explain_eventfd_or_die(3) Library Functions Manual explain_eventfd_or_die(3)NAME
explain_eventfd_or_die - create event notify file descriptor and report errors
SYNOPSIS
#include <libexplain/eventfd.h>
int explain_eventfd_or_die(unsigned int initval, int flags);
int explain_eventfd_on_error(unsigned int initval, int flags);
DESCRIPTION
The explain_eventfd_or_die function is used to call the eventfd(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_eventfd(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_eventfd_on_error function is used to call the eventfd(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_eventfd(3) function, but still returns to the caller.
initval The initval, exactly as to be passed to the eventfd(2) system call.
flags The flags, exactly as to be passed to the eventfd(2) system call.
RETURN VALUE
The explain_eventfd_or_die function only returns on success, see eventfd(2) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_eventfd_on_error function always returns the value return by the wrapped eventfd(2) system call.
EXAMPLE
The explain_eventfd_or_die function is intended to be used in a fashion similar to the following example:
int result = explain_eventfd_or_die(initval, flags);
SEE ALSO eventfd(2)
create a file descriptor for event notification
explain_eventfd(3)
explain eventfd(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_eventfd_or_die(3)
Check Out this Related Man Page
explain_mmap_or_die(3) Library Functions Manual explain_mmap_or_die(3)NAME
explain_mmap_or_die - map file or device into memory and report errors
SYNOPSIS
#include <libexplain/mmap.h>
void *explain_mmap_or_die(void *data, size_t data_size, int prot, int flags, int fildes, off_t offset);
void *explain_mmap_on_error(void *data, size_t data_size, int prot, int flags, int fildes, off_t offset);
DESCRIPTION
The explain_mmap_or_die function is used to call the mmap(2) system call. On failure an explanation will be printed to stderr, obtained
from the explain_mmap(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_mmap_on_error function is used to call the mmap(2) system call. On failure an explanation will be printed to stderr, obtained
from the explain_mmap(3) function, but still returns to the caller.
data The data, exactly as to be passed to the mmap(2) system call.
data_size
The data_size, exactly as to be passed to the mmap(2) system call.
prot The prot, exactly as to be passed to the mmap(2) system call.
flags The flags, exactly as to be passed to the mmap(2) system call.
fildes The fildes, exactly as to be passed to the mmap(2) system call.
offset The offset, exactly as to be passed to the mmap(2) system call.
RETURN VALUE
The explain_mmap_or_die function only returns on success, see mmap(2) for more information. On failure, prints an explanation and exits, it
does not return.
The explain_mmap_on_error function always returns the value return by the wrapped mmap(2) system call.
EXAMPLE
The explain_mmap_or_die function is intended to be used in a fashion similar to the following example:
explain_mmap_or_die(data, data_size, prot, flags, fildes, offset);
SEE ALSO mmap(2) map file or device into memory
explain_mmap(3)
explain mmap(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2010 Peter Miller
explain_mmap_or_die(3)