* misc/Makefile (routines): Add getloadavg.

* sysdeps/generic/getloadavg.c: New file.
	* sysdeps/mach/getloadavg.c: New file.
	* sysdeps/unix/sysv/linux/getloadavg.c: New file.

ChangeLog

@@ -1,5 +1,10 @@
 1999-10-04  Roland McGrath  <roland@baalperazim.frob.com>
 
+	* misc/Makefile (routines): Add getloadavg.
+	* sysdeps/generic/getloadavg.c: New file.
+	* sysdeps/mach/getloadavg.c: New file.
+	* sysdeps/unix/sysv/linux/getloadavg.c: New file.
+
 	* sysdeps/generic/memrchr.c: New file, adapted from memchr.c.
 	* sysdeps/i386/bits/string.h (__memrchr): New function.
 	* string/string.h: Declare memrchr, __memrchr.

misc/Makefile

@@ -1,4 +1,4 @@
-# Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
+# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -56,7 +56,8 @@ routines := brk sbrk sstk ioctl \
 	    efgcvt efgcvt_r qefgcvt qefgcvt_r \
 	    hsearch hsearch_r tsearch lsearch \
 	    err error ustat \
-	    getsysstats dirname regexp
+	    getsysstats dirname regexp \
+	    getloadavg
 
 include ../Makeconfig
 

sysdeps/generic/getloadavg.c

@@ -0,0 +1,37 @@
+/* Get system load averages.  Stub version.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+
+/* Put the 1 minute, 5 minute and 15 minute load averages
+   into the first NELEM elements of LOADAVG.
+   Return the number written (never more than 3, but may be less than NELEM),
+   or -1 if an error occurred.  */
+
+int
+getloadavg (double loadavg[], int nelem)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (getloadavg)
+#include <stub-tag.h>

sysdeps/mach/getloadavg.c

@@ -0,0 +1,54 @@
+/* Get system load averages.  Mach version.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <mach.h>
+#include <mach/host_info.h>
+#include <hurd.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+
+/* Put the 1 minute, 5 minute and 15 minute load averages
+   into the first NELEM elements of LOADAVG.
+   Return the number written (never more than 3, but may be less than NELEM),
+   or -1 if an error occurred.  */
+
+int
+getloadavg (double loadavg[], int nelem)
+{
+  host_load_info_data_t info;
+  mach_msg_type_number_t size = HOST_LOAD_INFO_COUNT;
+  error_t err;
+  int i;
+
+  err = __host_info (__mach_host_self (), HOST_LOAD_INFO,
+		     (host_info_t) &info, &size);
+  if (err)
+    return __hurd_fail (err);
+  if (size < HOST_LOAD_INFO_COUNT)
+    return __hurd_fail (EGRATUITOUS);
+
+  if (nelem > 3)
+    nelem = 3;
+  for (i = 0; i < nelem; ++i)
+    loadavg[i] = (double) info.avenrun[i] * (double) LOAD_SCALE;
+
+  return i;
+}

sysdeps/unix/sysv/linux/getloadavg.c

@@ -0,0 +1,64 @@
+/* Get system load averages.  Linux (/proc/loadavg) version.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+/* Put the 1 minute, 5 minute and 15 minute load averages
+   into the first NELEM elements of LOADAVG.
+   Return the number written (never more than 3, but may be less than NELEM),
+   or -1 if an error occurred.  */
+
+int
+getloadavg (double loadavg[], int nelem)
+{
+  int fd;
+
+  fd = __open ("/proc/loadavg", O_RDONLY);
+  if (fd < 0)
+    return -1;
+  else
+    {
+      char buf[65], *p;
+      ssize_t nread;
+      int i;
+
+      nread = __read (fd, buf, sizeof buf - 1);
+      close (fd);
+      if (nread < 0)
+	return -1;
+      buf[nread - 1] = '\0';
+
+      if (nelem > 3)
+	nelem = 3;
+      p = buf;
+      for (i = 0; i < nelem; ++i)
+	{
+	  char *endp;
+	  loadavg[i] = strtod (p, &endp);
+	  if (!endp || endp == p)
+	    break;
+	  p = endp;
+	}
+
+      return i;
+    }
+}