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Diffstat (limited to 'manual/process.texi')
| -rw-r--r-- | manual/process.texi | 48 |
1 files changed, 6 insertions, 42 deletions
diff --git a/manual/process.texi b/manual/process.texi index aa59040..25bdb8e 100644 --- a/manual/process.texi +++ b/manual/process.texi @@ -763,53 +763,17 @@ signal number of the signal that caused the child process to stop. @node BSD Wait Functions -@section BSD Process Wait Functions +@section BSD Process Wait Function -@Theglibc{} also provides these related facilities for compatibility -with BSD Unix. BSD uses the @code{union wait} data type to represent -status values rather than an @code{int}. The two representations are -actually interchangeable; they describe the same bit patterns. @Theglibc{} -defines macros such as @code{WEXITSTATUS} so that they will -work on either kind of object, and the @code{wait} function is defined -to accept either type of pointer as its @var{status-ptr} argument. - -These functions are declared in @file{sys/wait.h}. +@Theglibc{} also provides the @code{wait3} function for compatibility +with BSD. This function is declared in @file{sys/wait.h}. It is the +predecessor to @code{wait4}, which is more flexible. @code{wait3} is +now obsolete. @pindex sys/wait.h @comment sys/wait.h @comment BSD -@deftp {Data Type} {union wait} -This data type represents program termination status values. It has -the following members: - -@table @code -@item int w_termsig -The value of this member is the same as that of the -@code{WTERMSIG} macro. - -@item int w_coredump -The value of this member is the same as that of the -@code{WCOREDUMP} macro. - -@item int w_retcode -The value of this member is the same as that of the -@code{WEXITSTATUS} macro. - -@item int w_stopsig -The value of this member is the same as that of the -@code{WSTOPSIG} macro. -@end table - -Instead of accessing these members directly, you should use the -equivalent macros. -@end deftp - -The @code{wait3} function is the predecessor to @code{wait4}, which is -more flexible. @code{wait3} is now obsolete. - -@comment sys/wait.h -@comment BSD -@deftypefun pid_t wait3 (union wait *@var{status-ptr}, int @var{options}, struct rusage *@var{usage}) +@deftypefun pid_t wait3 (int *@var{status-ptr}, int @var{options}, struct rusage *@var{usage}) @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @var{usage} is a null pointer, @code{wait3} is equivalent to @code{waitpid (-1, @var{status-ptr}, @var{options})}. |