoint, flags, &mountInfo);
-#elif defined(sun)
- mntRes = mount(mountPoint, mountPoint, MS_DATA | flags, HGFS_NAME,
- &mountInfo, sizeof mountInfo);
-#endif
- if (mntRes) {
- perror("Error: cannot mount filesystem");
- goto out;
- }
- result = EXIT_SUCCESS;
-
-#ifdef VM_HAVE_MTAB
- if (doMtab) {
- UpdateMtab(&mountInfo, flags);
- }
-#endif
-
- out:
- free(optionString);
- free(canonicalizedPath);
- return result;
-}
-
projects / thirdparty / open-vm-tools.git / commitdiff
