* getloadavg.c: Include fcntl--.h rather than fcntl.h.

Do not include unistd-safer.h.
(getloadavg): Don't call fd_safer; no longer needed
now that we include fcntl--.h.
* getloadavg.c:
Assume HAVE_UNISTD_H, i.e., include <unistd.h> unconditionally.
Assume HAVE_FCNTL_H (i.e., include <fcntl.h> unconditionally,
and don't include <sys/file.h>).
* getloadavg.c (getloadavg) [__CYGWIN__]: Port to cygwin.
[__linux__]: Allocate a big enough buffer for /proc/loadavg.
[!LDAV_DONE]: Avoid unused variable warning.

diff --git a/lib/getloadavg.c b/lib/getloadavg.c
index d1ed95af48bc4c42df2fe35b79affe2dc036871b..2a5013148ea161054d7b0c45725316f19b3f25a2 100644 (file)
--- a/lib/getloadavg.c
+++ b/lib/getloadavg.c
@@ -47,7 +47,8 @@
                                the nlist n_name element is a pointer,
                                not an array.
    HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'.
-   LINUX_LDAV_FILE             [__linux__]: File containing load averages.
+   LINUX_LDAV_FILE             [__linux__, __CYGWIN__]: File containing
+                               load averages.
 
    Specific system predefines this file uses, aside from setting
    default values if not emacs:
@@ -70,6 +71,7 @@
    WINDOWS32                   No-op for Windows95/NT.
    __linux__                   Linux: assumes /proc file system mounted.
                                Support from Michael K. Johnson.
+   __CYGWIN__                  Cygwin emulates linux /proc/loadavg.
    __NetBSD__                  NetBSD: assumes /kern file system mounted.
 
    In addition, to avoid nesting many #ifdefs, we internally set
@@ -346,9 +348,7 @@
 #  define LDAV_SYMBOL "avenrun"
 # endif
 
-# ifdef HAVE_UNISTD_H
-#  include <unistd.h>
-# endif
+# include <unistd.h>
 
 /* LOAD_AVE_TYPE should only get defined if we're going to use the
    nlist method.  */
@@ -447,9 +447,7 @@
 #  include <sys/dg_sys_info.h>
 # endif
 
-# include <fcntl.h>
-
-# include "unistd-safer.h"
+# include "fcntl--.h"
 \f
 /* Avoid static vars inside a function since in HPUX they dump as pure.  */
 
@@ -567,7 +565,7 @@ getloadavg (double loadavg[], int nelem)
 
 # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */
 
-# if !defined (LDAV_DONE) && defined (__linux__)
+# if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__))
 #  define LDAV_DONE
 #  undef LOAD_AVE_TYPE
 
@@ -575,7 +573,7 @@ getloadavg (double loadavg[], int nelem)
 #   define LINUX_LDAV_FILE "/proc/loadavg"
 #  endif
 
-  char ldavgbuf[3 * (INT_STRLEN_BOUND (long int) + sizeof ".00")];
+  char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")];
   char const *ptr = ldavgbuf;
   int fd, count;
 
@@ -604,7 +602,7 @@ getloadavg (double loadavg[], int nelem)
 
   return elem;
 
-# endif /* __linux__ */
+# endif /* __linux__ || __CYGWIN__ */
 
 # if !defined (LDAV_DONE) && defined (__NetBSD__)
 #  define LDAV_DONE
@@ -909,7 +907,7 @@ getloadavg (double loadavg[], int nelem)
   if (!getloadavg_initialized)
     {
 #  ifndef SUNOS_5
-      channel = fd_safer (open ("/dev/kmem", O_RDONLY));
+      channel = open ("/dev/kmem", O_RDONLY);
       if (channel >= 0)
        {
          /* Set the channel to close on exec, so it does not
@@ -968,14 +966,13 @@ getloadavg (double loadavg[], int nelem)
 #  define LDAV_DONE
 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */
 
-# ifdef LDAV_DONE
-  return elem;
-# else
+# if !defined LDAV_DONE
   /* Set errno to zero to indicate that there was no particular error;
      this function just can't work at all on this system.  */
   errno = 0;
-  return -1;
+  elem = -1;
 # endif
+  return elem;
 }
 
 #endif /* ! HAVE_GETLOADAVG */