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 #endif /* not lint */ 38 #include <sys/cdefs.h> 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <inttypes.h> 44 #include <libutil.h> 45 #include <signal.h> 46 #include <stdatomic.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <time.h> 51 #include <unistd.h> 52 53 #include "dd.h" 54 #include "extern.h" 55 56 double 57 secs_elapsed(void) 58 { 59 struct timespec end, ts_res; 60 double secs, res; 61 62 if (clock_gettime(CLOCK_MONOTONIC, &end)) 63 err(1, "clock_gettime"); 64 if (clock_getres(CLOCK_MONOTONIC, &ts_res)) 65 err(1, "clock_getres"); 66 secs = (end.tv_sec - st.start.tv_sec) + \ 67 (end.tv_nsec - st.start.tv_nsec) * 1e-9; 68 res = ts_res.tv_sec + ts_res.tv_nsec * 1e-9; 69 if (secs < res) 70 secs = res; 71 72 return (secs); 73 } 74 75 void 76 summary(void) 77 { 78 double secs; 79 80 if (ddflags & C_NOINFO) 81 return; 82 83 if (ddflags & C_PROGRESS) 84 fprintf(stderr, "\n"); 85 86 secs = secs_elapsed(); 87 88 (void)fprintf(stderr, 89 "%ju+%ju records in\n%ju+%ju records out\n", 90 st.in_full, st.in_part, st.out_full, st.out_part); 91 if (st.swab) 92 (void)fprintf(stderr, "%ju odd length swab %s\n", 93 st.swab, (st.swab == 1) ? "block" : "blocks"); 94 if (st.trunc) 95 (void)fprintf(stderr, "%ju truncated %s\n", 96 st.trunc, (st.trunc == 1) ? "block" : "blocks"); 97 if (!(ddflags & C_NOXFER)) { 98 (void)fprintf(stderr, 99 "%ju bytes transferred in %.6f secs (%.0f bytes/sec)\n", 100 st.bytes, secs, st.bytes / secs); 101 } 102 need_summary = 0; 103 } 104 105 void 106 progress(void) 107 { 108 static int outlen; 109 char si[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 110 char iec[4 + 1 + 3 + 1]; /* 123 <space> <suffix> NUL */ 111 char persec[4 + 1 + 2 + 1]; /* 123 <space> <suffix> NUL */ 112 char *buf; 113 double secs; 114 115 secs = secs_elapsed(); 116 humanize_number(si, sizeof(si), (int64_t)st.bytes, "B", HN_AUTOSCALE, 117 HN_DECIMAL | HN_DIVISOR_1000); 118 humanize_number(iec, sizeof(iec), (int64_t)st.bytes, "B", HN_AUTOSCALE, 119 HN_DECIMAL | HN_IEC_PREFIXES); 120 humanize_number(persec, sizeof(persec), (int64_t)(st.bytes / secs), "B", 121 HN_AUTOSCALE, HN_DECIMAL | HN_DIVISOR_1000); 122 asprintf(&buf, " %'ju bytes (%s, %s) transferred %.3fs, %s/s", 123 (uintmax_t)st.bytes, si, iec, secs, persec); 124 outlen = fprintf(stderr, "%-*s\r", outlen, buf) - 1; 125 fflush(stderr); 126 free(buf); 127 need_progress = 0; 128 } 129 130 /* ARGSUSED */ 131 void 132 siginfo_handler(int signo __unused) 133 { 134 135 need_summary = 1; 136 } 137 138 /* ARGSUSED */ 139 void 140 sigalarm_handler(int signo __unused) 141 { 142 143 need_progress = 1; 144 } 145 146 static void terminate(int signo) __dead2; 147 static void 148 terminate(int signo) 149 { 150 kill_signal = signo; 151 summary(); 152 (void)fflush(stderr); 153 raise(kill_signal); 154 /* NOT REACHED */ 155 _exit(1); 156 } 157 158 static sig_atomic_t in_io = 0; 159 static sig_atomic_t sigint_seen = 0; 160 161 static void 162 sigint_handler(int signo __unused) 163 { 164 atomic_signal_fence(memory_order_acquire); 165 if (in_io) 166 terminate(SIGINT); 167 sigint_seen = 1; 168 } 169 170 void 171 prepare_io(void) 172 { 173 struct sigaction sa; 174 int error; 175 176 memset(&sa, 0, sizeof(sa)); 177 sa.sa_flags = SA_NODEFER | SA_RESETHAND; 178 sa.sa_handler = sigint_handler; 179 error = sigaction(SIGINT, &sa, 0); 180 if (error != 0) 181 err(1, "sigaction"); 182 } 183 184 void 185 before_io(void) 186 { 187 in_io = 1; 188 atomic_signal_fence(memory_order_seq_cst); 189 if (sigint_seen) 190 terminate(SIGINT); 191 } 192 193 void 194 after_io(void) 195 { 196 in_io = 0; 197 atomic_signal_fence(memory_order_seq_cst); 198 if (sigint_seen) 199 terminate(SIGINT); 200 } 201