1 /* $NetBSD: support.c,v 1.9 2018/09/18 22:12:19 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 1.9 2018/09/18 22:12:19 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; 108 109 m = t % 60; 110 t /= 60; 111 112 h = t % 24; 113 t /= 24; 114 115 d = t % 365; 116 t /= 365; 117 118 y = t; 119 120 z = 0; 121 o = 0; 122 #define APPEND(a) \ 123 if (a) { \ 124 z = snprintf(b + o, l - o, "%jd%s", (intmax_t)a, __STRING(a)); \ 125 if (z == -1) \ 126 return b; \ 127 o += (size_t)z; \ 128 if (o >= l) \ 129 return b; \ 130 } 131 APPEND(y) 132 APPEND(d) 133 APPEND(h) 134 APPEND(m) 135 APPEND(s) 136 return b; 137 } 138 139 ssize_t 140 blhexdump(char *buf, size_t len, const char *str, const void *b, size_t l) 141 { 142 size_t z, cz; 143 int r; 144 const unsigned char *p = b; 145 const unsigned char *e = p + l; 146 147 r = snprintf(buf, len, "%s: ", str); 148 if (r == -1) 149 return -1; 150 if ((cz = z = (size_t)r) >= len) 151 cz = len; 152 153 while (p < e) { 154 r = snprintf(buf + cz, len - cz, "%.2x", *p++); 155 if (r == -1) 156 return -1; 157 if ((cz = (z += (size_t)r)) >= len) 158 cz = len; 159 } 160 return (ssize_t)z; 161 } 162