1 .\" Copyright (c) 2003-2007 Tim Kientzle
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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 *"
61 .Fa "struct archive *"
67 These functions provide access to various information about the
72 .Bl -tag -compact -width indent
73 .It Fn archive_clear_error
74 Clears any error information left over from a previous call.
75 Not generally used in client code.
76 .It Fn archive_compression
77 Returns a numeric code indicating the current compression.
79 .Fn archive_read_open .
80 .It Fn archive_compression_name
81 Returns a text description of the current compression suitable for display.
82 .It Fn archive_copy_error
83 Copies error information from one archive to another.
85 Returns a numeric error code (see
87 indicating the reason for the most recent error return.
88 .It Fn archive_error_string
89 Returns a textual error message suitable for display.
90 The error message here is usually more specific than that
91 obtained from passing the result of
96 Returns a numeric code indicating the format of the current
98 This value is set by a successful call to
99 .Fn archive_read_next_header .
100 Note that it is common for this value to change from
102 For example, a tar archive might have several entries that
103 utilize GNU tar extensions and several entries that do not.
104 These entries will have different format codes.
105 .It Fn archive_format_name
106 A textual description of the format of the current entry.
107 .It Fn archive_set_error
108 Sets the numeric error code and error description that will be returned
112 .Fn archive_error_string .
113 This function should be used within I/O callbacks to set system-specific
114 error codes and error descriptions.
115 This function accepts a printf-like format string and arguments.
116 However, you should be careful to use only the following printf
133 Field-width specifiers and other printf features are
134 not uniformly supported and should not be used.
138 .Xr archive_write 3 ,
144 library first appeared in
150 library was written by
151 .An Tim Kientzle Aq kientzle@acm.org .