__bitmap_parselist — convert list format ASCII string to bitmap
int __bitmap_parselist ( | const char * buf, |
unsigned int buflen, | |
int is_user, | |
unsigned long * maskp, | |
int nmaskbits) ; |
buf
read nul-terminated user string from this buffer
buflen
buffer size in bytes. If string is smaller than this then it must be terminated with a \0.
is_user
location of buffer, 0 indicates kernel space
maskp
write resulting mask here
nmaskbits
number of bits in mask to be written
Input format is a comma-separated list of decimal numbers and ranges. Consecutively set bits are shown as two hyphen-separated decimal numbers, the smallest and largest bit numbers set in the range.
Returns 0 on success, -errno on invalid input strings.
Error values:
-EINVAL
: second number in range smaller than first
-EINVAL
: invalid character in string
-ERANGE
: bit number specified too large for mask