*** empty log message ***

[oweals/busybox.git] / libbb / syscalls.c

diff --git a/libbb/syscalls.c b/libbb/syscalls.c
index 021154602288907aa92fd838d959354af08123cc..383eb6ab944035a5ea358aad927bb11505b061c8 100644 (file)
--- a/libbb/syscalls.c
+++ b/libbb/syscalls.c
@@ -1,10 +1,9 @@
 /* vi: set sw=4 ts=4: */
 /*
- * Utility routines.
+ * some system calls possibly missing from libc
  *
- * Copyright (C) tons of folks.  Tracking down who wrote what
- * isn't something I'm going to worry about...  If you wrote something
- * here, please feel free to acknowledge your work.
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,30 +19,72 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
- * Based in part on code from sash, Copyright (c) 1999 by David I. Bell 
- * Permission has been granted to redistribute this code under the GPL.
- *
  */
 
 #include <stdio.h>
 #include <errno.h>
-#include <sys/syscall.h>
-#include <linux/unistd.h>
+#include <unistd.h>
+/* Kernel headers before 2.1.mumble need this on the Alpha to get
+   _syscall* defined.  */
+#define __LIBRARY__
 
+
+#include <sys/syscall.h>
+#ifndef __UCLIBC__
+#include <asm/unistd.h>
+#endif
 #include "libbb.h"
 
+#if defined(__ia64__)
+int sysfs( int option, unsigned int fs_index, char * buf)
+{
+       return(syscall(__NR_sysfs, option, fs_index, buf));
+}
+#else
+_syscall3(int, sysfs, int, option, unsigned int, fs_index, char *, buf);
+#endif
+
+#ifndef __NR_pivot_root
+#warning This kernel does not support the pivot_root syscall
+#warning -> The pivot_root system call is being stubbed out...
+int pivot_root(const char * new_root,const char * put_old)
+{
+       /* BusyBox was compiled against a kernel that did not support
+        *  the pivot_root system call.  To make this application work,
+        *  you will need to recompile with a kernel supporting the
+        *  pivot_root system call.
+        */
+       fprintf(stderr, "\n\nTo make this application work, you will need to recompile\n");
+       fprintf(stderr, "with a kernel supporting the pivot_root system call. -Erik\n\n");
+       errno=ENOSYS;
+       return -1;
+}
+#else
+#  if defined(__ia64__)
+       int pivot_root(const char * new_root,const char * put_old)
+       {
+               return(syscall(__NR_pivot_root, new_root, put_old));
+       }
+#  else
+    _syscall2(int,pivot_root,const char *,new_root,const char *,put_old);
+#  endif
+#endif
+
 
-_syscall1(int, sysinfo, struct sysinfo *, info);
 
-/* Include our own version of <sys/mount.h>, since libc5 doesn't
- * know about umount2 */
-extern _syscall1(int, umount, const char *, special_file);
-extern _syscall5(int, mount, const char *, special_file, const char *, dir,
-               const char *, fstype, unsigned long int, rwflag, const void *, data);
+
+#if __GNU_LIBRARY__ < 5 || ((__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1))
+/* These syscalls are not included as part of libc5 */
+_syscall2(int, bdflush, int, func, int, data);
+
+#ifndef __alpha__
+# define __NR_klogctl __NR_syslog
+  _syscall3(int, klogctl, int, type, char *, b, int, len);
+#endif
 
 #ifndef __NR_umount2
 # warning This kernel does not support the umount2 syscall
-# warning The umount2 system call is being stubbed out...
+# warning -> The umount2 system call is being stubbed out...
 int umount2(const char * special_file, int flags)
 {
        /* BusyBox was compiled against a kernel that did not support
@@ -57,14 +98,12 @@ int umount2(const char * special_file, int flags)
        return -1;
 }
 # else
-extern _syscall2(int, umount2, const char *, special_file, int, flags);
+_syscall2(int, umount2, const char *, special_file, int, flags);
 #endif
 
-#ifndef __NR_query_module
-static const int __NR_query_module = 167;
-#endif
-_syscall5(int, query_module, const char *, name, int, which,
-               void *, buf, size_t, bufsize, size_t*, ret);
+
+#endif /* __GNU_LIBRARY__ < 5 */
+
 
 /* END CODE */
 /*