1/* $NetBSD: support.c,v 1.8 2016/04/04 15:52:56 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 1.8 2016/04/04 15:52:56 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 48static __attribute__((__format_arg__(3))) const char * 49expandm(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 68void 69vdlog(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 78void 79dlog(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 88const char * 89fmttime(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 99const char * 100fmtydhms(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 135ssize_t 136blhexdump(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} 158