cryb-to/lib/core/cryb_strlcpy.3

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.\"-
.\" Copyright (c) 2015 The University of Oslo
.\" Copyright (c) 2016-2017 Dag-Erling Smørgrav
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.\" All rights reserved.
.\"
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.Dd May 2, 2017
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.Dt cryb_strlcpy 3
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.Os
.Sh NAME
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.Nm cryb_strlcpy
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.Nd safely copy a string into a buffer
.Sh LIBRARY
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.Lb libcryb
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.Sh SYNOPSIS
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.In stddef.h
.In cryb/strlcpy.h
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.Ft size_t
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.Fn cryb_strlcpy "char *dst" "const char *src" "size_t size"
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.Sh DESCRIPTION
The
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.Nm cryb_strlcpy
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function copies the NUL-terminated string pointed to by
.Va src
into the buffer pointed to by
.Va dst .
The
.Va size
argument specifies the total size of the buffer, including the space
required for the terminating NUL character.
If the length of the string exceeds the available space, the result is
truncated.
In either case, the destination buffer is properly NUL-terminated.
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.Sh RETURN VALUES
The
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.Fn cryb_strlcpy
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function returns the length of the original string.
If this number is equal to or greater than the value of
.Va size ,
the string was too long to fit in the buffer.
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.Sh IMPLEMENTATION NOTES
If the
.Dv HAVE_STRLCPY
preprocessor macro is defined to 0 or undefined, the
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.In cryb/strlcpy.h
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header provides a
.Fn strlcpy
macro as an alias to
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.Fn cryb_strlcpy .
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.Sh SEE ALSO
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.Xr cryb_strlcat 3
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.Sh AUTHORS
The
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.Fn cryb_strlcpy
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function and this manual page were written for the University of Oslo
by
.An Dag-Erling Sm\(/orgrav Aq Mt d.e.smorgrav@usit.uio.no .