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

[Thayne Harbaugh <thayne@c2.net>]

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

This patch adds the fchmodat syscall to linux-user.

[-- Attachment #2: 33_fchmodat.patch --]
[-- Type: text/x-patch, Size: 1975 bytes --]

Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c	2007-09-19 06:27:29.000000000 -0600
+++ qemu/linux-user/syscall.c	2007-09-19 06:28:02.000000000 -0600
@@ -151,6 +151,7 @@
 
 
 #define __NR_sys_uname __NR_uname
+#define __NR_sys_fchmodat __NR_fchmodat
 #define __NR_sys_fchownat __NR_fchownat
 #define __NR_sys_futimesat __NR_futimesat
 #define __NR_sys_getcwd1 __NR_getcwd
@@ -182,6 +183,10 @@
 }
 #endif
 _syscall1(int,sys_uname,struct new_utsname *,buf)
+#if defined(TARGET_NR_fchmodat) && defined(__NR_fchmodat)
+_syscall4(int,sys_fchmodat,int,dirfd,const char *,pathname,
+          mode_t,mode,int,flags)
+#endif
 #if defined(TARGET_NR_fchownat) && defined(__NR_fchownat)
 _syscall5(int,sys_fchownat,int,dirfd,const char *,pathname,
           uid_t,owner,gid_t,group,int,flags)
@@ -3715,6 +3720,21 @@
     case TARGET_NR_fchmod:
         ret = get_errno(fchmod(arg1, arg2));
         break;
+#if defined(TARGET_NR_fchmodat) && defined(__NR_fchmodat)
+    case TARGET_NR_fchmodat:
+        if (!arg2) {
+            ret = -EFAULT;
+            goto fail;
+        }
+        p = lock_user_string(arg2);
+        if (!access_ok(VERIFY_READ, p, 1))
+            ret = -EFAULT;
+        else
+            ret = get_errno(sys_fchmodat(arg1, p, arg3, arg4));
+        if (p)
+            unlock_user(p, arg2, 0);
+        break;
+#endif
     case TARGET_NR_getpriority:
         ret = get_errno(getpriority(arg1, arg2));
         break;
Index: qemu/linux-user/arm/syscall_nr.h
===================================================================
--- qemu.orig/linux-user/arm/syscall_nr.h	2007-09-19 06:26:57.000000000 -0600
+++ qemu/linux-user/arm/syscall_nr.h	2007-09-19 06:27:37.000000000 -0600
@@ -335,4 +335,5 @@
 #define TARGET_NR_linkat			330
 #define TARGET_NR_symlinkat			331
 #define TARGET_NR_readlinkat			332
+#define TARGET_NR_fchmodat			333
 #define TARGET_NR_utimensat			348