LXR busybox/libbb/safe

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Utility routines.
   4 *
   5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6 *
   7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8 */
   9#include "libbb.h"
  10
  11ssize_t FAST_FUNC safe_write(int fd, const void *buf, size_t count)
  12{
  13        ssize_t n;
  14
  15        for (;;) {
  16                n = write(fd, buf, count);
  17                if (n >= 0 || errno != EINTR)
  18                        break;
  19                /* Some callers set errno=0, are upset when they see EINTR.
  20                 * Returning EINTR is wrong since we retry write(),
  21                 * the "error" was transient.
  22                 */
  23                errno = 0;
  24                /* repeat the write() */
  25        }
  26
  27        return n;
  28}
  29