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3687 fopen() O_CLOEXEC support via the "e" flag
*** 1,9 ****
--- 1,10 ----
'\" te
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.\" Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved.
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+ .\" Portions Copyright (c) 2013, OmniTI Computer Consulting, Inc. All Rights Reserved.
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*** 26,98 ****
The \fBfopen()\fR function opens the file whose pathname is the string pointed
to by \fIfilename\fR, and associates a stream with it.
.sp
.LP
The argument \fImode\fR points to a string beginning with one of the following
! sequences:
.sp
.ne 2
.na
! \fB\fBr\fR or \fBrb\fR\fR
.ad
.RS 20n
Open file for reading.
.RE
.sp
.ne 2
.na
! \fB\fBw\fR or \fBwb\fR\fR
.ad
.RS 20n
Truncate to zero length or create file for writing.
.RE
.sp
.ne 2
.na
! \fB\fBa\fR or \fBab\fR\fR
.ad
.RS 20n
Append; open or create file for writing at end-of-file.
.RE
.sp
.ne 2
.na
! \fB\fBr+\fR or \fBrb+\fR or \fBr+b\fR\fR
.ad
.RS 20n
Open file for update (reading and writing).
.RE
.sp
.ne 2
.na
! \fB\fBw+\fR or \fBwb+\fR or \fBw+b\fR\fR
.ad
.RS 20n
Truncate to zero length or create file for update.
.RE
.sp
.ne 2
.na
! \fB\fBa+\fR or \fBab+\fR or \fBa+b\fR\fR
.ad
.RS 20n
Append; open or create file for update, writing at end-of-file.
.RE
.sp
.LP
The character \fBb\fR has no effect, but is allowed for ISO C standard
conformance (see \fBstandards\fR(5)). Opening a file with read mode (\fBr\fR as
the first character in the \fImode\fR argument) fails if the file does not
exist or cannot be read.
.sp
.LP
Opening a file with append mode (\fBa\fR as the first character in the
\fImode\fR argument) causes all subsequent writes to the file to be forced to
the then current end-of-file, regardless of intervening calls to
\fBfseek\fR(3C). If two separate processes open the same file for append, each
process may write freely to the file without fear of destroying output being
--- 27,109 ----
The \fBfopen()\fR function opens the file whose pathname is the string pointed
to by \fIfilename\fR, and associates a stream with it.
.sp
.LP
The argument \fImode\fR points to a string beginning with one of the following
! base sequences:
.sp
.ne 2
.na
! \fB\fBr\fR\fR
.ad
.RS 20n
Open file for reading.
.RE
.sp
.ne 2
.na
! \fB\fBw\fR\fR
.ad
.RS 20n
Truncate to zero length or create file for writing.
.RE
.sp
.ne 2
.na
! \fB\fBa\fR\fR
.ad
.RS 20n
Append; open or create file for writing at end-of-file.
.RE
.sp
.ne 2
.na
! \fB\fBr+\fR\fR
.ad
.RS 20n
Open file for update (reading and writing).
.RE
.sp
.ne 2
.na
! \fB\fBw+\fR\fR
.ad
.RS 20n
Truncate to zero length or create file for update.
.RE
.sp
.ne 2
.na
! \fB\fBa+\fR\fR
.ad
.RS 20n
Append; open or create file for update, writing at end-of-file.
.RE
.sp
.LP
+ In addition to the base sequences for the \fImode\fR argument above, two
+ additional flags are supported via the \fBb\fR character and the \fBe\fR
+ character. Order of these additional flags (including the \fB+\fR) does
+ not matter.
+ .sp
+ .LP
The character \fBb\fR has no effect, but is allowed for ISO C standard
conformance (see \fBstandards\fR(5)). Opening a file with read mode (\fBr\fR as
the first character in the \fImode\fR argument) fails if the file does not
exist or cannot be read.
.sp
.LP
+ The character \fBe\fR will cause the underlying file descriptor to be
+ opened with the O_CLOEXEC flag as described in \fBopen\fR(2).
+ .sp
+ .LP
Opening a file with append mode (\fBa\fR as the first character in the
\fImode\fR argument) causes all subsequent writes to the file to be forced to
the then current end-of-file, regardless of intervening calls to
\fBfseek\fR(3C). If two separate processes open the same file for append, each
process may write freely to the file without fear of destroying output being
*** 390,395 ****
.SH SEE ALSO
.sp
.LP
\fBenable_extended_FILE_stdio\fR(3C), \fBfclose\fR(3C), \fBfdopen\fR(3C),
\fBfflush\fR(3C), \fBfreopen\fR(3C), \fBfsetpos\fR(3C), \fBrewind\fR(3C),
! \fBattributes\fR(5), \fBlf64\fR(5), \fBstandards\fR(5)
--- 401,406 ----
.SH SEE ALSO
.sp
.LP
\fBenable_extended_FILE_stdio\fR(3C), \fBfclose\fR(3C), \fBfdopen\fR(3C),
\fBfflush\fR(3C), \fBfreopen\fR(3C), \fBfsetpos\fR(3C), \fBrewind\fR(3C),
! \fBopen\fR(2), \fBattributes\fR(5), \fBlf64\fR(5), \fBstandards\fR(5)