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