fix printf warning

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

diff --git a/libbb/module_syscalls.c b/libbb/module_syscalls.c
index 6b6ebed06a2f5e62475947b8f4983689efc0a7ea..a2ff5284ac35731c3643e2ffac4f71e2e94ef4d4 100644 (file)
--- a/libbb/module_syscalls.c
+++ b/libbb/module_syscalls.c
@@ -2,7 +2,7 @@
 /*
  * some system calls possibly missing from libc
  *
- * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 1999-2004 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
@@ -23,26 +23,35 @@
 #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>
-#if __GNU_LIBRARY__ < 5
-/* This is needed for libc5 */
-#include <asm/unistd.h>
-#endif
 #include "libbb.h"
 
+/* uClibc always supplies (possibly ENOSYS) versions of these functions. */
+#ifndef __UCLIBC__
 
-#if __GNU_LIBRARY__ < 5 || ((__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1))
-/* These syscalls are not included as part of libc5 */
+/* These syscalls are not included in very old glibc versions */
 int delete_module(const char *name)
 {
+#ifndef __NR_delete_module
+#warning This kernel does not support the delete_module syscall
+#warning -> The delete_module system call is being stubbed out...
+    errno=ENOSYS;
+    return -1;
+#else
     return(syscall(__NR_delete_module, name));
+#endif
 }
+
 int get_kernel_syms(__ptr_t ks)
 {
+#ifndef __NR_get_kernel_syms
+#warning This kernel does not support the get_kernel_syms syscall
+#warning -> The get_kernel_syms system call is being stubbed out...
+    errno=ENOSYS;
+    return -1;
+#else
     return(syscall(__NR_get_kernel_syms, ks));
+#endif
 }
 
 /* This may have 5 arguments (for old 2.0 kernels) or 2 arguments
@@ -50,7 +59,14 @@ int get_kernel_syms(__ptr_t ks)
  * and let the kernel cope with whatever it gets.  Its good at that. */
 int init_module(void *first, void *second, void *third, void *fourth, void *fifth)
 {
+#ifndef __NR_init_module
+#warning This kernel does not support the init_module syscall
+#warning -> The init_module system call is being stubbed out...
+    errno=ENOSYS;
+    return -1;
+#else
     return(syscall(__NR_init_module, first, second, third, fourth, fifth));
+#endif
 }
 
 int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret)
@@ -70,6 +86,12 @@ int query_module(const char *name, int which, void *buf, size_t bufsize, size_t
 /* Jump through hoops to fixup error return codes */
 unsigned long create_module(const char *name, size_t size)
 {
+#ifndef __NR_create_module
+#warning This kernel does not support the create_module syscall
+#warning -> The create_module system call is being stubbed out...
+    errno=ENOSYS;
+    return -1;
+#else
     long ret = syscall(__NR_create_module, name, size);
 
     if (ret == -1 && errno > 125) {
@@ -77,10 +99,11 @@ unsigned long create_module(const char *name, size_t size)
        errno = 0;
     }
     return ret;
+#endif
 }
 
-#endif /* __GNU_LIBRARY__ < 5 */
 
+#endif /* __UCLIBC__ */
 
 /* END CODE */
 /*