diff options
| author | Rostislav Skudnov | 2019-02-06 11:57:15 +0000 |
|---|---|---|
| committer | Denys Vlasenko | 2019-02-14 13:01:46 +0100 |
| commit | d712edc6d8f904a4e9d2e26fc9e8a4c45a2cf0b0 (patch) | |
| tree | 63742d158c4591be44d895fb862659d40021369b | |
| parent | f81e0120f4478c58e126bcadb19b9954ed184e8f (diff) | |
| download | busybox-d712edc6d8f904a4e9d2e26fc9e8a4c45a2cf0b0.zip busybox-d712edc6d8f904a4e9d2e26fc9e8a4c45a2cf0b0.tar.gz | |
dd: add 'oflag=append'
Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | coreutils/dd.c | 16 | ||||
| -rw-r--r-- | docs/posix_conformance.txt | 1 |
2 files changed, 11 insertions, 6 deletions
diff --git a/coreutils/dd.c b/coreutils/dd.c index 4b31e9a..2fb9da7 100644 --- 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] [oflag=seek_bytes]" +//usage: " [iflag=skip_bytes|fullblock] [oflag=seek_bytes|append]" //usage: ) //usage:#define dd_full_usage "\n\n" //usage: "Copy a file with converting and formatting\n" @@ -84,6 +84,7 @@ //usage: "\n iflag=skip_bytes skip=N is in bytes" //usage: "\n iflag=fullblock Read full blocks" //usage: "\n oflag=seek_bytes seek=N is in bytes" +//usage: "\n oflag=append Open output file in append mode" //usage: ) //usage: IF_FEATURE_DD_STATUS( //usage: "\n status=noxfer Suppress rate output" @@ -140,11 +141,12 @@ enum { /* start of output flags */ FLAG_OFLAG_SHIFT = 7, FLAG_SEEK_BYTES = (1 << 7) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_APPEND = (1 << 8) * ENABLE_FEATURE_DD_IBS_OBS, /* end of output flags */ - FLAG_TWOBUFS = (1 << 8) * ENABLE_FEATURE_DD_IBS_OBS, - FLAG_COUNT = 1 << 9, - FLAG_STATUS_NONE = 1 << 10, - FLAG_STATUS_NOXFER = 1 << 11, + FLAG_TWOBUFS = (1 << 9) * ENABLE_FEATURE_DD_IBS_OBS, + FLAG_COUNT = 1 << 10, + FLAG_STATUS_NONE = 1 << 11, + FLAG_STATUS_NOXFER = 1 << 12, }; static void dd_output_status(int UNUSED_PARAM cur_signal) @@ -267,7 +269,7 @@ int dd_main(int argc UNUSED_PARAM, char **argv) static const char iflag_words[] ALIGN1 = "skip_bytes\0""fullblock\0"; static const char oflag_words[] ALIGN1 = - "seek_bytes\0"; + "seek_bytes\0append\0"; #endif #if ENABLE_FEATURE_DD_STATUS static const char status_words[] ALIGN1 = @@ -451,6 +453,8 @@ int dd_main(int argc UNUSED_PARAM, char **argv) if (!seek && !(G.flags & FLAG_NOTRUNC)) oflag |= O_TRUNC; + if (G.flags & FLAG_APPEND) + oflag |= O_APPEND; xmove_fd(xopen(outfile, oflag), ofd); diff --git a/docs/posix_conformance.txt b/docs/posix_conformance.txt index 0e6f4a3..f6e8858 100644 --- a/docs/posix_conformance.txt +++ b/docs/posix_conformance.txt @@ -183,6 +183,7 @@ dd compatibility options: iflag=skip_bytes| yes | | iflag=fullblock | yes | | oflag=seek_bytes| yes | | + oflag=append | yes | | df POSIX options option | exists | compliant | remarks |