Provided by: libexplain-dev_1.4.D001-2_amd64 bug

NAME

       explain_tcsendbreak - explain tcsendbreak(3) errors

SYNOPSIS

       #include <libexplain/tcsendbreak.h>
       const char *explain_tcsendbreak(int fildes, int duration);
       const char *explain_errno_tcsendbreak(int errnum, int fildes, int duration);
       void explain_message_tcsendbreak(char *message, int message_size, int fildes, int
       duration);
       void explain_message_errno_tcsendbreak(char *message, int message_size, int errnum, int
       fildes, int duration);

DESCRIPTION

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

   explain_tcsendbreak
       const char *explain_tcsendbreak(int fildes, int duration);

       The explain_tcsendbreak function is used to obtain an explanation of an error returned  by
       the  tcsendbreak(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.

       fildes  The original fildes, exactly as passed to the tcsendbreak(3) system call.

       duration
               The original duration, exactly as passed to the tcsendbreak(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:
              if (tcsendbreak(fildes, duration) < 0)
              {
                  fprintf(stderr, "%s\n", explain_tcsendbreak(fildes, duration));
                  exit(EXIT_FAILURE);
              }

       The above code example is  available  pre‐packaged  as  the  explain_tcsendbreak_or_die(3)
       function.

   explain_errno_tcsendbreak
       const char *explain_errno_tcsendbreak(int errnum, int fildes, int duration);

       The  explain_errno_tcsendbreak  function  is  used  to  obtain  an explanation of an error
       returned by the tcsendbreak(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.

       fildes  The original fildes, exactly as passed to the tcsendbreak(3) system call.

       duration
               The original duration, exactly as passed to the tcsendbreak(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:
              if (tcsendbreak(fildes, duration) < 0)
              {
                  int err = errno;
                  fprintf(stderr, "%s\n", explain_errno_tcsendbreak(err, fildes, duration));
                  exit(EXIT_FAILURE);
              }

       The above code example is  available  pre‐packaged  as  the  explain_tcsendbreak_or_die(3)
       function.

   explain_message_tcsendbreak
       void explain_message_tcsendbreak(char *message, int message_size, int fildes, int
       duration);

       The explain_message_tcsendbreak function is used to obtain  an  explanation  of  an  error
       returned  by  the  tcsendbreak(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.

       fildes  The original fildes, exactly as passed to the tcsendbreak(3) system call.

       duration
               The original duration, exactly as passed to the tcsendbreak(3) system call.

       Example: This function is intended to be used  in  a  fashion  similar  to  the  following
       example:
              if (tcsendbreak(fildes, duration) < 0)
              {
                  char message[3000];
                  explain_message_tcsendbreak(message, sizeof(message), fildes, duration);
                  fprintf(stderr, "%s\n", message);
                  exit(EXIT_FAILURE);
              }

       The  above  code  example  is  available pre‐packaged as the explain_tcsendbreak_or_die(3)
       function.

   explain_message_errno_tcsendbreak
       void explain_message_errno_tcsendbreak(char *message, int message_size, int errnum, int
       fildes, int duration);

       The  explain_message_errno_tcsendbreak  function  is  used  to obtain an explanation of an
       error returned by the tcsendbreak(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.

       fildes  The original fildes, exactly as passed to the tcsendbreak(3) system call.

       duration
               The original duration, exactly as passed to the tcsendbreak(3) system call.

       Example: This function is intended to be used  in  a  fashion  similar  to  the  following
       example:
              if (tcsendbreak(fildes, duration) < 0)
              {
                  int err = errno;
                  char message[3000];
                  explain_message_errno_tcsendbreak(message, sizeof(message), err, fildes,
                  duration);
                  fprintf(stderr, "%s\n", message);
                  exit(EXIT_FAILURE);
              }

       The above code example is  available  pre‐packaged  as  the  explain_tcsendbreak_or_die(3)
       function.

SEE ALSO

       tcsendbreak(3)
               send terminal line break

       explain_tcsendbreak_or_die(3)
               send terminal line break and report errors

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                           explain_tcsendbreak(3)