d712edc6d
Rostislav Skudnov
2019-02-14
Subject
dd: add 'oflag=append'
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coreutils/dd.c+10 -6
| @@ -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); | |
docs/posix_conformance.txt+1 -0
| @@ -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 | |