1 .\" Copyright (c) 2003-2007 Tim Kientzle
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25 .\" $FreeBSD: src/lib/libarchive/archive_util.3,v 1.6 2007/03/03 07:37:36 kientzle Exp $
31 .Nm archive_clear_error ,
32 .Nm archive_compression ,
33 .Nm archive_compression_name ,
35 .Nm archive_error_string ,
37 .Nm archive_format_name ,
39 .Nd libarchive utility functions
43 .Fn archive_clear_error "struct archive *"
45 .Fn archive_compression "struct archive *"
47 .Fn archive_compression_name "struct archive *"
49 .Fn archive_errno "struct archive *"
51 .Fn archive_error_string "struct archive *"
53 .Fn archive_format "struct archive *"
55 .Fn archive_format_name "struct archive *"
57 .Fn archive_set_error "struct archive *" "int error_code" "const char *fmt" "..."
59 These functions provide access to various information about the
64 .Bl -tag -compact -width indent
65 .It Fn archive_clear_error
66 Clears any error information left over from a previous call.
67 Not generally used in client code.
68 .It Fn archive_compression
69 Returns a numeric code indicating the current compression.
71 .Fn archive_read_open .
72 .It Fn archive_compression_name
73 Returns a text description of the current compression suitable for display.
75 Returns a numeric error code (see
77 indicating the reason for the most recent error return.
78 .It Fn archive_error_string
79 Returns a textual error message suitable for display.
80 The error message here is usually more specific than that
81 obtained from passing the result of
86 Returns a numeric code indicating the format of the current
88 This value is set by a successful call to
89 .Fn archive_read_next_header .
90 Note that it is common for this value to change from
92 For example, a tar archive might have several entries that
93 utilize GNU tar extensions and several entries that do not.
94 These entries will have different format codes.
95 .It Fn archive_format_name
96 A textual description of the format of the current entry.
97 .It Fn archive_set_error
98 Sets the numeric error code and error description that will be returned
102 .Fn archive_error_string .
103 This function should be used within I/O callbacks to set system-specific
104 error codes and error descriptions.
105 This function accepts a printf-like format string and arguments.
106 However, you should be careful to use only the following printf
123 Field-width specifiers and other printf features are
124 not uniformly supported and should not be used.
128 .Xr archive_write 3 ,
134 library first appeared in
140 library was written by
141 .An Tim Kientzle Aq kientzle@acm.org .