1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Keith Muller of the University of California, San Diego and Lance 9 * Visser of Convex Computer Corporation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)misc.c 8.3 (Berkeley) 4/2/94"; 39 #endif 40 #endif /* not lint */ 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/types.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <inttypes.h> 49 #include <libutil.h> 50 #include <signal.h> 51 #include <stdatomic.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <time.h> 56 #include <unistd.h> 57 58 #include "dd.h" 59 #include "extern.h" 60 61 double 62 secs_elapsed(void) 63 { 64 struct timespec end, ts_res; 65 double secs, res; 66 67 if (clock_gettime(CLOCK_MONOTONIC, &end)) 68 err(1, "clock_gettime"); 69 if (clock_getres(CLOCK_MONOTONIC, &ts_res)) 70 err(1, "clock_getres"); 71 secs = (end.tv_sec - st.start.tv_sec) + \ 72 (end.tv_nsec - st.start.tv_nsec) * 1e-9; 73 res = ts_res.tv_sec + ts_res.tv_nsec * 1e-9; 74 if (secs < res) 75 secs = res; 76 77 return (secs); 78 } 79 80 void 81 summary(void) 82 { 83 double secs; 84 85 if (ddflags & C_NOINFO) 86 return; 87 88 if (ddflags & C_PROGRESS) 89 fprintf(stderr, "\n"); 90 91 secs = secs_elapsed(); 92 93 (void)fprintf(stderr, 94 "%ju+%ju records in\n%ju+%ju records out\n", 95 st.in_full, st.in_part, st.out_full, st.out_part); 96 if (st.swab) 97 (void)fprintf(stderr, "%ju odd length swab %s\n", 98 st.swab, (st.swab == 1) ? "block" : "blocks"); 99 if (st.trunc) 100 (void)fprintf(stderr, "%ju truncated %s\n", 101 st.trunc, (st.trunc == 1) ? "block" : "blocks"); 102 if (!(ddflags & C_NOXFER)) { 103 (void)fprintf(stderr, 104 "%ju bytes transferred in %.6f secs (%.0f bytes/sec)\n", 105 st.bytes, secs, st.bytes / secs); 106 } 107 need_summary = 0; 108 } 109 110 void 111 progress(void) 112 { 113 static int outlen; 114 char si[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 115 char iec[4 + 1 + 3 + 1]; /* 123 <space> <suffix> NUL */ 116 char persec[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 117 char *buf; 118 double secs; 119 120 secs = secs_elapsed(); 121 humanize_number(si, sizeof(si), (int64_t)st.bytes, "B", HN_AUTOSCALE, 122 HN_DECIMAL | HN_DIVISOR_1000); 123 humanize_number(iec, sizeof(iec), (int64_t)st.bytes, "B", HN_AUTOSCALE, 124 HN_DECIMAL | HN_IEC_PREFIXES); 125 humanize_number(persec, sizeof(persec), (int64_t)(st.bytes / secs), "B", 126 HN_AUTOSCALE, HN_DECIMAL | HN_DIVISOR_1000); 127 asprintf(&buf, " %'ju bytes (%s, %s) transferred %.3fs, %s/s", 128 (uintmax_t)st.bytes, si, iec, secs, persec); 129 outlen = fprintf(stderr, "%-*s\r", outlen, buf) - 1; 130 fflush(stderr); 131 free(buf); 132 need_progress = 0; 133 } 134 135 /* ARGSUSED */ 136 void 137 siginfo_handler(int signo __unused) 138 { 139 140 need_summary = 1; 141 } 142 143 /* ARGSUSED */ 144 void 145 sigalarm_handler(int signo __unused) 146 { 147 148 need_progress = 1; 149 } 150 151 static void terminate(int signo) __dead2; 152 static void 153 terminate(int signo) 154 { 155 kill_signal = signo; 156 summary(); 157 (void)fflush(stderr); 158 raise(kill_signal); 159 /* NOT REACHED */ 160 _exit(1); 161 } 162 163 static sig_atomic_t in_io = 0; 164 static sig_atomic_t sigint_seen = 0; 165 166 static void 167 sigint_handler(int signo __unused) 168 { 169 atomic_signal_fence(memory_order_acquire); 170 if (in_io) 171 terminate(SIGINT); 172 sigint_seen = 1; 173 } 174 175 void 176 prepare_io(void) 177 { 178 struct sigaction sa; 179 int error; 180 181 memset(&sa, 0, sizeof(sa)); 182 sa.sa_flags = SA_NODEFER | SA_RESETHAND; 183 sa.sa_handler = sigint_handler; 184 error = sigaction(SIGINT, &sa, 0); 185 if (error != 0) 186 err(1, "sigaction"); 187 } 188 189 void 190 before_io(void) 191 { 192 in_io = 1; 193 atomic_signal_fence(memory_order_seq_cst); 194 if (sigint_seen) 195 terminate(SIGINT); 196 } 197 198 void 199 after_io(void) 200 { 201 in_io = 0; 202 atomic_signal_fence(memory_order_seq_cst); 203 if (sigint_seen) 204 terminate(SIGINT); 205 } 206