| FUNCTION::USER_STRIN(3stap) | String and data retrieving fun | FUNCTION::USER_STRIN(3stap) |
NAME¶
function::user_string_n - Retrieves string of given length from user space
SYNOPSIS¶
1) user_string_n:string(addr:long,n:long)
2) user_string_n:string(addr:long,n:long,err_msg:string)
ARGUMENTS¶
addr
the user space address to retrieve the string from
n
the maximum length of the string (if not null
terminated)
err_msg
the error message to return when data isn't
available
DESCRIPTION¶
1) Returns the C string of a maximum given length from a given user space address. Reports an error on the rare cases when userspace data is not accessible at the given address.
2) Returns the C string of a maximum given length from a given user space address. Returns the given error message string on the rare cases when userspace data is not accessible at the given address.
SEE ALSO0¶
tapset::uconversions(3stap)
SEE ALSO0¶
tapset::uconversions(3stap)
| April 2023 | SystemTap Tapset Reference |