diff options
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/Config.src | 38 | ||||
| -rw-r--r-- | coreutils/dd.c | 143 |
2 files changed, 111 insertions, 70 deletions
diff --git a/coreutils/Config.src b/coreutils/Config.src index 68c717883..1bbb91ee9 100644 --- a/coreutils/Config.src +++ b/coreutils/Config.src @@ -87,44 +87,6 @@ config CUT cut is used to print selected parts of lines from each file to stdout. -config DD - bool "dd" - default y - help - dd copies a file (from standard input to standard output, - by default) using specific input and output blocksizes, - while optionally performing conversions on it. - -config FEATURE_DD_SIGNAL_HANDLING - bool "Enable DD signal handling for status reporting" - default y - depends on DD - help - Sending a SIGUSR1 signal to a running `dd' process makes it - print to standard error the number of records read and written - so far, then to resume copying. - - $ dd if=/dev/zero of=/dev/null& - $ pid=$! kill -USR1 $pid; sleep 1; kill $pid - 10899206+0 records in - 10899206+0 records out - -config FEATURE_DD_THIRD_STATUS_LINE - bool "Enable the third status line upon signal" - default y - depends on DD && FEATURE_DD_SIGNAL_HANDLING - help - Displays a coreutils-like third status line with transferred bytes, - elapsed time and speed. - -config FEATURE_DD_IBS_OBS - bool "Enable ibs, obs and conv options" - default y - depends on DD - help - Enables support for writing a certain number of bytes in and out, - at a time, and performing conversions on the data stream. - config DF bool "df" default y diff --git a/coreutils/dd.c b/coreutils/dd.c index 2838f6341..302497074 100644 --- a/coreutils/dd.c +++ b/coreutils/dd.c @@ -8,6 +8,51 @@ * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//config:config DD +//config: bool "dd" +//config: default y +//config: help +//config: dd copies a file (from standard input to standard output, +//config: by default) using specific input and output blocksizes, +//config: while optionally performing conversions on it. +//config: +//config:config FEATURE_DD_SIGNAL_HANDLING +//config: bool "Enable signal handling for status reporting" +//config: default y +//config: depends on DD +//config: help +//config: Sending a SIGUSR1 signal to a running `dd' process makes it +//config: print to standard error the number of records read and written +//config: so far, then to resume copying. +//config: +//config: $ dd if=/dev/zero of=/dev/null & +//config: $ pid=$!; kill -USR1 $pid; sleep 1; kill $pid +//config: 10899206+0 records in +//config: 10899206+0 records out +//config: +//config:config FEATURE_DD_THIRD_STATUS_LINE +//config: bool "Enable the third status line upon signal" +//config: default y +//config: depends on DD && FEATURE_DD_SIGNAL_HANDLING +//config: help +//config: Displays a coreutils-like third status line with transferred bytes, +//config: elapsed time and speed. +//config: +//config:config FEATURE_DD_IBS_OBS +//config: bool "Enable ibs, obs and conv options" +//config: default y +//config: depends on DD +//config: help +//config: Enables support for writing a certain number of bytes in and out, +//config: at a time, and performing conversions on the data stream. +//config: +//config:config FEATURE_DD_STATUS +//config: bool "Enable status display options" +//config: default y +//config: depends on DD +//config: help +//config: Enables support for status=noxfer/none option. + //usage:#define dd_trivial_usage //usage: "[if=FILE] [of=FILE] " IF_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n" //usage: " [seek=N]" IF_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync|fsync]") @@ -32,8 +77,12 @@ //usage: "\n conv=fsync Physically write data out before finishing" //usage: "\n conv=swab Swap every pair of bytes" //usage: ) +//usage: IF_FEATURE_DD_STATUS( +//usage: "\n status=noxfer Suppress rate output" +//usage: "\n status=none Suppress all output" +//usage: ) //usage: "\n" -//usage: "\nN may be suffixed by c (1), w (2), b (512), kD (1000), k (1024), MD, M, GD, G" +//usage: "\nN may be suffixed by c (1), w (2), b (512), kB (1000), k (1024), MB, M, GB, G" //usage: //usage:#define dd_example_usage //usage: "$ dd if=/dev/zero of=/dev/ram1 bs=1M count=4\n" @@ -54,13 +103,18 @@ static const struct suffix_mult dd_suffixes[] = { { "c", 1 }, { "w", 2 }, { "b", 512 }, + { "kB", 1000 }, { "kD", 1000 }, { "k", 1024 }, - { "K", 1024 }, /* compat with coreutils dd */ + { "K", 1024 }, /* compat with coreutils dd (it also accepts KB and KD, TODO?) */ + { "MB", 1000000 }, { "MD", 1000000 }, - { "M", 1048576 }, + { "M", 1024*1024 }, + { "GB", 1000000000 }, { "GD", 1000000000 }, - { "G", 1073741824 }, + { "G", 1024*1024*1024 }, + /* "D" suffix for decimal is not in coreutils manpage, looks like it's deprecated */ + /* coreutils also understands TPEZY suffixes for tera- and so on, with B suffix for decimal */ { "", 0 } }; @@ -70,6 +124,7 @@ struct globals { unsigned long long total_bytes; unsigned long long begin_time_us; #endif + int flags; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define INIT_G() do { \ @@ -77,6 +132,21 @@ struct globals { memset(&G, 0, sizeof(G)); \ } while (0) +enum { + /* Must be in the same order as OP_conv_XXX! */ + /* (see "flags |= (1 << what)" below) */ + FLAG_NOTRUNC = (1 << 0) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_SYNC = (1 << 1) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_NOERROR = (1 << 2) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_FSYNC = (1 << 3) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_SWAB = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS, + /* end of conv flags */ + FLAG_TWOBUFS = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_COUNT = 1 << 6, + FLAG_STATUS = 1 << 7, + FLAG_STATUS_NONE = 1 << 7, + FLAG_STATUS_NOXFER = 1 << 8, +}; static void dd_output_status(int UNUSED_PARAM cur_signal) { @@ -93,6 +163,13 @@ static void dd_output_status(int UNUSED_PARAM cur_signal) G.out_full, G.out_part); #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE +# if ENABLE_FEATURE_DD_STATUS + if (G.flags & FLAG_STATUS_NOXFER) /* status=noxfer active? */ + return; + //TODO: should status=none make dd stop reacting to USR1 entirely? + //So far we react to it (we print the stats), + //status=none only suppresses final, non-USR1 generated status message. +# endif fprintf(stderr, "%llu bytes (%sB) copied, ", G.total_bytes, /* show fractional digit, use suffixes */ @@ -148,20 +225,8 @@ static bool write_and_stats(const void *buf, size_t len, size_t obs, int dd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int dd_main(int argc UNUSED_PARAM, char **argv) { - enum { - /* Must be in the same order as OP_conv_XXX! */ - /* (see "flags |= (1 << what)" below) */ - FLAG_NOTRUNC = (1 << 0) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_SYNC = (1 << 1) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_NOERROR = (1 << 2) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_FSYNC = (1 << 3) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_SWAB = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS, - /* end of conv flags */ - FLAG_TWOBUFS = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_COUNT = 1 << 6, - }; static const char keywords[] ALIGN1 = - "bs\0""count\0""seek\0""skip\0""if\0""of\0" + "bs\0""count\0""seek\0""skip\0""if\0""of\0"IF_FEATURE_DD_STATUS("status\0") #if ENABLE_FEATURE_DD_IBS_OBS "ibs\0""obs\0""conv\0" #endif @@ -170,6 +235,10 @@ int dd_main(int argc UNUSED_PARAM, char **argv) static const char conv_words[] ALIGN1 = "notrunc\0""sync\0""noerror\0""fsync\0""swab\0"; #endif +#if ENABLE_FEATURE_DD_STATUS + static const char status_words[] ALIGN1 = + "none\0""noxfer\0"; +#endif enum { OP_bs = 0, OP_count, @@ -177,6 +246,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) OP_skip, OP_if, OP_of, + IF_FEATURE_DD_STATUS(OP_status,) #if ENABLE_FEATURE_DD_IBS_OBS OP_ibs, OP_obs, @@ -215,14 +285,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv) #endif /* These are all zeroed at once! */ struct { - int flags; size_t oc; ssize_t prev_read_size; /* for detecting swab failure */ off_t count; off_t seek, skip; const char *infile, *outfile; } Z; -#define flags (Z.flags ) #define oc (Z.oc ) #define prev_read_size (Z.prev_read_size) #define count (Z.count ) @@ -278,7 +346,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) n = index_in_strings(conv_words, val); if (n < 0) bb_error_msg_and_die(bb_msg_invalid_arg, val, "conv"); - flags |= (1 << n); + G.flags |= (1 << n); if (!arg) /* no ',' left, so this was the last specifier */ break; /* *arg = ','; - to preserve ps listing? */ @@ -294,7 +362,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) } /* These can be large: */ if (what == OP_count) { - flags |= FLAG_COUNT; + G.flags |= FLAG_COUNT; count = XATOU_SFX(val, dd_suffixes); /*continue;*/ } @@ -314,6 +382,16 @@ int dd_main(int argc UNUSED_PARAM, char **argv) outfile = val; /*continue;*/ } +#if ENABLE_FEATURE_DD_STATUS + if (what == OP_status) { + int n; + n = index_in_strings(status_words, val); + if (n < 0) + bb_error_msg_and_die(bb_msg_invalid_arg, val, "status"); + G.flags |= FLAG_STATUS << n; + /*continue;*/ + } +#endif } /* end of "for (argv[i])" */ //XXX:FIXME for huge ibs or obs, malloc'ing them isn't the brightest idea ever @@ -321,7 +399,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) obuf = ibuf; #if ENABLE_FEATURE_DD_IBS_OBS if (ibs != obs) { - flags |= FLAG_TWOBUFS; + G.flags |= FLAG_TWOBUFS; obuf = xmalloc(obs); } #endif @@ -341,12 +419,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv) if (outfile) { int oflag = O_WRONLY | O_CREAT; - if (!seek && !(flags & FLAG_NOTRUNC)) + if (!seek && !(G.flags & FLAG_NOTRUNC)) oflag |= O_TRUNC; xmove_fd(xopen(outfile, oflag), ofd); - if (seek && !(flags & FLAG_NOTRUNC)) { + if (seek && !(G.flags & FLAG_NOTRUNC)) { if (ftruncate(ofd, seek * obs) < 0) { struct stat st; @@ -377,7 +455,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) goto die_outfile; } - while (!(flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) { + while (!(G.flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) { ssize_t n; n = safe_read(ifd, ibuf, ibs); @@ -385,7 +463,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) break; if (n < 0) { /* "Bad block" */ - if (!(flags & FLAG_NOERROR)) + if (!(G.flags & FLAG_NOERROR)) goto die_infile; bb_simple_perror_msg(infile); /* GNU dd with conv=noerror skips over bad blocks */ @@ -394,7 +472,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) * conv=noerror just ignores input bad blocks */ n = 0; } - if (flags & FLAG_SWAB) { + if (G.flags & FLAG_SWAB) { uint16_t *p16; ssize_t n2; @@ -419,12 +497,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv) G.in_full++; else { G.in_part++; - if (flags & FLAG_SYNC) { + if (G.flags & FLAG_SYNC) { memset(ibuf + n, 0, ibs - n); n = ibs; } } - if (flags & FLAG_TWOBUFS) { + if (G.flags & FLAG_TWOBUFS) { char *tmp = ibuf; while (n) { size_t d = obs - oc; @@ -446,7 +524,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) goto out_status; } - if (flags & FLAG_FSYNC) { + if (G.flags & FLAG_FSYNC) { if (fsync(ofd) < 0) goto die_outfile; } @@ -468,11 +546,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv) exitcode = EXIT_SUCCESS; out_status: - dd_output_status(0); + if (!ENABLE_FEATURE_DD_STATUS || !(G.flags & FLAG_STATUS_NONE)) + dd_output_status(0); if (ENABLE_FEATURE_CLEAN_UP) { free(obuf); - if (flags & FLAG_TWOBUFS) + if (G.flags & FLAG_TWOBUFS) free(ibuf); } |