| |
| #include <ctype.h> |
| |
| #include "nls.h" |
| #include "fdiskP.h" |
| |
| /** |
| * SECTION: parttype |
| * @title: Partition types |
| * @short_description: abstraction to partition types |
| * |
| * There are two basic types of parttypes, string based (e.g. GPT) |
| * and code/hex based (e.g. MBR). |
| */ |
| |
| /** |
| * fdisk_new_parttype: |
| * |
| * It's recommended to use fdisk_label_get_parttype_from_code() or |
| * fdisk_label_get_parttype_from_string() for well known types rather |
| * than allocate a new instance. |
| * |
| * Returns: new instance. |
| */ |
| struct fdisk_parttype *fdisk_new_parttype(void) |
| { |
| struct fdisk_parttype *t = calloc(1, sizeof(*t)); |
| |
| t->refcount = 1; |
| t->flags = FDISK_PARTTYPE_ALLOCATED; |
| DBG(PARTTYPE, ul_debugobj(t, "alloc")); |
| return t; |
| } |
| |
| /** |
| * fdisk_ref_parttype: |
| * @t: partition type |
| * |
| * Incremparts reference counter for allocated types |
| */ |
| void fdisk_ref_parttype(struct fdisk_parttype *t) |
| { |
| if (fdisk_parttype_is_allocated(t)) |
| t->refcount++; |
| } |
| |
| /** |
| * fdisk_unref_parttype |
| * @t: partition pointer |
| * |
| * De-incremparts reference counter, on zero the @t is automatically |
| * deallocated. |
| */ |
| void fdisk_unref_parttype(struct fdisk_parttype *t) |
| { |
| if (!fdisk_parttype_is_allocated(t)) |
| return; |
| |
| t->refcount--; |
| if (t->refcount <= 0) { |
| DBG(PARTTYPE, ul_debugobj(t, "free")); |
| free(t->typestr); |
| free(t->name); |
| free(t); |
| } |
| } |
| |
| /** |
| * fdisk_parttype_set_name: |
| * @t: partition type |
| * @str: type name |
| * |
| * Sets type name to allocated partition type, for static types |
| * it returns -EINVAL. |
| * |
| * Return: 0 on success, <0 on error |
| */ |
| int fdisk_parttype_set_name(struct fdisk_parttype *t, const char *str) |
| { |
| char *p = NULL; |
| |
| if (!t || !fdisk_parttype_is_allocated(t)) |
| return -EINVAL; |
| if (str) { |
| p = strdup(str); |
| if (!p) |
| return -ENOMEM; |
| } |
| |
| free(t->name); |
| t->name = p; |
| return 0; |
| } |
| |
| /** |
| * fdisk_parttype_set_typestr: |
| * @t: partition type |
| * @str: type identificator (e.g. GUID for GPT) |
| * |
| * Sets type string to allocated partition type, for static types |
| * it returns -EINVAL. Don't use this function for MBR, see |
| * fdisk_parttype_set_code(). |
| * |
| * Return: 0 on success, <0 on error |
| */ |
| int fdisk_parttype_set_typestr(struct fdisk_parttype *t, const char *str) |
| { |
| char *p = NULL; |
| |
| if (!t || !fdisk_parttype_is_allocated(t)) |
| return -EINVAL; |
| if (str) { |
| p = strdup(str); |
| if (!p) |
| return -ENOMEM; |
| } |
| |
| free(t->typestr); |
| t->typestr = p; |
| return 0; |
| } |
| |
| /** |
| * fdisk_parttype_set_code: |
| * @t: partition type |
| * @code: type identificator (e.g. MBR type codes) |
| * |
| * Sets type code to allocated partition type, for static types it returns |
| * -EINVAL. Don't use this function for GPT, see fdisk_parttype_set_typestr(). |
| * |
| * Return: 0 on success, <0 on error |
| */ |
| int fdisk_parttype_set_code(struct fdisk_parttype *t, int code) |
| { |
| if (!t || !fdisk_parttype_is_allocated(t)) |
| return -EINVAL; |
| t->code = code; |
| return 0; |
| } |
| |
| /** |
| * fdisk_label_get_nparttypes: |
| * @lb: label |
| * |
| * Returns: number of types supported by label. |
| */ |
| size_t fdisk_label_get_nparttypes(const struct fdisk_label *lb) |
| { |
| if (!lb) |
| return 0; |
| return lb->nparttypes; |
| } |
| |
| /** |
| * fdisk_label_get_parttype: |
| * @lb: label |
| * @n: number |
| * |
| * Returns: return parttype |
| */ |
| struct fdisk_parttype *fdisk_label_get_parttype(const struct fdisk_label *lb, size_t n) |
| { |
| if (!lb || n >= lb->nparttypes) |
| return NULL; |
| return &lb->parttypes[n]; |
| } |
| |
| /** |
| * fdisk_label_has_code_parttypes: |
| * @lb: label |
| * |
| * Returns: 1 if the label uses code as partition type |
| * identifiers (e.g. MBR) or 0. |
| */ |
| int fdisk_label_has_code_parttypes(const struct fdisk_label *lb) |
| { |
| assert(lb); |
| |
| if (lb->parttypes && lb->parttypes[0].typestr) |
| return 0; |
| return 1; |
| } |
| |
| |
| /** |
| * fdisk_label_get_parttype_from_code: |
| * @lb: label |
| * @code: code to search for |
| * |
| * Search for partition type in label-specific table. The result |
| * is pointer to static array of label types. |
| * |
| * Returns: partition type or NULL upon failure or invalid @code. |
| */ |
| struct fdisk_parttype *fdisk_label_get_parttype_from_code( |
| const struct fdisk_label *lb, |
| unsigned int code) |
| { |
| size_t i; |
| |
| assert(lb); |
| |
| if (!lb->nparttypes) |
| return NULL; |
| |
| for (i = 0; i < lb->nparttypes; i++) |
| if (lb->parttypes[i].code == code) |
| return &lb->parttypes[i]; |
| return NULL; |
| } |
| |
| /** |
| * fdisk_label_get_parttype_from_string: |
| * @lb: label |
| * @str: string to search for |
| * |
| * Search for partition type in label-specific table. The result |
| * is pointer to static array of label types. |
| * |
| * Returns: partition type or NULL upon failure or invalid @str. |
| */ |
| struct fdisk_parttype *fdisk_label_get_parttype_from_string( |
| const struct fdisk_label *lb, |
| const char *str) |
| { |
| size_t i; |
| |
| assert(lb); |
| |
| if (!lb->nparttypes) |
| return NULL; |
| |
| for (i = 0; i < lb->nparttypes; i++) |
| if (lb->parttypes[i].typestr |
| && strcasecmp(lb->parttypes[i].typestr, str) == 0) |
| return &lb->parttypes[i]; |
| |
| return NULL; |
| } |
| |
| /** |
| * fdisk_new_unknown_parttype: |
| * @code: type as number |
| * @typestr: type as string |
| |
| * Allocates new 'unknown' partition type. Use fdisk_unref_parttype() to |
| * deallocate. |
| * |
| * Returns: newly allocated partition type, or NULL upon failure. |
| */ |
| struct fdisk_parttype *fdisk_new_unknown_parttype(unsigned int code, |
| const char *typestr) |
| { |
| struct fdisk_parttype *t = fdisk_new_parttype(); |
| |
| if (!t) |
| return NULL; |
| |
| fdisk_parttype_set_name(t, _("unknown")); |
| fdisk_parttype_set_code(t, code); |
| fdisk_parttype_set_typestr(t, typestr); |
| t->flags |= FDISK_PARTTYPE_UNKNOWN; |
| |
| return t; |
| } |
| |
| /** |
| * fdisk_copy_parttype: |
| * @type: type to copy |
| * |
| * Use fdisk_unref_parttype() to deallocate. |
| * |
| * Returns: newly allocated partition type, or NULL upon failure. |
| */ |
| struct fdisk_parttype *fdisk_copy_parttype(const struct fdisk_parttype *type) |
| { |
| struct fdisk_parttype *t = fdisk_new_parttype(); |
| |
| if (!t) |
| return NULL; |
| |
| fdisk_parttype_set_name(t, type->name); |
| fdisk_parttype_set_code(t, type->code); |
| fdisk_parttype_set_typestr(t, type->typestr); |
| |
| return t; |
| } |
| |
| /** |
| * fdisk_label_parse_parttype: |
| * @lb: label |
| * @str: string to parse from |
| * |
| * Parses partition type from @str according to the label. Thefunction returns |
| * a pointer to static table of the partition types, or newly allocated |
| * partition type for unknown types (see fdisk_parttype_is_unknown(). It's |
| * safe to call fdisk_unref_parttype() for all results. |
| * |
| * Returns: pointer to type or NULL on error. |
| */ |
| struct fdisk_parttype *fdisk_label_parse_parttype( |
| const struct fdisk_label *lb, |
| const char *str) |
| { |
| struct fdisk_parttype *types, *ret; |
| unsigned int code = 0; |
| char *typestr = NULL, *end = NULL; |
| |
| assert(lb); |
| |
| if (!lb->nparttypes) |
| return NULL; |
| |
| DBG(LABEL, ul_debugobj((void *) lb, "parsing '%s' (%s) partition type", |
| str, lb->name)); |
| types = lb->parttypes; |
| |
| if (types[0].typestr == NULL && isxdigit(*str)) { |
| |
| errno = 0; |
| code = strtol(str, &end, 16); |
| |
| if (errno || *end != '\0') { |
| DBG(LABEL, ul_debugobj((void *) lb, "parsing failed: %m")); |
| return NULL; |
| } |
| ret = fdisk_label_get_parttype_from_code(lb, code); |
| if (ret) |
| goto done; |
| } else { |
| int i; |
| |
| /* maybe specified by type string (e.g. UUID) */ |
| ret = fdisk_label_get_parttype_from_string(lb, str); |
| if (ret) |
| goto done; |
| |
| /* maybe specified by order number */ |
| errno = 0; |
| i = strtol(str, &end, 0); |
| if (errno == 0 && *end == '\0' && i > 0 |
| && i - 1 < (int) lb->nparttypes) { |
| ret = &types[i - 1]; |
| goto done; |
| } |
| } |
| |
| ret = fdisk_new_unknown_parttype(code, typestr); |
| done: |
| DBG(PARTTYPE, ul_debugobj(ret, "returns parsed '%s' partition type", ret->name)); |
| return ret; |
| } |
| |
| /** |
| * fdisk_parttype_get_string: |
| * @t: type |
| * |
| * Returns: partition type string (e.g. GUID for GPT) |
| */ |
| const char *fdisk_parttype_get_string(const struct fdisk_parttype *t) |
| { |
| assert(t); |
| return t->typestr && *t->typestr ? t->typestr : NULL; |
| } |
| |
| /** |
| * fdisk_parttype_get_code: |
| * @t: type |
| * |
| * Returns: partition type code (e.g. for MBR) |
| */ |
| unsigned int fdisk_parttype_get_code(const struct fdisk_parttype *t) |
| { |
| assert(t); |
| return t->code; |
| } |
| |
| /** |
| * fdisk_parttype_get_name: |
| * @t: type |
| * |
| * Returns: partition type human readable name |
| */ |
| const char *fdisk_parttype_get_name(const struct fdisk_parttype *t) |
| { |
| assert(t); |
| return t->name; |
| } |
| |
| /** |
| * fdisk_parttype_is_unknown: |
| * @t: type |
| * |
| * Checks for example result from fdisk_label_parse_parttype(). |
| * |
| * Returns: 1 is type is "unknonw" or 0. |
| */ |
| int fdisk_parttype_is_unknown(const struct fdisk_parttype *t) |
| { |
| return t && (t->flags & FDISK_PARTTYPE_UNKNOWN) ? 1 : 0; |
| } |