dd: add optional support for status=noxfer/none
While at it, added 'B' number suffixes, upstream compat function old new delta dd_main 1469 1543 +74 dd_suffixes 88 112 +24 packed_usage 30156 30176 +20 dd_output_status 372 388 +16 static.status_words - 13 +13 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 4/0 up/down: 147/0) Total: 147 bytes Signed-off-by: Ari Sundholm <ari@tuxera.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ari Sundholm
Denys Vlasenko
parent
7e66102f76
commit
f22a838aed
@ -87,44 +87,6 @@ config CUT
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cut is used to print selected parts of lines from
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each file to stdout.
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config DD
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bool "dd"
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default y
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help
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dd copies a file (from standard input to standard output,
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by default) using specific input and output blocksizes,
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while optionally performing conversions on it.
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config FEATURE_DD_SIGNAL_HANDLING
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bool "Enable DD signal handling for status reporting"
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default y
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depends on DD
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help
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Sending a SIGUSR1 signal to a running `dd' process makes it
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print to standard error the number of records read and written
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so far, then to resume copying.
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$ dd if=/dev/zero of=/dev/null&
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$ pid=$! kill -USR1 $pid; sleep 1; kill $pid
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10899206+0 records in
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10899206+0 records out
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config FEATURE_DD_THIRD_STATUS_LINE
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bool "Enable the third status line upon signal"
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default y
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depends on DD && FEATURE_DD_SIGNAL_HANDLING
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help
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Displays a coreutils-like third status line with transferred bytes,
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elapsed time and speed.
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config FEATURE_DD_IBS_OBS
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bool "Enable ibs, obs and conv options"
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default y
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depends on DD
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help
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Enables support for writing a certain number of bytes in and out,
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at a time, and performing conversions on the data stream.
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config DF
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bool "df"
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default y
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141
coreutils/dd.c
141
coreutils/dd.c
@ -8,6 +8,51 @@
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config DD
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//config: bool "dd"
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//config: default y
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//config: help
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//config: dd copies a file (from standard input to standard output,
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//config: by default) using specific input and output blocksizes,
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//config: while optionally performing conversions on it.
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//config:
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//config:config FEATURE_DD_SIGNAL_HANDLING
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//config: bool "Enable signal handling for status reporting"
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//config: default y
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//config: depends on DD
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//config: help
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//config: Sending a SIGUSR1 signal to a running `dd' process makes it
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//config: print to standard error the number of records read and written
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//config: so far, then to resume copying.
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//config:
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//config: $ dd if=/dev/zero of=/dev/null &
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//config: $ pid=$!; kill -USR1 $pid; sleep 1; kill $pid
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//config: 10899206+0 records in
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//config: 10899206+0 records out
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//config:
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//config:config FEATURE_DD_THIRD_STATUS_LINE
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//config: bool "Enable the third status line upon signal"
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//config: default y
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//config: depends on DD && FEATURE_DD_SIGNAL_HANDLING
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//config: help
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//config: Displays a coreutils-like third status line with transferred bytes,
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//config: elapsed time and speed.
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//config:
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//config:config FEATURE_DD_IBS_OBS
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//config: bool "Enable ibs, obs and conv options"
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//config: default y
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//config: depends on DD
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//config: help
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//config: Enables support for writing a certain number of bytes in and out,
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//config: at a time, and performing conversions on the data stream.
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//config:
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//config:config FEATURE_DD_STATUS
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//config: bool "Enable status display options"
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//config: default y
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//config: depends on DD
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//config: help
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//config: Enables support for status=noxfer/none option.
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//usage:#define dd_trivial_usage
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//usage: "[if=FILE] [of=FILE] " IF_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n"
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//usage: " [seek=N]" IF_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync|fsync]")
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@ -32,8 +77,12 @@
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//usage: "\n conv=fsync Physically write data out before finishing"
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//usage: "\n conv=swab Swap every pair of bytes"
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//usage: )
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//usage: IF_FEATURE_DD_STATUS(
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//usage: "\n status=noxfer Suppress rate output"
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//usage: "\n status=none Suppress all output"
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//usage: )
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//usage: "\n"
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//usage: "\nN may be suffixed by c (1), w (2), b (512), kD (1000), k (1024), MD, M, GD, G"
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//usage: "\nN may be suffixed by c (1), w (2), b (512), kB (1000), k (1024), MB, M, GB, G"
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//usage:
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//usage:#define dd_example_usage
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//usage: "$ dd if=/dev/zero of=/dev/ram1 bs=1M count=4\n"
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@ -54,13 +103,18 @@ static const struct suffix_mult dd_suffixes[] = {
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{ "c", 1 },
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{ "w", 2 },
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{ "b", 512 },
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{ "kB", 1000 },
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{ "kD", 1000 },
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{ "k", 1024 },
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{ "K", 1024 }, /* compat with coreutils dd */
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{ "K", 1024 }, /* compat with coreutils dd (it also accepts KB and KD, TODO?) */
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{ "MB", 1000000 },
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{ "MD", 1000000 },
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{ "M", 1048576 },
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{ "M", 1024*1024 },
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{ "GB", 1000000000 },
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{ "GD", 1000000000 },
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{ "G", 1073741824 },
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{ "G", 1024*1024*1024 },
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/* "D" suffix for decimal is not in coreutils manpage, looks like it's deprecated */
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/* coreutils also understands TPEZY suffixes for tera- and so on, with B suffix for decimal */
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{ "", 0 }
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};
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@ -70,6 +124,7 @@ struct globals {
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unsigned long long total_bytes;
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unsigned long long begin_time_us;
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#endif
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int flags;
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} FIX_ALIASING;
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define INIT_G() do { \
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@ -77,6 +132,21 @@ struct globals {
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memset(&G, 0, sizeof(G)); \
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} while (0)
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enum {
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/* Must be in the same order as OP_conv_XXX! */
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/* (see "flags |= (1 << what)" below) */
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FLAG_NOTRUNC = (1 << 0) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_SYNC = (1 << 1) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_NOERROR = (1 << 2) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_FSYNC = (1 << 3) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_SWAB = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS,
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/* end of conv flags */
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FLAG_TWOBUFS = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_COUNT = 1 << 6,
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FLAG_STATUS = 1 << 7,
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FLAG_STATUS_NONE = 1 << 7,
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FLAG_STATUS_NOXFER = 1 << 8,
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};
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static void dd_output_status(int UNUSED_PARAM cur_signal)
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{
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@ -93,6 +163,13 @@ static void dd_output_status(int UNUSED_PARAM cur_signal)
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G.out_full, G.out_part);
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#if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
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# if ENABLE_FEATURE_DD_STATUS
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if (G.flags & FLAG_STATUS_NOXFER) /* status=noxfer active? */
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return;
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//TODO: should status=none make dd stop reacting to USR1 entirely?
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//So far we react to it (we print the stats),
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//status=none only suppresses final, non-USR1 generated status message.
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# endif
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fprintf(stderr, "%llu bytes (%sB) copied, ",
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G.total_bytes,
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/* show fractional digit, use suffixes */
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@ -148,20 +225,8 @@ static bool write_and_stats(const void *buf, size_t len, size_t obs,
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int dd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int dd_main(int argc UNUSED_PARAM, char **argv)
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{
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enum {
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/* Must be in the same order as OP_conv_XXX! */
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/* (see "flags |= (1 << what)" below) */
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FLAG_NOTRUNC = (1 << 0) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_SYNC = (1 << 1) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_NOERROR = (1 << 2) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_FSYNC = (1 << 3) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_SWAB = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS,
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/* end of conv flags */
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FLAG_TWOBUFS = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS,
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FLAG_COUNT = 1 << 6,
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};
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static const char keywords[] ALIGN1 =
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"bs\0""count\0""seek\0""skip\0""if\0""of\0"
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"bs\0""count\0""seek\0""skip\0""if\0""of\0"IF_FEATURE_DD_STATUS("status\0")
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#if ENABLE_FEATURE_DD_IBS_OBS
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"ibs\0""obs\0""conv\0"
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#endif
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@ -169,6 +234,10 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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#if ENABLE_FEATURE_DD_IBS_OBS
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static const char conv_words[] ALIGN1 =
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"notrunc\0""sync\0""noerror\0""fsync\0""swab\0";
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#endif
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#if ENABLE_FEATURE_DD_STATUS
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static const char status_words[] ALIGN1 =
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"none\0""noxfer\0";
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#endif
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enum {
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OP_bs = 0,
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@ -177,6 +246,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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OP_skip,
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OP_if,
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OP_of,
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IF_FEATURE_DD_STATUS(OP_status,)
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#if ENABLE_FEATURE_DD_IBS_OBS
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OP_ibs,
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OP_obs,
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@ -215,14 +285,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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#endif
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/* These are all zeroed at once! */
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struct {
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int flags;
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size_t oc;
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ssize_t prev_read_size; /* for detecting swab failure */
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off_t count;
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off_t seek, skip;
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const char *infile, *outfile;
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} Z;
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#define flags (Z.flags )
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#define oc (Z.oc )
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#define prev_read_size (Z.prev_read_size)
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#define count (Z.count )
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@ -278,7 +346,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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n = index_in_strings(conv_words, val);
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if (n < 0)
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bb_error_msg_and_die(bb_msg_invalid_arg, val, "conv");
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flags |= (1 << n);
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G.flags |= (1 << n);
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if (!arg) /* no ',' left, so this was the last specifier */
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break;
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/* *arg = ','; - to preserve ps listing? */
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@ -294,7 +362,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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}
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/* These can be large: */
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if (what == OP_count) {
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flags |= FLAG_COUNT;
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G.flags |= FLAG_COUNT;
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count = XATOU_SFX(val, dd_suffixes);
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/*continue;*/
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}
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@ -314,6 +382,16 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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outfile = val;
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/*continue;*/
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}
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#if ENABLE_FEATURE_DD_STATUS
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if (what == OP_status) {
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int n;
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n = index_in_strings(status_words, val);
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if (n < 0)
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bb_error_msg_and_die(bb_msg_invalid_arg, val, "status");
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G.flags |= FLAG_STATUS << n;
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/*continue;*/
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}
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#endif
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} /* end of "for (argv[i])" */
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//XXX:FIXME for huge ibs or obs, malloc'ing them isn't the brightest idea ever
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@ -321,7 +399,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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obuf = ibuf;
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#if ENABLE_FEATURE_DD_IBS_OBS
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if (ibs != obs) {
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flags |= FLAG_TWOBUFS;
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G.flags |= FLAG_TWOBUFS;
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obuf = xmalloc(obs);
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}
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#endif
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@ -341,12 +419,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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if (outfile) {
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int oflag = O_WRONLY | O_CREAT;
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if (!seek && !(flags & FLAG_NOTRUNC))
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if (!seek && !(G.flags & FLAG_NOTRUNC))
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oflag |= O_TRUNC;
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xmove_fd(xopen(outfile, oflag), ofd);
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if (seek && !(flags & FLAG_NOTRUNC)) {
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if (seek && !(G.flags & FLAG_NOTRUNC)) {
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if (ftruncate(ofd, seek * obs) < 0) {
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struct stat st;
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@ -377,7 +455,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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goto die_outfile;
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}
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while (!(flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) {
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while (!(G.flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) {
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ssize_t n;
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n = safe_read(ifd, ibuf, ibs);
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@ -385,7 +463,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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break;
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if (n < 0) {
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/* "Bad block" */
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if (!(flags & FLAG_NOERROR))
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if (!(G.flags & FLAG_NOERROR))
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goto die_infile;
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bb_simple_perror_msg(infile);
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/* GNU dd with conv=noerror skips over bad blocks */
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@ -394,7 +472,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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* conv=noerror just ignores input bad blocks */
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n = 0;
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}
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if (flags & FLAG_SWAB) {
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if (G.flags & FLAG_SWAB) {
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uint16_t *p16;
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ssize_t n2;
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@ -419,12 +497,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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G.in_full++;
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else {
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G.in_part++;
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if (flags & FLAG_SYNC) {
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if (G.flags & FLAG_SYNC) {
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memset(ibuf + n, 0, ibs - n);
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n = ibs;
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}
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}
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if (flags & FLAG_TWOBUFS) {
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if (G.flags & FLAG_TWOBUFS) {
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char *tmp = ibuf;
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while (n) {
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size_t d = obs - oc;
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@ -446,7 +524,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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goto out_status;
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}
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if (flags & FLAG_FSYNC) {
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if (G.flags & FLAG_FSYNC) {
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if (fsync(ofd) < 0)
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goto die_outfile;
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}
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@ -468,11 +546,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv)
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exitcode = EXIT_SUCCESS;
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out_status:
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if (!ENABLE_FEATURE_DD_STATUS || !(G.flags & FLAG_STATUS_NONE))
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dd_output_status(0);
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if (ENABLE_FEATURE_CLEAN_UP) {
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free(obuf);
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if (flags & FLAG_TWOBUFS)
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if (G.flags & FLAG_TWOBUFS)
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free(ibuf);
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}
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