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 #include <sys/types.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <inttypes.h> 47 #include <libutil.h> 48 #include <signal.h> 49 #include <stdatomic.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <time.h> 54 #include <unistd.h> 55 56 #include "dd.h" 57 #include "extern.h" 58 59 double 60 secs_elapsed(void) 61 { 62 struct timespec end, ts_res; 63 double secs, res; 64 65 if (clock_gettime(CLOCK_MONOTONIC, &end)) 66 err(1, "clock_gettime"); 67 if (clock_getres(CLOCK_MONOTONIC, &ts_res)) 68 err(1, "clock_getres"); 69 secs = (end.tv_sec - st.start.tv_sec) + \ 70 (end.tv_nsec - st.start.tv_nsec) * 1e-9; 71 res = ts_res.tv_sec + ts_res.tv_nsec * 1e-9; 72 if (secs < res) 73 secs = res; 74 75 return (secs); 76 } 77 78 void 79 summary(void) 80 { 81 double secs; 82 83 if (ddflags & C_NOINFO) 84 return; 85 86 if (ddflags & C_PROGRESS) 87 fprintf(stderr, "\n"); 88 89 secs = secs_elapsed(); 90 91 (void)fprintf(stderr, 92 "%ju+%ju records in\n%ju+%ju records out\n", 93 st.in_full, st.in_part, st.out_full, st.out_part); 94 if (st.swab) 95 (void)fprintf(stderr, "%ju odd length swab %s\n", 96 st.swab, (st.swab == 1) ? "block" : "blocks"); 97 if (st.trunc) 98 (void)fprintf(stderr, "%ju truncated %s\n", 99 st.trunc, (st.trunc == 1) ? "block" : "blocks"); 100 if (!(ddflags & C_NOXFER)) { 101 (void)fprintf(stderr, 102 "%ju bytes transferred in %.6f secs (%.0f bytes/sec)\n", 103 st.bytes, secs, st.bytes / secs); 104 } 105 need_summary = 0; 106 } 107 108 void 109 progress(void) 110 { 111 static int outlen; 112 char si[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 113 char iec[4 + 1 + 3 + 1]; /* 123 <space> <suffix> NUL */ 114 char persec[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 115 char *buf; 116 double secs; 117 118 secs = secs_elapsed(); 119 humanize_number(si, sizeof(si), (int64_t)st.bytes, "B", HN_AUTOSCALE, 120 HN_DECIMAL | HN_DIVISOR_1000); 121 humanize_number(iec, sizeof(iec), (int64_t)st.bytes, "B", HN_AUTOSCALE, 122 HN_DECIMAL | HN_IEC_PREFIXES); 123 humanize_number(persec, sizeof(persec), (int64_t)(st.bytes / secs), "B", 124 HN_AUTOSCALE, HN_DECIMAL | HN_DIVISOR_1000); 125 asprintf(&buf, " %'ju bytes (%s, %s) transferred %.3fs, %s/s", 126 (uintmax_t)st.bytes, si, iec, secs, persec); 127 outlen = fprintf(stderr, "%-*s\r", outlen, buf) - 1; 128 fflush(stderr); 129 free(buf); 130 need_progress = 0; 131 } 132 133 /* ARGSUSED */ 134 void 135 siginfo_handler(int signo __unused) 136 { 137 138 need_summary = 1; 139 } 140 141 /* ARGSUSED */ 142 void 143 sigalarm_handler(int signo __unused) 144 { 145 146 need_progress = 1; 147 } 148 149 static void terminate(int signo) __dead2; 150 static void 151 terminate(int signo) 152 { 153 kill_signal = signo; 154 summary(); 155 (void)fflush(stderr); 156 raise(kill_signal); 157 /* NOT REACHED */ 158 _exit(1); 159 } 160 161 static sig_atomic_t in_io = 0; 162 static sig_atomic_t sigint_seen = 0; 163 164 static void 165 sigint_handler(int signo __unused) 166 { 167 atomic_signal_fence(memory_order_acquire); 168 if (in_io) 169 terminate(SIGINT); 170 sigint_seen = 1; 171 } 172 173 void 174 prepare_io(void) 175 { 176 struct sigaction sa; 177 int error; 178 179 memset(&sa, 0, sizeof(sa)); 180 sa.sa_flags = SA_NODEFER | SA_RESETHAND; 181 sa.sa_handler = sigint_handler; 182 error = sigaction(SIGINT, &sa, 0); 183 if (error != 0) 184 err(1, "sigaction"); 185 } 186 187 void 188 before_io(void) 189 { 190 in_io = 1; 191 atomic_signal_fence(memory_order_seq_cst); 192 if (sigint_seen) 193 terminate(SIGINT); 194 } 195 196 void 197 after_io(void) 198 { 199 in_io = 0; 200 atomic_signal_fence(memory_order_seq_cst); 201 if (sigint_seen) 202 terminate(SIGINT); 203 } 204