1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 */ 6 7 #include <android_cmds.h> 8 9 #include <common.h> 10 #include <part.h> 11 12 /** 13 * part_get_info_by_dev_and_name - Parse a device number and partition name 14 * string in the form of "device_num;partition_name", for example "0;misc". 15 * If the partition is found, sets dev_desc and part_info accordingly with the 16 * information of the partition with the given partition_name. 17 * 18 * @dev_iface: Device interface. 19 * @dev_part_str: Input string argument, like "0;misc". 20 * @dev_desc: Place to store the device description pointer. 21 * @part_info: Place to store the partition information. 22 * @return 0 on success, or -1 on error 23 */ 24 static int part_get_info_by_dev_and_name(const char *dev_iface, 25 const char *dev_part_str, 26 struct blk_desc **dev_desc, 27 disk_partition_t *part_info) 28 { 29 char *ep; 30 const char *part_str; 31 int dev_num; 32 33 part_str = strchr(dev_part_str, ';'); 34 if (!part_str || part_str == dev_part_str) 35 return -1; 36 37 dev_num = simple_strtoul(dev_part_str, &ep, 16); 38 if (ep != part_str) { 39 /* Not all the first part before the ; was parsed. */ 40 return -1; 41 } 42 part_str++; 43 44 *dev_desc = blk_get_dev(dev_iface, dev_num); 45 if (!*dev_desc) { 46 printf("Could not find %s %d\n", dev_iface, dev_num); 47 return -1; 48 } 49 if (part_get_info_by_name(*dev_desc, part_str, part_info) < 0) { 50 printf("Could not find \"%s\" partition\n", part_str); 51 return -1; 52 } 53 return 0; 54 } 55 56 int part_get_info_by_dev_and_name_or_num(const char *dev_iface, 57 const char *dev_part_str, 58 struct blk_desc **dev_desc, 59 disk_partition_t *part_info) { 60 /* Split the part_name if passed as "$dev_num;part_name". */ 61 if (!part_get_info_by_dev_and_name(dev_iface, dev_part_str, 62 dev_desc, part_info)) 63 return 0; 64 /* Couldn't lookup by name, try looking up the partition description 65 * directly. 66 */ 67 if (blk_get_device_part_str(dev_iface, dev_part_str, 68 dev_desc, part_info, 1) < 0) { 69 printf("Couldn't find partition %s %s\n", 70 dev_iface, dev_part_str); 71 return -1; 72 } 73 return 0; 74 } 75
