1274 lines
23 KiB
C
1274 lines
23 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* Syscall definitions for NOLIBC (those in man(2))
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* Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
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*/
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#ifndef _NOLIBC_SYS_H
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#define _NOLIBC_SYS_H
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#include <stdarg.h>
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#include "std.h"
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/* system includes */
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#include <asm/fcntl.h> // for O_*
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#include <asm/unistd.h>
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#include <asm/signal.h> // for SIGCHLD
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#include <asm/ioctls.h>
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#include <asm/mman.h>
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#include <linux/fs.h>
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#include <linux/loop.h>
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#include <linux/time.h>
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#include <linux/auxvec.h>
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#include "arch.h"
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#include "errno.h"
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#include "types.h"
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/* Functions in this file only describe syscalls. They're declared static so
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* that the compiler usually decides to inline them while still being allowed
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* to pass a pointer to one of their instances. Each syscall exists in two
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* versions:
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* - the "internal" ones, which matches the raw syscall interface at the
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* kernel level, which may sometimes slightly differ from the documented
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* libc-level ones. For example most of them return either a valid value
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* or -errno. All of these are prefixed with "sys_". They may be called
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* by non-portable applications if desired.
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*
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* - the "exported" ones, whose interface must closely match the one
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* documented in man(2), that applications are supposed to expect. These
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* ones rely on the internal ones, and set errno.
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*
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* Each syscall will be defined with the two functions, sorted in alphabetical
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* order applied to the exported names.
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*
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* In case of doubt about the relevance of a function here, only those which
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* set errno should be defined here. Wrappers like those appearing in man(3)
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* should not be placed here.
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*/
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/*
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* int brk(void *addr);
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* void *sbrk(intptr_t inc)
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*/
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static __attribute__((unused))
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void *sys_brk(void *addr)
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{
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return (void *)my_syscall1(__NR_brk, addr);
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}
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static __attribute__((unused))
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int brk(void *addr)
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{
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void *ret = sys_brk(addr);
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if (!ret) {
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SET_ERRNO(ENOMEM);
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return -1;
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}
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return 0;
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}
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static __attribute__((unused))
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void *sbrk(intptr_t inc)
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{
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void *ret;
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/* first call to find current end */
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if ((ret = sys_brk(0)) && (sys_brk(ret + inc) == ret + inc))
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return ret + inc;
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SET_ERRNO(ENOMEM);
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return (void *)-1;
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}
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/*
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* int chdir(const char *path);
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*/
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static __attribute__((unused))
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int sys_chdir(const char *path)
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{
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return my_syscall1(__NR_chdir, path);
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}
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static __attribute__((unused))
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int chdir(const char *path)
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{
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int ret = sys_chdir(path);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int chmod(const char *path, mode_t mode);
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*/
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static __attribute__((unused))
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int sys_chmod(const char *path, mode_t mode)
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{
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#ifdef __NR_fchmodat
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return my_syscall4(__NR_fchmodat, AT_FDCWD, path, mode, 0);
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#elif defined(__NR_chmod)
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return my_syscall2(__NR_chmod, path, mode);
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#else
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#error Neither __NR_fchmodat nor __NR_chmod defined, cannot implement sys_chmod()
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#endif
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}
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static __attribute__((unused))
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int chmod(const char *path, mode_t mode)
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{
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int ret = sys_chmod(path, mode);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int chown(const char *path, uid_t owner, gid_t group);
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*/
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static __attribute__((unused))
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int sys_chown(const char *path, uid_t owner, gid_t group)
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{
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#ifdef __NR_fchownat
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return my_syscall5(__NR_fchownat, AT_FDCWD, path, owner, group, 0);
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#elif defined(__NR_chown)
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return my_syscall3(__NR_chown, path, owner, group);
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#else
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#error Neither __NR_fchownat nor __NR_chown defined, cannot implement sys_chown()
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#endif
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}
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static __attribute__((unused))
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int chown(const char *path, uid_t owner, gid_t group)
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{
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int ret = sys_chown(path, owner, group);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int chroot(const char *path);
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*/
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static __attribute__((unused))
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int sys_chroot(const char *path)
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{
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return my_syscall1(__NR_chroot, path);
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}
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static __attribute__((unused))
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int chroot(const char *path)
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{
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int ret = sys_chroot(path);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int close(int fd);
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*/
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static __attribute__((unused))
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int sys_close(int fd)
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{
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return my_syscall1(__NR_close, fd);
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}
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static __attribute__((unused))
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int close(int fd)
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{
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int ret = sys_close(fd);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int dup(int fd);
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*/
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static __attribute__((unused))
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int sys_dup(int fd)
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{
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return my_syscall1(__NR_dup, fd);
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}
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static __attribute__((unused))
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int dup(int fd)
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{
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int ret = sys_dup(fd);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int dup2(int old, int new);
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*/
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static __attribute__((unused))
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int sys_dup2(int old, int new)
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{
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#ifdef __NR_dup3
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return my_syscall3(__NR_dup3, old, new, 0);
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#elif defined(__NR_dup2)
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return my_syscall2(__NR_dup2, old, new);
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#else
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#error Neither __NR_dup3 nor __NR_dup2 defined, cannot implement sys_dup2()
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#endif
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}
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static __attribute__((unused))
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int dup2(int old, int new)
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{
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int ret = sys_dup2(old, new);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int dup3(int old, int new, int flags);
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*/
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#ifdef __NR_dup3
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static __attribute__((unused))
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int sys_dup3(int old, int new, int flags)
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{
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return my_syscall3(__NR_dup3, old, new, flags);
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}
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static __attribute__((unused))
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int dup3(int old, int new, int flags)
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{
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int ret = sys_dup3(old, new, flags);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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#endif
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/*
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* int execve(const char *filename, char *const argv[], char *const envp[]);
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*/
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static __attribute__((unused))
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int sys_execve(const char *filename, char *const argv[], char *const envp[])
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{
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return my_syscall3(__NR_execve, filename, argv, envp);
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}
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static __attribute__((unused))
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int execve(const char *filename, char *const argv[], char *const envp[])
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{
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int ret = sys_execve(filename, argv, envp);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* void exit(int status);
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*/
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static __attribute__((noreturn,unused))
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void sys_exit(int status)
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{
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my_syscall1(__NR_exit, status & 255);
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while(1); // shut the "noreturn" warnings.
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}
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static __attribute__((noreturn,unused))
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void exit(int status)
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{
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sys_exit(status);
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}
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/*
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* pid_t fork(void);
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*/
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static __attribute__((unused))
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pid_t sys_fork(void)
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{
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#ifdef __NR_clone
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/* note: some archs only have clone() and not fork(). Different archs
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* have a different API, but most archs have the flags on first arg and
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* will not use the rest with no other flag.
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*/
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return my_syscall5(__NR_clone, SIGCHLD, 0, 0, 0, 0);
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#elif defined(__NR_fork)
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return my_syscall0(__NR_fork);
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#else
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#error Neither __NR_clone nor __NR_fork defined, cannot implement sys_fork()
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#endif
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}
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static __attribute__((unused))
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pid_t fork(void)
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{
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pid_t ret = sys_fork();
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int fsync(int fd);
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*/
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static __attribute__((unused))
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int sys_fsync(int fd)
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{
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return my_syscall1(__NR_fsync, fd);
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}
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static __attribute__((unused))
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int fsync(int fd)
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{
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int ret = sys_fsync(fd);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int getdents64(int fd, struct linux_dirent64 *dirp, int count);
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*/
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static __attribute__((unused))
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int sys_getdents64(int fd, struct linux_dirent64 *dirp, int count)
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{
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return my_syscall3(__NR_getdents64, fd, dirp, count);
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}
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static __attribute__((unused))
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int getdents64(int fd, struct linux_dirent64 *dirp, int count)
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{
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int ret = sys_getdents64(fd, dirp, count);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* pid_t getpgid(pid_t pid);
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*/
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static __attribute__((unused))
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pid_t sys_getpgid(pid_t pid)
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{
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return my_syscall1(__NR_getpgid, pid);
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}
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static __attribute__((unused))
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pid_t getpgid(pid_t pid)
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{
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pid_t ret = sys_getpgid(pid);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* pid_t getpgrp(void);
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*/
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static __attribute__((unused))
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pid_t sys_getpgrp(void)
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{
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return sys_getpgid(0);
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}
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static __attribute__((unused))
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pid_t getpgrp(void)
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{
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return sys_getpgrp();
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}
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/*
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* pid_t getpid(void);
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*/
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static __attribute__((unused))
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pid_t sys_getpid(void)
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{
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return my_syscall0(__NR_getpid);
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}
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static __attribute__((unused))
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pid_t getpid(void)
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{
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return sys_getpid();
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}
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/*
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* pid_t getppid(void);
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*/
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static __attribute__((unused))
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pid_t sys_getppid(void)
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{
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return my_syscall0(__NR_getppid);
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}
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static __attribute__((unused))
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pid_t getppid(void)
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{
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return sys_getppid();
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}
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/*
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* pid_t gettid(void);
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*/
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static __attribute__((unused))
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pid_t sys_gettid(void)
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{
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return my_syscall0(__NR_gettid);
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}
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static __attribute__((unused))
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pid_t gettid(void)
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{
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return sys_gettid();
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}
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static unsigned long getauxval(unsigned long key);
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/*
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* long getpagesize(void);
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*/
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static __attribute__((unused))
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long getpagesize(void)
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{
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long ret;
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ret = getauxval(AT_PAGESZ);
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if (!ret) {
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SET_ERRNO(ENOENT);
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return -1;
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}
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return ret;
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}
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/*
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* int gettimeofday(struct timeval *tv, struct timezone *tz);
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*/
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static __attribute__((unused))
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int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
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{
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return my_syscall2(__NR_gettimeofday, tv, tz);
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}
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static __attribute__((unused))
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int gettimeofday(struct timeval *tv, struct timezone *tz)
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{
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int ret = sys_gettimeofday(tv, tz);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int ioctl(int fd, unsigned long req, void *value);
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*/
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static __attribute__((unused))
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int sys_ioctl(int fd, unsigned long req, void *value)
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{
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return my_syscall3(__NR_ioctl, fd, req, value);
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}
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static __attribute__((unused))
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int ioctl(int fd, unsigned long req, void *value)
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{
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int ret = sys_ioctl(fd, req, value);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int kill(pid_t pid, int signal);
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*/
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static __attribute__((unused))
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int sys_kill(pid_t pid, int signal)
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{
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return my_syscall2(__NR_kill, pid, signal);
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}
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static __attribute__((unused))
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int kill(pid_t pid, int signal)
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{
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int ret = sys_kill(pid, signal);
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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/*
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* int link(const char *old, const char *new);
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*/
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static __attribute__((unused))
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int sys_link(const char *old, const char *new)
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{
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#ifdef __NR_linkat
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return my_syscall5(__NR_linkat, AT_FDCWD, old, AT_FDCWD, new, 0);
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#elif defined(__NR_link)
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return my_syscall2(__NR_link, old, new);
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#else
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#error Neither __NR_linkat nor __NR_link defined, cannot implement sys_link()
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#endif
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}
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|
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static __attribute__((unused))
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int link(const char *old, const char *new)
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{
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int ret = sys_link(old, new);
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|
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if (ret < 0) {
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SET_ERRNO(-ret);
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ret = -1;
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}
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return ret;
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}
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|
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/*
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|
* off_t lseek(int fd, off_t offset, int whence);
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|
*/
|
|
|
|
static __attribute__((unused))
|
|
off_t sys_lseek(int fd, off_t offset, int whence)
|
|
{
|
|
return my_syscall3(__NR_lseek, fd, offset, whence);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
off_t lseek(int fd, off_t offset, int whence)
|
|
{
|
|
off_t ret = sys_lseek(fd, offset, whence);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int mkdir(const char *path, mode_t mode);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_mkdir(const char *path, mode_t mode)
|
|
{
|
|
#ifdef __NR_mkdirat
|
|
return my_syscall3(__NR_mkdirat, AT_FDCWD, path, mode);
|
|
#elif defined(__NR_mkdir)
|
|
return my_syscall2(__NR_mkdir, path, mode);
|
|
#else
|
|
#error Neither __NR_mkdirat nor __NR_mkdir defined, cannot implement sys_mkdir()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int mkdir(const char *path, mode_t mode)
|
|
{
|
|
int ret = sys_mkdir(path, mode);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int mknod(const char *path, mode_t mode, dev_t dev);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
long sys_mknod(const char *path, mode_t mode, dev_t dev)
|
|
{
|
|
#ifdef __NR_mknodat
|
|
return my_syscall4(__NR_mknodat, AT_FDCWD, path, mode, dev);
|
|
#elif defined(__NR_mknod)
|
|
return my_syscall3(__NR_mknod, path, mode, dev);
|
|
#else
|
|
#error Neither __NR_mknodat nor __NR_mknod defined, cannot implement sys_mknod()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int mknod(const char *path, mode_t mode, dev_t dev)
|
|
{
|
|
int ret = sys_mknod(path, mode, dev);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#ifndef MAP_SHARED
|
|
#define MAP_SHARED 0x01 /* Share changes */
|
|
#define MAP_PRIVATE 0x02 /* Changes are private */
|
|
#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */
|
|
#endif
|
|
|
|
#ifndef MAP_FAILED
|
|
#define MAP_FAILED ((void *)-1)
|
|
#endif
|
|
|
|
#ifndef sys_mmap
|
|
static __attribute__((unused))
|
|
void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
|
|
off_t offset)
|
|
{
|
|
#ifndef my_syscall6
|
|
/* Function not implemented. */
|
|
return (void *)-ENOSYS;
|
|
#else
|
|
|
|
int n;
|
|
|
|
#if defined(__NR_mmap2)
|
|
n = __NR_mmap2;
|
|
offset >>= 12;
|
|
#else
|
|
n = __NR_mmap;
|
|
#endif
|
|
|
|
return (void *)my_syscall6(n, addr, length, prot, flags, fd, offset);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
static __attribute__((unused))
|
|
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
|
|
{
|
|
void *ret = sys_mmap(addr, length, prot, flags, fd, offset);
|
|
|
|
if ((unsigned long)ret >= -4095UL) {
|
|
SET_ERRNO(-(long)ret);
|
|
ret = MAP_FAILED;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int sys_munmap(void *addr, size_t length)
|
|
{
|
|
return my_syscall2(__NR_munmap, addr, length);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int munmap(void *addr, size_t length)
|
|
{
|
|
int ret = sys_munmap(addr, length);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* int mount(const char *source, const char *target,
|
|
* const char *fstype, unsigned long flags,
|
|
* const void *data);
|
|
*/
|
|
static __attribute__((unused))
|
|
int sys_mount(const char *src, const char *tgt, const char *fst,
|
|
unsigned long flags, const void *data)
|
|
{
|
|
return my_syscall5(__NR_mount, src, tgt, fst, flags, data);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int mount(const char *src, const char *tgt,
|
|
const char *fst, unsigned long flags,
|
|
const void *data)
|
|
{
|
|
int ret = sys_mount(src, tgt, fst, flags, data);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int open(const char *path, int flags[, mode_t mode]);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_open(const char *path, int flags, mode_t mode)
|
|
{
|
|
#ifdef __NR_openat
|
|
return my_syscall4(__NR_openat, AT_FDCWD, path, flags, mode);
|
|
#elif defined(__NR_open)
|
|
return my_syscall3(__NR_open, path, flags, mode);
|
|
#else
|
|
#error Neither __NR_openat nor __NR_open defined, cannot implement sys_open()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int open(const char *path, int flags, ...)
|
|
{
|
|
mode_t mode = 0;
|
|
int ret;
|
|
|
|
if (flags & O_CREAT) {
|
|
va_list args;
|
|
|
|
va_start(args, flags);
|
|
mode = va_arg(args, mode_t);
|
|
va_end(args);
|
|
}
|
|
|
|
ret = sys_open(path, flags, mode);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int pivot_root(const char *new, const char *old);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_pivot_root(const char *new, const char *old)
|
|
{
|
|
return my_syscall2(__NR_pivot_root, new, old);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int pivot_root(const char *new, const char *old)
|
|
{
|
|
int ret = sys_pivot_root(new, old);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int poll(struct pollfd *fds, int nfds, int timeout);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_poll(struct pollfd *fds, int nfds, int timeout)
|
|
{
|
|
#if defined(__NR_ppoll)
|
|
struct timespec t;
|
|
|
|
if (timeout >= 0) {
|
|
t.tv_sec = timeout / 1000;
|
|
t.tv_nsec = (timeout % 1000) * 1000000;
|
|
}
|
|
return my_syscall4(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL);
|
|
#elif defined(__NR_poll)
|
|
return my_syscall3(__NR_poll, fds, nfds, timeout);
|
|
#else
|
|
#error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int poll(struct pollfd *fds, int nfds, int timeout)
|
|
{
|
|
int ret = sys_poll(fds, nfds, timeout);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* ssize_t read(int fd, void *buf, size_t count);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
ssize_t sys_read(int fd, void *buf, size_t count)
|
|
{
|
|
return my_syscall3(__NR_read, fd, buf, count);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
ssize_t read(int fd, void *buf, size_t count)
|
|
{
|
|
ssize_t ret = sys_read(fd, buf, count);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int reboot(int cmd);
|
|
* <cmd> is among LINUX_REBOOT_CMD_*
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
ssize_t sys_reboot(int magic1, int magic2, int cmd, void *arg)
|
|
{
|
|
return my_syscall4(__NR_reboot, magic1, magic2, cmd, arg);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int reboot(int cmd)
|
|
{
|
|
int ret = sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, 0);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int sched_yield(void);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_sched_yield(void)
|
|
{
|
|
return my_syscall0(__NR_sched_yield);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int sched_yield(void)
|
|
{
|
|
int ret = sys_sched_yield();
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int select(int nfds, fd_set *read_fds, fd_set *write_fds,
|
|
* fd_set *except_fds, struct timeval *timeout);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
|
|
{
|
|
#if defined(__ARCH_WANT_SYS_OLD_SELECT) && !defined(__NR__newselect)
|
|
struct sel_arg_struct {
|
|
unsigned long n;
|
|
fd_set *r, *w, *e;
|
|
struct timeval *t;
|
|
} arg = { .n = nfds, .r = rfds, .w = wfds, .e = efds, .t = timeout };
|
|
return my_syscall1(__NR_select, &arg);
|
|
#elif defined(__ARCH_WANT_SYS_PSELECT6) && defined(__NR_pselect6)
|
|
struct timespec t;
|
|
|
|
if (timeout) {
|
|
t.tv_sec = timeout->tv_sec;
|
|
t.tv_nsec = timeout->tv_usec * 1000;
|
|
}
|
|
return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
|
|
#elif defined(__NR__newselect) || defined(__NR_select)
|
|
#ifndef __NR__newselect
|
|
#define __NR__newselect __NR_select
|
|
#endif
|
|
return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
|
|
#else
|
|
#error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
|
|
{
|
|
int ret = sys_select(nfds, rfds, wfds, efds, timeout);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int setpgid(pid_t pid, pid_t pgid);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_setpgid(pid_t pid, pid_t pgid)
|
|
{
|
|
return my_syscall2(__NR_setpgid, pid, pgid);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int setpgid(pid_t pid, pid_t pgid)
|
|
{
|
|
int ret = sys_setpgid(pid, pgid);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* pid_t setsid(void);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
pid_t sys_setsid(void)
|
|
{
|
|
return my_syscall0(__NR_setsid);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
pid_t setsid(void)
|
|
{
|
|
pid_t ret = sys_setsid();
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int stat(const char *path, struct stat *buf);
|
|
* Warning: the struct stat's layout is arch-dependent.
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_stat(const char *path, struct stat *buf)
|
|
{
|
|
struct sys_stat_struct stat;
|
|
long ret;
|
|
|
|
#ifdef __NR_newfstatat
|
|
/* only solution for arm64 */
|
|
ret = my_syscall4(__NR_newfstatat, AT_FDCWD, path, &stat, 0);
|
|
#elif defined(__NR_stat)
|
|
ret = my_syscall2(__NR_stat, path, &stat);
|
|
#else
|
|
#error Neither __NR_newfstatat nor __NR_stat defined, cannot implement sys_stat()
|
|
#endif
|
|
buf->st_dev = stat.st_dev;
|
|
buf->st_ino = stat.st_ino;
|
|
buf->st_mode = stat.st_mode;
|
|
buf->st_nlink = stat.st_nlink;
|
|
buf->st_uid = stat.st_uid;
|
|
buf->st_gid = stat.st_gid;
|
|
buf->st_rdev = stat.st_rdev;
|
|
buf->st_size = stat.st_size;
|
|
buf->st_blksize = stat.st_blksize;
|
|
buf->st_blocks = stat.st_blocks;
|
|
buf->st_atime = stat.st_atime;
|
|
buf->st_mtime = stat.st_mtime;
|
|
buf->st_ctime = stat.st_ctime;
|
|
return ret;
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int stat(const char *path, struct stat *buf)
|
|
{
|
|
int ret = sys_stat(path, buf);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int symlink(const char *old, const char *new);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_symlink(const char *old, const char *new)
|
|
{
|
|
#ifdef __NR_symlinkat
|
|
return my_syscall3(__NR_symlinkat, old, AT_FDCWD, new);
|
|
#elif defined(__NR_symlink)
|
|
return my_syscall2(__NR_symlink, old, new);
|
|
#else
|
|
#error Neither __NR_symlinkat nor __NR_symlink defined, cannot implement sys_symlink()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int symlink(const char *old, const char *new)
|
|
{
|
|
int ret = sys_symlink(old, new);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* mode_t umask(mode_t mode);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
mode_t sys_umask(mode_t mode)
|
|
{
|
|
return my_syscall1(__NR_umask, mode);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
mode_t umask(mode_t mode)
|
|
{
|
|
return sys_umask(mode);
|
|
}
|
|
|
|
|
|
/*
|
|
* int umount2(const char *path, int flags);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_umount2(const char *path, int flags)
|
|
{
|
|
return my_syscall2(__NR_umount2, path, flags);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int umount2(const char *path, int flags)
|
|
{
|
|
int ret = sys_umount2(path, flags);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* int unlink(const char *path);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
int sys_unlink(const char *path)
|
|
{
|
|
#ifdef __NR_unlinkat
|
|
return my_syscall3(__NR_unlinkat, AT_FDCWD, path, 0);
|
|
#elif defined(__NR_unlink)
|
|
return my_syscall1(__NR_unlink, path);
|
|
#else
|
|
#error Neither __NR_unlinkat nor __NR_unlink defined, cannot implement sys_unlink()
|
|
#endif
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
int unlink(const char *path)
|
|
{
|
|
int ret = sys_unlink(path);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* pid_t wait(int *status);
|
|
* pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);
|
|
* pid_t waitpid(pid_t pid, int *status, int options);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
|
|
{
|
|
return my_syscall4(__NR_wait4, pid, status, options, rusage);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
pid_t wait(int *status)
|
|
{
|
|
pid_t ret = sys_wait4(-1, status, 0, NULL);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
|
|
{
|
|
pid_t ret = sys_wait4(pid, status, options, rusage);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static __attribute__((unused))
|
|
pid_t waitpid(pid_t pid, int *status, int options)
|
|
{
|
|
pid_t ret = sys_wait4(pid, status, options, NULL);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* ssize_t write(int fd, const void *buf, size_t count);
|
|
*/
|
|
|
|
static __attribute__((unused))
|
|
ssize_t sys_write(int fd, const void *buf, size_t count)
|
|
{
|
|
return my_syscall3(__NR_write, fd, buf, count);
|
|
}
|
|
|
|
static __attribute__((unused))
|
|
ssize_t write(int fd, const void *buf, size_t count)
|
|
{
|
|
ssize_t ret = sys_write(fd, buf, count);
|
|
|
|
if (ret < 0) {
|
|
SET_ERRNO(-ret);
|
|
ret = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* make sure to include all global symbols */
|
|
#include "nolibc.h"
|
|
|
|
#endif /* _NOLIBC_SYS_H */
|