[Qemu-devel] Re: [PATCH] linux-user renameat() syscall

[Thayne Harbaugh <thayne@c2.net>]

[-- Attachment #1: Type: text/plain, Size: 52 bytes --]

This patch adds the renameat syscall to linux-user.

[-- Attachment #2: 29_renameat.patch --]
[-- Type: text/x-patch, Size: 2387 bytes --]

Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c	2007-09-19 06:23:52.000000000 -0600
+++ qemu/linux-user/syscall.c	2007-09-19 06:24:47.000000000 -0600
@@ -159,6 +159,7 @@
 #define __NR_sys_mkdirat __NR_mkdirat
 #define __NR_sys_mknodat __NR_mknodat
 #define __NR_sys_openat __NR_openat
+#define __NR_sys_renameat __NR_renameat
 #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
 #define __NR_sys_syslog __NR_syslog
 #define __NR_sys_tgkill __NR_tgkill
@@ -203,6 +204,10 @@
 #if defined(TARGET_NR_openat) && defined(__NR_openat)
 _syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)
 #endif
+#if defined(TARGET_NR_renameat) && defined(__NR_renameat)
+_syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath,
+          int,newdirfd,const char *,newpath)
+#endif
 _syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)
 _syscall3(int,sys_syslog,int,type,char*,bufp,int,len)
 #if defined(TARGET_NR_tgkill) && defined(__NR_tgkill)
@@ -3016,6 +3021,28 @@
             unlock_user(p, arg1, 0);
         }
         break;
+#if defined(TARGET_NR_renameat) && defined(__NR_renameat)
+    case TARGET_NR_renameat:
+        if (!arg2 || !arg4) {
+            ret = -EFAULT;
+	    goto fail;
+        }
+        {
+            void *p2 = NULL;
+            p  = lock_user_string(arg2);
+            p2 = lock_user_string(arg4);
+            if (!access_ok(VERIFY_READ, p, 1)
+                || !access_ok(VERIFY_READ, p2, 1))
+                ret = -EFAULT;
+            else
+                ret = get_errno(sys_renameat(arg1, p, arg3, p2));
+            if (p2)
+                unlock_user(p2, arg4, 0);
+            if (p)
+                unlock_user(p, arg2, 0);
+        }
+        break;
+#endif
     case TARGET_NR_mkdir:
         p = lock_user_string(arg1);
         ret = get_errno(mkdir(p, arg2));
Index: qemu/linux-user/arm/syscall_nr.h
===================================================================
--- qemu.orig/linux-user/arm/syscall_nr.h	2007-09-19 06:23:07.000000000 -0600
+++ qemu/linux-user/arm/syscall_nr.h	2007-09-19 06:24:10.000000000 -0600
@@ -331,4 +331,5 @@
 #define TARGET_NR_fchownat			325
 #define TARGET_NR_futimesat			326
 #define TARGET_NR_unlinkat			328
+#define TARGET_NR_renameat			329
 #define TARGET_NR_utimensat			348