.Dd January 15, 2017
.Dt GZGETS 3
.Os
.
.Sh NAME
.Nm gzgets
.Nd read line from compressed file
.
.Sh LIBRARY
.Lb libz
.
.Sh SYNOPSIS
.In zlib.h
.Ft char *
.Fn gzgets "gzFile file" "char *buf" "int len"
.
.Sh DESCRIPTION
Reads bytes from the compressed file
until
.Fa len-1
characters are read,
or a newline character
is read and transferred to
.Fa buf ,
or an end-of-file condition
is encountered.
If any characters are read or if
.Fa len
== 1,
the string is terminated
with a null character.
If no characters are read
due to an end-of-file or
.Fa len
< 1,
then the buffer is left untouched.
.
.Sh RETURN VALUES
.Fn gzgets
returns
.Fa buf
which is a null-terminated string,
or it returns
.Dv NULL
for end-of-file
or in case of error.
If there was an error,
the contents at
.Fa buf
are indeterminate.