| .\" zip_get_file_extra.mdoc -- get extra field for file in zip |
| .\" Copyright (C) 2006-2011 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 |
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| .\" 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 |
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| .Dd February 13, 2011 |
| .Dt ZIP_GET_FILE_EXTRA 3 |
| .Os |
| .Sh NAME |
| .Nm zip_get_file_extra |
| .Nd get extra field for file in zip |
| .Sh LIBRARY |
| libzip (-lzip) |
| .Sh SYNOPSIS |
| .In zip.h |
| .Ft const char * |
| .Fn zip_get_file_extra "struct zip *archive" "zip_uint64_t index" \ |
| "int *lenp" "int flags" |
| .Sh DESCRIPTION |
| The |
| .Fn zip_get_file_extra |
| function returns the extra field for the file at position |
| .Ar index |
| in the zip archive. |
| This pointer should not be modified or |
| .Xr free 3 Ap d . |
| If |
| .Ar lenp |
| is not |
| .Dv NULL , |
| the integer to which it points will be set to the length of the |
| extra. |
| If |
| .Ar flags |
| is set to |
| .Dv ZIP_FL_UNCHANGED , |
| the original unchanged extra field is returned. |
| .Sh RETURN VALUES |
| Upon successful completion, a pointer to the extra field is returned, |
| or |
| .Dv NULL |
| if there is no extra field. |
| 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_get_file_extra |
| fails if: |
| .Bl -tag -width Er |
| .It Bq Er ZIP_ER_INVAL |
| .Ar index |
| is not a valid file index in |
| .Ar archive . |
| .El |
| .Sh SEE ALSO |
| .Xr libzip 3 , |
| .Xr zip_set_file_extra 3 |
| .Sh AUTHORS |
| .An -nosplit |
| .An Dieter Baron Aq dillo@giga.or.at |
| and |
| .An Thomas Klausner Aq tk@giga.or.at |
