'\" t
.\" Title: function::user_string_n_warn
.\" Author:
.\" Generator: DocBook XSL Stylesheets vsnapshot
.\" Date: November 2023
.\" Manual: String and data retrieving functions Tapset
.\" Source: SystemTap Tapset Reference
.\" Language: English
.\"
.TH "FUNCTION::USER_STRIN" "3stap" "November 2023" "SystemTap Tapset Reference" "String and data retrieving fun"
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.SH "NAME"
function::user_string_n_warn \- Retrieves string from user space
.SH "SYNOPSIS"
.sp
.nf
1) user_string_n_warn:string(addr:long,n:long)
.fi
.sp
.nf
2) user_string_n_warn:string(addr:long,n:long,warn_msg:string)
.fi
.SH "ARGUMENTS"
.PP
\fIaddr\fR
.RS 4
the user space address to retrieve the string from
.RE
.PP
\fIn\fR
.RS 4
the maximum length of the string (if not null terminated)
.RE
.PP
\fIwarn_msg\fR
.RS 4
the warning message to return when data isn\*(Aqt available
.RE
.SH "DESCRIPTION"
.PP
1) Returns up to n characters of a C string from a given user space memory address\&. Reports\(lq\(rq
on the rare cases when userspace data is not accessible and warns (but does not abort) about the failure\&.
.PP
2) Returns up to n characters of a C string from a given user space memory address\&. Reports the given warning message on the rare cases when userspace data is not accessible and warns (but does not abort) about the failure\&.
.SH SEE ALSO\n
.IR tapset::uconversions (3stap)