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__BITMAP_PARSELIST(9) Basic Kernel Library Functions __BITMAP_PARSELIST(9)

NAME

__bitmap_parselist - convert list format ASCII string to bitmap

SYNOPSIS

int __bitmap_parselist(const char * buf, unsigned int buflen, int is_user, unsigned long * maskp, int nmaskbits);

ARGUMENTS

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

DESCRIPTION

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

COPYRIGHT

February 2017 Kernel Hackers Manual 3.16