NAME¶
explain_getgroups_or_die - get supplementary group IDs and report errors
SYNOPSIS¶
#include <libexplain/getgroups.h>
void explain_getgroups_or_die(int data_size, gid_t *data);
int explain_getgroups_on_error(int data_size, gid_t *data);
DESCRIPTION¶
The
explain_getgroups_or_die function is used to call the
getgroups(2) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_getgroups(3) function, and
then the process terminates by calling exit(EXIT_FAILURE).
The
explain_getgroups_on_error function is used to call the
getgroups(2) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_getgroups(3) function, but
still returns to the caller.
- data_size
- The data_size, exactly as to be passed to the
getgroups(2) system call.
- data
- The data, exactly as to be passed to the
getgroups(2) system call.
RETURN VALUE¶
The
explain_getgroups_or_die function only returns on success, see
getgroups(2) for more information. On failure, prints an explanation
and exits, it does not return.
The
explain_getgroups_on_error function always returns the value return
by the wrapped
getgroups(2) system call.
EXAMPLE¶
The
explain_getgroups_or_die function is intended to be used in a fashion
similar to the following example:
explain_getgroups_or_die(data_size, data);
SEE ALSO¶
- getgroups(2)
- get/set list of supplementary group IDs
- explain_getgroups(3)
- explain getgroups(2) errors
- exit(2)
- terminate the calling process
COPYRIGHT¶
libexplain version 0.52
Copyright (C) 2009 Peter Miller