1 .\" Copyright (c) 2003-2007 Tim Kientzle
2 .\" All rights reserved.
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25 .\" $FreeBSD: src/lib/libarchive/archive_util.3,v 1.7 2007/05/29 01:00:19 kientzle Exp $
31 .Nm archive_clear_error ,
32 .Nm archive_compression ,
33 .Nm archive_compression_name ,
34 .Nm archive_copy_error ,
36 .Nm archive_error_string ,
38 .Nm archive_format_name ,
40 .Nd libarchive utility functions
44 .Fn archive_clear_error "struct archive *"
46 .Fn archive_compression "struct archive *"
48 .Fn archive_compression_name "struct archive *"
50 .Fn archive_copy_error "struct archive *" "struct archive *"
52 .Fn archive_errno "struct archive *"
54 .Fn archive_error_string "struct archive *"
56 .Fn archive_format "struct archive *"
58 .Fn archive_format_name "struct archive *"
60 .Fn archive_set_error "struct archive *" "int error_code" "const char *fmt" "..."
62 These functions provide access to various information about the
67 .Bl -tag -compact -width indent
68 .It Fn archive_clear_error
69 Clears any error information left over from a previous call.
70 Not generally used in client code.
71 .It Fn archive_compression
72 Returns a numeric code indicating the current compression.
74 .Fn archive_read_open .
75 .It Fn archive_compression_name
76 Returns a text description of the current compression suitable for display.
77 .It Fn archive_copy_error
78 Copies error information from one archive to another.
80 Returns a numeric error code (see
82 indicating the reason for the most recent error return.
83 .It Fn archive_error_string
84 Returns a textual error message suitable for display.
85 The error message here is usually more specific than that
86 obtained from passing the result of
91 Returns a numeric code indicating the format of the current
93 This value is set by a successful call to
94 .Fn archive_read_next_header .
95 Note that it is common for this value to change from
97 For example, a tar archive might have several entries that
98 utilize GNU tar extensions and several entries that do not.
99 These entries will have different format codes.
100 .It Fn archive_format_name
101 A textual description of the format of the current entry.
102 .It Fn archive_set_error
103 Sets the numeric error code and error description that will be returned
107 .Fn archive_error_string .
108 This function should be used within I/O callbacks to set system-specific
109 error codes and error descriptions.
110 This function accepts a printf-like format string and arguments.
111 However, you should be careful to use only the following printf
128 Field-width specifiers and other printf features are
129 not uniformly supported and should not be used.
133 .Xr archive_write 3 ,
139 library first appeared in
145 library was written by
146 .An Tim Kientzle Aq kientzle@acm.org .