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'\" te .\" zip_file_extra_field_get.mdoc -- get extra field for file in zip .\" Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner .\" .\" This file is part of libzip, a library to manipulate ZIP files. .\" The authors can be contacted at <libzip@nih.at> .\" .\" 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. .\" 3. The names of the authors may not be used to endorse or promote .\" products derived from this software without specific prior .\" written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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. .\" .Dd December 18, 2017 .Dt ZIP_FILE_EXTRA_FIELD_GET 3 .Os .Sh NAME .Nm zip_file_extra_field_get , .Nm zip_file_extra_field_get_by_id .Nd get extra field for file in zip .Sh LIBRARY libzip (-lzip) .Sh SYNOPSIS .In zip.h .Ft const zip_uint8_t * .Fn zip_file_extra_field_get "zip_t *archive" "zip_uint64_t index" "zip_uint16_t extra_field_index" "zip_uint16_t *idp" "zip_uint16_t *lenp" "zip_flags_t flags" .Ft const zip_uint8_t * .Fn zip_file_extra_field_get_by_id "zip_t *archive" "zip_uint64_t index" "zip_uint16_t extra_field_id" "zip_uint16_t extra_field_index" "zip_uint16_t *lenp" "zip_flags_t flags" .Sh DESCRIPTION The .Fn zip_file_extra_field_get function returns the extra field with index .Ar extra_field_index for the file at position .Ar index in the zip archive. This pointer should not be modified or .Xr free 3 Ap d , and becomes invalid when .Ar archive is closed. If .Ar idp is not .Dv NULL , the integer to which it points will be set to the ID (two-byte signature) of the selected extra field. If .Ar lenp is not .Dv NULL , the integer to which it points will be set to the length of the extra field. Generally speaking, .Ar lenp and .Ar idp should be passed since only the extra field data is returned (i.e., neither the ID nor the length, if the .Ar idp and .Ar lenp arguments are not provided). .Pp The following .Ar flags are supported: .Bl -tag -width ZIP_FL_UNCHANGEDXX -offset indent .It Dv ZIP_FL_CENTRAL Return extra fields from the archive's central directory. .It Dv ZIP_FL_LOCAL Return extra fields from the local file headers. .It Dv ZIP_FL_UNCHANGED Return the original unchanged extra fields, ignoring any changes made. .El .Pp The .Fn zip_file_extra_field_get_by_id function returns the extra field with ID (two-byte signature) .Ar extra_field_id and index .Ar extra_field_index (in other words, the .Ar extra_field_index Ns No 'th extra field with ID .Ar extra_field_id ) The other arguments are the same as for .Fn zip_file_extra_field_get . .Sh RETURN VALUES Upon successful completion, a pointer to an extra field is returned, or .Dv NULL if there is no extra field with that .Ar extra_field_index for the file with index .Ar index . In case of an error, .Dv NULL is returned and the error code in .Ar archive is set to indicate the error. .Sh ERRORS .Fn zip_file_extra_field_get and .Fn zip_file_extra_field_get_by_id fail if: .Bl -tag -width Er .It Bq Er ZIP_ER_NOENT .Ar index is not a valid file index in .Ar archive , or .Ar extra_field_index is not a valid extra file index (for ID .Ar extra_field_id ) . .El .\" Oracle has added the ARC stability level to this manual page .Sh ATTRIBUTES See .Xr attributes 7 for descriptions of the following attributes: .sp .TS box; cbp-1 | cbp-1 l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE = Availability compress/libzip = Stability Volatile .TE .Pp .Sh SEE ALSO .Xr libzip 3 , .Xr zip_file_extra_field_delete 3 , .Xr zip_file_extra_field_set 3 , .Xr zip_file_extra_fields_count 3 .Sh HISTORY .Fn zip_file_extra_field_get and .Fn zip_file_extra_field_get_by_id were added in libzip 0.11. .Sh AUTHORS .An -nosplit .An Dieter Baron Aq Mt dillo@nih.at and .An Thomas Klausner Aq Mt tk@giga.or.at .Sh CAVEATS Please note that the extra field IDs 0x0001 (ZIP64 extension), 0x6375 (Infozip UTF-8 comment), and 0x7075 (Infozip UTF-8 file name) can not be read using .Fn zip_file_extra_field_get since they are used by .Xr libzip 3 internally. .Sh NOTES .\" Oracle has added source availability information to this manual page Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source-code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://libzip.org/download/libzip-1.9.2.tar.gz. Further information about this software can be found on the open source community website at https://libzip.org/.