Define struct rusage in sys/wait.h when required (bug 21575).

Some older standards (XPG4.2 through POSIX.1:2001, XSI only) require
sys/wait.h to include the definition of struct rusage.  This is
missing in glibc.

This patch adds the required definition.  struct rusage is moved to a
new header bits/types/struct_rusage.h to avoid bringing in the whole
of sys/resource.h (although the standards in question do allow the
whole of sys/resource.h to be brought in).  In the five
bits/resource.h headers, the only variation between the definitions of
struct rusage is that the sysdeps/unix/sysv/linux version is prepared
for x32 (by having anonymous unions with __syscall_slong_t fields) and
the others are not.  Thus, this version is suitable for use
generically (everything other than x32 simply has __syscall_slong_t
the same as long int, so there are no API or ABI changes involved, and
anonymous unions are already a required language feature for glibc
headers elsewhere), and this patch uses it as a base for the single
implementation of bits/types/struct_rusage.h.

Tested for x86_64, and with build-many-glibcs.py.

	[BZ #21575]
	* resource/bits/types/struct_rusage.h: New file.
	* include/bits/types/struct_rusage.h: Likewise.
	* bits/resource.h (struct rusage): Include
	<bits/types/struct_rusage.h> instead of defining here.
	* sysdeps/unix/sysv/linux/bits/resource.h (struct rusage):
	Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/resource.h (struct rusage):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/resource.h (struct rusage):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/resource.h (struct rusage):
	Likewise.
	* resource/Makefile (headers): Add bits/types/struct_rusage.h.
	* posix/sys/wait.h [__USE_XOPEN_EXTENDED && !__USE_XOPEN2K8]:
	Include <bits/types/struct_rusage.h>

1 files changed, 1 insertions, 43 deletions

diff --git a/bits/resource.h b/bits/resource.h
index 5f22fb7e9b..750351b773 100644
--- a/bits/resource.h
+++ b/bits/resource.h
@@ -130,49 +130,7 @@ enum __rusage_who
   };
 
 #include <bits/types/struct_timeval.h>
-
-/* Structure which says how much of each resource has been used.  */
-struct rusage
-  {
-    /* Total amount of user time used.  */
-    struct timeval ru_utime;
-    /* Total amount of system time used.  */
-    struct timeval ru_stime;
-    /* Maximum resident set size (in kilobytes).  */
-    long int ru_maxrss;
-    /* Amount of sharing of text segment memory
-       with other processes (kilobyte-seconds).  */
-    long int ru_ixrss;
-    /* Amount of data segment memory used (kilobyte-seconds).  */
-    long int ru_idrss;
-    /* Amount of stack memory used (kilobyte-seconds).  */
-    long int ru_isrss;
-    /* Number of soft page faults (i.e. those serviced by reclaiming
-       a page from the list of pages awaiting reallocation.  */
-    long int ru_minflt;
-    /* Number of hard page faults (i.e. those that required I/O).  */
-    long int ru_majflt;
-    /* Number of times a process was swapped out of physical memory.  */
-    long int ru_nswap;
-    /* Number of input operations via the file system.  Note: This
-       and `ru_oublock' do not include operations with the cache.  */
-    long int ru_inblock;
-    /* Number of output operations via the file system.  */
-    long int ru_oublock;
-    /* Number of IPC messages sent.  */
-    long int ru_msgsnd;
-    /* Number of IPC messages received.  */
-    long int ru_msgrcv;
-    /* Number of signals delivered.  */
-    long int ru_nsignals;
-    /* Number of voluntary context switches, i.e. because the process
-       gave up the process before it had to (usually to wait for some
-       resource to be available).  */
-    long int ru_nvcsw;
-    /* Number of involuntary context switches, i.e. a higher priority process
-       became runnable or the current process used up its time slice.  */
-    long int ru_nivcsw;
-  };
+#include <bits/types/struct_rusage.h>
 
 /* Priority limits.  */
 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */