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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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ICONV_OPEN(3P) POSIX Programmer's Manual ICONV_OPEN(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
iconv_open — codeset conversion allocation function
#include <iconv.h>
iconv_t iconv_open(const char *tocode, const char *fromcode);
The iconv_open() function shall return a conversion descriptor
that describes a conversion from the codeset specified by the
string pointed to by the fromcode argument to the codeset
specified by the string pointed to by the tocode argument. For
state-dependent encodings, the conversion descriptor shall be in
a codeset-dependent initial shift state, ready for immediate use
with iconv().
Settings of fromcode and tocode and their permitted combinations
are implementation-defined.
A conversion descriptor shall remain valid until it is closed by
iconv_close() or an implicit close.
If a file descriptor is used to implement conversion descriptors,
the FD_CLOEXEC flag shall be set; see <fcntl.h>.
Upon successful completion, iconv_open() shall return a
conversion descriptor for use on subsequent calls to iconv().
Otherwise, iconv_open() shall return (iconv_t)-1 and set errno to
indicate the error.
The iconv_open() function may fail if:
EMFILE All file descriptors available to the process are
currently open.
ENFILE Too many files are currently open in the system.
ENOMEM Insufficient storage space is available.
EINVAL The conversion specified by fromcode and tocode is not
supported by the implementation.
The following sections are informative.
None.
Some implementations of iconv_open() use malloc() to allocate
space for internal buffer areas. The iconv_open() function may
fail if there is insufficient storage space to accommodate these
buffers.
Conforming applications must assume that conversion descriptors
are not valid after a call to one of the exec functions.
Application developers should consult the system documentation to
determine the supported codesets and their naming schemes.
None.
None.
iconv(3p), iconv_close(3p)
The Base Definitions volume of POSIX.1‐2017, fcntl.h(0p),
iconv.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any
discrepancy between this version and the original IEEE and The
Open Group Standard, the original IEEE and The Open Group
Standard is the referee document. The original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 ICONV_OPEN(3P)
Pages that refer to this page: iconv.h(0p), iconv(3p), iconv_close(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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