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ghcup-hs/3rdparty/libarchive/c/archive_acl.c

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Use libarchive instead of tar-bytestring
2020-07-04 21:33:48 +00:00
/*-
* Copyright (c) 2003-2010 Tim Kientzle
* Copyright (c) 2016 Martin Matuska
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD$");
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif
#include "archive_acl_private.h"
#include "archive_entry.h"
#include "archive_private.h"
#undef max
#define max(a, b) ((a)>(b)?(a):(b))
#ifndef HAVE_WMEMCMP
/* Good enough for simple equality testing, but not for sorting. */
#define wmemcmp(a,b,i) memcmp((a), (b), (i) * sizeof(wchar_t))
#endif
static int acl_special(struct archive_acl *acl,
int type, int permset, int tag);
static struct archive_acl_entry *acl_new_entry(struct archive_acl *acl,
int type, int permset, int tag, int id);
static int archive_acl_add_entry_len_l(struct archive_acl *acl,
int type, int permset, int tag, int id, const char *name,
size_t len, struct archive_string_conv *sc);
static int archive_acl_text_want_type(struct archive_acl *acl, int flags);
static ssize_t archive_acl_text_len(struct archive_acl *acl, int want_type,
int flags, int wide, struct archive *a,
struct archive_string_conv *sc);
static int isint_w(const wchar_t *start, const wchar_t *end, int *result);
static int ismode_w(const wchar_t *start, const wchar_t *end, int *result);
static int is_nfs4_flags_w(const wchar_t *start, const wchar_t *end,
int *result);
static int is_nfs4_perms_w(const wchar_t *start, const wchar_t *end,
int *result);
static void next_field_w(const wchar_t **wp, const wchar_t **start,
const wchar_t **end, wchar_t *sep);
static void append_entry_w(wchar_t **wp, const wchar_t *prefix, int type,
int tag, int flags, const wchar_t *wname, int perm, int id);
static void append_id_w(wchar_t **wp, int id);
static int isint(const char *start, const char *end, int *result);
static int ismode(const char *start, const char *end, int *result);
static int is_nfs4_flags(const char *start, const char *end,
int *result);
static int is_nfs4_perms(const char *start, const char *end,
int *result);
static void next_field(const char **p, const char **start,
const char **end, char *sep);
static void append_entry(char **p, const char *prefix, int type,
int tag, int flags, const char *name, int perm, int id);
static void append_id(char **p, int id);
static const struct {
const int perm;
const char c;
const wchar_t wc;
} nfsv4_acl_perm_map[] = {
{ ARCHIVE_ENTRY_ACL_READ_DATA | ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, 'r',
L'r' },
{ ARCHIVE_ENTRY_ACL_WRITE_DATA | ARCHIVE_ENTRY_ACL_ADD_FILE, 'w',
L'w' },
{ ARCHIVE_ENTRY_ACL_EXECUTE, 'x', L'x' },
{ ARCHIVE_ENTRY_ACL_APPEND_DATA | ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY,
'p', L'p' },
{ ARCHIVE_ENTRY_ACL_DELETE, 'd', L'd' },
{ ARCHIVE_ENTRY_ACL_DELETE_CHILD, 'D', L'D' },
{ ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, 'a', L'a' },
{ ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, 'A', L'A' },
{ ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, 'R', L'R' },
{ ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, 'W', L'W' },
{ ARCHIVE_ENTRY_ACL_READ_ACL, 'c', L'c' },
{ ARCHIVE_ENTRY_ACL_WRITE_ACL, 'C', L'C' },
{ ARCHIVE_ENTRY_ACL_WRITE_OWNER, 'o', L'o' },
{ ARCHIVE_ENTRY_ACL_SYNCHRONIZE, 's', L's' }
};
static const int nfsv4_acl_perm_map_size = (int)(sizeof(nfsv4_acl_perm_map) /
sizeof(nfsv4_acl_perm_map[0]));
static const struct {
const int perm;
const char c;
const wchar_t wc;
} nfsv4_acl_flag_map[] = {
{ ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, 'f', L'f' },
{ ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, 'd', L'd' },
{ ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, 'i', L'i' },
{ ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, 'n', L'n' },
{ ARCHIVE_ENTRY_ACL_ENTRY_SUCCESSFUL_ACCESS, 'S', L'S' },
{ ARCHIVE_ENTRY_ACL_ENTRY_FAILED_ACCESS, 'F', L'F' },
{ ARCHIVE_ENTRY_ACL_ENTRY_INHERITED, 'I', L'I' }
};
static const int nfsv4_acl_flag_map_size = (int)(sizeof(nfsv4_acl_flag_map) /
sizeof(nfsv4_acl_flag_map[0]));
void
archive_acl_clear(struct archive_acl *acl)
{
struct archive_acl_entry *ap;
while (acl->acl_head != NULL) {
ap = acl->acl_head->next;
archive_mstring_clean(&acl->acl_head->name);
free(acl->acl_head);
acl->acl_head = ap;
}
free(acl->acl_text_w);
acl->acl_text_w = NULL;
free(acl->acl_text);
acl->acl_text = NULL;
acl->acl_p = NULL;
acl->acl_types = 0;
acl->acl_state = 0; /* Not counting. */
}
void
archive_acl_copy(struct archive_acl *dest, struct archive_acl *src)
{
struct archive_acl_entry *ap, *ap2;
archive_acl_clear(dest);
dest->mode = src->mode;
ap = src->acl_head;
while (ap != NULL) {
ap2 = acl_new_entry(dest,
ap->type, ap->permset, ap->tag, ap->id);
if (ap2 != NULL)
archive_mstring_copy(&ap2->name, &ap->name);
ap = ap->next;
}
}
int
archive_acl_add_entry(struct archive_acl *acl,
int type, int permset, int tag, int id, const char *name)
{
struct archive_acl_entry *ap;
if (acl_special(acl, type, permset, tag) == 0)
return ARCHIVE_OK;
ap = acl_new_entry(acl, type, permset, tag, id);
if (ap == NULL) {
/* XXX Error XXX */
return ARCHIVE_FAILED;
}
if (name != NULL && *name != '\0')
archive_mstring_copy_mbs(&ap->name, name);
else
archive_mstring_clean(&ap->name);
return ARCHIVE_OK;
}
int
archive_acl_add_entry_w_len(struct archive_acl *acl,
int type, int permset, int tag, int id, const wchar_t *name, size_t len)
{
struct archive_acl_entry *ap;
if (acl_special(acl, type, permset, tag) == 0)
return ARCHIVE_OK;
ap = acl_new_entry(acl, type, permset, tag, id);
if (ap == NULL) {
/* XXX Error XXX */
return ARCHIVE_FAILED;
}
if (name != NULL && *name != L'\0' && len > 0)
archive_mstring_copy_wcs_len(&ap->name, name, len);
else
archive_mstring_clean(&ap->name);
return ARCHIVE_OK;
}
static int
archive_acl_add_entry_len_l(struct archive_acl *acl,
int type, int permset, int tag, int id, const char *name, size_t len,
struct archive_string_conv *sc)
{
struct archive_acl_entry *ap;
int r;
if (acl_special(acl, type, permset, tag) == 0)
return ARCHIVE_OK;
ap = acl_new_entry(acl, type, permset, tag, id);
if (ap == NULL) {
/* XXX Error XXX */
return ARCHIVE_FAILED;
}
if (name != NULL && *name != '\0' && len > 0) {
r = archive_mstring_copy_mbs_len_l(&ap->name, name, len, sc);
} else {
r = 0;
archive_mstring_clean(&ap->name);
}
if (r == 0)
return (ARCHIVE_OK);
else if (errno == ENOMEM)
return (ARCHIVE_FATAL);
else
return (ARCHIVE_WARN);
}
/*
* If this ACL entry is part of the standard POSIX permissions set,
* store the permissions in the stat structure and return zero.
*/
static int
acl_special(struct archive_acl *acl, int type, int permset, int tag)
{
if (type == ARCHIVE_ENTRY_ACL_TYPE_ACCESS
&& ((permset & ~007) == 0)) {
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
acl->mode &= ~0700;
acl->mode |= (permset & 7) << 6;
return (0);
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
acl->mode &= ~0070;
acl->mode |= (permset & 7) << 3;
return (0);
case ARCHIVE_ENTRY_ACL_OTHER:
acl->mode &= ~0007;
acl->mode |= permset & 7;
return (0);
}
}
return (1);
}
/*
* Allocate and populate a new ACL entry with everything but the
* name.
*/
static struct archive_acl_entry *
acl_new_entry(struct archive_acl *acl,
int type, int permset, int tag, int id)
{
struct archive_acl_entry *ap, *aq;
/* Type argument must be a valid NFS4 or POSIX.1e type.
* The type must agree with anything already set and
* the permset must be compatible. */
if (type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
if (acl->acl_types & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
return (NULL);
}
if (permset &
~(ARCHIVE_ENTRY_ACL_PERMS_NFS4
| ARCHIVE_ENTRY_ACL_INHERITANCE_NFS4)) {
return (NULL);
}
} else if (type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) {
if (acl->acl_types & ~ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) {
return (NULL);
}
if (permset & ~ARCHIVE_ENTRY_ACL_PERMS_POSIX1E) {
return (NULL);
}
} else {
return (NULL);
}
/* Verify the tag is valid and compatible with NFS4 or POSIX.1e. */
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER:
case ARCHIVE_ENTRY_ACL_USER_OBJ:
case ARCHIVE_ENTRY_ACL_GROUP:
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
/* Tags valid in both NFS4 and POSIX.1e */
break;
case ARCHIVE_ENTRY_ACL_MASK:
case ARCHIVE_ENTRY_ACL_OTHER:
/* Tags valid only in POSIX.1e. */
if (type & ~ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) {
return (NULL);
}
break;
case ARCHIVE_ENTRY_ACL_EVERYONE:
/* Tags valid only in NFS4. */
if (type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
return (NULL);
}
break;
default:
/* No other values are valid. */
return (NULL);
}
free(acl->acl_text_w);
acl->acl_text_w = NULL;
free(acl->acl_text);
acl->acl_text = NULL;
/*
* If there's a matching entry already in the list, overwrite it.
* NFSv4 entries may be repeated and are not overwritten.
*
* TODO: compare names of no id is provided (needs more rework)
*/
ap = acl->acl_head;
aq = NULL;
while (ap != NULL) {
if (((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) == 0) &&
ap->type == type && ap->tag == tag && ap->id == id) {
if (id != -1 || (tag != ARCHIVE_ENTRY_ACL_USER &&
tag != ARCHIVE_ENTRY_ACL_GROUP)) {
ap->permset = permset;
return (ap);
}
}
aq = ap;
ap = ap->next;
}
/* Add a new entry to the end of the list. */
ap = (struct archive_acl_entry *)calloc(1, sizeof(*ap));
if (ap == NULL)
return (NULL);
if (aq == NULL)
acl->acl_head = ap;
else
aq->next = ap;
ap->type = type;
ap->tag = tag;
ap->id = id;
ap->permset = permset;
acl->acl_types |= type;
return (ap);
}
/*
* Return a count of entries matching "want_type".
*/
int
archive_acl_count(struct archive_acl *acl, int want_type)
{
int count;
struct archive_acl_entry *ap;
count = 0;
ap = acl->acl_head;
while (ap != NULL) {
if ((ap->type & want_type) != 0)
count++;
ap = ap->next;
}
if (count > 0 && ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0))
count += 3;
return (count);
}
/*
* Return a bitmask of stored ACL types in an ACL list
*/
int
archive_acl_types(struct archive_acl *acl)
{
return (acl->acl_types);
}
/*
* Prepare for reading entries from the ACL data. Returns a count
* of entries matching "want_type", or zero if there are no
* non-extended ACL entries of that type.
*/
int
archive_acl_reset(struct archive_acl *acl, int want_type)
{
int count, cutoff;
count = archive_acl_count(acl, want_type);
/*
* If the only entries are the three standard ones,
* then don't return any ACL data. (In this case,
* client can just use chmod(2) to set permissions.)
*/
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0)
cutoff = 3;
else
cutoff = 0;
if (count > cutoff)
acl->acl_state = ARCHIVE_ENTRY_ACL_USER_OBJ;
else
acl->acl_state = 0;
acl->acl_p = acl->acl_head;
return (count);
}
/*
* Return the next ACL entry in the list. Fake entries for the
* standard permissions and include them in the returned list.
*/
int
archive_acl_next(struct archive *a, struct archive_acl *acl, int want_type,
int *type, int *permset, int *tag, int *id, const char **name)
{
*name = NULL;
*id = -1;
/*
* The acl_state is either zero (no entries available), -1
* (reading from list), or an entry type (retrieve that type
* from ae_stat.aest_mode).
*/
if (acl->acl_state == 0)
return (ARCHIVE_WARN);
/* The first three access entries are special. */
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
switch (acl->acl_state) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
*permset = (acl->mode >> 6) & 7;
*type = ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
*tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
acl->acl_state = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
return (ARCHIVE_OK);
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
*permset = (acl->mode >> 3) & 7;
*type = ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
*tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
acl->acl_state = ARCHIVE_ENTRY_ACL_OTHER;
return (ARCHIVE_OK);
case ARCHIVE_ENTRY_ACL_OTHER:
*permset = acl->mode & 7;
*type = ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
*tag = ARCHIVE_ENTRY_ACL_OTHER;
acl->acl_state = -1;
acl->acl_p = acl->acl_head;
return (ARCHIVE_OK);
default:
break;
}
}
while (acl->acl_p != NULL && (acl->acl_p->type & want_type) == 0)
acl->acl_p = acl->acl_p->next;
if (acl->acl_p == NULL) {
acl->acl_state = 0;
*type = 0;
*permset = 0;
*tag = 0;
*id = -1;
*name = NULL;
return (ARCHIVE_EOF); /* End of ACL entries. */
}
*type = acl->acl_p->type;
*permset = acl->acl_p->permset;
*tag = acl->acl_p->tag;
*id = acl->acl_p->id;
if (archive_mstring_get_mbs(a, &acl->acl_p->name, name) != 0) {
if (errno == ENOMEM)
return (ARCHIVE_FATAL);
*name = NULL;
}
acl->acl_p = acl->acl_p->next;
return (ARCHIVE_OK);
}
/*
* Determine what type of ACL do we want
*/
static int
archive_acl_text_want_type(struct archive_acl *acl, int flags)
{
int want_type;
/* Check if ACL is NFSv4 */
if ((acl->acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
/* NFSv4 should never mix with POSIX.1e */
if ((acl->acl_types & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0)
return (0);
else
return (ARCHIVE_ENTRY_ACL_TYPE_NFS4);
}
/* Now deal with POSIX.1e ACLs */
want_type = 0;
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0)
want_type |= ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0)
want_type |= ARCHIVE_ENTRY_ACL_TYPE_DEFAULT;
/* By default we want both access and default ACLs */
if (want_type == 0)
return (ARCHIVE_ENTRY_ACL_TYPE_POSIX1E);
return (want_type);
}
/*
* Calculate ACL text string length
*/
static ssize_t
archive_acl_text_len(struct archive_acl *acl, int want_type, int flags,
int wide, struct archive *a, struct archive_string_conv *sc) {
struct archive_acl_entry *ap;
const char *name;
const wchar_t *wname;
int count, idlen, tmp, r;
ssize_t length;
size_t len;
count = 0;
length = 0;
for (ap = acl->acl_head; ap != NULL; ap = ap->next) {
if ((ap->type & want_type) == 0)
continue;
/*
* Filemode-mapping ACL entries are stored exclusively in
* ap->mode so they should not be in the list
*/
if ((ap->type == ARCHIVE_ENTRY_ACL_TYPE_ACCESS)
&& (ap->tag == ARCHIVE_ENTRY_ACL_USER_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_GROUP_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_OTHER))
continue;
count++;
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0
&& (ap->type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0)
length += 8; /* "default:" */
switch (ap->tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
if (want_type == ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
length += 6; /* "owner@" */
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_USER:
case ARCHIVE_ENTRY_ACL_MASK:
length += 4; /* "user", "mask" */
break;
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
if (want_type == ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
length += 6; /* "group@" */
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_GROUP:
case ARCHIVE_ENTRY_ACL_OTHER:
length += 5; /* "group", "other" */
break;
case ARCHIVE_ENTRY_ACL_EVERYONE:
length += 9; /* "everyone@" */
break;
}
length += 1; /* colon after tag */
if (ap->tag == ARCHIVE_ENTRY_ACL_USER ||
ap->tag == ARCHIVE_ENTRY_ACL_GROUP) {
if (wide) {
r = archive_mstring_get_wcs(a, &ap->name,
&wname);
if (r == 0 && wname != NULL)
length += wcslen(wname);
else if (r < 0 && errno == ENOMEM)
return (0);
else
length += sizeof(uid_t) * 3 + 1;
} else {
r = archive_mstring_get_mbs_l(&ap->name, &name,
&len, sc);
if (r != 0)
return (0);
if (len > 0 && name != NULL)
length += len;
else
length += sizeof(uid_t) * 3 + 1;
}
length += 1; /* colon after user or group name */
} else if (want_type != ARCHIVE_ENTRY_ACL_TYPE_NFS4)
length += 1; /* 2nd colon empty user,group or other */
if (((flags & ARCHIVE_ENTRY_ACL_STYLE_SOLARIS) != 0)
&& ((want_type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0)
&& (ap->tag == ARCHIVE_ENTRY_ACL_OTHER
|| ap->tag == ARCHIVE_ENTRY_ACL_MASK)) {
/* Solaris has no colon after other: and mask: */
length = length - 1;
}
if (want_type == ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
/* rwxpdDaARWcCos:fdinSFI:deny */
length += 27;
if ((ap->type & ARCHIVE_ENTRY_ACL_TYPE_DENY) == 0)
length += 1; /* allow, alarm, audit */
} else
length += 3; /* rwx */
if ((ap->tag == ARCHIVE_ENTRY_ACL_USER ||
ap->tag == ARCHIVE_ENTRY_ACL_GROUP) &&
(flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID) != 0) {
length += 1; /* colon */
/* ID digit count */
idlen = 1;
tmp = ap->id;
while (tmp > 9) {
tmp = tmp / 10;
idlen++;
}
length += idlen;
}
length ++; /* entry separator */
}
/* Add filemode-mapping access entries to the length */
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
if ((flags & ARCHIVE_ENTRY_ACL_STYLE_SOLARIS) != 0) {
/* "user::rwx\ngroup::rwx\nother:rwx\n" */
length += 31;
} else {
/* "user::rwx\ngroup::rwx\nother::rwx\n" */
length += 32;
}
} else if (count == 0)
return (0);
/* The terminating character is included in count */
return (length);
}
/*
* Generate a wide text version of the ACL. The flags parameter controls
* the type and style of the generated ACL.
*/
wchar_t *
archive_acl_to_text_w(struct archive_acl *acl, ssize_t *text_len, int flags,
struct archive *a)
{
int count;
ssize_t length;
size_t len;
const wchar_t *wname;
const wchar_t *prefix;
wchar_t separator;
struct archive_acl_entry *ap;
int id, r, want_type;
wchar_t *wp, *ws;
want_type = archive_acl_text_want_type(acl, flags);
/* Both NFSv4 and POSIX.1 types found */
if (want_type == 0)
return (NULL);
if (want_type == ARCHIVE_ENTRY_ACL_TYPE_POSIX1E)
flags |= ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT;
length = archive_acl_text_len(acl, want_type, flags, 1, a, NULL);
if (length == 0)
return (NULL);
if (flags & ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA)
separator = L',';
else
separator = L'\n';
/* Now, allocate the string and actually populate it. */
wp = ws = (wchar_t *)malloc(length * sizeof(wchar_t));
if (wp == NULL) {
if (errno == ENOMEM)
__archive_errx(1, "No memory");
return (NULL);
}
count = 0;
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_USER_OBJ, flags, NULL,
acl->mode & 0700, -1);
*wp++ = separator;
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_GROUP_OBJ, flags, NULL,
acl->mode & 0070, -1);
*wp++ = separator;
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_OTHER, flags, NULL,
acl->mode & 0007, -1);
count += 3;
}
for (ap = acl->acl_head; ap != NULL; ap = ap->next) {
if ((ap->type & want_type) == 0)
continue;
/*
* Filemode-mapping ACL entries are stored exclusively in
* ap->mode so they should not be in the list
*/
if ((ap->type == ARCHIVE_ENTRY_ACL_TYPE_ACCESS)
&& (ap->tag == ARCHIVE_ENTRY_ACL_USER_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_GROUP_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_OTHER))
continue;
if (ap->type == ARCHIVE_ENTRY_ACL_TYPE_DEFAULT &&
(flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT) != 0)
prefix = L"default:";
else
prefix = NULL;
r = archive_mstring_get_wcs(a, &ap->name, &wname);
if (r == 0) {
if (count > 0)
*wp++ = separator;
if (flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID)
id = ap->id;
else
id = -1;
append_entry_w(&wp, prefix, ap->type, ap->tag, flags,
wname, ap->permset, id);
count++;
} else if (r < 0 && errno == ENOMEM) {
free(ws);
return (NULL);
}
}
/* Add terminating character */
*wp++ = L'\0';
len = wcslen(ws);
if ((ssize_t)len > (length - 1))
__archive_errx(1, "Buffer overrun");
if (text_len != NULL)
*text_len = len;
return (ws);
}
static void
append_id_w(wchar_t **wp, int id)
{
if (id < 0)
id = 0;
if (id > 9)
append_id_w(wp, id / 10);
*(*wp)++ = L"0123456789"[id % 10];
}
static void
append_entry_w(wchar_t **wp, const wchar_t *prefix, int type,
int tag, int flags, const wchar_t *wname, int perm, int id)
{
int i;
if (prefix != NULL) {
wcscpy(*wp, prefix);
*wp += wcslen(*wp);
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
wname = NULL;
id = -1;
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
wcscpy(*wp, L"owner@");
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_USER:
wcscpy(*wp, L"user");
break;
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
wname = NULL;
id = -1;
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
wcscpy(*wp, L"group@");
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_GROUP:
wcscpy(*wp, L"group");
break;
case ARCHIVE_ENTRY_ACL_MASK:
wcscpy(*wp, L"mask");
wname = NULL;
id = -1;
break;
case ARCHIVE_ENTRY_ACL_OTHER:
wcscpy(*wp, L"other");
wname = NULL;
id = -1;
break;
case ARCHIVE_ENTRY_ACL_EVERYONE:
wcscpy(*wp, L"everyone@");
wname = NULL;
id = -1;
break;
}
*wp += wcslen(*wp);
*(*wp)++ = L':';
if (((type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0) ||
tag == ARCHIVE_ENTRY_ACL_USER ||
tag == ARCHIVE_ENTRY_ACL_GROUP) {
if (wname != NULL) {
wcscpy(*wp, wname);
*wp += wcslen(*wp);
} else if (tag == ARCHIVE_ENTRY_ACL_USER
|| tag == ARCHIVE_ENTRY_ACL_GROUP) {
append_id_w(wp, id);
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) == 0)
id = -1;
}
/* Solaris style has no second colon after other and mask */
if (((flags & ARCHIVE_ENTRY_ACL_STYLE_SOLARIS) == 0)
|| (tag != ARCHIVE_ENTRY_ACL_OTHER
&& tag != ARCHIVE_ENTRY_ACL_MASK))
*(*wp)++ = L':';
}
if ((type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0) {
/* POSIX.1e ACL perms */
*(*wp)++ = (perm & 0444) ? L'r' : L'-';
*(*wp)++ = (perm & 0222) ? L'w' : L'-';
*(*wp)++ = (perm & 0111) ? L'x' : L'-';
} else {
/* NFSv4 ACL perms */
for (i = 0; i < nfsv4_acl_perm_map_size; i++) {
if (perm & nfsv4_acl_perm_map[i].perm)
*(*wp)++ = nfsv4_acl_perm_map[i].wc;
else if ((flags & ARCHIVE_ENTRY_ACL_STYLE_COMPACT) == 0)
*(*wp)++ = L'-';
}
*(*wp)++ = L':';
for (i = 0; i < nfsv4_acl_flag_map_size; i++) {
if (perm & nfsv4_acl_flag_map[i].perm)
*(*wp)++ = nfsv4_acl_flag_map[i].wc;
else if ((flags & ARCHIVE_ENTRY_ACL_STYLE_COMPACT) == 0)
*(*wp)++ = L'-';
}
*(*wp)++ = L':';
switch (type) {
case ARCHIVE_ENTRY_ACL_TYPE_ALLOW:
wcscpy(*wp, L"allow");
break;
case ARCHIVE_ENTRY_ACL_TYPE_DENY:
wcscpy(*wp, L"deny");
break;
case ARCHIVE_ENTRY_ACL_TYPE_AUDIT:
wcscpy(*wp, L"audit");
break;
case ARCHIVE_ENTRY_ACL_TYPE_ALARM:
wcscpy(*wp, L"alarm");
break;
default:
break;
}
*wp += wcslen(*wp);
}
if (id != -1) {
*(*wp)++ = L':';
append_id_w(wp, id);
}
}
/*
* Generate a text version of the ACL. The flags parameter controls
* the type and style of the generated ACL.
*/
char *
archive_acl_to_text_l(struct archive_acl *acl, ssize_t *text_len, int flags,
struct archive_string_conv *sc)
{
int count;
ssize_t length;
size_t len;
const char *name;
const char *prefix;
char separator;
struct archive_acl_entry *ap;
int id, r, want_type;
char *p, *s;
want_type = archive_acl_text_want_type(acl, flags);
/* Both NFSv4 and POSIX.1 types found */
if (want_type == 0)
return (NULL);
if (want_type == ARCHIVE_ENTRY_ACL_TYPE_POSIX1E)
flags |= ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT;
length = archive_acl_text_len(acl, want_type, flags, 0, NULL, sc);
if (length == 0)
return (NULL);
if (flags & ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA)
separator = ',';
else
separator = '\n';
/* Now, allocate the string and actually populate it. */
p = s = (char *)malloc(length * sizeof(char));
if (p == NULL) {
if (errno == ENOMEM)
__archive_errx(1, "No memory");
return (NULL);
}
count = 0;
if ((want_type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_USER_OBJ, flags, NULL,
acl->mode & 0700, -1);
*p++ = separator;
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_GROUP_OBJ, flags, NULL,
acl->mode & 0070, -1);
*p++ = separator;
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_TYPE_ACCESS,
ARCHIVE_ENTRY_ACL_OTHER, flags, NULL,
acl->mode & 0007, -1);
count += 3;
}
for (ap = acl->acl_head; ap != NULL; ap = ap->next) {
if ((ap->type & want_type) == 0)
continue;
/*
* Filemode-mapping ACL entries are stored exclusively in
* ap->mode so they should not be in the list
*/
if ((ap->type == ARCHIVE_ENTRY_ACL_TYPE_ACCESS)
&& (ap->tag == ARCHIVE_ENTRY_ACL_USER_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_GROUP_OBJ
|| ap->tag == ARCHIVE_ENTRY_ACL_OTHER))
continue;
if (ap->type == ARCHIVE_ENTRY_ACL_TYPE_DEFAULT &&
(flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT) != 0)
prefix = "default:";
else
prefix = NULL;
r = archive_mstring_get_mbs_l(
&ap->name, &name, &len, sc);
if (r != 0) {
free(s);
return (NULL);
}
if (count > 0)
*p++ = separator;
if (name == NULL ||
(flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID)) {
id = ap->id;
} else {
id = -1;
}
append_entry(&p, prefix, ap->type, ap->tag, flags, name,
ap->permset, id);
count++;
}
/* Add terminating character */
*p++ = '\0';
len = strlen(s);
if ((ssize_t)len > (length - 1))
__archive_errx(1, "Buffer overrun");
if (text_len != NULL)
*text_len = len;
return (s);
}
static void
append_id(char **p, int id)
{
if (id < 0)
id = 0;
if (id > 9)
append_id(p, id / 10);
*(*p)++ = "0123456789"[id % 10];
}
static void
append_entry(char **p, const char *prefix, int type,
int tag, int flags, const char *name, int perm, int id)
{
int i;
if (prefix != NULL) {
strcpy(*p, prefix);
*p += strlen(*p);
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
name = NULL;
id = -1;
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
strcpy(*p, "owner@");
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_USER:
strcpy(*p, "user");
break;
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
name = NULL;
id = -1;
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
strcpy(*p, "group@");
break;
}
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_GROUP:
strcpy(*p, "group");
break;
case ARCHIVE_ENTRY_ACL_MASK:
strcpy(*p, "mask");
name = NULL;
id = -1;
break;
case ARCHIVE_ENTRY_ACL_OTHER:
strcpy(*p, "other");
name = NULL;
id = -1;
break;
case ARCHIVE_ENTRY_ACL_EVERYONE:
strcpy(*p, "everyone@");
name = NULL;
id = -1;
break;
}
*p += strlen(*p);
*(*p)++ = ':';
if (((type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0) ||
tag == ARCHIVE_ENTRY_ACL_USER ||
tag == ARCHIVE_ENTRY_ACL_GROUP) {
if (name != NULL) {
strcpy(*p, name);
*p += strlen(*p);
} else if (tag == ARCHIVE_ENTRY_ACL_USER
|| tag == ARCHIVE_ENTRY_ACL_GROUP) {
append_id(p, id);
if ((type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) == 0)
id = -1;
}
/* Solaris style has no second colon after other and mask */
if (((flags & ARCHIVE_ENTRY_ACL_STYLE_SOLARIS) == 0)
|| (tag != ARCHIVE_ENTRY_ACL_OTHER
&& tag != ARCHIVE_ENTRY_ACL_MASK))
*(*p)++ = ':';
}
if ((type & ARCHIVE_ENTRY_ACL_TYPE_POSIX1E) != 0) {
/* POSIX.1e ACL perms */
*(*p)++ = (perm & 0444) ? 'r' : '-';
*(*p)++ = (perm & 0222) ? 'w' : '-';
*(*p)++ = (perm & 0111) ? 'x' : '-';
} else {
/* NFSv4 ACL perms */
for (i = 0; i < nfsv4_acl_perm_map_size; i++) {
if (perm & nfsv4_acl_perm_map[i].perm)
*(*p)++ = nfsv4_acl_perm_map[i].c;
else if ((flags & ARCHIVE_ENTRY_ACL_STYLE_COMPACT) == 0)
*(*p)++ = '-';
}
*(*p)++ = ':';
for (i = 0; i < nfsv4_acl_flag_map_size; i++) {
if (perm & nfsv4_acl_flag_map[i].perm)
*(*p)++ = nfsv4_acl_flag_map[i].c;
else if ((flags & ARCHIVE_ENTRY_ACL_STYLE_COMPACT) == 0)
*(*p)++ = '-';
}
*(*p)++ = ':';
switch (type) {
case ARCHIVE_ENTRY_ACL_TYPE_ALLOW:
strcpy(*p, "allow");
break;
case ARCHIVE_ENTRY_ACL_TYPE_DENY:
strcpy(*p, "deny");
break;
case ARCHIVE_ENTRY_ACL_TYPE_AUDIT:
strcpy(*p, "audit");
break;
case ARCHIVE_ENTRY_ACL_TYPE_ALARM:
strcpy(*p, "alarm");
break;
}
*p += strlen(*p);
}
if (id != -1) {
*(*p)++ = ':';
append_id(p, id);
}
}
/*
* Parse a wide ACL text string.
*
* The want_type argument may be one of the following:
* ARCHIVE_ENTRY_ACL_TYPE_ACCESS - text is a POSIX.1e ACL of type ACCESS
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - text is a POSIX.1e ACL of type DEFAULT
* ARCHIVE_ENTRY_ACL_TYPE_NFS4 - text is as a NFSv4 ACL
*
* POSIX.1e ACL entries prefixed with "default:" are treated as
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT unless type is ARCHIVE_ENTRY_ACL_TYPE_NFS4
*/
int
archive_acl_from_text_w(struct archive_acl *acl, const wchar_t *text,
int want_type)
{
struct {
const wchar_t *start;
const wchar_t *end;
} field[6], name;
const wchar_t *s, *st;
int numfields, fields, n, r, sol, ret;
int type, types, tag, permset, id;
size_t len;
wchar_t sep;
ret = ARCHIVE_OK;
types = 0;
switch (want_type) {
case ARCHIVE_ENTRY_ACL_TYPE_POSIX1E:
want_type = ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
__LA_FALLTHROUGH;
case ARCHIVE_ENTRY_ACL_TYPE_ACCESS:
case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT:
numfields = 5;
break;
case ARCHIVE_ENTRY_ACL_TYPE_NFS4:
numfields = 6;
break;
default:
return (ARCHIVE_FATAL);
}
while (text != NULL && *text != L'\0') {
/*
* Parse the fields out of the next entry,
* advance 'text' to start of next entry.
*/
fields = 0;
do {
const wchar_t *start, *end;
next_field_w(&text, &start, &end, &sep);
if (fields < numfields) {
field[fields].start = start;
field[fields].end = end;
}
++fields;
} while (sep == L':');
/* Set remaining fields to blank. */
for (n = fields; n < numfields; ++n)
field[n].start = field[n].end = NULL;
if (field[0].start != NULL && *(field[0].start) == L'#') {
/* Comment, skip entry */
continue;
}
n = 0;
sol = 0;
id = -1;
permset = 0;
name.start = name.end = NULL;
if (want_type != ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
/* POSIX.1e ACLs */
/*
* Default keyword "default:user::rwx"
* if found, we have one more field
*
* We also support old Solaris extension:
* "defaultuser::rwx" is the default ACL corresponding
* to "user::rwx", etc. valid only for first field
*/
s = field[0].start;
len = field[0].end - field[0].start;
if (*s == L'd' && (len == 1 || (len >= 7
&& wmemcmp((s + 1), L"efault", 6) == 0))) {
type = ARCHIVE_ENTRY_ACL_TYPE_DEFAULT;
if (len > 7)
field[0].start += 7;
else
n = 1;
} else
type = want_type;
/* Check for a numeric ID in field n+1 or n+3. */
isint_w(field[n + 1].start, field[n + 1].end, &id);
/* Field n+3 is optional. */
if (id == -1 && fields > n+3)
isint_w(field[n + 3].start, field[n + 3].end,
&id);
tag = 0;
s = field[n].start;
st = field[n].start + 1;
len = field[n].end - field[n].start;
switch (*s) {
case L'u':
if (len == 1 || (len == 4
&& wmemcmp(st, L"ser", 3) == 0))
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
break;
case L'g':
if (len == 1 || (len == 5
&& wmemcmp(st, L"roup", 4) == 0))
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
break;
case L'o':
if (len == 1 || (len == 5
&& wmemcmp(st, L"ther", 4) == 0))
tag = ARCHIVE_ENTRY_ACL_OTHER;
break;
case L'm':
if (len == 1 || (len == 4
&& wmemcmp(st, L"ask", 3) == 0))
tag = ARCHIVE_ENTRY_ACL_MASK;
break;
default:
break;
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_OTHER:
case ARCHIVE_ENTRY_ACL_MASK:
if (fields == (n + 2)
&& field[n + 1].start < field[n + 1].end
&& ismode_w(field[n + 1].start,
field[n + 1].end, &permset)) {
/* This is Solaris-style "other:rwx" */
sol = 1;
} else if (fields == (n + 3) &&
field[n + 1].start < field[n + 1].end) {
/* Invalid mask or other field */
ret = ARCHIVE_WARN;
continue;
}
break;
case ARCHIVE_ENTRY_ACL_USER_OBJ:
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
if (id != -1 ||
field[n + 1].start < field[n + 1].end) {
name = field[n + 1];
if (tag == ARCHIVE_ENTRY_ACL_USER_OBJ)
tag = ARCHIVE_ENTRY_ACL_USER;
else
tag = ARCHIVE_ENTRY_ACL_GROUP;
}
break;
default:
/* Invalid tag, skip entry */
ret = ARCHIVE_WARN;
continue;
}
/*
* Without "default:" we expect mode in field 2
* Exception: Solaris other and mask fields
*/
if (permset == 0 && !ismode_w(field[n + 2 - sol].start,
field[n + 2 - sol].end, &permset)) {
/* Invalid mode, skip entry */
ret = ARCHIVE_WARN;
continue;
}
} else {
/* NFS4 ACLs */
s = field[0].start;
len = field[0].end - field[0].start;
tag = 0;
switch (len) {
case 4:
if (wmemcmp(s, L"user", 4) == 0)
tag = ARCHIVE_ENTRY_ACL_USER;
break;
case 5:
if (wmemcmp(s, L"group", 5) == 0)
tag = ARCHIVE_ENTRY_ACL_GROUP;
break;
case 6:
if (wmemcmp(s, L"owner@", 6) == 0)
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
else if (wmemcmp(s, L"group@", len) == 0)
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
break;
case 9:
if (wmemcmp(s, L"everyone@", 9) == 0)
tag = ARCHIVE_ENTRY_ACL_EVERYONE;
default:
break;
}
if (tag == 0) {
/* Invalid tag, skip entry */
ret = ARCHIVE_WARN;
continue;
} else if (tag == ARCHIVE_ENTRY_ACL_USER ||
tag == ARCHIVE_ENTRY_ACL_GROUP) {
n = 1;
name = field[1];
isint_w(name.start, name.end, &id);
} else
n = 0;
if (!is_nfs4_perms_w(field[1 + n].start,
field[1 + n].end, &permset)) {
/* Invalid NFSv4 perms, skip entry */
ret = ARCHIVE_WARN;
continue;
}
if (!is_nfs4_flags_w(field[2 + n].start,
field[2 + n].end, &permset)) {
/* Invalid NFSv4 flags, skip entry */
ret = ARCHIVE_WARN;
continue;
}
s = field[3 + n].start;
len = field[3 + n].end - field[3 + n].start;
type = 0;
if (len == 4) {
if (wmemcmp(s, L"deny", 4) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
} else if (len == 5) {
if (wmemcmp(s, L"allow", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
else if (wmemcmp(s, L"audit", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT;
else if (wmemcmp(s, L"alarm", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_ALARM;
}
if (type == 0) {
/* Invalid entry type, skip entry */
ret = ARCHIVE_WARN;
continue;
}
isint_w(field[4 + n].start, field[4 + n].end, &id);
}
/* Add entry to the internal list. */
r = archive_acl_add_entry_w_len(acl, type, permset,
tag, id, name.start, name.end - name.start);
if (r < ARCHIVE_WARN)
return (r);
if (r != ARCHIVE_OK)
ret = ARCHIVE_WARN;
types |= type;
}
/* Reset ACL */
archive_acl_reset(acl, types);
return (ret);
}
/*
* Parse a string to a positive decimal integer. Returns true if
* the string is non-empty and consists only of decimal digits,
* false otherwise.
*/
static int
isint_w(const wchar_t *start, const wchar_t *end, int *result)
{
int n = 0;
if (start >= end)
return (0);
while (start < end) {
if (*start < '0' || *start > '9')
return (0);
if (n > (INT_MAX / 10) ||
(n == INT_MAX / 10 && (*start - '0') > INT_MAX % 10)) {
n = INT_MAX;
} else {
n *= 10;
n += *start - '0';
}
start++;
}
*result = n;
return (1);
}
/*
* Parse a string as a mode field. Returns true if
* the string is non-empty and consists only of mode characters,
* false otherwise.
*/
static int
ismode_w(const wchar_t *start, const wchar_t *end, int *permset)
{
const wchar_t *p;
if (start >= end)
return (0);
p = start;
*permset = 0;
while (p < end) {
switch (*p++) {
case L'r': case L'R':
*permset |= ARCHIVE_ENTRY_ACL_READ;
break;
case L'w': case L'W':
*permset |= ARCHIVE_ENTRY_ACL_WRITE;
break;
case L'x': case L'X':
*permset |= ARCHIVE_ENTRY_ACL_EXECUTE;
break;
case L'-':
break;
default:
return (0);
}
}
return (1);
}
/*
* Parse a string as a NFS4 ACL permission field.
* Returns true if the string is non-empty and consists only of NFS4 ACL
* permission characters, false otherwise
*/
static int
is_nfs4_perms_w(const wchar_t *start, const wchar_t *end, int *permset)
{
const wchar_t *p = start;
while (p < end) {
switch (*p++) {
case L'r':
*permset |= ARCHIVE_ENTRY_ACL_READ_DATA;
break;
case L'w':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_DATA;
break;
case L'x':
*permset |= ARCHIVE_ENTRY_ACL_EXECUTE;
break;
case L'p':
*permset |= ARCHIVE_ENTRY_ACL_APPEND_DATA;
break;
case L'D':
*permset |= ARCHIVE_ENTRY_ACL_DELETE_CHILD;
break;
case L'd':
*permset |= ARCHIVE_ENTRY_ACL_DELETE;
break;
case L'a':
*permset |= ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES;
break;
case L'A':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES;
break;
case L'R':
*permset |= ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS;
break;
case L'W':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS;
break;
case L'c':
*permset |= ARCHIVE_ENTRY_ACL_READ_ACL;
break;
case L'C':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_ACL;
break;
case L'o':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_OWNER;
break;
case L's':
*permset |= ARCHIVE_ENTRY_ACL_SYNCHRONIZE;
break;
case L'-':
break;
default:
return(0);
}
}
return (1);
}
/*
* Parse a string as a NFS4 ACL flags field.
* Returns true if the string is non-empty and consists only of NFS4 ACL
* flag characters, false otherwise
*/
static int
is_nfs4_flags_w(const wchar_t *start, const wchar_t *end, int *permset)
{
const wchar_t *p = start;
while (p < end) {
switch(*p++) {
case L'f':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT;
break;
case L'd':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT;
break;
case L'i':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY;
break;
case L'n':
*permset |=
ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT;
break;
case L'S':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_SUCCESSFUL_ACCESS;
break;
case L'F':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_FAILED_ACCESS;
break;
case L'I':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_INHERITED;
break;
case L'-':
break;
default:
return (0);
}
}
return (1);
}
/*
* Match "[:whitespace:]*(.*)[:whitespace:]*[:,\n]". *wp is updated
* to point to just after the separator. *start points to the first
* character of the matched text and *end just after the last
* character of the matched identifier. In particular *end - *start
* is the length of the field body, not including leading or trailing
* whitespace.
*/
static void
next_field_w(const wchar_t **wp, const wchar_t **start,
const wchar_t **end, wchar_t *sep)
{
/* Skip leading whitespace to find start of field. */
while (**wp == L' ' || **wp == L'\t' || **wp == L'\n') {
(*wp)++;
}
*start = *wp;
/* Scan for the separator. */
while (**wp != L'\0' && **wp != L',' && **wp != L':' &&
**wp != L'\n' && **wp != L'#') {
(*wp)++;
}
*sep = **wp;
/* Locate end of field, trim trailing whitespace if necessary */
if (*wp == *start) {
*end = *wp;
} else {
*end = *wp - 1;
while (**end == L' ' || **end == L'\t' || **end == L'\n') {
(*end)--;
}
(*end)++;
}
/* Handle in-field comments */
if (*sep == L'#') {
while (**wp != L'\0' && **wp != L',' && **wp != L'\n') {
(*wp)++;
}
*sep = **wp;
}
/* Adjust scanner location. */
if (**wp != L'\0')
(*wp)++;
}
/*
* Parse an ACL text string.
*
* The want_type argument may be one of the following:
* ARCHIVE_ENTRY_ACL_TYPE_ACCESS - text is a POSIX.1e ACL of type ACCESS
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - text is a POSIX.1e ACL of type DEFAULT
* ARCHIVE_ENTRY_ACL_TYPE_NFS4 - text is as a NFSv4 ACL
*
* POSIX.1e ACL entries prefixed with "default:" are treated as
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT unless type is ARCHIVE_ENTRY_ACL_TYPE_NFS4
*/
int
archive_acl_from_text_l(struct archive_acl *acl, const char *text,
int want_type, struct archive_string_conv *sc)
{
struct {
const char *start;
const char *end;
} field[6], name;
const char *s, *st;
int numfields, fields, n, r, sol, ret;
int type, types, tag, permset, id;
size_t len;
char sep;
switch (want_type) {
case ARCHIVE_ENTRY_ACL_TYPE_POSIX1E:
want_type = ARCHIVE_ENTRY_ACL_TYPE_ACCESS;
__LA_FALLTHROUGH;
case ARCHIVE_ENTRY_ACL_TYPE_ACCESS:
case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT:
numfields = 5;
break;
case ARCHIVE_ENTRY_ACL_TYPE_NFS4:
numfields = 6;
break;
default:
return (ARCHIVE_FATAL);
}
ret = ARCHIVE_OK;
types = 0;
while (text != NULL && *text != '\0') {
/*
* Parse the fields out of the next entry,
* advance 'text' to start of next entry.
*/
fields = 0;
do {
const char *start, *end;
next_field(&text, &start, &end, &sep);
if (fields < numfields) {
field[fields].start = start;
field[fields].end = end;
}
++fields;
} while (sep == ':');
/* Set remaining fields to blank. */
for (n = fields; n < numfields; ++n)
field[n].start = field[n].end = NULL;
if (field[0].start != NULL && *(field[0].start) == '#') {
/* Comment, skip entry */
continue;
}
n = 0;
sol = 0;
id = -1;
permset = 0;
name.start = name.end = NULL;
if (want_type != ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
/* POSIX.1e ACLs */
/*
* Default keyword "default:user::rwx"
* if found, we have one more field
*
* We also support old Solaris extension:
* "defaultuser::rwx" is the default ACL corresponding
* to "user::rwx", etc. valid only for first field
*/
s = field[0].start;
len = field[0].end - field[0].start;
if (*s == 'd' && (len == 1 || (len >= 7
&& memcmp((s + 1), "efault", 6) == 0))) {
type = ARCHIVE_ENTRY_ACL_TYPE_DEFAULT;
if (len > 7)
field[0].start += 7;
else
n = 1;
} else
type = want_type;
/* Check for a numeric ID in field n+1 or n+3. */
isint(field[n + 1].start, field[n + 1].end, &id);
/* Field n+3 is optional. */
if (id == -1 && fields > (n + 3))
isint(field[n + 3].start, field[n + 3].end,
&id);
tag = 0;
s = field[n].start;
st = field[n].start + 1;
len = field[n].end - field[n].start;
if (len == 0) {
ret = ARCHIVE_WARN;
continue;
}
switch (*s) {
case 'u':
if (len == 1 || (len == 4
&& memcmp(st, "ser", 3) == 0))
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
break;
case 'g':
if (len == 1 || (len == 5
&& memcmp(st, "roup", 4) == 0))
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
break;
case 'o':
if (len == 1 || (len == 5
&& memcmp(st, "ther", 4) == 0))
tag = ARCHIVE_ENTRY_ACL_OTHER;
break;
case 'm':
if (len == 1 || (len == 4
&& memcmp(st, "ask", 3) == 0))
tag = ARCHIVE_ENTRY_ACL_MASK;
break;
default:
break;
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_OTHER:
case ARCHIVE_ENTRY_ACL_MASK:
if (fields == (n + 2)
&& field[n + 1].start < field[n + 1].end
&& ismode(field[n + 1].start,
field[n + 1].end, &permset)) {
/* This is Solaris-style "other:rwx" */
sol = 1;
} else if (fields == (n + 3) &&
field[n + 1].start < field[n + 1].end) {
/* Invalid mask or other field */
ret = ARCHIVE_WARN;
continue;
}
break;
case ARCHIVE_ENTRY_ACL_USER_OBJ:
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
if (id != -1 ||
field[n + 1].start < field[n + 1].end) {
name = field[n + 1];
if (tag == ARCHIVE_ENTRY_ACL_USER_OBJ)
tag = ARCHIVE_ENTRY_ACL_USER;
else
tag = ARCHIVE_ENTRY_ACL_GROUP;
}
break;
default:
/* Invalid tag, skip entry */
ret = ARCHIVE_WARN;
continue;
}
/*
* Without "default:" we expect mode in field 3
* Exception: Solaris other and mask fields
*/
if (permset == 0 && !ismode(field[n + 2 - sol].start,
field[n + 2 - sol].end, &permset)) {
/* Invalid mode, skip entry */
ret = ARCHIVE_WARN;
continue;
}
} else {
/* NFS4 ACLs */
s = field[0].start;
len = field[0].end - field[0].start;
tag = 0;
switch (len) {
case 4:
if (memcmp(s, "user", 4) == 0)
tag = ARCHIVE_ENTRY_ACL_USER;
break;
case 5:
if (memcmp(s, "group", 5) == 0)
tag = ARCHIVE_ENTRY_ACL_GROUP;
break;
case 6:
if (memcmp(s, "owner@", 6) == 0)
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
else if (memcmp(s, "group@", 6) == 0)
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
break;
case 9:
if (memcmp(s, "everyone@", 9) == 0)
tag = ARCHIVE_ENTRY_ACL_EVERYONE;
break;
default:
break;
}
if (tag == 0) {
/* Invalid tag, skip entry */
ret = ARCHIVE_WARN;
continue;
} else if (tag == ARCHIVE_ENTRY_ACL_USER ||
tag == ARCHIVE_ENTRY_ACL_GROUP) {
n = 1;
name = field[1];
isint(name.start, name.end, &id);
} else
n = 0;
if (!is_nfs4_perms(field[1 + n].start,
field[1 + n].end, &permset)) {
/* Invalid NFSv4 perms, skip entry */
ret = ARCHIVE_WARN;
continue;
}
if (!is_nfs4_flags(field[2 + n].start,
field[2 + n].end, &permset)) {
/* Invalid NFSv4 flags, skip entry */
ret = ARCHIVE_WARN;
continue;
}
s = field[3 + n].start;
len = field[3 + n].end - field[3 + n].start;
type = 0;
if (len == 4) {
if (memcmp(s, "deny", 4) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
} else if (len == 5) {
if (memcmp(s, "allow", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
else if (memcmp(s, "audit", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT;
else if (memcmp(s, "alarm", 5) == 0)
type = ARCHIVE_ENTRY_ACL_TYPE_ALARM;
}
if (type == 0) {
/* Invalid entry type, skip entry */
ret = ARCHIVE_WARN;
continue;
}
isint(field[4 + n].start, field[4 + n].end,
&id);
}
/* Add entry to the internal list. */
r = archive_acl_add_entry_len_l(acl, type, permset,
tag, id, name.start, name.end - name.start, sc);
if (r < ARCHIVE_WARN)
return (r);
if (r != ARCHIVE_OK)
ret = ARCHIVE_WARN;
types |= type;
}
/* Reset ACL */
archive_acl_reset(acl, types);
return (ret);
}
/*
* Parse a string to a positive decimal integer. Returns true if
* the string is non-empty and consists only of decimal digits,
* false otherwise.
*/
static int
isint(const char *start, const char *end, int *result)
{
int n = 0;
if (start >= end)
return (0);
while (start < end) {
if (*start < '0' || *start > '9')
return (0);
if (n > (INT_MAX / 10) ||
(n == INT_MAX / 10 && (*start - '0') > INT_MAX % 10)) {
n = INT_MAX;
} else {
n *= 10;
n += *start - '0';
}
start++;
}
*result = n;
return (1);
}
/*
* Parse a string as a mode field. Returns true if
* the string is non-empty and consists only of mode characters,
* false otherwise.
*/
static int
ismode(const char *start, const char *end, int *permset)
{
const char *p;
if (start >= end)
return (0);
p = start;
*permset = 0;
while (p < end) {
switch (*p++) {
case 'r': case 'R':
*permset |= ARCHIVE_ENTRY_ACL_READ;
break;
case 'w': case 'W':
*permset |= ARCHIVE_ENTRY_ACL_WRITE;
break;
case 'x': case 'X':
*permset |= ARCHIVE_ENTRY_ACL_EXECUTE;
break;
case '-':
break;
default:
return (0);
}
}
return (1);
}
/*
* Parse a string as a NFS4 ACL permission field.
* Returns true if the string is non-empty and consists only of NFS4 ACL
* permission characters, false otherwise
*/
static int
is_nfs4_perms(const char *start, const char *end, int *permset)
{
const char *p = start;
while (p < end) {
switch (*p++) {
case 'r':
*permset |= ARCHIVE_ENTRY_ACL_READ_DATA;
break;
case 'w':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_DATA;
break;
case 'x':
*permset |= ARCHIVE_ENTRY_ACL_EXECUTE;
break;
case 'p':
*permset |= ARCHIVE_ENTRY_ACL_APPEND_DATA;
break;
case 'D':
*permset |= ARCHIVE_ENTRY_ACL_DELETE_CHILD;
break;
case 'd':
*permset |= ARCHIVE_ENTRY_ACL_DELETE;
break;
case 'a':
*permset |= ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES;
break;
case 'A':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES;
break;
case 'R':
*permset |= ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS;
break;
case 'W':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS;
break;
case 'c':
*permset |= ARCHIVE_ENTRY_ACL_READ_ACL;
break;
case 'C':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_ACL;
break;
case 'o':
*permset |= ARCHIVE_ENTRY_ACL_WRITE_OWNER;
break;
case 's':
*permset |= ARCHIVE_ENTRY_ACL_SYNCHRONIZE;
break;
case '-':
break;
default:
return(0);
}
}
return (1);
}
/*
* Parse a string as a NFS4 ACL flags field.
* Returns true if the string is non-empty and consists only of NFS4 ACL
* flag characters, false otherwise
*/
static int
is_nfs4_flags(const char *start, const char *end, int *permset)
{
const char *p = start;
while (p < end) {
switch(*p++) {
case 'f':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT;
break;
case 'd':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT;
break;
case 'i':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY;
break;
case 'n':
*permset |=
ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT;
break;
case 'S':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_SUCCESSFUL_ACCESS;
break;
case 'F':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_FAILED_ACCESS;
break;
case 'I':
*permset |= ARCHIVE_ENTRY_ACL_ENTRY_INHERITED;
break;
case '-':
break;
default:
return (0);
}
}
return (1);
}
/*
* Match "[:whitespace:]*(.*)[:whitespace:]*[:,\n]". *wp is updated
* to point to just after the separator. *start points to the first
* character of the matched text and *end just after the last
* character of the matched identifier. In particular *end - *start
* is the length of the field body, not including leading or trailing
* whitespace.
*/
static void
next_field(const char **p, const char **start,
const char **end, char *sep)
{
/* Skip leading whitespace to find start of field. */
while (**p == ' ' || **p == '\t' || **p == '\n') {
(*p)++;
}
*start = *p;
/* Scan for the separator. */
while (**p != '\0' && **p != ',' && **p != ':' && **p != '\n' &&
**p != '#') {
(*p)++;
}
*sep = **p;
/* Locate end of field, trim trailing whitespace if necessary */
if (*p == *start) {
*end = *p;
} else {
*end = *p - 1;
while (**end == ' ' || **end == '\t' || **end == '\n') {
(*end)--;
}
(*end)++;
}
/* Handle in-field comments */
if (*sep == '#') {
while (**p != '\0' && **p != ',' && **p != '\n') {
(*p)++;
}
*sep = **p;
}
/* Adjust scanner location. */
if (**p != '\0')
(*p)++;
}
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