linux-syscalls.c File Reference

#include "linux-syscalls.h"
#include <unistd.h>
#include <signal.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <errno.h>

Go to the source code of this file.

Functions
int	uv__sendmmsg (int fd, struct uv__mmsghdr *mmsg, unsigned int vlen)
int	uv__recvmmsg (int fd, struct uv__mmsghdr *mmsg, unsigned int vlen)
ssize_t	uv__preadv (int fd, const struct iovec *iov, int iovcnt, int64_t offset)
ssize_t	uv__pwritev (int fd, const struct iovec *iov, int iovcnt, int64_t offset)
int	uv__dup3 (int oldfd, int newfd, int flags)
ssize_t	uv__fs_copy_file_range (int fd_in, ssize_t *off_in, int fd_out, ssize_t *off_out, size_t len, unsigned int flags)
int	uv__statx (int dirfd, const char *path, int flags, unsigned int mask, struct uv__statx *statxbuf)
ssize_t	uv__getrandom (void *buf, size_t buflen, unsigned flags)

Function Documentation

uv__dup3()

int uv__dup3	(	int	oldfd,
		int	newfd,
		int	flags
	)

Definition at line 214 of file linux-syscalls.c.

                                              {
#if defined(__NR_dup3)
  return syscall(__NR_dup3, oldfd, newfd, flags);
#else
  return errno = ENOSYS, -1;
#endif
}

References __NR_dup3, flags, oldfd, and syscall.

uv__fs_copy_file_range()

ssize_t uv__fs_copy_file_range	(	int	fd_in,
		ssize_t *	off_in,
		int	fd_out,
		ssize_t *	off_out,
		size_t	len,
		unsigned int	flags
	)

Definition at line 224 of file linux-syscalls.c.

{
#ifdef __NR_copy_file_range
  return syscall(__NR_copy_file_range,
                 fd_in,
                 off_in,
                 fd_out,
                 off_out,
                 len,
                 flags);
#else
  return errno = ENOSYS, -1;
#endif
}

References flags, len, and syscall.

Referenced by uv__fs_sendfile().

uv__getrandom()

ssize_t uv__getrandom	(	void *	buf,
		size_t	buflen,
		unsigned	flags
	)

Definition at line 261 of file linux-syscalls.c.

                                                                {
#if defined(__NR_getrandom)
  return syscall(__NR_getrandom, buf, buflen, flags);
#else
  return errno = ENOSYS, -1;
#endif
}

References buflen, flags, and syscall.

uv__preadv()

ssize_t uv__preadv	(	int	fd,
		const struct iovec *	iov,
		int	iovcnt,
		int64_t	offset
	)

Definition at line 196 of file linux-syscalls.c.

                                                                                {
#if defined(__NR_preadv)
  return syscall(__NR_preadv, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
#else
  return errno = ENOSYS, -1;
#endif
}

References __NR_preadv, fd, iov, and syscall.

Referenced by uv__fs_read().

uv__pwritev()

ssize_t uv__pwritev	(	int	fd,
		const struct iovec *	iov,
		int	iovcnt,
		int64_t	offset
	)

Definition at line 205 of file linux-syscalls.c.

                                                                                 {
#if defined(__NR_pwritev)
  return syscall(__NR_pwritev, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
#else
  return errno = ENOSYS, -1;
#endif
}

References __NR_pwritev, fd, iov, and syscall.

Referenced by uv__fs_write().

uv__recvmmsg()

int uv__recvmmsg	(	int	fd,
		struct uv__mmsghdr *	mmsg,
		unsigned int	vlen
	)

Definition at line 170 of file linux-syscalls.c.

                                                                      {
#if defined(__i386__)
  unsigned long args[5];
  int rc;
 
  args[0] = (unsigned long) fd;
  args[1] = (unsigned long) mmsg;
  args[2] = (unsigned long) vlen;
  args[3] = /* flags */ 0;
  args[4] = /* timeout */ 0;
 
  /* socketcall() raises EINVAL when SYS_RECVMMSG is not supported. */
  rc = syscall(/* __NR_socketcall */ 102, 19 /* SYS_RECVMMSG */, args);
  if (rc == -1)
    if (errno == EINVAL)
      errno = ENOSYS;
 
  return rc;
#elif defined(__NR_recvmmsg)
  return syscall(__NR_recvmmsg, fd, mmsg, vlen, /* flags */ 0, /* timeout */ 0);
#else
  return errno = ENOSYS, -1;
#endif
}

References args, EINVAL, fd, long, and syscall.

uv__sendmmsg()

int uv__sendmmsg	(	int	fd,
		struct uv__mmsghdr *	mmsg,
		unsigned int	vlen
	)

Definition at line 145 of file linux-syscalls.c.

                                                                      {
#if defined(__i386__)
  unsigned long args[4];
  int rc;
 
  args[0] = (unsigned long) fd;
  args[1] = (unsigned long) mmsg;
  args[2] = (unsigned long) vlen;
  args[3] = /* flags */ 0;
 
  /* socketcall() raises EINVAL when SYS_SENDMMSG is not supported. */
  rc = syscall(/* __NR_socketcall */ 102, 20 /* SYS_SENDMMSG */, args);
  if (rc == -1)
    if (errno == EINVAL)
      errno = ENOSYS;
 
  return rc;
#elif defined(__NR_sendmmsg)
  return syscall(__NR_sendmmsg, fd, mmsg, vlen, /* flags */ 0);
#else
  return errno = ENOSYS, -1;
#endif
}

References args, EINVAL, fd, long, and syscall.

uv__statx()

int uv__statx	(	int	dirfd,
		const char *	path,
		int	flags,
		unsigned int	mask,
		struct uv__statx *	statxbuf
	)

Definition at line 245 of file linux-syscalls.c.

                                          {
  /* __NR_statx make Android box killed by SIGSYS.
   * That looks like a seccomp2 sandbox filter rejecting the system call.
   */
#if defined(__NR_statx) && !defined(__ANDROID__)
  return syscall(__NR_statx, dirfd, path, flags, mask, statxbuf);
#else
  return errno = ENOSYS, -1;
#endif
}

References flags, mask, path, and syscall.

Referenced by uv__fs_statx().