CMake/Utilities/cmlibarchive/libarchive/archive_acl.c

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/*-
* Copyright (c) 2003-2010 Tim Kientzle
* 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 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 void next_field_w(const wchar_t **wp, const wchar_t **start,
const wchar_t **end, wchar_t *sep);
static int prefix_w(const wchar_t *start, const wchar_t *end,
const wchar_t *test);
static void append_entry_w(wchar_t **wp, const wchar_t *prefix, int tag,
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 void next_field(const char **p, const char **start,
const char **end, char *sep);
static int prefix_c(const char *start, const char *end,
const char *test);
static void append_entry(char **p, const char *prefix, int tag,
const char *name, int perm, int id);
static void append_id(char **p, int id);
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;
}
if (acl->acl_text_w != NULL) {
free(acl->acl_text_w);
acl->acl_text_w = NULL;
}
if (acl->acl_text != NULL) {
free(acl->acl_text);
acl->acl_text = NULL;
}
acl->acl_p = NULL;
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);
}
if (acl->acl_text_w != NULL) {
free(acl->acl_text_w);
acl->acl_text_w = NULL;
}
if (acl->acl_text != NULL) {
free(acl->acl_text);
acl->acl_text = NULL;
}
/* If there's a matching entry already in the list, overwrite it. */
ap = acl->acl_head;
aq = NULL;
while (ap != NULL) {
if (ap->type == type && ap->tag == tag && ap->id == id) {
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 *)malloc(sizeof(*ap));
if (ap == NULL)
return (NULL);
memset(ap, 0, sizeof(*ap));
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);
}
/*
* 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);
}
/*
* Generate a text version of the ACL. The flags parameter controls
* the style of the generated ACL.
*/
const wchar_t *
archive_acl_text_w(struct archive *a, struct archive_acl *acl, int flags)
{
int count;
size_t length;
const wchar_t *wname;
const wchar_t *prefix;
wchar_t separator;
struct archive_acl_entry *ap;
int id, r;
wchar_t *wp;
if (acl->acl_text_w != NULL) {
free (acl->acl_text_w);
acl->acl_text_w = NULL;
}
separator = L',';
count = 0;
length = 0;
ap = acl->acl_head;
while (ap != NULL) {
if ((ap->type & flags) != 0) {
count++;
if ((flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT) &&
(ap->type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT))
length += 8; /* "default:" */
length += 5; /* tag name */
length += 1; /* colon */
r = archive_mstring_get_wcs(a, &ap->name, &wname);
if (r == 0 && wname != NULL)
length += wcslen(wname);
else if (r < 0 && errno == ENOMEM)
return (NULL);
else
length += sizeof(uid_t) * 3 + 1;
length ++; /* colon */
length += 3; /* rwx */
length += 1; /* colon */
length += max(sizeof(uid_t), sizeof(gid_t)) * 3 + 1;
length ++; /* newline */
}
ap = ap->next;
}
if (count > 0 && ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0)) {
length += 10; /* "user::rwx\n" */
length += 11; /* "group::rwx\n" */
length += 11; /* "other::rwx\n" */
}
if (count == 0)
return (NULL);
/* Now, allocate the string and actually populate it. */
wp = acl->acl_text_w = (wchar_t *)malloc(length * sizeof(wchar_t));
if (wp == NULL)
return (NULL);
count = 0;
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_USER_OBJ, NULL,
acl->mode & 0700, -1);
*wp++ = ',';
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_GROUP_OBJ, NULL,
acl->mode & 0070, -1);
*wp++ = ',';
append_entry_w(&wp, NULL, ARCHIVE_ENTRY_ACL_OTHER, NULL,
acl->mode & 0007, -1);
count += 3;
ap = acl->acl_head;
while (ap != NULL) {
if ((ap->type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
r = archive_mstring_get_wcs(a, &ap->name, &wname);
if (r == 0) {
*wp++ = separator;
if (flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID)
id = ap->id;
else
id = -1;
append_entry_w(&wp, NULL, ap->tag, wname,
ap->permset, id);
count++;
} else if (r < 0 && errno == ENOMEM)
return (NULL);
}
ap = ap->next;
}
}
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) {
if (flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT)
prefix = L"default:";
else
prefix = NULL;
ap = acl->acl_head;
count = 0;
while (ap != NULL) {
if ((ap->type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) {
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->tag,
wname, ap->permset, id);
count ++;
} else if (r < 0 && errno == ENOMEM)
return (NULL);
}
ap = ap->next;
}
}
return (acl->acl_text_w);
}
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 tag,
const wchar_t *wname, int perm, int id)
{
if (prefix != NULL) {
wcscpy(*wp, prefix);
*wp += wcslen(*wp);
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
wname = NULL;
id = -1;
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_USER:
wcscpy(*wp, L"user");
break;
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
wname = NULL;
id = -1;
/* 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;
}
*wp += wcslen(*wp);
*(*wp)++ = L':';
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);
id = -1;
}
*(*wp)++ = L':';
*(*wp)++ = (perm & 0444) ? L'r' : L'-';
*(*wp)++ = (perm & 0222) ? L'w' : L'-';
*(*wp)++ = (perm & 0111) ? L'x' : L'-';
if (id != -1) {
*(*wp)++ = L':';
append_id_w(wp, id);
}
**wp = L'\0';
}
int
archive_acl_text_l(struct archive_acl *acl, int flags,
const char **acl_text, size_t *acl_text_len,
struct archive_string_conv *sc)
{
int count;
size_t length;
const char *name;
const char *prefix;
char separator;
struct archive_acl_entry *ap;
size_t len;
int id, r;
char *p;
if (acl->acl_text != NULL) {
free (acl->acl_text);
acl->acl_text = NULL;
}
*acl_text = NULL;
if (acl_text_len != NULL)
*acl_text_len = 0;
separator = ',';
count = 0;
length = 0;
ap = acl->acl_head;
while (ap != NULL) {
if ((ap->type & flags) != 0) {
count++;
if ((flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT) &&
(ap->type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT))
length += 8; /* "default:" */
length += 5; /* tag name */
length += 1; /* colon */
r = archive_mstring_get_mbs_l(
&ap->name, &name, &len, sc);
if (r != 0)
return (-1);
if (len > 0 && name != NULL)
length += len;
else
length += sizeof(uid_t) * 3 + 1;
length ++; /* colon */
length += 3; /* rwx */
length += 1; /* colon */
length += max(sizeof(uid_t), sizeof(gid_t)) * 3 + 1;
length ++; /* newline */
}
ap = ap->next;
}
if (count > 0 && ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0)) {
length += 10; /* "user::rwx\n" */
length += 11; /* "group::rwx\n" */
length += 11; /* "other::rwx\n" */
}
if (count == 0)
return (0);
/* Now, allocate the string and actually populate it. */
p = acl->acl_text = (char *)malloc(length);
if (p == NULL)
return (-1);
count = 0;
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) {
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_USER_OBJ, NULL,
acl->mode & 0700, -1);
*p++ = ',';
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_GROUP_OBJ, NULL,
acl->mode & 0070, -1);
*p++ = ',';
append_entry(&p, NULL, ARCHIVE_ENTRY_ACL_OTHER, NULL,
acl->mode & 0007, -1);
count += 3;
for (ap = acl->acl_head; ap != NULL; ap = ap->next) {
if ((ap->type & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) == 0)
continue;
r = archive_mstring_get_mbs_l(
&ap->name, &name, &len, sc);
if (r != 0)
return (-1);
*p++ = separator;
if (flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID)
id = ap->id;
else
id = -1;
append_entry(&p, NULL, ap->tag, name,
ap->permset, id);
count++;
}
}
if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) {
if (flags & ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT)
prefix = "default:";
else
prefix = NULL;
count = 0;
for (ap = acl->acl_head; ap != NULL; ap = ap->next) {
if ((ap->type & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) == 0)
continue;
r = archive_mstring_get_mbs_l(
&ap->name, &name, &len, sc);
if (r != 0)
return (-1);
if (count > 0)
*p++ = separator;
if (flags & ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID)
id = ap->id;
else
id = -1;
append_entry(&p, prefix, ap->tag,
name, ap->permset, id);
count ++;
}
}
*acl_text = acl->acl_text;
if (acl_text_len != NULL)
*acl_text_len = strlen(acl->acl_text);
return (0);
}
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 tag,
const char *name, int perm, int id)
{
if (prefix != NULL) {
strcpy(*p, prefix);
*p += strlen(*p);
}
switch (tag) {
case ARCHIVE_ENTRY_ACL_USER_OBJ:
name = NULL;
id = -1;
/* FALLTHROUGH */
case ARCHIVE_ENTRY_ACL_USER:
strcpy(*p, "user");
break;
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
name = NULL;
id = -1;
/* 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;
}
*p += strlen(*p);
*(*p)++ = ':';
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);
id = -1;
}
*(*p)++ = ':';
*(*p)++ = (perm & 0444) ? 'r' : '-';
*(*p)++ = (perm & 0222) ? 'w' : '-';
*(*p)++ = (perm & 0111) ? 'x' : '-';
if (id != -1) {
*(*p)++ = ':';
append_id(p, id);
}
**p = '\0';
}
/*
* Parse a textual ACL. This automatically recognizes and supports
* extensions described above. The 'type' argument is used to
* indicate the type that should be used for any entries not
* explicitly marked as "default:".
*/
int
archive_acl_parse_w(struct archive_acl *acl,
const wchar_t *text, int default_type)
{
struct {
const wchar_t *start;
const wchar_t *end;
} field[4], name;
int fields, n;
int type, tag, permset, id;
wchar_t sep;
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 < 4) {
field[fields].start = start;
field[fields].end = end;
}
++fields;
} while (sep == L':');
/* Set remaining fields to blank. */
for (n = fields; n < 4; ++n)
field[n].start = field[n].end = NULL;
/* Check for a numeric ID in field 1 or 3. */
id = -1;
isint_w(field[1].start, field[1].end, &id);
/* Field 3 is optional. */
if (id == -1 && fields > 3)
isint_w(field[3].start, field[3].end, &id);
/*
* Solaris extension: "defaultuser::rwx" is the
* default ACL corresponding to "user::rwx", etc.
*/
if (field[0].end - field[0].start > 7
&& wmemcmp(field[0].start, L"default", 7) == 0) {
type = ARCHIVE_ENTRY_ACL_TYPE_DEFAULT;
field[0].start += 7;
} else
type = default_type;
name.start = name.end = NULL;
if (prefix_w(field[0].start, field[0].end, L"user")) {
if (!ismode_w(field[2].start, field[2].end, &permset))
return (ARCHIVE_WARN);
if (id != -1 || field[1].start < field[1].end) {
tag = ARCHIVE_ENTRY_ACL_USER;
name = field[1];
} else
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
} else if (prefix_w(field[0].start, field[0].end, L"group")) {
if (!ismode_w(field[2].start, field[2].end, &permset))
return (ARCHIVE_WARN);
if (id != -1 || field[1].start < field[1].end) {
tag = ARCHIVE_ENTRY_ACL_GROUP;
name = field[1];
} else
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
} else if (prefix_w(field[0].start, field[0].end, L"other")) {
if (fields == 2
&& field[1].start < field[1].end
&& ismode_w(field[1].start, field[1].end, &permset)) {
/* This is Solaris-style "other:rwx" */
} else if (fields == 3
&& field[1].start == field[1].end
&& field[2].start < field[2].end
&& ismode_w(field[2].start, field[2].end, &permset)) {
/* This is FreeBSD-style "other::rwx" */
} else
return (ARCHIVE_WARN);
tag = ARCHIVE_ENTRY_ACL_OTHER;
} else if (prefix_w(field[0].start, field[0].end, L"mask")) {
if (fields == 2
&& field[1].start < field[1].end
&& ismode_w(field[1].start, field[1].end, &permset)) {
/* This is Solaris-style "mask:rwx" */
} else if (fields == 3
&& field[1].start == field[1].end
&& field[2].start < field[2].end
&& ismode_w(field[2].start, field[2].end, &permset)) {
/* This is FreeBSD-style "mask::rwx" */
} else
return (ARCHIVE_WARN);
tag = ARCHIVE_ENTRY_ACL_MASK;
} else
return (ARCHIVE_WARN);
/* Add entry to the internal list. */
archive_acl_add_entry_w_len(acl, type, permset,
tag, id, name.start, name.end - name.start);
}
return (ARCHIVE_OK);
}
/*
* 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 '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);
}
/*
* 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)++;
}
*sep = **wp;
/* Trim trailing whitespace to locate end of field. */
*end = *wp - 1;
while (**end == L' ' || **end == L'\t' || **end == L'\n') {
(*end)--;
}
(*end)++;
/* Adjust scanner location. */
if (**wp != L'\0')
(*wp)++;
}
/*
* Return true if the characters [start...end) are a prefix of 'test'.
* This makes it easy to handle the obvious abbreviations: 'u' for 'user', etc.
*/
static int
prefix_w(const wchar_t *start, const wchar_t *end, const wchar_t *test)
{
if (start == end)
return (0);
if (*start++ != *test++)
return (0);
while (start < end && *start++ == *test++)
;
if (start < end)
return (0);
return (1);
}
/*
* Parse a textual ACL. This automatically recognizes and supports
* extensions described above. The 'type' argument is used to
* indicate the type that should be used for any entries not
* explicitly marked as "default:".
*/
int
archive_acl_parse_l(struct archive_acl *acl,
const char *text, int default_type, struct archive_string_conv *sc)
{
struct {
const char *start;
const char *end;
} field[4], name;
int fields, n, r, ret = ARCHIVE_OK;
int type, tag, permset, id;
char sep;
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 < 4) {
field[fields].start = start;
field[fields].end = end;
}
++fields;
} while (sep == ':');
/* Set remaining fields to blank. */
for (n = fields; n < 4; ++n)
field[n].start = field[n].end = NULL;
/* Check for a numeric ID in field 1 or 3. */
id = -1;
isint(field[1].start, field[1].end, &id);
/* Field 3 is optional. */
if (id == -1 && fields > 3)
isint(field[3].start, field[3].end, &id);
/*
* Solaris extension: "defaultuser::rwx" is the
* default ACL corresponding to "user::rwx", etc.
*/
if (field[0].end - field[0].start > 7
&& memcmp(field[0].start, "default", 7) == 0) {
type = ARCHIVE_ENTRY_ACL_TYPE_DEFAULT;
field[0].start += 7;
} else
type = default_type;
name.start = name.end = NULL;
if (prefix_c(field[0].start, field[0].end, "user")) {
if (!ismode(field[2].start, field[2].end, &permset))
return (ARCHIVE_WARN);
if (id != -1 || field[1].start < field[1].end) {
tag = ARCHIVE_ENTRY_ACL_USER;
name = field[1];
} else
tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
} else if (prefix_c(field[0].start, field[0].end, "group")) {
if (!ismode(field[2].start, field[2].end, &permset))
return (ARCHIVE_WARN);
if (id != -1 || field[1].start < field[1].end) {
tag = ARCHIVE_ENTRY_ACL_GROUP;
name = field[1];
} else
tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
} else if (prefix_c(field[0].start, field[0].end, "other")) {
if (fields == 2
&& field[1].start < field[1].end
&& ismode(field[1].start, field[1].end, &permset)) {
/* This is Solaris-style "other:rwx" */
} else if (fields == 3
&& field[1].start == field[1].end
&& field[2].start < field[2].end
&& ismode(field[2].start, field[2].end, &permset)) {
/* This is FreeBSD-style "other::rwx" */
} else
return (ARCHIVE_WARN);
tag = ARCHIVE_ENTRY_ACL_OTHER;
} else if (prefix_c(field[0].start, field[0].end, "mask")) {
if (fields == 2
&& field[1].start < field[1].end
&& ismode(field[1].start, field[1].end, &permset)) {
/* This is Solaris-style "mask:rwx" */
} else if (fields == 3
&& field[1].start == field[1].end
&& field[2].start < field[2].end
&& ismode(field[2].start, field[2].end, &permset)) {
/* This is FreeBSD-style "mask::rwx" */
} else
return (ARCHIVE_WARN);
tag = ARCHIVE_ENTRY_ACL_MASK;
} else
return (ARCHIVE_WARN);
/* 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;
}
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);
}
/*
* 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)++;
}
*sep = **p;
/* Trim trailing whitespace to locate end of field. */
*end = *p - 1;
while (**end == ' ' || **end == '\t' || **end == '\n') {
(*end)--;
}
(*end)++;
/* Adjust scanner location. */
if (**p != '\0')
(*p)++;
}
/*
* Return true if the characters [start...end) are a prefix of 'test'.
* This makes it easy to handle the obvious abbreviations: 'u' for 'user', etc.
*/
static int
prefix_c(const char *start, const char *end, const char *test)
{
if (start == end)
return (0);
if (*start++ != *test++)
return (0);
while (start < end && *start++ == *test++)
;
if (start < end)
return (0);
return (1);
}