From 6334e558ab33ee1e54ed33740881a2798c5915c2 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Wed, 21 Jan 2004 23:27:48 +0000 Subject: Split up syscalls.c, since it had grown to be quite large and ugly. -Erik --- libc/sysdeps/linux/common/getgroups.c | 36 +++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 libc/sysdeps/linux/common/getgroups.c (limited to 'libc/sysdeps/linux/common/getgroups.c') diff --git a/libc/sysdeps/linux/common/getgroups.c b/libc/sysdeps/linux/common/getgroups.c new file mode 100644 index 000000000..21085ea78 --- /dev/null +++ b/libc/sysdeps/linux/common/getgroups.c @@ -0,0 +1,36 @@ +/* vi: set sw=4 ts=4: */ +/* + * getgroups() for uClibc + * + * Copyright (C) 2000-2004 by Erik Andersen + * + * GNU Library General Public License (LGPL) version 2 or later. + */ + +#include "syscalls.h" +#include + +#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 n, gid_t * groups) +{ + if (unlikely(n < 0)) { + __set_errno(EINVAL); + return -1; + } else { + int i, ngids; + __kernel_gid_t kernel_groups[n = MIN(n, sysconf(_SC_NGROUPS_MAX))]; + + ngids = __syscall_getgroups(n, kernel_groups); + if (n != 0 && ngids > 0) { + for (i = 0; i < ngids; i++) { + groups[i] = kernel_groups[i]; + } + } + return ngids; + } +} -- cgit v1.2.3