diff options
Diffstat (limited to 'man2/lseek.2')
| -rw-r--r-- | man2/lseek.2 | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/man2/lseek.2 b/man2/lseek.2 index 7ef7930..93b3f6d 100644 --- a/man2/lseek.2 +++ b/man2/lseek.2 @@ -15,7 +15,7 @@ .\" Modified 2003-08-21 by Andries Brouwer <aeb@cwi.nl> .\" 2011-09-18, mtk, Added SEEK_DATA + SEEK_HOLE .\" -.TH lseek 2 2023-03-30 "Linux man-pages 6.05.01" +.TH lseek 2 2023-10-31 "Linux man-pages 6.7" .SH NAME lseek \- reposition read/write file offset .SH LIBRARY @@ -24,7 +24,7 @@ Standard C library .SH SYNOPSIS .nf .B #include <unistd.h> -.PP +.P .BI "off_t lseek(int " fd ", off_t " offset ", int " whence ); .fi .SH DESCRIPTION @@ -52,7 +52,7 @@ bytes. The file offset is set to the size of the file plus .I offset bytes. -.PP +.P .BR lseek () allows the file offset to be set beyond the end of the file (but this does not change the size of the file). @@ -87,19 +87,19 @@ If there is no hole past .IR offset , then the file offset is adjusted to the end of the file (i.e., there is an implicit hole at the end of any file). -.PP +.P In both of the above cases, .BR lseek () fails if .I offset points past the end of the file. -.PP +.P These operations allow applications to map holes in a sparsely allocated file. This can be useful for applications such as file backup tools, which can save space when creating backups and preserve holes, if they have a mechanism for discovering holes. -.PP +.P For the purposes of these operations, a hole is a sequence of zeros that (normally) has not been allocated in the underlying file storage. However, a filesystem is not obliged to report holes, @@ -122,7 +122,7 @@ it can be considered to consist of data that is a sequence of zeros). .\" https://lkml.org/lkml/2011/4/22/79 .\" http://lwn.net/Articles/440255/ .\" http://blogs.oracle.com/bonwick/entry/seek_hole_and_seek_data -.PP +.P The .B _GNU_SOURCE feature test macro must be defined in order to obtain the definitions of @@ -131,7 +131,7 @@ and .B SEEK_HOLE from .IR <unistd.h> . -.PP +.P The .B SEEK_HOLE and @@ -216,7 +216,7 @@ on a terminal device fails with the error POSIX.1-2008. .SH HISTORY POSIX.1-2001, SVr4, 4.3BSD. -.PP +.P .B SEEK_DATA and .B SEEK_HOLE @@ -229,7 +229,7 @@ See .BR open (2) for a discussion of the relationship between file descriptors, open file descriptions, and files. -.PP +.P If the .B O_APPEND file status flag is set on the open file description, @@ -238,7 +238,7 @@ then a .I always moves the file offset to the end of the file, regardless of the use of .BR lseek (). -.PP +.P Some devices are incapable of seeking and POSIX does not specify which devices must support .BR lseek (). |