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iconv_open(3p) — Linux manual page

ICONV_OPEN(3P)          POSIX Programmer's ManualICONV_OPEN(3P)

PROLOG        top

       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.

NAME        top

       iconv_open — codeset conversion allocation function

SYNOPSIS        top

       #include <iconv.h>       iconv_t iconv_open(const char *tocode, const char *fromcode);

DESCRIPTION        top

       Theiconv_open() function shall return a conversion descriptor       that describes a conversion from the codeset specified by the       string pointed to by thefromcode argument to the codeset       specified by the string pointed to by thetocode argument. For       state-dependent encodings, the conversion descriptor shall be in a       codeset-dependent initial shift state, ready for immediate use       withiconv().       Settings offromcode andtocode and their permitted combinations       are implementation-defined.       A conversion descriptor shall remain valid until it is closed byiconv_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>.

RETURN VALUE        top

       Upon successful completion,iconv_open() shall return a conversion       descriptor for use on subsequent calls toiconv().  Otherwise,iconv_open() shall return (iconv_t)-1 and seterrno to indicate       the error.

ERRORS        top

       Theiconv_open() function may fail if:EMFILEAll file descriptors available to the process are currently              open.ENFILEToo many files are currently open in the system.ENOMEMInsufficient storage space is available.EINVALThe conversion specified byfromcode andtocode is not              supported by the implementation.The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       Some implementations oficonv_open() usemalloc() to allocate       space for internal buffer areas. Theiconv_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 theexec functions.       Application developers should consult the system documentation to       determine the supported codesets and their naming schemes.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

iconv(3p),iconv_close(3p)       The Base Definitions volume of POSIX.1‐2017,fcntl.h(0p),iconv.h(0p)

COPYRIGHT        top

       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 athttp://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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017ICONV_OPEN(3P)

Pages that refer to this page:iconv.h(0p), iconv(3p), iconv_close(3p)

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