#include <system.h>
#include <fnmatch.h>
#include <hash.h>
#include <quotearg.h>
#include "common.h"
struct group *getgrnam ();
struct passwd *getpwnam ();
#if ! HAVE_DECL_GETPWUID
struct passwd *getpwuid ();
#endif
#if ! HAVE_DECL_GETGRGID
struct group *getgrgid ();
#endif
static char *cached_uname;
static char *cached_gname;
static uid_t cached_uid;
static gid_t cached_gid;
static char *cached_no_such_uname;
static char *cached_no_such_gname;
static uid_t cached_no_such_uid;
static gid_t cached_no_such_gid;
static void register_individual_file (char const *name);
void
uid_to_uname (uid_t uid, char **uname)
{
struct passwd *passwd;
if (uid != 0 && uid == cached_no_such_uid)
{
*uname = xstrdup ("");
return;
}
if (!cached_uname || uid != cached_uid)
{
passwd = getpwuid (uid);
if (passwd)
{
cached_uid = uid;
assign_string (&cached_uname, passwd->pw_name);
}
else
{
cached_no_such_uid = uid;
*uname = xstrdup ("");
return;
}
}
*uname = xstrdup (cached_uname);
}
void
gid_to_gname (gid_t gid, char **gname)
{
struct group *group;
if (gid != 0 && gid == cached_no_such_gid)
{
*gname = xstrdup ("");
return;
}
if (!cached_gname || gid != cached_gid)
{
group = getgrgid (gid);
if (group)
{
cached_gid = gid;
assign_string (&cached_gname, group->gr_name);
}
else
{
cached_no_such_gid = gid;
*gname = xstrdup ("");
return;
}
}
*gname = xstrdup (cached_gname);
}
int
uname_to_uid (char const *uname, uid_t *uidp)
{
struct passwd *passwd;
if (cached_no_such_uname
&& strcmp (uname, cached_no_such_uname) == 0)
return 0;
if (!cached_uname
|| uname[0] != cached_uname[0]
|| strcmp (uname, cached_uname) != 0)
{
passwd = getpwnam (uname);
if (passwd)
{
cached_uid = passwd->pw_uid;
assign_string (&cached_uname, passwd->pw_name);
}
else
{
assign_string (&cached_no_such_uname, uname);
return 0;
}
}
*uidp = cached_uid;
return 1;
}
int
gname_to_gid (char const *gname, gid_t *gidp)
{
struct group *group;
if (cached_no_such_gname
&& strcmp (gname, cached_no_such_gname) == 0)
return 0;
if (!cached_gname
|| gname[0] != cached_gname[0]
|| strcmp (gname, cached_gname) != 0)
{
group = getgrnam (gname);
if (group)
{
cached_gid = group->gr_gid;
assign_string (&cached_gname, gname);
}
else
{
assign_string (&cached_no_such_gname, gname);
return 0;
}
}
*gidp = cached_gid;
return 1;
}
static struct name *namelist;
static struct name **nametail = &namelist;
#define NELT_NAME 0
#define NELT_CHDIR 1
#define NELT_FMASK 2
struct name_elt
{
char type;
union
{
const char *name;
int matching_flags;
} v;
};
static struct name_elt *name_array;
static size_t allocated_names;
static size_t names;
static size_t name_index;
static void
check_name_alloc ()
{
if (names == allocated_names)
{
if (allocated_names == 0)
allocated_names = 10;
name_array = x2nrealloc (name_array, &allocated_names,
sizeof (name_array[0]));
}
}
void
name_add_name (const char *name, int matching_flags)
{
static int prev_flags = 0;
struct name_elt *ep;
check_name_alloc ();
ep = &name_array[names++];
if (prev_flags != matching_flags)
{
ep->type = NELT_FMASK;
ep->v.matching_flags = matching_flags;
prev_flags = matching_flags;
check_name_alloc ();
ep = &name_array[names++];
}
ep->type = NELT_NAME;
ep->v.name = name;
}
void
name_add_dir (const char *name)
{
struct name_elt *ep;
check_name_alloc ();
ep = &name_array[names++];
ep->type = NELT_CHDIR;
ep->v.name = name;
}
static char *name_buffer;
static size_t name_buffer_length;
void
name_init (void)
{
name_buffer = xmalloc (NAME_FIELD_SIZE + 2);
name_buffer_length = NAME_FIELD_SIZE;
}
void
name_term (void)
{
free (name_buffer);
free (name_array);
}
static int matching_flags;
struct name_elt *
name_next_elt (int change_dirs)
{
static struct name_elt entry;
const char *source;
char *cursor;
if (filename_terminator == '\0')
change_dirs = 0;
while (name_index != names)
{
struct name_elt *ep;
size_t source_len;
ep = &name_array[name_index++];
if (ep->type == NELT_FMASK)
{
matching_flags = ep->v.matching_flags;
continue;
}
source = ep->v.name;
source_len = strlen (source);
if (name_buffer_length < source_len)
{
do
{
name_buffer_length *= 2;
if (! name_buffer_length)
xalloc_die ();
}
while (name_buffer_length < source_len);
free (name_buffer);
name_buffer = xmalloc (name_buffer_length + 2);
}
strcpy (name_buffer, source);
cursor = name_buffer + strlen (name_buffer) - 1;
while (cursor > name_buffer && ISSLASH (*cursor))
*cursor-- = '\0';
if (change_dirs && ep->type == NELT_CHDIR)
{
if (chdir (name_buffer) < 0)
chdir_fatal (name_buffer);
}
else
{
if (unquote_option)
unquote_string (name_buffer);
if (incremental_option)
register_individual_file (name_buffer);
entry.type = ep->type;
entry.v.name = name_buffer;
return &entry;
}
}
return NULL;
}
const char *
name_next (int change_dirs)
{
struct name_elt *nelt = name_next_elt (change_dirs);
return nelt ? nelt->v.name : NULL;
}
void
name_gather (void)
{
static struct name *buffer;
static size_t allocated_size;
struct name_elt *ep;
if (same_order_option)
{
static int change_dir;
if (allocated_size == 0)
{
allocated_size = offsetof (struct name, name) + NAME_FIELD_SIZE + 1;
buffer = xmalloc (allocated_size);
memset (buffer, 0, allocated_size);
}
while ((ep = name_next_elt (0)) && ep->type == NELT_CHDIR)
change_dir = chdir_arg (xstrdup (ep->v.name));
if (ep)
{
size_t needed_size;
buffer->length = strlen (ep->v.name);
needed_size = offsetof (struct name, name) + buffer->length + 1;
if (allocated_size < needed_size)
{
do
{
allocated_size *= 2;
if (! allocated_size)
xalloc_die ();
}
while (allocated_size < needed_size);
buffer = xrealloc (buffer, allocated_size);
}
buffer->change_dir = change_dir;
strcpy (buffer->name, ep->v.name);
buffer->next = 0;
buffer->found_count = 0;
buffer->matching_flags = matching_flags;
namelist = buffer;
nametail = &namelist->next;
}
else if (change_dir)
addname (0, change_dir);
}
else
{
int change_dir = 0;
for (;;)
{
int change_dir0 = change_dir;
while ((ep = name_next_elt (0)) && ep->type == NELT_CHDIR)
change_dir = chdir_arg (xstrdup (ep->v.name));
if (ep)
addname (ep->v.name, change_dir);
else
{
if (change_dir != change_dir0)
addname (0, change_dir);
break;
}
}
}
}
struct name *
addname (char const *string, int change_dir)
{
size_t length = string ? strlen (string) : 0;
struct name *name = xmalloc (offsetof (struct name, name) + length + 1);
if (string)
strcpy (name->name, string);
else
name->name[0] = 0;
name->next = NULL;
name->length = length;
name->found_count = 0;
name->matching_flags = matching_flags;
name->change_dir = change_dir;
name->dir_contents = NULL;
*nametail = name;
nametail = &name->next;
return name;
}
static struct name *
namelist_match (char const *file_name, size_t length)
{
struct name *p;
for (p = namelist; p; p = p->next)
{
if (p->name[0]
&& exclude_fnmatch (p->name, file_name, p->matching_flags))
return p;
}
return NULL;
}
bool
name_match (const char *file_name)
{
size_t length = strlen (file_name);
while (1)
{
struct name *cursor = namelist;
if (!cursor)
return true;
if (cursor->name[0] == 0)
{
chdir_do (cursor->change_dir);
namelist = 0;
nametail = &namelist;
return true;
}
cursor = namelist_match (file_name, length);
if (cursor)
{
if (!(ISSLASH (file_name[cursor->length]) && recursion_option)
|| cursor->found_count == 0)
cursor->found_count++;
if (starting_file_option)
{
free (namelist);
namelist = 0;
nametail = &namelist;
}
chdir_do (cursor->change_dir);
return ISFOUND (cursor);
}
if (same_order_option && namelist->found_count)
{
name_gather ();
if (namelist->found_count)
return false;
}
else
return false;
}
}
bool
all_names_found (struct tar_stat_info *p)
{
struct name const *cursor;
size_t len;
if (test_label_option)
return true;
if (!p->file_name || occurrence_option == 0 || p->had_trailing_slash)
return false;
len = strlen (p->file_name);
for (cursor = namelist; cursor; cursor = cursor->next)
{
if ((cursor->name[0] && !WASFOUND (cursor))
|| (len >= cursor->length && ISSLASH (p->file_name[cursor->length])))
return false;
}
return true;
}
static inline int
is_pattern (const char *string)
{
return strchr (string, '*') || strchr (string, '[') || strchr (string, '?');
}
static void
regex_usage_warning (const char *name)
{
static int warned_once = 0;
if (warn_regex_usage && is_pattern (name))
{
warned_once = 1;
WARN ((0, 0,
_("Pattern matching characters used in file names. Please,")));
WARN ((0, 0,
_("use --wildcards to enable pattern matching, or --no-wildcards to")));
WARN ((0, 0,
_("suppress this warning.")));
}
}
void
names_notfound (void)
{
struct name const *cursor;
for (cursor = namelist; cursor; cursor = cursor->next)
if (!WASFOUND (cursor) && cursor->name[0])
{
regex_usage_warning (cursor->name);
if (cursor->found_count == 0)
ERROR ((0, 0, _("%s: Not found in archive"),
quotearg_colon (cursor->name)));
else
ERROR ((0, 0, _("%s: Required occurrence not found in archive"),
quotearg_colon (cursor->name)));
}
namelist = 0;
nametail = &namelist;
if (same_order_option)
{
const char *name;
while ((name = name_next (1)) != NULL)
{
regex_usage_warning (name);
ERROR ((0, 0, _("%s: Not found in archive"),
quotearg_colon (name)));
}
}
}
static struct name *
merge_sort (struct name *list, int length,
int (*compare) (struct name const*, struct name const*))
{
struct name *first_list;
struct name *second_list;
int first_length;
int second_length;
struct name *result;
struct name **merge_point;
struct name *cursor;
int counter;
# define SUCCESSOR(name) ((name)->next)
if (length == 1)
return list;
if (length == 2)
{
if ((*compare) (list, SUCCESSOR (list)) > 0)
{
result = SUCCESSOR (list);
SUCCESSOR (result) = list;
SUCCESSOR (list) = 0;
return result;
}
return list;
}
first_list = list;
first_length = (length + 1) / 2;
second_length = length / 2;
for (cursor = list, counter = first_length - 1;
counter;
cursor = SUCCESSOR (cursor), counter--)
continue;
second_list = SUCCESSOR (cursor);
SUCCESSOR (cursor) = 0;
first_list = merge_sort (first_list, first_length, compare);
second_list = merge_sort (second_list, second_length, compare);
merge_point = &result;
while (first_list && second_list)
if ((*compare) (first_list, second_list) < 0)
{
cursor = SUCCESSOR (first_list);
*merge_point = first_list;
merge_point = &SUCCESSOR (first_list);
first_list = cursor;
}
else
{
cursor = SUCCESSOR (second_list);
*merge_point = second_list;
merge_point = &SUCCESSOR (second_list);
second_list = cursor;
}
if (first_list)
*merge_point = first_list;
else
*merge_point = second_list;
return result;
#undef SUCCESSOR
}
static int
compare_names (struct name const *n1, struct name const *n2)
{
int found_diff = WASFOUND(n2) - WASFOUND(n1);
return found_diff ? found_diff : strcmp (n1->name, n2->name);
}
static void
add_hierarchy_to_namelist (struct name *name, dev_t device)
{
char *file_name = name->name;
char *buffer = get_directory_contents (file_name, device);
if (! buffer)
name->dir_contents = "\0\0\0\0";
else
{
size_t name_length = name->length;
size_t allocated_length = (name_length >= NAME_FIELD_SIZE
? name_length + NAME_FIELD_SIZE
: NAME_FIELD_SIZE);
char *namebuf = xmalloc (allocated_length + 1);
char *string;
size_t string_length;
int change_dir = name->change_dir;
name->dir_contents = buffer;
strcpy (namebuf, file_name);
if (! ISSLASH (namebuf[name_length - 1]))
{
namebuf[name_length++] = '/';
namebuf[name_length] = '\0';
}
for (string = buffer; *string; string += string_length + 1)
{
string_length = strlen (string);
if (*string == 'D')
{
struct name *np;
if (allocated_length <= name_length + string_length)
{
do
{
allocated_length *= 2;
if (! allocated_length)
xalloc_die ();
}
while (allocated_length <= name_length + string_length);
namebuf = xrealloc (namebuf, allocated_length + 1);
}
strcpy (namebuf + name_length, string + 1);
np = addname (namebuf, change_dir);
add_hierarchy_to_namelist (np, device);
}
}
free (namebuf);
}
}
void
collect_and_sort_names (void)
{
struct name *name;
struct name *next_name;
int num_names;
struct stat statbuf;
name_gather ();
if (listed_incremental_option)
read_directory_file ();
if (!namelist)
addname (".", 0);
for (name = namelist; name; name = next_name)
{
next_name = name->next;
if (name->found_count || name->dir_contents)
continue;
if (name->matching_flags & EXCLUDE_WILDCARDS)
continue;
chdir_do (name->change_dir);
if (name->name[0] == 0)
continue;
if (deref_stat (dereference_option, name->name, &statbuf) != 0)
{
stat_diag (name->name);
continue;
}
if (S_ISDIR (statbuf.st_mode))
{
name->found_count++;
add_hierarchy_to_namelist (name, statbuf.st_dev);
}
}
num_names = 0;
for (name = namelist; name; name = name->next)
num_names++;
namelist = merge_sort (namelist, num_names, compare_names);
for (name = namelist; name; name = name->next)
name->found_count = 0;
if (listed_incremental_option)
{
for (name = namelist; name && name->name[0] == 0; name++)
;
if (name)
name->dir_contents = append_incremental_renames (name->dir_contents);
}
}
struct name *
name_scan (const char *file_name)
{
size_t length = strlen (file_name);
while (1)
{
struct name *cursor = namelist_match (file_name, length);
if (cursor)
return cursor;
if (same_order_option && namelist && namelist->found_count)
{
name_gather ();
if (namelist->found_count)
return 0;
}
else
return 0;
}
}
struct name *gnu_list_name;
char *
name_from_list (void)
{
if (!gnu_list_name)
gnu_list_name = namelist;
while (gnu_list_name
&& (gnu_list_name->found_count || gnu_list_name->name[0] == 0))
gnu_list_name = gnu_list_name->next;
if (gnu_list_name)
{
gnu_list_name->found_count++;
chdir_do (gnu_list_name->change_dir);
return gnu_list_name->name;
}
return 0;
}
void
blank_name_list (void)
{
struct name *name;
gnu_list_name = 0;
for (name = namelist; name; name = name->next)
name->found_count = 0;
}
char *
new_name (const char *file_name, const char *name)
{
size_t file_name_len = strlen (file_name);
size_t namesize = strlen (name) + 1;
int slash = file_name_len && ! ISSLASH (file_name[file_name_len - 1]);
char *buffer = xmalloc (file_name_len + slash + namesize);
memcpy (buffer, file_name, file_name_len);
buffer[file_name_len] = '/';
memcpy (buffer + file_name_len + slash, name, namesize);
return buffer;
}
bool
excluded_name (char const *name)
{
return excluded_file_name (excluded, name + FILE_SYSTEM_PREFIX_LEN (name));
}
static Hash_table *avoided_name_table;
void
add_avoided_name (char const *name)
{
hash_string_insert (&avoided_name_table, name);
}
bool
is_avoided_name (char const *name)
{
return hash_string_lookup (avoided_name_table, name);
}
static Hash_table *individual_file_table;
static void
register_individual_file (char const *name)
{
struct stat st;
if (deref_stat (dereference_option, name, &st) != 0)
return;
if (S_ISDIR (st.st_mode))
return;
hash_string_insert (&individual_file_table, name);
}
bool
is_individual_file (char const *name)
{
return hash_string_lookup (individual_file_table, name);
}
size_t
stripped_prefix_len (char const *file_name, size_t num)
{
char const *p = file_name + FILE_SYSTEM_PREFIX_LEN (file_name);
while (ISSLASH (*p))
p++;
while (*p)
{
bool slash = ISSLASH (*p);
p++;
if (slash)
{
if (--num == 0)
return p - file_name;
while (ISSLASH (*p))
p++;
}
}
return -1;
}
bool
contains_dot_dot (char const *name)
{
char const *p = name + FILE_SYSTEM_PREFIX_LEN (name);
for (;; p++)
{
if (p[0] == '.' && p[1] == '.' && (ISSLASH (p[2]) || !p[2]))
return 1;
while (! ISSLASH (*p))
{
if (! *p++)
return 0;
}
}
}