diff options
| -rw-r--r-- | coreutils/dd.c | 33 | ||||
| -rw-r--r-- | docs/posix_conformance.txt | 5 |
2 files changed, 26 insertions, 12 deletions
diff --git a/coreutils/dd.c b/coreutils/dd.c index 38b2a6aa1..0f130bcad 100644 --- a/coreutils/dd.c +++ b/coreutils/dd.c @@ -37,7 +37,7 @@ //config: elapsed time and speed. //config: //config:config FEATURE_DD_IBS_OBS -//config: bool "Enable ibs, obs and conv options" +//config: bool "Enable ibs, obs, iflag and conv options" //config: default y //config: depends on DD //config: help @@ -57,7 +57,7 @@ //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] [iflag=skip_bytes]") +//usage: " [seek=N]" IF_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync|fsync] [iflag=skip_bytes|fullblock]") //usage:#define dd_full_usage "\n\n" //usage: "Copy a file with converting and formatting\n" //usage: "\n if=FILE Read from FILE instead of stdin" @@ -79,6 +79,7 @@ //usage: "\n conv=fsync Physically write data out before finishing" //usage: "\n conv=swab Swap every pair of bytes" //usage: "\n iflag=skip_bytes skip=N is in bytes" +//usage: "\n iflag=fullblock Read full blocks" //usage: ) //usage: IF_FEATURE_DD_STATUS( //usage: "\n status=noxfer Suppress rate output" @@ -130,11 +131,12 @@ enum { /* start of input flags */ FLAG_IFLAG_SHIFT = 5, FLAG_SKIP_BYTES = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_FULLBLOCK = (1 << 6) * ENABLE_FEATURE_DD_IBS_OBS, /* end of input flags */ - FLAG_TWOBUFS = (1 << 6) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_COUNT = 1 << 7, - FLAG_STATUS_NONE = 1 << 8, - FLAG_STATUS_NOXFER = 1 << 9, + FLAG_TWOBUFS = (1 << 7) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_COUNT = 1 << 8, + FLAG_STATUS_NONE = 1 << 9, + FLAG_STATUS_NOXFER = 1 << 10, }; static void dd_output_status(int UNUSED_PARAM cur_signal) @@ -255,7 +257,7 @@ 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"; static const char iflag_words[] ALIGN1 = - "skip_bytes\0"; + "skip_bytes\0""fullblock\0"; #endif #if ENABLE_FEATURE_DD_STATUS static const char status_words[] ALIGN1 = @@ -294,6 +296,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) /* Partially implemented: */ //swab swap every pair of input bytes: will abort on non-even reads OP_iflag_skip_bytes, + OP_iflag_fullblock, #endif }; smallint exitcode = EXIT_FAILURE; @@ -454,7 +457,13 @@ int dd_main(int argc UNUSED_PARAM, char **argv) size_t blocksz = (G.flags & FLAG_SKIP_BYTES) ? 1 : ibs; if (lseek(ifd, skip * blocksz, SEEK_CUR) < 0) { do { - ssize_t n = safe_read(ifd, ibuf, blocksz); + ssize_t n; +#if ENABLE_FEATURE_DD_IBS_OBS + if (G.flags & FLAG_FULLBLOCK) + n = full_read(ifd, ibuf, blocksz); + else +#endif + n = safe_read(ifd, ibuf, blocksz); if (n < 0) goto die_infile; if (n == 0) @@ -469,8 +478,12 @@ int dd_main(int argc UNUSED_PARAM, char **argv) while (!(G.flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) { ssize_t n; - - n = safe_read(ifd, ibuf, ibs); +#if ENABLE_FEATURE_DD_IBS_OBS + if (G.flags & FLAG_FULLBLOCK) + n = full_read(ifd, ibuf, ibs); + else +#endif + n = safe_read(ifd, ibuf, ibs); if (n == 0) break; if (n < 0) { diff --git a/docs/posix_conformance.txt b/docs/posix_conformance.txt index 8b9112020..cdf89b744 100644 --- a/docs/posix_conformance.txt +++ b/docs/posix_conformance.txt @@ -178,9 +178,10 @@ dd POSIX options: conv=noerror | yes | | conv=notrunc | yes | | conv=sync | yes | | +dd compatibility options: + conv=fsync | yes | | iflag=skip_bytes| yes | | -dd Busybox specific options: - conv=fsync + iflag=fullblock | yes | | df POSIX options option | exists | compliant | remarks |