NAME

explain_getgrouplist_or_die - get list of groups and report errors

SYNOPSIS

#include <libexplain/getgrouplist.h>

void explain_getgrouplist_or_die(const char *user, gid_t group, gid_t *groups, int *ngroups);
int explain_getgrouplist_on_error(const char *user, gid_t group, gid_t *groups, int *ngroups);

DESCRIPTION

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

The explain_getgrouplist_on_error function is used to call the getgrouplist(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_getgrouplist(3) function, but still returns to the caller.

user: The user, exactly as to be passed to the getgrouplist(3) system call.
group: The group, exactly as to be passed to the getgrouplist(3) system call.
groups: The groups, exactly as to be passed to the getgrouplist(3) system call.
ngroups: The ngroups, exactly as to be passed to the getgrouplist(3) system call.

RETURN VALUE

The explain_getgrouplist_or_die function only returns on success, see getgrouplist(3) for more information. On failure, prints an explanation and exits, it does not return.

The explain_getgrouplist_on_error function always returns the value return by the wrapped getgrouplist(3) system call.

EXAMPLE

The explain_getgrouplist_or_die function is intended to be used in a fashion similar to the following example:

explain_getgrouplist_or_die(user, group, groups, ngroups);

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

EXAMPLE

SEE ALSO

COPYRIGHT