1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
.\" Copyright (c) 2014 Xin Li <delphij@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd March 5, 2014
.Dt ZOPEN 3
.Os
.Sh NAME
.Nm zopen
.Nd open a gzip compressed stream
.Sh LIBRARY
.Lb libz
.Sh SYNOPSIS
.Ft FILE *
.Fn zopen "const char *path" "const char *mode"
.Sh DESCRIPTION
The
.Fn zopen
opens a gzip file whose name is the string pointed to by
.Fa path
and associates a stream with it.
It is a wrapper around
.Xr zlib 3
and standard stream I/O APIs.
.Pp
The argument
.Fa mode
have the same meaning as it does in
.Xr fopen 3 .
.Pp
The
.Nm
function will associate read, write, seek and close
functions of
.Xr zlib 3
after successfully opened a file with
.Xr funopen 3
so that they will be used to read or write the new stream.
.Sh RETURN VALUES
Upon successful completion
.Nm
returns a
.Tn FILE
pointer.
Otherwise,
.Dv NULL
is returned and the global variable
.Va errno
is set to indicate the error.
.Sh ERRORS
In addition to the errors documented for
.Xr fopen 3 ,
the
.Nm
function may also fail for:
.Bl -tag -width Er
.It Bq Er ENOMEM
Insufficient memory is available.
.El
.Sh COMPATIBILITY
This implementation of
.Nm
function first appeared in
.Nx 1.6
and
.Fx 4.5 .
The
.Nm
function may not be portable to systems other than
.Fx .
.Sh SEE ALSO
.Xr fopen 3 ,
.Xr funopen 3 ,
.Xr zlib 3
|
