external/bsd/blacklist/bin/support.c

   1 /*      $NetBSD: support.c,v 1.7 2015/06/02 14:02:10 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2015 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #ifdef HAVE_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #include <sys/cdefs.h>
  36 __RCSID("$NetBSD: support.c,v 1.7 2015/06/02 14:02:10 christos Exp $");
  37
  38 #include <time.h>
  39 #include <string.h>
  40 #include <stdio.h>
  41 #include <stdarg.h>
  42 #include <errno.h>
  43 #include <stdlib.h>
  44 #include <inttypes.h>
  45
  46 #include "support.h"
  47
  48 static __attribute__((__format_arg__(3))) const char *
  49 expandm(char *buf, size_t len, const char *fmt)
  50 {
  51         char *p;
  52         size_t r;
  53
  54         if ((p = strstr(fmt, "%m")) == NULL)
  55                 return fmt;
  56
  57         r = (size_t)(p - fmt);
  58         if (r >= len)
  59                 return fmt;
  60
  61         strlcpy(buf, fmt, r + 1);
  62         strlcat(buf, strerror(errno), len);
  63         strlcat(buf, fmt + r + 2, len);
  64
  65         return buf;
  66 }
  67
  68 void
  69 vdlog(int level __unused, const char *fmt, va_list ap)
  70 {
  71         char buf[BUFSIZ];
  72
  73 //      fprintf(stderr, "%s: ", getprogname());
  74         vfprintf(stderr, expandm(buf, sizeof(buf), fmt), ap);
  75         fprintf(stderr, "\n");
  76 }
  77
  78 void
  79 dlog(int level, const char *fmt, ...)
  80 {
  81         va_list ap;
  82
  83         va_start(ap, fmt);
  84         vdlog(level, fmt, ap);
  85         va_end(ap);
  86 }
  87
  88 const char *
  89 fmttime(char *b, size_t l, time_t t)
  90 {
  91         struct tm tm;
  92         if (localtime_r(&t, &tm) == NULL)
  93                 snprintf(b, l, "*%jd*", (intmax_t)t);
  94         else
  95                 strftime(b, l, "%Y/%m/%d %H:%M:%S", &tm);
  96         return b;
  97 }
  98
  99 const char *
 100 fmtydhms(char *b, size_t l, time_t t)
 101 {
 102         time_t s, m, h, d, y;
 103         int z;
 104         size_t o;
 105
 106         s = t % 60;
 107         t /= 60;
 108         m = t % 60;
 109         t /= 60;
 110         h = t % 60;
 111         t /= 24;
 112         d = t % 24;
 113         t /= 356;
 114         y = t;
 115
 116         z = 0;
 117         o = 0;
 118 #define APPEND(a) \
 119         if (a) { \
 120                 z = snprintf(b + o, l - o, "%jd%s", (intmax_t)a, __STRING(a)); \
 121                 if (z == -1) \
 122                         return b; \
 123                 o += (size_t)z; \
 124                 if (o >= l) \
 125                         return b; \
 126         }
 127         APPEND(y)
 128         APPEND(d)
 129         APPEND(h)
 130         APPEND(m)
 131         APPEND(s)
 132         return b;
 133 }
 134
 135 ssize_t
 136 hexdump(char *buf, size_t len, const char *str, const void *b, size_t l)
 137 {
 138         size_t z, cz;
 139         int r;
 140         const unsigned char *p = b;
 141         const unsigned char *e = p + l;
 142
 143         r = snprintf(buf, len, "%s: ", str);
 144         if (r == -1)
 145                 return -1;
 146         if ((cz = z = (size_t)r) >= len)
 147                 cz = len;
 148
 149         while (p < e) {
 150                 r = snprintf(buf + cz, len - cz, "%.2x", *p++);
 151                 if (r == -1)
 152                         return -1;
 153                 if ((cz = (z += (size_t)r)) >= len)
 154                         cz = len;
 155         }
 156         return (ssize_t)z;
 157 }