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/*
* Copyright (C) 1996-2025 The Squid Software Foundation and contributors
*
* Squid software is distributed under GPLv2+ license and includes
* contributions from numerous individuals and organizations.
* Please see the COPYING and CONTRIBUTORS files for details.
*/
#include "squid.h"
#include "compat/initgroups.h"
#if HAVE_GRP_H
#include <grp.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
int initgroups(const char *name, gid_t basegid)
{
#if HAVE_SETGROUPS
#ifndef NGROUPS_MAX
#define NGROUPS_MAX 16
#endif
gid_t groups[NGROUPS_MAX];
struct group *g;
int index = 0;
setgrent();
groups[index++] = basegid;
while (index < NGROUPS_MAX && ((g = getgrent()) != NULL)) {
if (g->gr_gid != basegid) {
char **names;
for (names = g->gr_mem; *names != NULL; ++names) {
if (!strcmp(*names, name))
groups[index++] = g->gr_gid;
}
}
}
endgrent();
return setgroups(index, groups);
#else
return 0;
#endif /* def HAVE_SETGROUPS */
}
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