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explain_setgroups_or_die(3) FreeBSD Library Functions Manual explain_setgroups_or_die(3)

explain_setgroups_or_die - set supplementary group IDs and report errors

#include <libexplain/setgroups.h>
void explain_setgroups_or_die(size_t data_size, const gid_t *data);
 
int explain_setgroups_on_error(size_t data_size, const gid_t *data);

The explain_setgroups_or_die function is used to call the setgroups(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setgroups(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_setgroups_on_error function is used to call the setgroups(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setgroups(3) function, but still returns to the caller.
data_size
The data_size, exactly as to be passed to the setgroups(2) system call.
data
The data, exactly as to be passed to the setgroups(2) system call.

The explain_setgroups_or_die function only returns on success, see setgroups(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_setgroups_on_error function always returns the value return by the wrapped setgroups(2) system call.

The explain_setgroups_or_die function is intended to be used in a fashion similar to the following example:
explain_setgroups_or_die(data_size, data);

setgroups(2)
get/set list of supplementary group IDs
explain_setgroups(3)
explain setgroups(2) errors
exit(2)
terminate the calling process

libexplain version 1.3
 
Copyright (C) 2009 Peter Miller

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