int __clock_gettime(clockid_t clk, struct timespec *ts)
{
int r;
#ifdef VDSO_CGT_SYM
int (*f)(clockid_t, struct timespec *) =
(int (*)(clockid_t, struct timespec *))vdso_func;
if (f) {
r = f(clk, ts);
if (!r) return r;
if (r == -EINVAL) return __syscall_ret(r);
/* Fall through on errors other than EINVAL. Some buggy
* vdso implementations return ENOSYS for clocks they
* can't handle, rather than making the syscall. This
* also handles the case where cgt_init fails to find
* a vdso function to use. */
}
#endif
r = __syscall(SYS_clock_gettime, clk, ts);
if (r == -ENOSYS) {
if (clk == CLOCK_REALTIME) {
__syscall(SYS_gettimeofday, ts, 0);
ts->tv_nsec = (int)ts->tv_nsec * 1000;
return 0;
}
r = -EINVAL;
}
return __syscall_ret(r);
}
int futimens(int fd, const struct timespec times[2])
{
int r = __syscall(SYS_utimensat, fd, 0, times, 0);
#ifdef SYS_futimesat
if (r != -ENOSYS) return __syscall_ret(r);
struct timeval *tv = 0, tmp[2];
if (times) {
int i;
tv = tmp;
for (i=0; i<2; i++) {
if (times[i].tv_nsec >= 1000000000ULL) {
if (times[i].tv_nsec == UTIME_NOW &&
times[1-i].tv_nsec == UTIME_NOW) {
tv = 0;
break;
}
if (times[i].tv_nsec == UTIME_OMIT)
return __syscall_ret(-ENOSYS);
return __syscall_ret(-EINVAL);
}
tmp[i].tv_sec = times[i].tv_sec;
tmp[i].tv_usec = times[i].tv_nsec / 1000;
}
}
r = __syscall(SYS_futimesat, fd, 0, tv);
if (r != -ENOSYS || fd != AT_FDCWD) return __syscall_ret(r);
r = __syscall(SYS_utimes, 0, tv);
#endif
return __syscall_ret(r);
}
int signalfd(int fd, const sigset_t *sigs, int flags)
{
int ret = __syscall(SYS_signalfd4, fd, sigs, _NSIG/8, flags);
if (ret != -ENOSYS) return __syscall_ret(ret);
ret = __syscall(SYS_signalfd, fd, sigs, _NSIG/8);
if (ret >= 0) {
if (flags & SFD_CLOEXEC)
__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
if (flags & SFD_NONBLOCK)
__syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
}
return __syscall_ret(ret);
}
int epoll_pwait(int fd, struct epoll_event *ev, int cnt, int to, const sigset_t *sigs)
{
int r = __syscall(SYS_epoll_pwait, fd, ev, cnt, to, sigs, _NSIG/8);
#ifdef SYS_epoll_wait
if (r==-ENOSYS && !sigs) r = __syscall(SYS_epoll_wait, fd, ev, cnt, to);
#endif
return __syscall_ret(r);
}
int epoll_create1(int flags)
{
int r = __syscall(SYS_epoll_create1, flags);
#ifdef SYS_epoll_create
if (r==-ENOSYS && !flags) r = __syscall(SYS_epoll_create, 1);
#endif
return __syscall_ret(r);
}
int fchdir(int fd)
{
int ret = __syscall(SYS_fchdir, fd);
if (ret != -EBADF || fd < 0) return __syscall_ret(ret);
char buf[15+3*sizeof(int)];
__procfdname(buf, fd);
return syscall(SYS_chdir, buf);
}
int fstat(int fd, struct stat *st)
{
int ret = __syscall(SYS_fstat, fd, mcfi_sandbox_mask(st));
if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
return __syscall_ret(ret);
char buf[15+3*sizeof(int)];
__procfdname(buf, fd);
return syscall(SYS_stat, buf, mcfi_sandbox_mask(st));
}
int fexecve(int fd, char *const argv[], char *const envp[])
{
int r = __syscall(SYS_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
if (r != -ENOSYS) return __syscall_ret(r);
char buf[15 + 3*sizeof(int)];
__procfdname(buf, fd);
execve(buf, argv, envp);
if (errno == ENOENT) errno = EBADF;
return -1;
}
int fcntl64(int fd, int cmd, ...)
{
unsigned long arg;
va_list ap;
va_start(ap, cmd);
arg = va_arg(ap, unsigned long);
va_end(ap);
if (cmd == F_SETFL) arg |= O_LARGEFILE;
if (cmd == F_SETLKW) return syscall(SYS_fcntl, fd, cmd, (void *)arg);
if (cmd == F_GETOWN) {
struct f_owner_ex ex;
int ret = __syscall(SYS_fcntl, fd, F_GETOWN_EX, &ex);
if (ret == -EINVAL) return __syscall(SYS_fcntl, fd, cmd, (void *)arg);
if (ret) return __syscall_ret(ret);
return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
}
if (cmd == F_DUPFD_CLOEXEC) {
int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
if (ret != -EINVAL) {
if (ret >= 0)
__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
if (ret != -EINVAL) {
if (ret >= 0) __syscall(SYS_close, ret);
return __syscall_ret(-EINVAL);
}
ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
switch (cmd) {
case F_SETLK:
case F_GETLK:
case F_GETOWN_EX:
case F_SETOWN_EX:
return syscall(SYS_fcntl, fd, cmd, (void *)arg);
default:
return syscall(SYS_fcntl, fd, cmd, arg);
}
}
int fchmodat(int fd, const char *path, mode_t mode, int flag)
{
if (!flag) return syscall(SYS_fchmodat, fd, path, mode, flag);
if (flag != AT_SYMLINK_NOFOLLOW)
return __syscall_ret(-EINVAL);
struct stat st;
int ret, fd2;
char proc[15+3*sizeof(int)];
if ((ret = __syscall(SYS_fstatat, fd, path, &st, flag)))
return __syscall_ret(ret);
if (S_ISLNK(st.st_mode))
return __syscall_ret(-EOPNOTSUPP);
if ((fd2 = __syscall(SYS_openat, fd, path, O_RDONLY|O_PATH|O_NOFOLLOW|O_NOCTTY)) < 0) {
if (fd2 == -ELOOP)
return __syscall_ret(-EOPNOTSUPP);
return __syscall_ret(fd2);
}
__procfdname(proc, fd2);
if (!(ret = __syscall(SYS_stat, proc, &st)) && !S_ISLNK(st.st_mode))
ret = __syscall(SYS_chmod, proc, mode);
__syscall(SYS_close, fd2);
return __syscall_ret(ret);
}
long syscall(long n, ...) {
va_list ap;
syscall_arg_t a, b, c, d, e, f;
va_start(ap, n);
a = va_arg(ap, syscall_arg_t);
b = va_arg(ap, syscall_arg_t);
c = va_arg(ap, syscall_arg_t);
d = va_arg(ap, syscall_arg_t);
e = va_arg(ap, syscall_arg_t);
f = va_arg(ap, syscall_arg_t);
va_end(ap);
return __syscall_ret(__syscall(n, a, b, c, d, e, f));
}
int fstat(int fd, struct stat* st) {
int ret = __syscall(SYS_fstat, fd, st);
if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
return __syscall_ret(ret);
char buf[15 + 3 * sizeof(int)];
__procfdname(buf, fd);
#ifdef SYS_stat
return syscall(SYS_stat, buf, st);
#else
return syscall(SYS_fstatat, AT_FDCWD, buf, st, 0);
#endif
}
int pipe2(int fd[2], int flag)
{
if (!flag) return pipe(fd);
int ret = __syscall(SYS_pipe2,mcfi_sandbox_mask(fd), flag);
if (ret != -ENOSYS) return __syscall_ret(ret);
ret = pipe(fd);
if (ret) return ret;
if (flag & O_CLOEXEC) {
__syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC);
__syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC);
}
if (flag & O_NONBLOCK) {
__syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK);
__syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK);
}
return 0;
}
void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
{
long ret;
if (off & OFF_MASK) {
errno = EINVAL;
return MAP_FAILED;
}
if (len >= PTRDIFF_MAX) {
errno = ENOMEM;
return MAP_FAILED;
}
if (flags & MAP_FIXED) {
__vm_wait();
}
#ifdef SYS_mmap2
ret = __syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);
#else
ret = __syscall(SYS_mmap, start, len, prot, flags, fd, off);
#endif
/* Fixup incorrect EPERM from kernel. */
if (ret == -EPERM && !start && (flags&MAP_ANON) && !(flags&MAP_FIXED))
ret = -ENOMEM;
return (void *)__syscall_ret(ret);
}
void *sbrk(intptr_t inc)
{
if (inc) return (void *)__syscall_ret(-ENOMEM);
return (void *)__syscall(SYS_brk, 0);
}
int sched_getparam(pid_t pid, struct sched_param *param)
{
return __syscall_ret(-ENOSYS);
}
int sched_setscheduler(pid_t pid, int sched, const struct sched_param *param)
{
return __syscall_ret(-ENOSYS);
}
