Provided by: libexplain-dev_1.4.D001-12_amd64 bug

NAME

       explain_iconv - explain iconv(3) errors

SYNOPSIS

       #include <libexplain/iconv.h>
       const char *explain_iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf,
       size_t *outbytesleft);
       const char *explain_errno_iconv(int errnum, iconv_t cd, char **inbuf, size_t *inbytesleft,
       char **outbuf, size_t *outbytesleft);
       void explain_message_iconv(char *message, int message_size, iconv_t cd, char **inbuf,
       size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
       void explain_message_errno_iconv(char *message, int message_size, int errnum, iconv_t cd,
       char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

DESCRIPTION

       These  functions  may  be  used to obtain explanations for errors returned by the iconv(3)
       system call.

   explain_iconv
       const char *explain_iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf,
       size_t *outbytesleft);

       The  explain_iconv  function  is used to obtain an explanation of an error returned by the
       iconv(3) system call. The least the message will contain is the value of  strerror(errno),
       but usually it will do much better, and indicate the underlying cause in more detail.

       The errno global variable will be used to obtain the error value to be decoded.

       cd      The original cd, exactly as passed to the iconv(3) system call.

       inbuf   The original inbuf, exactly as passed to the iconv(3) system call.

       inbytesleft
               The original inbytesleft, exactly as passed to the iconv(3) system call.

       outbuf  The original outbuf, exactly as passed to the iconv(3) system call.

       outbytesleft
               The original outbytesleft, exactly as passed to the iconv(3) system call.

       Returns:
               The  message explaining the error. This message buffer is shared by all libexplain
               functions which do not supply a buffer in  their  argument  list.   This  will  be
               overwritten  by the next call to any libexplain function which shares this buffer,
               including other threads.

       Note: This function is not thread safe, because it  shares  a  return  buffer  across  all
       threads, and many other functions in this library.

       Example:  This  function  is  intended  to  be  used in a fashion similar to the following
       example:
              errno = 0;
              size_t result = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
              if (result < 0 && errno != 0)
              {
                  fprintf(stderr, "%s\n", explain_iconv(cd, inbuf, inbytesleft, outbuf,
                  outbytesleft));
                  exit(EXIT_FAILURE);
              }

       The above code example is available pre-packaged as the explain_iconv_or_die(3) function.

   explain_errno_iconv
       const char *explain_errno_iconv(int errnum, iconv_t cd, char **inbuf, size_t *inbytesleft,
       char **outbuf, size_t *outbytesleft);

       The explain_errno_iconv function is used to obtain an explanation of an error returned  by
       the   iconv(3)  system  call.  The  least  the  message  will  contain  is  the  value  of
       strerror(errno), but usually it will do much better, and indicate the underlying cause  in
       more detail.

       errnum  The  error  value  to  be decoded, usually obtained from the errno global variable
               just before this function is called. This is necessary if you  need  to  call  any
               code  between the system call to be explained and this function, because many libc
               functions will alter the value of errno.

       cd      The original cd, exactly as passed to the iconv(3) system call.

       inbuf   The original inbuf, exactly as passed to the iconv(3) system call.

       inbytesleft
               The original inbytesleft, exactly as passed to the iconv(3) system call.

       outbuf  The original outbuf, exactly as passed to the iconv(3) system call.

       outbytesleft
               The original outbytesleft, exactly as passed to the iconv(3) system call.

       Returns:
               The message explaining the error. This message buffer is shared by all  libexplain
               functions  which  do  not  supply  a  buffer in their argument list.  This will be
               overwritten by the next call to any libexplain function which shares this  buffer,
               including other threads.

       Note:  This  function  is  not  thread  safe, because it shares a return buffer across all
       threads, and many other functions in this library.

       Example: This function is intended to be used  in  a  fashion  similar  to  the  following
       example:
              errno = 0;
              size_t result = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
              if (result < 0 && errno != 0)
              {
                  int err = errno;
                  fprintf(stderr, "%s\n", explain_errno_iconv(err, cd, inbuf, inbytesleft,
                  outbuf, outbytesleft));
                  exit(EXIT_FAILURE);
              }

       The above code example is available pre-packaged as the explain_iconv_or_die(3) function.

   explain_message_iconv
       void explain_message_iconv(char *message, int message_size, iconv_t cd, char **inbuf,
       size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

       The  explain_message_iconv  function is used to obtain an explanation of an error returned
       by the iconv(3) system  call.  The  least  the  message  will  contain  is  the  value  of
       strerror(errno),  but usually it will do much better, and indicate the underlying cause in
       more detail.

       The errno global variable will be used to obtain the error value to be decoded.

       message The location in which to store the returned message. If a suitable message  return
               buffer is supplied, this function is thread safe.

       message_size
               The size in bytes of the location in which to store the returned message.

       cd      The original cd, exactly as passed to the iconv(3) system call.

       inbuf   The original inbuf, exactly as passed to the iconv(3) system call.

       inbytesleft
               The original inbytesleft, exactly as passed to the iconv(3) system call.

       outbuf  The original outbuf, exactly as passed to the iconv(3) system call.

       outbytesleft
               The original outbytesleft, exactly as passed to the iconv(3) system call.

       Example:  This  function  is  intended  to  be  used in a fashion similar to the following
       example:
              errno = 0;
              size_t result = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
              if (result < 0 && errno != 0)
              {
                  char message[3000];
                  explain_message_iconv(message, sizeof(message), cd, inbuf, inbytesleft, outbuf,
                  outbytesleft);
                  fprintf(stderr, "%s\n", message);
                  exit(EXIT_FAILURE);
              }

       The above code example is available pre-packaged as the explain_iconv_or_die(3) function.

   explain_message_errno_iconv
       void explain_message_errno_iconv(char *message, int message_size, int errnum, iconv_t cd,
       char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

       The explain_message_errno_iconv function is used to obtain  an  explanation  of  an  error
       returned  by  the iconv(3) system call. The least the message will contain is the value of
       strerror(errno), but usually it will do much better, and indicate the underlying cause  in
       more detail.

       message The  location in which to store the returned message. If a suitable message return
               buffer is supplied, this function is thread safe.

       message_size
               The size in bytes of the location in which to store the returned message.

       errnum  The error value to be decoded, usually obtained from  the  errno  global  variable
               just  before  this  function  is called. This is necessary if you need to call any
               code between the system call to be explained and this function, because many  libc
               functions will alter the value of errno.

       cd      The original cd, exactly as passed to the iconv(3) system call.

       inbuf   The original inbuf, exactly as passed to the iconv(3) system call.

       inbytesleft
               The original inbytesleft, exactly as passed to the iconv(3) system call.

       outbuf  The original outbuf, exactly as passed to the iconv(3) system call.

       outbytesleft
               The original outbytesleft, exactly as passed to the iconv(3) system call.

       Example:  This  function  is  intended  to  be  used in a fashion similar to the following
       example:
              errno = 0;
              size_t result = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
              if (result < 0 && errno != 0)
              {
                  int err = errno;
                  char message[3000];
                  explain_message_errno_iconv(message, sizeof(message), err, cd, inbuf,
                  inbytesleft, outbuf, outbytesleft);
                  fprintf(stderr, "%s\n", message);
                  exit(EXIT_FAILURE);
              }

       The above code example is available pre-packaged as the explain_iconv_or_die(3) function.

SEE ALSO

       iconv(3)
               perform character set conversion

       explain_iconv_or_die(3)
               perform character set conversion and report errors

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                                 explain_iconv(3)