| 1 | /* $Id: vbsfmount.c 31203 2010-07-29 12:44:41Z vboxsync $ */
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| 2 | /** @file
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| 3 | * vbsfmount - Commonly used code to mount shared folders on Linux-based
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| 4 | * systems. Currently used by mount.vboxsf and VBoxService.
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2010 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.alldomusa.eu.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 | #include "vbsfmount.h"
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| 20 |
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| 21 | #include <ctype.h>
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| 22 | #include <mntent.h>
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| 23 | #include <stdio.h>
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| 24 | #include <stdlib.h>
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| 25 | #include <string.h>
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| 26 | #include <sys/mount.h>
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| 27 |
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| 28 |
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| 29 | /** @todo Use defines for return values! */
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| 30 | int vbsfmount_complete(const char *host_name, const char *mount_point,
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| 31 | unsigned long flags, struct vbsf_mount_opts *opts)
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| 32 | {
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| 33 | FILE *f, *m;
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| 34 | char *buf;
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| 35 | size_t size;
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| 36 | struct mntent e;
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| 37 | int rc = 0;
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| 38 |
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| 39 | m = open_memstream(&buf, &size);
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| 40 | if (!m)
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| 41 | return 1; /* Could not update mount table (failed to create memstream). */
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| 42 |
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| 43 | if (opts->uid)
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| 44 | fprintf(m, "uid=%d,", opts->uid);
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| 45 | if (opts->gid)
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| 46 | fprintf(m, "gid=%d,", opts->gid);
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| 47 | if (opts->ttl)
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| 48 | fprintf(m, "ttl=%d,", opts->ttl);
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| 49 | if (*opts->nls_name)
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| 50 | fprintf(m, "iocharset=%s,", opts->nls_name);
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| 51 | if (flags & MS_NOSUID)
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| 52 | fprintf(m, "%s,", MNTOPT_NOSUID);
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| 53 | if (flags & MS_RDONLY)
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| 54 | fprintf(m, "%s,", MNTOPT_RO);
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| 55 | else
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| 56 | fprintf(m, "%s,", MNTOPT_RW);
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| 57 |
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| 58 | fclose(m);
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| 59 |
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| 60 | if (size > 0)
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| 61 | buf[size - 1] = 0;
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| 62 | else
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| 63 | buf = "defaults";
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| 64 |
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| 65 | f = setmntent(MOUNTED, "a+");
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| 66 | if (!f)
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| 67 | {
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| 68 | rc = 2; /* Could not open mount table for update. */
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| 69 | }
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| 70 | else
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| 71 | {
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| 72 | e.mnt_fsname = (char*)host_name;
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| 73 | e.mnt_dir = (char*)mount_point;
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| 74 | e.mnt_type = "vboxsf";
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| 75 | e.mnt_opts = buf;
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| 76 | e.mnt_freq = 0;
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| 77 | e.mnt_passno = 0;
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| 78 |
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| 79 | if (addmntent(f, &e))
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| 80 | rc = 3; /* Could not add an entry to the mount table. */
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| 81 |
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| 82 | endmntent(f);
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| 83 | }
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| 84 |
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| 85 | if (size > 0)
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| 86 | {
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| 87 | memset(buf, 0, size);
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| 88 | free(buf);
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| 89 | }
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| 90 |
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| 91 | return rc;
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| 92 | }
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