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
secs_elapsed(void)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
summary(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
progress(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
siginfo_handler(int signo __unused)135 siginfo_handler(int signo __unused)
136 {
137
138 need_summary = 1;
139 }
140
141 /* ARGSUSED */
142 void
sigalarm_handler(int signo __unused)143 sigalarm_handler(int signo __unused)
144 {
145
146 need_progress = 1;
147 }
148
149 static void terminate(int signo) __dead2;
150 static void
terminate(int signo)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
sigint_handler(int signo __unused)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
prepare_io(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
before_io(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
after_io(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