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https://github.com/topjohnwu/ndk-busybox.git
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106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* some system calls possibly missing from libc
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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/* Kernel headers before 2.1.mumble need this on the Alpha to get
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_syscall* defined. */
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#define __LIBRARY__
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#include <sys/syscall.h>
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#include "libbb.h"
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int sysfs( int option, unsigned int fs_index, char * buf)
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{
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return(syscall(__NR_sysfs, option, fs_index, buf));
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}
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int pivot_root(const char * new_root,const char * put_old)
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{
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#ifndef __NR_pivot_root
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#warning This kernel does not support the pivot_root syscall
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#warning -> The pivot_root system call is being stubbed out...
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/* BusyBox was compiled against a kernel that did not support
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* the pivot_root system call. To make this application work,
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* you will need to recompile with a kernel supporting the
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* pivot_root system call.
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*/
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bb_error_msg("\n\nTo make this application work, you will need to recompile\n"
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"BusyBox with a kernel supporting the pivot_root system call.\n");
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errno=ENOSYS;
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return -1;
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#else
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return(syscall(__NR_pivot_root, new_root, put_old));
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#endif
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}
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/* These syscalls are not included in ancient glibc versions */
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#if ((__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1))
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int bdflush(int func, int data)
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{
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return(syscall(__NR_bdflush, func, data));
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}
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#ifndef __alpha__
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# define __NR_klogctl __NR_syslog
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int klogctl(int type, char *b, int len)
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{
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return(syscall(__NR_klogctl, type, b, len));
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}
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#endif
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int umount2(const char * special_file, int flags)
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{
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#ifndef __NR_pivot_root
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#warning This kernel does not support the umount2 syscall
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#warning -> The umount2 system call is being stubbed out...
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/* BusyBox was compiled against a kernel that did not support
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* the umount2 system call. To make this application work,
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* you will need to recompile with a kernel supporting the
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* umount2 system call.
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*/
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bb_error_msg("\n\nTo make this application work, you will need to recompile\n"
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"BusyBox with a kernel supporting the umount2 system call.\n");
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errno=ENOSYS;
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return -1;
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#else
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return(syscall(__NR_umount2, special_file, flags));
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#endif
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}
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#endif
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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