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authorRob Landley <rob@landley.net>2006-05-16 16:52:12 +0000
committerRob Landley <rob@landley.net>2006-05-16 16:52:12 +0000
commit2686d3bc38dd1b296c4191160bd4336c0ed11388 (patch)
tree56a2608bb8209cd8f2043396b8dc54fd5fe8feb0
parentadde79883ffe726fc3237edb4756a99fba608797 (diff)
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Rob Sullivan cleaned up the longstanding patch from Hideki IWAMOTO to add
ibs and obs support to dd, and made it configurable. I cleaned it up a bit further and moved conv= into the same config option.
Diffstat
-rw-r--r--coreutils/Config.in8
-rw-r--r--coreutils/dd.c139
-rw-r--r--include/usage.h14
-rw-r--r--patches/dd_ibs_and_obs.diff252
4 files changed, 100 insertions, 313 deletions
diff --git a/coreutils/Config.in b/coreutils/Config.in
index d0ac000d3..d7e31e868 100644
--- a/coreutils/Config.in
+++ b/coreutils/Config.in
@@ -127,6 +127,14 @@ config CONFIG_FEATURE_DD_SIGNAL_HANDLING
127 $ dd if=/dev/zero of=/dev/null& pid=$! $ kill -USR1 $pid; sleep 1; kill $pid 127 $ dd if=/dev/zero of=/dev/null& pid=$! $ kill -USR1 $pid; sleep 1; kill $pid
128 10899206+0 records in 10899206+0 records out 128 10899206+0 records in 10899206+0 records out
129 129
130config CONFIG_FEATURE_DD_IBS_OBS
131 bool "Enable ibs, obs and conv options"
132 default n
133 depends on CONFIG_DD
134 help
135 Enables support for writing a certain number of bytes in and out,
136 at a time, and performing conversions on the data stream.
137
130config CONFIG_DF 138config CONFIG_DF
131 bool "df" 139 bool "df"
132 default n 140 default n
diff --git a/coreutils/dd.c b/coreutils/dd.c
index 378e212de..53aa085ed 100644
--- a/coreutils/dd.c
+++ b/coreutils/dd.c
@@ -45,21 +45,13 @@ static void dd_output_status(int cur_signal)
45 45
46int dd_main(int argc, char **argv) 46int dd_main(int argc, char **argv)
47{ 47{
48 size_t count = -1; 48 size_t count = -1, oc = 0, ibs = 512, obs = 512;
49 size_t bs = 512;
50 ssize_t n; 49 ssize_t n;
51 off_t seek = 0; 50 off_t seek = 0, skip = 0;
52 off_t skip = 0; 51 int sync_flag = FALSE, noerror = FALSE, trunc_flag = TRUE, twobufs_flag = 0,
53 int sync_flag = FALSE; 52 oflag, ifd, ofd, i;
54 int noerror = FALSE; 53 const char *infile = NULL, *outfile = NULL;
55 int trunc_flag = TRUE; 54 char *ibuf, *obuf;
56 int oflag;
57 int ifd;
58 int ofd;
59 int i;
60 const char *infile = NULL;
61 const char *outfile = NULL;
62 char *buf;
63 55
64 if (ENABLE_FEATURE_DD_SIGNAL_HANDLING) 56 if (ENABLE_FEATURE_DD_SIGNAL_HANDLING)
65 { 57 {
@@ -73,43 +65,49 @@ int dd_main(int argc, char **argv)
73 } 65 }
74 66
75 for (i = 1; i < argc; i++) { 67 for (i = 1; i < argc; i++) {
76 if (strncmp("bs=", argv[i], 3) == 0) 68 if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("ibs=", argv[i], 4)) {
77 bs = bb_xparse_number(argv[i]+3, dd_suffixes); 69 ibs = bb_xparse_number(argv[i]+4, dd_suffixes);
78 else if (strncmp("count=", argv[i], 6) == 0) 70 twobufs_flag++;
71 } else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("obs=", argv[i], 4)) {
72 obs = bb_xparse_number(argv[i]+4, dd_suffixes);
73 twobufs_flag++;
74 } else if (!strncmp("bs=", argv[i], 3)) {
75 ibs = obs = bb_xparse_number(argv[i]+3, dd_suffixes);
76 } else if (!strncmp("count=", argv[i], 6))
79 count = bb_xparse_number(argv[i]+6, dd_suffixes); 77 count = bb_xparse_number(argv[i]+6, dd_suffixes);
80 else if (strncmp("seek=", argv[i], 5) == 0) 78 else if (!strncmp("seek=", argv[i], 5))
81 seek = bb_xparse_number(argv[i]+5, dd_suffixes); 79 seek = bb_xparse_number(argv[i]+5, dd_suffixes);
82 else if (strncmp("skip=", argv[i], 5) == 0) 80 else if (!strncmp("skip=", argv[i], 5))
83 skip = bb_xparse_number(argv[i]+5, dd_suffixes); 81 skip = bb_xparse_number(argv[i]+5, dd_suffixes);
84 else if (strncmp("if=", argv[i], 3) == 0) 82 else if (!strncmp("if=", argv[i], 3))
85 infile = argv[i]+3; 83 infile = argv[i]+3;
86 else if (strncmp("of=", argv[i], 3) == 0) 84 else if (!strncmp("of=", argv[i], 3))
87 outfile = argv[i]+3; 85 outfile = argv[i]+3;
88 else if (strncmp("conv=", argv[i], 5) == 0) { 86 else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("conv=", argv[i], 5)) {
89 buf = argv[i]+5; 87 ibuf = argv[i]+5;
90 while (1) { 88 while (1) {
91 if (strncmp("notrunc", buf, 7) == 0) { 89 if (!strncmp("notrunc", ibuf, 7)) {
92 trunc_flag = FALSE; 90 trunc_flag = FALSE;
93 buf += 7; 91 ibuf += 7;
94 } else if (strncmp("sync", buf, 4) == 0) { 92 } else if (!strncmp("sync", ibuf, 4)) {
95 sync_flag = TRUE; 93 sync_flag = TRUE;
96 buf += 4; 94 ibuf += 4;
97 } else if (strncmp("noerror", buf, 7) == 0) { 95 } else if (!strncmp("noerror", ibuf, 7)) {
98 noerror = TRUE; 96 noerror = TRUE;
99 buf += 7; 97 ibuf += 7;
100 } else { 98 } else {
101 bb_error_msg_and_die("invalid conversion `%s'", argv[i]+5); 99 bb_error_msg_and_die("invalid conversion `%s'", argv[i]+5);
102 } 100 }
103 if (buf[0] == '\0') 101 if (ibuf[0] == '\0') break;
104 break; 102 if (ibuf[0] == ',') ibuf++;
105 if (buf[0] == ',')
106 buf++;
107 } 103 }
108 } else 104 } else
109 bb_show_usage(); 105 bb_show_usage();
110 } 106 }
107 ibuf = xmalloc(ibs);
111 108
112 buf = xmalloc(bs); 109 if (twobufs_flag) obuf = xmalloc(obs);
110 else obuf = ibuf;
113 111
114 if (infile != NULL) { 112 if (infile != NULL) {
115 ifd = bb_xopen(infile, O_RDONLY); 113 ifd = bb_xopen(infile, O_RDONLY);
@@ -128,7 +126,7 @@ int dd_main(int argc, char **argv)
128 ofd = bb_xopen3(outfile, oflag, 0666); 126 ofd = bb_xopen3(outfile, oflag, 0666);
129 127
130 if (seek && trunc_flag) { 128 if (seek && trunc_flag) {
131 if (ftruncate(ofd, seek * bs) < 0) { 129 if (ftruncate(ofd, seek * obs) < 0) {
132 struct stat st; 130 struct stat st;
133 131
134 if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) || 132 if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
@@ -143,13 +141,19 @@ int dd_main(int argc, char **argv)
143 } 141 }
144 142
145 if (skip) { 143 if (skip) {
146 if (lseek(ifd, skip * bs, SEEK_CUR) < 0) { 144 if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
147 bb_perror_msg_and_die("%s", infile); 145 while (skip-- > 0) {
146 n = safe_read(ifd, ibuf, ibs);
147 if (n < 0)
148 bb_perror_msg_and_die("%s", infile);
149 if (n == 0)
150 break;
151 }
148 } 152 }
149 } 153 }
150 154
151 if (seek) { 155 if (seek) {
152 if (lseek(ofd, seek * bs, SEEK_CUR) < 0) { 156 if (lseek(ofd, seek * obs, SEEK_CUR) < 0) {
153 bb_perror_msg_and_die("%s", outfile); 157 bb_perror_msg_and_die("%s", outfile);
154 } 158 }
155 } 159 }
@@ -157,40 +161,63 @@ int dd_main(int argc, char **argv)
157 while (in_full + in_part != count) { 161 while (in_full + in_part != count) {
158 if (noerror) { 162 if (noerror) {
159 /* Pre-zero the buffer when doing the noerror thing */ 163 /* Pre-zero the buffer when doing the noerror thing */
160 memset(buf, '\0', bs); 164 memset(ibuf, '\0', ibs);
165 }
166
167 n = safe_read(ifd, ibuf, ibs);
168 if (n == 0) {
169 break;
161 } 170 }
162 n = safe_read(ifd, buf, bs);
163 if (n < 0) { 171 if (n < 0) {
164 if (noerror) { 172 if (noerror) {
165 n = bs; 173 n = ibs;
166 bb_perror_msg("%s", infile); 174 bb_perror_msg("%s", infile);
167 } else { 175 } else {
168 bb_perror_msg_and_die("%s", infile); 176 bb_perror_msg_and_die("%s", infile);
169 } 177 }
170 } 178 }
171 if (n == 0) { 179 if ((size_t)n == ibs) {
172 break;
173 }
174 if ((size_t)n == bs) {
175 in_full++; 180 in_full++;
176 } else { 181 } else {
177 in_part++; 182 in_part++;
183 if (sync_flag) {
184 memset(ibuf + n, '\0', ibs - n);
185 n = ibs;
186 }
178 } 187 }
179 if (sync_flag) { 188 if (twobufs_flag) {
180 memset(buf + n, '\0', bs - n); 189 char *tmp = ibuf;
181 n = bs; 190 while (n) {
191 size_t d = obs - oc;
192
193 if (d > n) d = n;
194 memcpy(obuf + oc, tmp, d);
195 n -= d;
196 tmp += d;
197 oc += d;
198 if (oc == obs) {
199 if (bb_full_write(ofd, obuf, obs) < 0) {
200 bb_perror_msg_and_die("%s", outfile);
201 }
202 out_full++;
203 oc = 0;
204 }
205 }
206 } else {
207 if ((n = bb_full_write(ofd, ibuf, n)) < 0) {
208 bb_perror_msg_and_die("%s", outfile);
209 }
210 if (n == ibs) out_full++;
211 else out_part++;
182 } 212 }
183 n = bb_full_write(ofd, buf, n); 213 }
184 if (n < 0) { 214
215 if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
216 if (bb_full_write(ofd, obuf, oc) < 0) {
185 bb_perror_msg_and_die("%s", outfile); 217 bb_perror_msg_and_die("%s", outfile);
186 } 218 }
187 if ((size_t)n == bs) { 219 out_part++;
188 out_full++;
189 } else {
190 out_part++;
191 }
192 } 220 }
193
194 if (close (ifd) < 0) { 221 if (close (ifd) < 0) {
195 bb_perror_msg_and_die("%s", infile); 222 bb_perror_msg_and_die("%s", infile);
196 } 223 }
diff --git a/include/usage.h b/include/usage.h
index 0e3ecae05..9ec25c49f 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -370,19 +370,23 @@ USE_FEATURE_DATE_ISOFMT( \
370 "64\n" 370 "64\n"
371 371
372#define dd_trivial_usage \ 372#define dd_trivial_usage \
373 "[if=FILE] [of=FILE] [bs=N] [count=N] [skip=N]\n" \ 373 "[if=FILE] [of=FILE] " USE_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n" \
374 "\t [seek=N] [conv=notrunc|noerror|sync]" 374 "\t [seek=N]" USE_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync]")
375#define dd_full_usage \ 375#define dd_full_usage \
376 "Copy a file, converting and formatting according to options\n\n" \ 376 "Copy a file, converting and formatting according to options\n\n" \
377 "\tif=FILE\t\tread from FILE instead of stdin\n" \ 377 "\tif=FILE\t\tread from FILE instead of stdin\n" \
378 "\tof=FILE\t\twrite to FILE instead of stdout\n" \ 378 "\tof=FILE\t\twrite to FILE instead of stdout\n" \
379 "\tbs=N\t\tread and write N bytes at a time\n" \ 379 "\tbs=N\t\tread and write N bytes at a time\n" \
380 USE_FEATURE_DD_IBS_OBS("\tibs=N\t\tread N bytes at a time\n") \
381 USE_FEATURE_DD_IBS_OBS("\tobs=N\t\twrite N bytes at a time\n") \
380 "\tcount=N\t\tcopy only N input blocks\n" \ 382 "\tcount=N\t\tcopy only N input blocks\n" \
381 "\tskip=N\t\tskip N input blocks\n" \ 383 "\tskip=N\t\tskip N input blocks\n" \
382 "\tseek=N\t\tskip N output blocks\n" \ 384 "\tseek=N\t\tskip N output blocks\n" \
383 "\tconv=notrunc\tdon't truncate output file\n" \ 385 USE_FEATURE_DD_IBS_OBS( \
384 "\tconv=noerror\tcontinue after read errors\n" \ 386 "\tconv=notrunc\tdon't truncate output file\n" \
385 "\tconv=sync\tpad blocks with zeros\n" \ 387 "\tconv=noerror\tcontinue after read errors\n" \
388 "\tconv=sync\tpad blocks with zeros\n" \
389 ) \
386 "\n" \ 390 "\n" \
387 "Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \ 391 "Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \
388 "MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)" 392 "MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)"
diff --git a/patches/dd_ibs_and_obs.diff b/patches/dd_ibs_and_obs.diff
deleted file mode 100644
index 3bbf4b989..000000000
--- a/patches/dd_ibs_and_obs.diff
+++ /dev/null
@@ -1,252 +0,0 @@
1This patch adds support of ibs= and obs= to dd.
2----
3Hideki IWAMOTO h-iwamoto@kit.hi-ho.ne.jp
4
5
6--- a/include/usage.h 29 Mar 2004 08:20:08 -0000 1.198
7+++ b/include/usage.h 4 Apr 2004 07:15:21 -0000
8@@ -309,13 +309,15 @@
9 "64\n"
10
11 #define dd_trivial_usage \
12- "[if=FILE] [of=FILE] [bs=N] [count=N] [skip=N]\n" \
13- "\t [seek=N] [conv=notrunc|noerror|sync]"
14+ "[if=FILE] [of=FILE] [ibs=N] [obs=N] [bs=N] [count=N]\n" \
15+ "\t [skip=N] [seek=N] [conv=notrunc|noerror|sync]"
16 #define dd_full_usage \
17 "Copy a file, converting and formatting according to options\n\n" \
18 "\tif=FILE\t\tread from FILE instead of stdin\n" \
19 "\tof=FILE\t\twrite to FILE instead of stdout\n" \
20- "\tbs=N\t\tread and write N bytes at a time\n" \
21+ "\tibs=N\t\tread N bytes at a time\n" \
22+ "\tobs=N\t\twrite N bytes at a time\n" \
23+ "\tbs=N\t\tforce ibs=N and obs=N\n" \
24 "\tcount=N\t\tcopy only N input blocks\n" \
25 "\tskip=N\t\tskip N input blocks\n" \
26 "\tseek=N\t\tskip N output blocks\n" \
27@@ -323,6 +325,8 @@
28 "\tconv=noerror\tcontinue after read errors\n" \
29 "\tconv=sync\tpad blocks with zeros\n" \
30 "\n" \
31+ "If the bs= expr operand is not specified, the input is processed and collected\n" \
32+ "into full-sized output blocks until the end of the input is reached.\n" \
33 "Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n" \
34 "MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)."
35 #define dd_example_usage \
36--- a/coreutils/dd.c 30 Jan 2004 22:24:32 -0000 1.55
37+++ b/coreutils/dd.c 4 Apr 2004 07:15:21 -0000
38@@ -30,6 +30,10 @@
39 #include <fcntl.h>
40 #include "busybox.h"
41
42+#define C_NOERROR 0x0001
43+#define C_TRUNC 0x0002
44+#define C_SYNC 0x0004
45+#define C_TWOBUFS 0x0008
46
47 static const struct suffix_mult dd_suffixes[] = {
48 { "c", 1 },
49@@ -51,13 +55,13 @@
50 size_t in_full = 0;
51 size_t in_part = 0;
52 size_t count = -1;
53- size_t bs = 512;
54+ size_t ibs = 512;
55+ size_t obs = 512;
56+ size_t oc = 0;
57 ssize_t n;
58 off_t seek = 0;
59 off_t skip = 0;
60- int sync_flag = FALSE;
61- int noerror = FALSE;
62- int trunc_flag = TRUE;
63+ unsigned int dd_flags = C_TWOBUFS | C_TRUNC;
64 int oflag;
65 int ifd;
66 int ofd;
67@@ -65,11 +69,18 @@
68 const char *infile = NULL;
69 const char *outfile = NULL;
70 char *buf;
71+ char *ibuf;
72+ char *obuf;
73
74 for (i = 1; i < argc; i++) {
75- if (strncmp("bs=", argv[i], 3) == 0)
76- bs = bb_xparse_number(argv[i]+3, dd_suffixes);
77- else if (strncmp("count=", argv[i], 6) == 0)
78+ if (strncmp("ibs=", argv[i], 4) == 0)
79+ ibs = bb_xparse_number(argv[i]+4, dd_suffixes);
80+ else if (strncmp("obs=", argv[i], 4) == 0)
81+ obs = bb_xparse_number(argv[i]+4, dd_suffixes);
82+ else if (strncmp("bs=", argv[i], 3) == 0) {
83+ ibs = obs = bb_xparse_number(argv[i]+3, dd_suffixes);
84+ dd_flags &= ~C_TWOBUFS;
85+ } else if (strncmp("count=", argv[i], 6) == 0)
86 count = bb_xparse_number(argv[i]+6, dd_suffixes);
87 else if (strncmp("seek=", argv[i], 5) == 0)
88 seek = bb_xparse_number(argv[i]+5, dd_suffixes);
89@@ -83,13 +94,13 @@
90 buf = argv[i]+5;
91 while (1) {
92 if (strncmp("notrunc", buf, 7) == 0) {
93- trunc_flag = FALSE;
94+ dd_flags &= ~C_TRUNC;
95 buf += 7;
96 } else if (strncmp("sync", buf, 4) == 0) {
97- sync_flag = TRUE;
98+ dd_flags |= C_SYNC;
99 buf += 4;
100 } else if (strncmp("noerror", buf, 7) == 0) {
101- noerror = TRUE;
102+ dd_flags |= C_NOERROR;
103 buf += 7;
104 } else {
105 bb_error_msg_and_die("invalid conversion `%s'", argv[i]+5);
106@@ -103,7 +114,12 @@
107 bb_show_usage();
108 }
109
110- buf = xmalloc(bs);
111+ ibuf = xmalloc(ibs);
112+
113+ if (dd_flags & C_TWOBUFS)
114+ obuf = xmalloc(obs);
115+ else
116+ obuf = ibuf;
117
118 if (infile != NULL) {
119 ifd = bb_xopen(infile, O_RDONLY);
120@@ -115,7 +131,7 @@
121 if (outfile != NULL) {
122 oflag = O_WRONLY | O_CREAT;
123
124- if (!seek && trunc_flag) {
125+ if (!seek && (dd_flags & C_TRUNC)) {
126 oflag |= O_TRUNC;
127 }
128
129@@ -123,8 +139,8 @@
130 bb_perror_msg_and_die("%s", outfile);
131 }
132
133- if (seek && trunc_flag) {
134- if (ftruncate(ofd, seek * bs) < 0) {
135+ if (seek && (dd_flags & C_TRUNC)) {
136+ if (ftruncate(ofd, seek * obs) < 0) {
137 struct stat st;
138
139 if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
140@@ -139,52 +155,88 @@
141 }
142
143 if (skip) {
144- if (lseek(ifd, skip * bs, SEEK_CUR) < 0) {
145- bb_perror_msg_and_die("%s", infile);
146+ if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
147+ while (skip-- > 0) {
148+ n = safe_read(ifd, ibuf, ibs);
149+ if (n < 0)
150+ bb_perror_msg_and_die("%s", infile);
151+ if (n == 0)
152+ break;
153+ }
154 }
155 }
156
157 if (seek) {
158- if (lseek(ofd, seek * bs, SEEK_CUR) < 0) {
159+ if (lseek(ofd, seek * obs, SEEK_CUR) < 0) {
160 bb_perror_msg_and_die("%s", outfile);
161 }
162 }
163
164 while (in_full + in_part != count) {
165- if (noerror) {
166+ if (dd_flags & C_NOERROR) {
167 /* Pre-zero the buffer when doing the noerror thing */
168- memset(buf, '\0', bs);
169+ memset(ibuf, '\0', ibs);
170+ }
171+
172+ n = safe_read(ifd, ibuf, ibs);
173+ if (n == 0) {
174+ break;
175 }
176- n = safe_read(ifd, buf, bs);
177 if (n < 0) {
178- if (noerror) {
179- n = bs;
180+ if (dd_flags & C_NOERROR) {
181+ n = ibs;
182 bb_perror_msg("%s", infile);
183 } else {
184 bb_perror_msg_and_die("%s", infile);
185 }
186 }
187- if (n == 0) {
188- break;
189- }
190- if (n == bs) {
191+ if (n == ibs) {
192 in_full++;
193 } else {
194 in_part++;
195+ if (dd_flags & C_SYNC) {
196+ memset(ibuf + n, '\0', ibs - n);
197+ n = ibs;
198+ }
199 }
200- if (sync_flag) {
201- memset(buf + n, '\0', bs - n);
202- n = bs;
203+
204+ if (dd_flags & C_TWOBUFS) {
205+ size_t d;
206+ char *tmp = ibuf;
207+
208+ while (n) {
209+ d = obs - oc;
210+ if (d > n)
211+ d = n;
212+ memcpy(obuf + oc, tmp, d);
213+ n -= d;
214+ tmp += d;
215+ oc += d;
216+ if (oc == obs) {
217+ if (bb_full_write(ofd, obuf, obs) < 0) {
218+ bb_perror_msg_and_die("%s", outfile);
219+ }
220+ out_full++;
221+ oc = 0;
222+ }
223+ }
224+ } else {
225+ if (bb_full_write(ofd, ibuf, n) < 0) {
226+ bb_perror_msg_and_die("%s", outfile);
227+ }
228+ if (n == ibs) {
229+ out_full++;
230+ } else {
231+ out_part++;
232+ }
233 }
234- n = bb_full_write(ofd, buf, n);
235- if (n < 0) {
236+ }
237+
238+ if (oc) {
239+ if (bb_full_write(ofd, obuf, oc) < 0) {
240 bb_perror_msg_and_die("%s", outfile);
241 }
242- if (n == bs) {
243- out_full++;
244- } else {
245- out_part++;
246- }
247+ out_part++;
248 }
249
250 if (close (ifd) < 0) {
251
252
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