diff options
| -rw-r--r-- | package/utils/busybox/patches/001-dd-support-iflag-count_bytes.patch | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/package/utils/busybox/patches/001-dd-support-iflag-count_bytes.patch b/package/utils/busybox/patches/001-dd-support-iflag-count_bytes.patch new file mode 100644 index 0000000000..c195c10cf1 --- /dev/null +++ b/package/utils/busybox/patches/001-dd-support-iflag-count_bytes.patch @@ -0,0 +1,140 @@ +From 4eb46e1be6d88eaf077252ce93127ebf00aa8ef2 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Wed, 24 Mar 2021 16:01:42 +0100 +Subject: [PATCH] dd: support iflag=count_bytes +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +It allows passing amount of bytes in the count= + +function old new delta +packed_usage 33599 33617 +18 +static.iflag_words 29 41 +12 +dd_main 1601 1607 +6 +------------------------------------------------------------------------------ +(add/remove: 0/0 grow/shrink: 3/0 up/down: 36/0) Total: 36 bytes + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> +--- + coreutils/dd.c | 50 ++++++++++++++++++++++++------------- + testsuite/dd/dd-count-bytes | 1 + + 2 files changed, 33 insertions(+), 18 deletions(-) + create mode 100644 testsuite/dd/dd-count-bytes + +--- a/coreutils/dd.c ++++ b/coreutils/dd.c +@@ -59,7 +59,7 @@ + //usage: "[if=FILE] [of=FILE] [" IF_FEATURE_DD_IBS_OBS("ibs=N obs=N/") "bs=N] [count=N] [skip=N] [seek=N]\n" + //usage: IF_FEATURE_DD_IBS_OBS( + //usage: " [conv=notrunc|noerror|sync|fsync]\n" +-//usage: " [iflag=skip_bytes|fullblock|direct] [oflag=seek_bytes|append|direct]" ++//usage: " [iflag=skip_bytes|count_bytes|fullblock|direct] [oflag=seek_bytes|append|direct]" + //usage: ) + //usage:#define dd_full_usage "\n\n" + //usage: "Copy a file with converting and formatting\n" +@@ -82,6 +82,7 @@ + //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=count_bytes count=N is in bytes" + //usage: "\n oflag=seek_bytes seek=N is in bytes" + //usage: "\n iflag=direct O_DIRECT input" + //usage: "\n oflag=direct O_DIRECT output" +@@ -136,21 +137,22 @@ enum { + FLAG_SWAB = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS, + /* end of conv flags */ + /* 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, +- FLAG_IDIRECT = (1 << 7) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_IFLAG_SHIFT = 5, ++ FLAG_SKIP_BYTES = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_COUNT_BYTES = (1 << 6) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_FULLBLOCK = (1 << 7) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_IDIRECT = (1 << 8) * ENABLE_FEATURE_DD_IBS_OBS, + /* end of input flags */ + /* start of output flags */ +- FLAG_OFLAG_SHIFT = 8, +- FLAG_SEEK_BYTES = (1 << 8) * ENABLE_FEATURE_DD_IBS_OBS, +- FLAG_APPEND = (1 << 9) * ENABLE_FEATURE_DD_IBS_OBS, +- FLAG_ODIRECT = (1 << 10) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_OFLAG_SHIFT = 9, ++ FLAG_SEEK_BYTES = (1 << 9) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_APPEND = (1 << 10) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_ODIRECT = (1 << 11) * ENABLE_FEATURE_DD_IBS_OBS, + /* end of output flags */ +- FLAG_TWOBUFS = (1 << 11) * ENABLE_FEATURE_DD_IBS_OBS, +- FLAG_COUNT = 1 << 12, +- FLAG_STATUS_NONE = 1 << 13, +- FLAG_STATUS_NOXFER = 1 << 14, ++ FLAG_TWOBUFS = (1 << 12) * ENABLE_FEATURE_DD_IBS_OBS, ++ FLAG_COUNT = 1 << 13, ++ FLAG_STATUS_NONE = 1 << 14, ++ FLAG_STATUS_NOXFER = 1 << 15, + }; + + static void dd_output_status(int UNUSED_PARAM cur_signal) +@@ -175,8 +177,9 @@ static void dd_output_status(int UNUSED_ + //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, ++ fprintf(stderr, /*G.total_bytes < 1024 ++ ? "%llu bytes copied, " : */ "%llu bytes (%sB) copied, " ++ , G.total_bytes, + /* show fractional digit, use suffixes */ + make_human_readable_str(G.total_bytes, 1, 0) + ); +@@ -317,7 +320,7 @@ int dd_main(int argc UNUSED_PARAM, char + 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""fullblock\0""direct\0"; ++ "skip_bytes\0""count_bytes\0""fullblock\0""direct\0"; + static const char oflag_words[] ALIGN1 = + "seek_bytes\0append\0""direct\0"; + #endif +@@ -359,6 +362,7 @@ int dd_main(int argc UNUSED_PARAM, char + /* Partially implemented: */ + //swab swap every pair of input bytes: will abort on non-even reads + OP_iflag_skip_bytes, ++ OP_iflag_count_bytes, + OP_iflag_fullblock, + OP_iflag_direct, + OP_oflag_seek_bytes, +@@ -551,8 +555,17 @@ int dd_main(int argc UNUSED_PARAM, char + goto die_outfile; + } + +- while (!(G.flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) { +- ssize_t n = dd_read(ibuf, ibs); ++ while (1) { ++ ssize_t n = ibs; ++ ++ if (G.flags & FLAG_COUNT) { ++ if (count == 0) ++ break; ++ if ((G.flags & FLAG_COUNT_BYTES) && count < ibs) ++ n = count; ++ } ++ ++ n = dd_read(ibuf, n); + if (n == 0) + break; + if (n < 0) { +@@ -587,6 +600,7 @@ int dd_main(int argc UNUSED_PARAM, char + p16++; + } + } ++ count -= (G.flags & FLAG_COUNT_BYTES) ? n : 1; + if ((size_t)n == ibs) + G.in_full++; + else { +--- /dev/null ++++ b/testsuite/dd/dd-count-bytes +@@ -0,0 +1 @@ ++test "$(echo I WANT | busybox dd count=3 iflag=count_bytes 2>/dev/null)" = "I W" |