src/libunixonacid/openreadnclose_at.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

/* ISC license. */

#include <sys/types.h>
#include <errno.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>

size_t openreadnclose_at (int dirfd, char const *file, char *s, size_t n)
{
  size_t r ;
  int e ;
  int fd = open_readatb(dirfd, file) ;
  if (fd < 0) return 0 ;
  r = allread(fd, s, n) ;
  e = errno ;
  fd_close(fd) ;
  errno = e ;
  return r ;
}