Update a bunch of docs. Run a script to update my email addr.

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

diff --git a/libbb/syscalls.c b/libbb/syscalls.c
index 021154602288907aa92fd838d959354af08123cc..ee58d3674e609caa03dd6e605b24646b28c6fd1d 100644 (file)
--- a/libbb/syscalls.c
+++ b/libbb/syscalls.c
@@ -1,10 +1,8 @@
 /* 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) 1999-2003 by Erik Andersen <andersen@codepoet.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
@@ -20,51 +18,86 @@
  * 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 <unistd.h>
+/* Kernel headers before 2.1.mumble need this on the Alpha to get
+   _syscall* defined.  */
+#define __LIBRARY__
 #include <sys/syscall.h>
-#include <linux/unistd.h>
-
+#if __GNU_LIBRARY__ < 5
+/* This is needed for libc5 */
+#include <asm/unistd.h>
+#endif
 #include "libbb.h"
 
+int sysfs( int option, unsigned int fs_index, char * buf)
+{
+       return(syscall(__NR_sysfs, option, fs_index, buf));
+}
 
-_syscall1(int, sysinfo, struct sysinfo *, info);
+int pivot_root(const char * new_root,const char * put_old)
+{
+#ifndef __NR_pivot_root
+#warning This kernel does not support the pivot_root syscall
+#warning -> The pivot_root system call is being stubbed out...
+    /* 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.
+     */
+    bb_error_msg("\n\nTo make this application work, you will need to recompile\n"
+           "BusyBox with a kernel supporting the pivot_root system call.\n");
+    errno=ENOSYS;
+    return -1;
+#else
+    return(syscall(__NR_pivot_root, new_root, put_old));
+#endif
+}
 
-/* 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);
 
-#ifndef __NR_umount2
-# warning This kernel does not support the umount2 syscall
-# warning The umount2 system call is being stubbed out...
-int umount2(const char * special_file, int flags)
+
+#if __GNU_LIBRARY__ < 5 || ((__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1))
+
+/* These syscalls are not included as part of libc5 */
+int bdflush(int func, int data)
 {
-       /* BusyBox was compiled against a kernel that did not support
-        *  the umount2 system call.  To make this application work,
-        *  you will need to recompile with a kernel supporting the
-        *  umount2 system call.
-        */
-       fprintf(stderr, "\n\nTo make this application work, you will need to recompile\n");
-       fprintf(stderr, "with a kernel supporting the umount2 system call. -Erik\n\n");
-       errno=ENOSYS;
-       return -1;
+    return(syscall(__NR_bdflush, func, data));
+}
+
+#ifndef __alpha__
+# define __NR_klogctl __NR_syslog
+int klogctl(int type, char *b, int len)
+{
+    return(syscall(__NR_klogctl, type, b, len));
 }
-# else
-extern _syscall2(int, umount2, const char *, special_file, int, flags);
 #endif
 
-#ifndef __NR_query_module
-static const int __NR_query_module = 167;
+
+int umount2(const char * special_file, int flags)
+{
+#ifndef __NR_pivot_root
+#warning This kernel does not support the umount2 syscall
+#warning -> The umount2 system call is being stubbed out...
+    /* BusyBox was compiled against a kernel that did not support
+     *  the umount2 system call.  To make this application work,
+     *  you will need to recompile with a kernel supporting the
+     *  umount2 system call.
+     */
+    bb_error_msg("\n\nTo make this application work, you will need to recompile\n"
+           "BusyBox with a kernel supporting the umount2 system call.\n");
+    errno=ENOSYS;
+    return -1;
+#else
+    return(syscall(__NR_umount2, special_file, flags));
 #endif
-_syscall5(int, query_module, const char *, name, int, which,
-               void *, buf, size_t, bufsize, size_t*, ret);
+}
+
+
+#endif /* __GNU_LIBRARY__ < 5 */
+
 
 /* END CODE */
 /*