38 lines
860 B
C
38 lines
860 B
C
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/**
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* @brief List group memberships.
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* @file apps/groups.c
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*
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* @copyright
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2021 K. Lange
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <pwd.h>
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int main(int argc, char ** argv) {
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/* First print our egid group */
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struct passwd * p = getpwuid(getegid());
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if (p) {
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fprintf(stdout, "%s ", p->pw_name);
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}
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/* Then get the group list. */
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int groupCount = getgroups(0, NULL);
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if (groupCount) {
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gid_t * myGroups = malloc(sizeof(gid_t) * groupCount);
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groupCount = getgroups(groupCount, myGroups);
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for (int i = 0; i < groupCount; ++i) {
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p = getpwuid(myGroups[i]);
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if (p) {
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fprintf(stdout, "%s ", p->pw_name);
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}
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}
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}
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fprintf(stdout,"\n");
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endpwent();
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return 0;
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}
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