**--map-user=**__uid|name__::
Run the program only after the current effective user ID has been mapped to _uid_. If this option is specified multiple times, the last occurrence takes precedence. This option implies *--user*.
-**--map-users=**__outeruid,inneruid,count__|**auto**::
+**--map-users=**__inneruid:outeruid:count__|**auto**::
Run the program only after the block of user IDs of size _count_ beginning at _outeruid_ has been mapped to the block of user IDs beginning at _inneruid_. This mapping is created with **newuidmap**(1). If the range of user IDs overlaps with the mapping specified by *--map-user*, then a "hole" will be removed from the mapping. This may result in the highest user ID of the mapping not being mapped. The special value *auto* will map the first block of user IDs owned by the effective user from _/etc/subuid_ to a block starting at user ID 0. If this option is specified multiple times, the last occurrence takes precedence. This option implies *--user*.
++
+Before util-linux version 2.39, this option expected a comma-separated argument of the form _outeruid,inneruid,count_ but that format is now deprecated for consistency with the ordering used in _/proc/[pid]/uid_map_ and the _X-mount.idmap_ mount option.
**--map-group=**__gid|name__::
Run the program only after the current effective group ID has been mapped to _gid_. If this option is specified multiple times, the last occurrence takes precedence. This option implies *--setgroups=deny* and *--user*.
-**--map-groups=**__outergid,innergid,count__|**auto**::
+**--map-groups=**__innergid:outergid:count__|**auto**::
Run the program only after the block of group IDs of size _count_ beginning at _outergid_ has been mapped to the block of group IDs beginning at _innergid_. This mapping is created with **newgidmap**(1). If the range of group IDs overlaps with the mapping specified by *--map-group*, then a "hole" will be removed from the mapping. This may result in the highest group ID of the mapping not being mapped. The special value *auto* will map the first block of user IDs owned by the effective user from _/etc/subgid_ to a block starting at group ID 0. If this option is specified multiple times, the last occurrence takes precedence. This option implies *--user*.
++
+Before util-linux version 2.39, this option expected a comma-separated argument of the form _outergid,innergid,count_ but that format is now deprecated for consistency with the ordering used in _/proc/[pid]/gid_map_ and the _X-mount.idmap_ mount option.
**--map-auto**::
Map the first block of user IDs owned by the effective user from _/etc/subuid_ to a block starting at user ID 0. In the same manner, also map the first block of group IDs owned by the effective group from _/etc/subgid_ to a block starting at group ID 0. This option is intended to handle the common case where the first block of subordinate user and group IDs can map the whole user and group ID space. This option is equivalent to specifying *--map-users=auto* and *--map-groups=auto*.
#define UID_BUFSIZ sizeof(stringify_value(ULONG_MAX))
-/**
- * uint_to_id() - Convert a string into a user/group ID
- * @name: The string representation of the ID
- * @sz: The length of @name, without an (optional) nul-terminator
- *
- * This converts a (possibly not nul-terminated_ string into user or group ID.
- * No name lookup is performed.
- *
- * Return: @name as a numeric ID
- */
-static int uint_to_id(const char *name, size_t sz)
-{
- char buf[UID_BUFSIZ];
-
- mem2strcpy(buf, name, sz, sizeof(buf));
- return strtoul_or_err(buf, _("could not parse ID"));
-}
-
/**
* get_map_range() - Parse a mapping range from a string
- * @s: A string of the format outer,inner,count
+ * @s: A string of the format inner:outer:count or outer,inner,count
*
- * Parse a string of the form outer,inner,count into a new mapping range.
+ * Parse a string of the form inner:outer:count or outer,inner,count into
+ * a new mapping range.
*
* Return: A new &struct map_range
*/
static struct map_range *get_map_range(const char *s)
{
- int n, map[3];
+ int end;
struct map_range *ret;
- n = string_to_idarray(s, map, ARRAY_SIZE(map), uint_to_id);
- if (n < 0)
- errx(EXIT_FAILURE, _("too many elements for mapping '%s'"), s);
- if (n != ARRAY_SIZE(map))
- errx(EXIT_FAILURE, _("mapping '%s' contains only %d elements"),
- s, n);
-
ret = xmalloc(sizeof(*ret));
- ret->outer = map[0];
- ret->inner = map[1];
- ret->count = map[2];
- return ret;
+
+ if (sscanf(s, "%u:%u:%u%n", &ret->inner, &ret->outer, &ret->count,
+ &end) >= 3 && !s[end])
+ return ret; /* inner:outer:count */
+
+ if (sscanf(s, "%u,%u,%u%n", &ret->outer, &ret->inner, &ret->count,
+ &end) >= 3 && !s[end])
+ return ret; /* outer,inner,count */
+
+ errx(EXIT_FAILURE, _("invalid mapping '%s'"), s);
}
/**
fputs(_(" -r, --map-root-user map current user to root (implies --user)\n"), out);
fputs(_(" -c, --map-current-user map current user to itself (implies --user)\n"), out);
fputs(_(" --map-auto map users and groups automatically (implies --user)\n"), out);
- fputs(_(" --map-users=<outeruid>,<inneruid>,<count>\n"
+ fputs(_(" --map-users=<inneruid>:<outeruid>:<count>\n"
" map count users from outeruid to inneruid (implies --user)\n"), out);
- fputs(_(" --map-groups=<outergid>,<innergid>,<count>\n"
+ fputs(_(" --map-groups=<innergid>:<outergid>:<count>\n"
" map count groups from outergid to innergid (implies --user)\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(_(" --kill-child[=<signame>] when dying, kill the forked child (implies --fork)\n"