explain_getgroups_or_die man page

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

Referenced By

explain(3), explain_getgroups(3).