diff options
| -rw-r--r-- | bin/dd/args.c | 1 | ||||
| -rw-r--r-- | bin/dd/dd.1 | 4 | ||||
| -rw-r--r-- | bin/dd/dd.c | 7 | ||||
| -rw-r--r-- | bin/dd/dd.h | 1 |
4 files changed, 13 insertions, 0 deletions
diff --git a/bin/dd/args.c b/bin/dd/args.c index f58551dec6a5..8e83c6cc608c 100644 --- a/bin/dd/args.c +++ b/bin/dd/args.c @@ -320,6 +320,7 @@ static const struct conv { { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, { "block", C_BLOCK, C_UNBLOCK, NULL }, { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, + { "fsync", C_FSYNC, 0, NULL }, { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, { "lcase", C_LCASE, C_UCASE, NULL }, { "noerror", C_NOERROR, 0, NULL }, diff --git a/bin/dd/dd.1 b/bin/dd/dd.1 index 352c85072d38..539e448b28b9 100644 --- a/bin/dd/dd.1 +++ b/bin/dd/dd.1 @@ -252,6 +252,10 @@ are maps used in historic and .No pre- Ns Bx 4.3 reno systems. +.It Cm fsync +Perform an +.Xr fsync 2 +on the output file before closing it. .It Cm lcase Transform uppercase characters into lowercase characters. .It Cm pareven , parnone , parodd , parset diff --git a/bin/dd/dd.c b/bin/dd/dd.c index 46175fa4c8f2..3db678b85004 100644 --- a/bin/dd/dd.c +++ b/bin/dd/dd.c @@ -164,6 +164,8 @@ setup(void) errx(1, "files is not supported for non-tape devices"); cap_rights_set(&rights, CAP_FTRUNCATE, CAP_IOCTL, CAP_WRITE); + if (ddflags & C_FSYNC) + cap_rights_set(&rights, CAP_FSYNC); if (out.name == NULL) { /* No way to check for read access here. */ out.fd = STDOUT_FILENO; @@ -505,6 +507,11 @@ dd_close(void) if (ftruncate(out.fd, out.seek_offset) == -1) err(1, "truncating %s", out.name); } + + if (ddflags & C_FSYNC) { + if (fsync(out.fd) == -1) + err(1, "fsyncing %s", out.name); + } } void diff --git a/bin/dd/dd.h b/bin/dd/dd.h index 8090252923fd..8c01cb4d17cc 100644 --- a/bin/dd/dd.h +++ b/bin/dd/dd.h @@ -101,6 +101,7 @@ typedef struct { #define C_NOXFER 0x10000000 #define C_NOINFO 0x20000000 #define C_PROGRESS 0x40000000 +#define C_FSYNC 0x80000000 #define C_PARITY (C_PAREVEN | C_PARODD | C_PARNONE | C_PARSET) |