explain_gethostname_or_die(3) [debian man page]

explain_gethostname_or_die(3)				     Library Functions Manual				     explain_gethostname_or_die(3)

NAME

       explain_gethostname_or_die - get/set hostname and report errors

SYNOPSIS

       #include <libexplain/gethostname.h>
       void explain_gethostname_or_die(char *data, size_t data_size);
       intexplain_gethostname_on_error(char *data, size_t data_size);

DESCRIPTION

       The  explain_gethostname_or_die	function  is  used  to	call  the gethostname(2) system call. On failure an explanation will be printed to
       stderr, obtained from the explain_gethostname(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

       The explain_gethostname_on_error function is used to call the gethostname(2) system call. On failure an	explanation  will  be  printed	to
       stderr, obtained from the explain_gethostname(3) function, but still returns to the caller.

       data    The data, exactly as to be passed to the gethostname(2) system call.

       data_size
	       The data_size, exactly as to be passed to the gethostname(2) system call.

RETURN VALUE

       The explain_gethostname_or_die function only returns on success, see gethostname(2) for more information. On failure, prints an explanation
       and exits, it does not return.

       The explain_gethostname_on_error function always returns the value return by the wrapped gethostname(2) system call.

EXAMPLE

       The explain_gethostname_or_die function is intended to be used in a fashion similar to the following example:
	      explain_gethostname_or_die(data, data_size);

SEE ALSO

       gethostname(2)
	       get/set hostname

       explain_gethostname(3)
	       explain gethostname(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2009 Peter Miller

														     explain_gethostname_or_die(3)

explain_pread_or_die(3) 				     Library Functions Manual					   explain_pread_or_die(3)

NAME

       explain_pread_or_die - seek and read from a file descriptor and report errors

SYNOPSIS

       #include <libexplain/pread.h>
       ssize_t explain_pread_or_die(int fildes, void *data, size_t data_size, off_t offset);
       ssize_t explain_pread_on_error(int fildes, void *data, size_t data_size, off_t offset))

DESCRIPTION

       The  explain_pread_or_die  function is used to call the pread(2) system call. On failure an explanation will be printed to stderr, obtained
       from the explain_pread(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

       The explain_pread_on_error function is used to call the pread(2) system call. On failure an explanation will be printed to stderr, obtained
       from the explain_pread(3) function, but still returns to the caller.

       fildes  The fildes, exactly as to be passed to the pread(2) system call.

       data    The data, exactly as to be passed to the pread(2) system call.

       data_size
	       The data_size, exactly as to be passed to the pread(2) system call.

       offset  The offset, exactly as to be passed to the pread(2) system call.

RETURN VALUE

       The  explain_pread_or_die function only returns on success, see pread(2) for more information. On failure, prints an explanation and exits,
       it does not return.

       The explain_pread_on_error function always returns the value return by the wrapped pread(2) system call.

EXAMPLE

       The explain_pread_or_die function is intended to be used in a fashion similar to the following example:
	      ssize_t result = explain_pread_or_die(fildes, data, data_size, offset);

SEE ALSO

       pread(2)
	       read from a file descriptor at a given offset

       explain_pread(3)
	       explain pread(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2009 Peter Miller

															   explain_pread_or_die(3)