diff options
Diffstat (limited to 'manual/llio.texi')
| -rw-r--r-- | manual/llio.texi | 34 |
1 files changed, 14 insertions, 20 deletions
diff --git a/manual/llio.texi b/manual/llio.texi index e2697aa..9643bcb 100644 --- a/manual/llio.texi +++ b/manual/llio.texi @@ -690,7 +690,7 @@ interpreted, in the same way as for the @code{fseek} function, and it must be one of the symbolic constants @code{SEEK_SET}, @code{SEEK_CUR}, or @code{SEEK_END}. -@table @code +@vtable @code @item SEEK_SET Specifies that @var{offset} is a count of characters from the beginning of the file. @@ -706,7 +706,7 @@ extent of the file; a positive count specifies a position past the current end. If you set the position past the current end, and actually write data, you will extend the file with zeros up to that position. -@end table +@end vtable The return value from @code{lseek} is normally the resulting file position, measured in bytes from the beginning of the file. @@ -858,7 +858,7 @@ These aliases for the @samp{SEEK_@dots{}} constants exist for the sake of compatibility with older BSD systems. They are defined in two different header files: @file{fcntl.h} and @file{sys/file.h}. -@table @code +@vtable @code @item L_SET An alias for @code{SEEK_SET}. @@ -867,7 +867,7 @@ An alias for @code{SEEK_CUR}. @item L_XTND An alias for @code{SEEK_END}. -@end table +@end vtable @node Descriptors and Streams @section Descriptors and Streams @@ -938,11 +938,10 @@ file descriptors belonging to the standard streams @code{stdin}, @code{stdout}, and @code{stderr}; see @ref{Standard Streams}. @pindex unistd.h +@vtable @code @comment unistd.h @comment POSIX.1 -@table @code @item STDIN_FILENO -@vindex STDIN_FILENO This macro has value @code{0}, which is the file descriptor for standard input. @cindex standard input file descriptor @@ -950,7 +949,6 @@ standard input. @comment unistd.h @comment POSIX.1 @item STDOUT_FILENO -@vindex STDOUT_FILENO This macro has value @code{1}, which is the file descriptor for standard output. @cindex standard output file descriptor @@ -958,10 +956,9 @@ standard output. @comment unistd.h @comment POSIX.1 @item STDERR_FILENO -@vindex STDERR_FILENO This macro has value @code{2}, which is the file descriptor for standard error output. -@end table +@end vtable @cindex standard error file descriptor @node Stream/Descriptor Precautions @@ -1492,7 +1489,7 @@ and extending @var{length} bytes. The valid BSD values for @var{advice} are: -@table @code +@vtable @code @item MADV_NORMAL The region should receive no further special treatment. @@ -1515,11 +1512,11 @@ The region is no longer needed. The kernel may free these pages, causing any changes to the pages to be lost, as well as swapped out pages to be discarded. -@end table +@end vtable The POSIX names are slightly different, but with the same meanings: -@table @code +@vtable @code @item POSIX_MADV_NORMAL This corresponds with BSD's @code{MADV_NORMAL}. @@ -1536,7 +1533,7 @@ This corresponds with BSD's @code{MADV_WILLNEED}. @item POSIX_MADV_DONTNEED This corresponds with BSD's @code{MADV_DONTNEED}. -@end table +@end vtable @code{madvise} returns @math{0} for success and @math{-1} for error. Errors include: @@ -2906,7 +2903,7 @@ descriptions of the individual commands. Briefly, here is a list of what the various commands are. -@table @code +@vtable @code @item F_DUPFD Duplicate the file descriptor (return another file descriptor pointing to the same open file). @xref{Duplicating Descriptors}. @@ -2951,7 +2948,7 @@ Get process or process group ID to receive @code{SIGIO} signals. @item F_SETOWN Set process or process group ID to receive @code{SIGIO} signals. @xref{Interrupt Input}. -@end table +@end vtable This function is a cancellation point in multi-threaded programs. This is a problem if the thread allocates some resources (like memory, file @@ -3827,25 +3824,22 @@ you know if it notices one. The following macros are defined for use as values for the @code{l_type} member of the @code{flock} structure. The values are integer constants. -@table @code +@vtable @code @comment fcntl.h @comment POSIX.1 -@vindex F_RDLCK @item F_RDLCK This macro is used to specify a read (or shared) lock. @comment fcntl.h @comment POSIX.1 -@vindex F_WRLCK @item F_WRLCK This macro is used to specify a write (or exclusive) lock. @comment fcntl.h @comment POSIX.1 -@vindex F_UNLCK @item F_UNLCK This macro is used to specify that the region is unlocked. -@end table +@end vtable As an example of a situation where file locking is useful, consider a program that can be run simultaneously by several different users, that |