Changes in read.2

16b1438c - read.2: Describe debug.iosize_max_clamp

Sat, 10 Feb 2024 09:40:07 +0000

read.2: Describe debug.iosize_max_clampPR: 276937(cherry picked from commit 3e9515846f8cbff0ecccaab65d9f70890d04429e) List of files: /freebsd-14.2/lib/libc/sys/read.2

b2c76c41 - Remove $FreeBSD$: one-line nroff pattern

Wed, 16 Aug 2023 17:55:15 +0000

Remove $FreeBSD$: one-line nroff patternRemove /^\.\\"\s*\$FreeBSD\$$\n/ List of files: /freebsd-14.2/lib/libc/sys/read.2

44b0b943 - Revert "Add extra EINVAL information about wrong block size to read(2)/write(2)"

Sat, 08 Oct 2022 10:23:51 +0000

Revert "Add extra EINVAL information about wrong block size to read(2)/write(2)"This reverts commit 1c2be25f6080ee63baeae55e45761e1310d1b756.kib@ pointed out that it is perfectly fine to write at arbitrary regularfile offsets. For example, in a 4K block size character device, geomdoesn't support writing / reading 515 byte blocks. The description isperhaps not applicable to all EINVALs returned. List of files: /freebsd-14.2/lib/libc/sys/read.2

1c2be25f - Add extra EINVAL information about wrong block size to read(2)/write(2)

Fri, 07 Oct 2022 11:32:37 +0000

Add extra EINVAL information about wrong block size to read(2)/write(2)The read system call will return EINVAL if the current file offset isnot a multiple of the block size. This also applies to write(2). Add anentry for EINVAL about this error to both man pages.PR: 91149Event: Aberdeen Hackathon 2022Differential Revision: https://reviews.freebsd.org/D24617 List of files: /freebsd-14.2/lib/libc/sys/read.2

63619b6d - vfs: add restrictions to read(2) of a directory [2/2]

Thu, 04 Jun 2020 18:17:25 +0000

vfs: add restrictions to read(2) of a directory [2/2]This commit adds the priv(9) that waters down the sysctl to make it onlyallow read(2) of a dirfd by the system root. Jailed root is not allowed, butjail policy and superuser policy will abstain from allowing/denying it sothat a MAC module can fully control the policy.Such a MAC module has been written, and can be found at:https://people.freebsd.org/~kevans/mac_read_dir-0.1.0.tar.gzIt is expected that the MAC module won't be needed by many, as most onlyneed to do such diagnostics that require this behavior as system rootanyways. Interested parties are welcome to grab the MAC module above andcreate a port or locally integrate it, and with enough support it could seeintroduction to base. As noted in mac_read_dir.c, it is released under theBSD 2 clause license and allows the restrictions to be lifted for onlyjailed root or for all unprivileged users.PR: 246412Reviewed by: mckusick, kib, emaste, jilles, cy, phk, imp (all previous)Reviewed by: rgrimes (latest version)Differential Revision: https://reviews.freebsd.org/D24596 List of files: /freebsd-14.2/lib/libc/sys/read.2

dcef4f65 - vfs: add restrictions to read(2) of a directory [1/2]

Thu, 04 Jun 2020 18:09:55 +0000

vfs: add restrictions to read(2) of a directory [1/2]Historically, we've allowed read() of a directory and some filesystems willaccommodate (e.g. ufs/ffs, msdosfs). From the history department staffed byWarner: <

e42b0964 - Document EINTEGRITY errors for many system calls.

Mon, 30 Mar 2020 21:44:00 +0000

Document EINTEGRITY errors for many system calls.EINTEGRITY was previously documented as a UFS-specific error formount(2). This documents EINTEGRITY as a filesystem-independent errorthat may be reported by the backing store of a filesystem.While here, document EIO as a filesystem-independent error for bothmount(2) and posix_fadvise(2). EIO was previously only documented forUFS for mount(2).Reviewed by: mckusickSuggested by: mckusickMFC after: 2 weeksSponsored by: Chelsio CommunicationsDifferential Revision: https://reviews.freebsd.org/D24168 List of files: /freebsd-14.2/lib/libc/sys/read.2

8c951814 - Document atomicity for read(2) and write(2).

Sat, 06 Jul 2019 20:31:37 +0000

Document atomicity for read(2) and write(2).Take part of the text from POSIX 2018 edition and describe theatomicity requirements for read and write syscalls. See p1003.1-2018,Vol.2, 2.9.7 Threads interaction with Regular File Operations.Reviewed by: asomersSponsored by: The FreeBSD FoundationMFC after: 3 daysDifferential revision: https://reviews.freebsd.org/D20867 List of files: /freebsd-14.2/lib/libc/sys/read.2

aeb71118 - Mark all the system calls that were in 1st Edition Unix as such in the

Fri, 01 Dec 2017 22:26:36 +0000

Mark all the system calls that were in 1st Edition Unix as such in theHISTORY section. Note: Any system calls that were added prior to v7,but after v1 weren't changed.Obtained from: http://www.tuhs.org/cgi-bin/utree.pl?file=V1/man/man2 List of files: /freebsd-14.2/lib/libc/sys/read.2

fbbd9655 - Renumber copyright clause 4

Tue, 28 Feb 2017 23:42:47 +0000

Renumber copyright clause 4Renumber cluase 4 to 3, per what everybody else did when BSD grantedthem permission to remove clause 3. My insistance on keeping the samenumbering for legal reasons is too pedantic, so give up on that point.Submitted by: Jan Schaumann Pull Request: https://github.com/freebsd/freebsd/pull/96 List of files: /freebsd-14.2/lib/libc/sys/read.2

d0ec8fd0 - Remove sys/types.h due to STANDARDS and unistd.h also includes sys/types.h.

Tue, 15 Dec 2015 15:19:06 +0000

Remove sys/types.h due to STANDARDS and unistd.h also includes sys/types.h. List of files: /freebsd-14.2/lib/libc/sys/read.2

c36029e6 - Consistently reference file descriptors as "fd". 55 other manpages

Thu, 12 Sep 2013 00:53:38 +0000

Consistently reference file descriptors as "fd". 55 other manpagesused "fd", while these used "d" and "filedes".MFC after: 1 weekApproved by: gjbApproved by: re (delphij) List of files: /freebsd-14.2/lib/libc/sys/read.2

74af13c6 - pread(2) might fail with EBUSY, so document it

Sun, 29 Apr 2012 22:23:00 +0000

pread(2) might fail with EBUSY, so document itPR: docs/167201Submitted by: Kurt Jaeger Approved by: cpercivaMFC after: 3 days List of files: /freebsd-14.2/lib/libc/sys/read.2

e0c980d9 - The sys/uio.h header is needed only for readv(2), preadv(2), writev(2) and

Sun, 22 Jan 2012 11:15:48 +0000

The sys/uio.h header is needed only for readv(2), preadv(2), writev(2) andpwritev(2). Document it more precisely.Reviewed by: jillesMFC after: 3 days List of files: /freebsd-14.2/lib/libc/sys/read.2

c879ae35 - Per Regents of the University of Calfornia letter, remove advertising

Tue, 09 Jan 2007 00:28:16 +0000

Per Regents of the University of Calfornia letter, remove advertisingclause.# If I've done so improperly on a file, please let me know. List of files: /freebsd-14.2/lib/libc/sys/read.2

2aeccd6e - Avoid a potential hard sentence break.

Sat, 21 Oct 2006 18:03:53 +0000

Avoid a potential hard sentence break. List of files: /freebsd-14.2/lib/libc/sys/read.2

1be947e9 - o Follow the trend and try to explain what the slow device is.

Wed, 11 Oct 2006 13:33:02 +0000

o Follow the trend and try to explain what the slow device is.Not ideal but better than nothing.Obtained from: OpenBSD, NetBSD List of files: /freebsd-14.2/lib/libc/sys/read.2

110e1704 - -mdoc sweep.

Thu, 17 Nov 2005 13:00:00 +0000

-mdoc sweep. List of files: /freebsd-14.2/lib/libc/sys/read.2

87a236ca - Document the ECONNRESET errno value.

Fri, 29 Jul 2005 07:42:10 +0000

Document the ECONNRESET errno value. List of files: /freebsd-14.2/lib/libc/sys/read.2

bcd9e0dd - - Add two new system calls: preadv() and pwritev() which are like readv()

Thu, 07 Jul 2005 18:17:55 +0000

- Add two new system calls: preadv() and pwritev() which are like readv() and writev() except that they take an additional offset argument and do not change the current file position. In SAT speak: preadv:readv::pread:read and pwritev:writev::pwrite:write.- Try to reduce code duplication some by merging most of the old kern_foov() and dofilefoo() functions into new dofilefoo() functions that are called by kern_foov() and kern_pfoov(). The non-v functions now all generate a simple uio on the stack from the passed in arguments and then call kern_foov(). For example, read() now just builds a uio and calls kern_readv() and pwrite() just builds a uio and calls kern_pwritev().PR: kern/80362Submitted by: Marc Olzheim marcolz at stack dot nl (1)Approved by: re (scottl)MFC after: 1 week List of files: /freebsd-14.2/lib/libc/sys/read.2