/* vi: set sw=4 ts=4: */ /* * getgroups() for uClibc * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <sys/syscall.h> #include <stdlib.h> #include <unistd.h> #include <grp.h> #if defined(__NR_getgroups32) # undef __NR_getgroups # define __NR_getgroups __NR_getgroups32 _syscall2(int, getgroups, int, size, gid_t *, list) #elif __WORDSIZE == 64 _syscall2(int, getgroups, int, size, gid_t *, list) #else #define MIN(a,b) (((a)<(b))?(a):(b)) #define __NR___syscall_getgroups __NR_getgroups static __inline__ _syscall2(int, __syscall_getgroups, int, size, __kernel_gid_t *, list) int getgroups(int size, gid_t groups[]) { if (unlikely(size < 0)) { ret_error: __set_errno(EINVAL); return -1; } else { int i, ngids; __kernel_gid_t *kernel_groups; size = MIN(size, sysconf(_SC_NGROUPS_MAX)); kernel_groups = (__kernel_gid_t *)malloc(sizeof(*kernel_groups) * size); if (size && kernel_groups == NULL) goto ret_error; ngids = __syscall_getgroups(size, kernel_groups); if (size != 0 && ngids > 0) { for (i = 0; i < ngids; i++) { groups[i] = kernel_groups[i]; } } free(kernel_groups); return ngids; } } #endif libc_hidden_def(getgroups)