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Diffstat (limited to 'man2/wait4.2')
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diff --git a/man2/wait4.2 b/man2/wait4.2 deleted file mode 100644 index fe0c175f9..000000000 --- a/man2/wait4.2 +++ /dev/null @@ -1,169 +0,0 @@ -.\" Copyright (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de) -.\" and Copyright (c) 2004 by Michael Kerrisk <mtk.manpages@gmail.com> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.\" Modified Sat Jul 24 13:32:44 1993 by Rik Faith (faith@cs.unc.edu) -.\" Modified Mon Jun 23 14:09:52 1997 by aeb - add EINTR. -.\" Modified Tue Jul 7 12:26:42 1998 by aeb - changed return value wait3 -.\" Modified 2004-11-11, Michael Kerrisk <mtk.manpages@gmail.com> -.\" Rewrote much of this page, and removed much duplicated text, -.\" replacing with pointers to wait.2 -.\" -.TH wait4 2 (date) "Linux man-pages (unreleased)" -.SH NAME -wait3, wait4 \- wait for process to change state, BSD style -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <sys/wait.h> -.PP -.BI "pid_t wait3(int *_Nullable " "wstatus" ", int " options , -.BI " struct rusage *_Nullable " rusage ); -.BI "pid_t wait4(pid_t " pid ", int *_Nullable " wstatus ", int " options , -.BI " struct rusage *_Nullable " rusage ); -.fi -.PP -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.PP -.BR wait3 (): -.nf - Since glibc 2.26: - _DEFAULT_SOURCE - || (_XOPEN_SOURCE >= 500 && - ! (_POSIX_C_SOURCE >= 200112L - || _XOPEN_SOURCE >= 600)) - From glibc 2.19 to glibc 2.25: - _DEFAULT_SOURCE || _XOPEN_SOURCE >= 500 - glibc 2.19 and earlier: - _BSD_SOURCE || _XOPEN_SOURCE >= 500 -.\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED -.fi -.PP -.BR wait4 (): -.nf - Since glibc 2.19: - _DEFAULT_SOURCE - glibc 2.19 and earlier: - _BSD_SOURCE -.fi -.SH DESCRIPTION -These functions are nonstandard; in new programs, the use of -.BR waitpid (2) -or -.BR waitid (2) -is preferable. -.PP -The -.BR wait3 () -and -.BR wait4 () -system calls are similar to -.BR waitpid (2), -but additionally return resource usage information about the -child in the structure pointed to by -.IR rusage . -.PP -Other than the use of the -.I rusage -argument, the following -.BR wait3 () -call: -.PP -.in +4n -.EX -wait3(wstatus, options, rusage); -.EE -.in -.PP -is equivalent to: -.PP -.in +4n -.EX -waitpid(\-1, wstatus, options); -.EE -.in -.PP -Similarly, the following -.BR wait4 () -call: -.PP -.in +4n -.EX -wait4(pid, wstatus, options, rusage); -.EE -.in -.PP -is equivalent to: -.PP -.in +4n -.EX -waitpid(pid, wstatus, options); -.EE -.in -.PP -In other words, -.BR wait3 () -waits of any child, while -.BR wait4 () -can be used to select a specific child, or children, on which to wait. -See -.BR wait (2) -for further details. -.PP -If -.I rusage -is not NULL, the -.I struct rusage -to which it points will be filled with accounting information -about the child. -See -.BR getrusage (2) -for details. -.SH RETURN VALUE -As for -.BR waitpid (2). -.SH ERRORS -As for -.BR waitpid (2). -.SH STANDARDS -None. -.SH HISTORY -4.3BSD. -.PP -SUSv1 included a specification of -.BR wait3 (); -SUSv2 included -.BR wait3 (), -but marked it LEGACY; -SUSv3 removed it. -.PP -Including -.I <sys/time.h> -is not required these days, but increases portability. -(Indeed, -.I <sys/resource.h> -defines the -.I rusage -structure with fields of type -.I struct timeval -defined in -.IR <sys/time.h> .) -.SS C library/kernel differences -On Linux, -.BR wait3 () -is a library function implemented on top of the -.BR wait4 () -system call. -.SH SEE ALSO -.BR fork (2), -.BR getrusage (2), -.BR sigaction (2), -.BR signal (2), -.BR wait (2), -.BR signal (7) |