explain_getgrouplist_or_die3
Get list of groups and report errors
Usage
#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);
Overview
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.
Examples
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);Releases
Unchanged in 5 releases since Debian 9 (Stretch).