1 /* $NetBSD: support.c,v 1.3 2025/02/11 17:48:30 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 #ifdef HAVE_SYS_CDEFS_H 36 #include <sys/cdefs.h> 37 #endif 38 __RCSID("$NetBSD: support.c,v 1.3 2025/02/11 17:48:30 christos Exp $"); 39 40 #include <time.h> 41 #include <string.h> 42 #include <stdio.h> 43 #include <stdarg.h> 44 #include <errno.h> 45 #include <stdlib.h> 46 #include <inttypes.h> 47 48 #include "support.h" 49 50 static __attribute__((__format_arg__(3))) const char * 51 expandm(char *buf, size_t len, const char *fmt) 52 { 53 char *p; 54 size_t r; 55 56 if ((p = strstr(fmt, "%m")) == NULL) 57 return fmt; 58 59 r = (size_t)(p - fmt); 60 if (r >= len) 61 return fmt; 62 63 strlcpy(buf, fmt, r + 1); 64 strlcat(buf, strerror(errno), len); 65 strlcat(buf, fmt + r + 2, len); 66 67 return buf; 68 } 69 70 void 71 vdlog(int level __unused, struct syslog_data *sd __unused, 72 const char *fmt, va_list ap) 73 { 74 char buf[BUFSIZ]; 75 76 // fprintf(stderr, "%s: ", getprogname()); 77 vfprintf(stderr, expandm(buf, sizeof(buf), fmt), ap); 78 fprintf(stderr, "\n"); 79 } 80 81 void 82 dlog(int level, const char *fmt, ...) 83 { 84 va_list ap; 85 86 va_start(ap, fmt); 87 vdlog(level, NULL, fmt, ap); 88 va_end(ap); 89 } 90 91 const char * 92 fmttime(char *b, size_t l, time_t t) 93 { 94 struct tm tm; 95 if (localtime_r(&t, &tm) == NULL) 96 snprintf(b, l, "*%jd*", (intmax_t)t); 97 else 98 strftime(b, l, "%Y/%m/%d %H:%M:%S", &tm); 99 return b; 100 } 101 102 const char * 103 fmtydhms(char *b, size_t l, time_t t) 104 { 105 time_t s, m, h, d, y; 106 int z; 107 size_t o; 108 109 s = t % 60; 110 t /= 60; 111 112 m = t % 60; 113 t /= 60; 114 115 h = t % 24; 116 t /= 24; 117 118 d = t % 365; 119 t /= 365; 120 121 y = t; 122 123 z = 0; 124 o = 0; 125 #define APPEND(a) \ 126 if (a) { \ 127 z = snprintf(b + o, l - o, "%jd%s", (intmax_t)a, __STRING(a)); \ 128 if (z == -1) \ 129 return b; \ 130 o += (size_t)z; \ 131 if (o >= l) \ 132 return b; \ 133 } 134 APPEND(y) 135 APPEND(d) 136 APPEND(h) 137 APPEND(m) 138 APPEND(s) 139 return b; 140 } 141 142 ssize_t 143 blhexdump(char *buf, size_t len, const char *str, const void *b, size_t l) 144 { 145 size_t z, cz; 146 int r; 147 const unsigned char *p = b; 148 const unsigned char *e = p + l; 149 150 r = snprintf(buf, len, "%s: ", str); 151 if (r == -1) 152 return -1; 153 if ((cz = z = (size_t)r) >= len) 154 cz = len; 155 156 while (p < e) { 157 r = snprintf(buf + cz, len - cz, "%.2x", *p++); 158 if (r == -1) 159 return -1; 160 if ((cz = (z += (size_t)r)) >= len) 161 cz = len; 162 } 163 return (ssize_t)z; 164 } 165