eessppeelllloo/cryptsetup
1
0
Fork 0
mirror of https://gitlab.com/cryptsetup/cryptsetup.git synced 2025-12-06 00:10:04 +01:00
Code Issues Packages Projects Releases Wiki Activity

Move string_to_size to userspace tools.

Browse Source
This commit is contained in:
Milan Broz
2015-08-21 13:24:59 +02:00
parent 5a8b045bdd
commit 7843415243
5 changed files with 68 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
lib/utils_crypt.c
View File

@@ -490,68 +490,3 @@ ssize_t crypt_hex_to_bytes(const char *hex, char **result, int safe_alloc)
*result = bytes;
return i;
}
/*
* Device size string parsing, suffixes:
* s|S - 512 bytes sectors
* k |K |m |M |g |G |t |T - 1024 base
* kiB|KiB|miB|MiB|giB|GiB|tiB|TiB - 1024 base
* kb |KB |mM |MB |gB |GB |tB |TB - 1000 base
*/
int crypt_string_to_size(struct crypt_device *cd, const char *s, uint64_t *size)
{
char *endp = NULL;
size_t len;
uint64_t mult_base, mult, tmp;
*size = strtoull(s, &endp, 10);
if (!isdigit(s[0]) ||
(errno == ERANGE && *size == ULLONG_MAX) ||
(errno != 0 && *size == 0))
return -EINVAL;
if (!endp || !*endp)
return 0;
len = strlen(endp);
/* Allow "B" and "iB" suffixes */
if (len > 3 ||
(len == 3 && (endp[1] != 'i' || endp[2] != 'B')) ||
(len == 2 && endp[1] != 'B'))
return -EINVAL;
if (len == 1 || len == 3)
mult_base = 1024;
else
mult_base = 1000;
mult = 1;
switch (endp[0]) {
case 's':
case 'S': mult = 512;
break;
case 't':
case 'T': mult *= mult_base;
/* Fall through */
case 'g':
case 'G': mult *= mult_base;
/* Fall through */
case 'm':
case 'M': mult *= mult_base;
/* Fall through */
case 'k':
case 'K': mult *= mult_base;
break;
default:
return -EINVAL;
}
tmp = *size * mult;
if ((tmp / *size) != mult) {
log_dbg("Device size overflow.");
return -EINVAL;
}
*size = tmp;
return 0;
}