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strict_strtoul
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
NAME
strict_strtoul - convert a string to an unsigned long strictlySYNOPSIS
- int strict_strtoul(const char * cp, unsigned int base, unsigned long * res);
ARGUMENTS
cp
- The string to be converted
base
- The number base to use
res
- The converted result value
DESCRIPTION
strict_strtoul converts a string to an unsigned long only if the string is really an unsigned long string, any string containing any invalid char at the tail will be rejected and -EINVAL is returned, only a newline char at the tail is acceptible because people generally
CHANGE A MODULE PARAMETER IN THE FOLLOWING WAY
echo 1024 > /sys/module/e1000/parameters/copybreak
echo will append a newline to the tail.
It returns 0 if conversion is successful and *res is set to the converted value, otherwise it returns -EINVAL and *res is set to 0.
simple_strtoul just ignores the successive invalid characters and return the converted value of prefix part of the string.
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