lib/libc/stdio/xprintf_errno.c

   1 /*-
   2  * Copyright (c) 2005 Poul-Henning Kamp
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libc/stdio/xprintf_errno.c,v 1.1 2006/01/25 12:45:24 phk Exp $
  27  */
  28
  29 #include <namespace.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <wchar.h>
  34 #include <vis.h>
  35 #include <assert.h>
  36 #include <sys/time.h>
  37 #include "printf.h"
  38
  39 int
  40 __printf_arginfo_errno(const struct printf_info *pi __unused, size_t n,
  41                        int *argt)
  42 {
  43
  44         assert(n >= 1);
  45         argt[0] = PA_INT;
  46         return (1);
  47 }
  48
  49 int
  50 __printf_render_errno(struct __printf_io *io,
  51                       const struct printf_info *pi __unused,
  52                       const void *const *arg)
  53 {
  54         int ret, error;
  55         char buf[64];
  56         const char *p;
  57
  58         ret = 0;
  59         error = *((const int *)arg[0]);
  60         if (error >= 0 && error < sys_nerr) {
  61                 p = strerror(error);
  62                 return (__printf_out(io, pi, p, strlen(p)));
  63         }
  64         sprintf(buf, "errno=%d/0x%x", error, error);
  65         ret += __printf_out(io, pi, buf, strlen(buf));
  66         __printf_flush(io);
  67         return(ret);
  68 }