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linux-user/syscall.c: Implement f and l versions of set/get/removexattr

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Implement the f and l versions (operate on fd, don't follow links)
of the setxattr, getxattr and removexattr syscalls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2011-12-14 15:37:18 +00:00 committed by Riku Voipio
parent e3c33ec6b0
commit 30297b55f7
1 changed files with 70 additions and 9 deletions
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79
linux-user/syscall.c
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@ -7796,18 +7796,13 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef CONFIG_ATTR
#ifdef TARGET_NR_setxattr
case TARGET_NR_lsetxattr:
case TARGET_NR_fsetxattr:
case TARGET_NR_lgetxattr:
case TARGET_NR_fgetxattr:
case TARGET_NR_listxattr:
case TARGET_NR_llistxattr:
case TARGET_NR_flistxattr:
case TARGET_NR_lremovexattr:
case TARGET_NR_fremovexattr:
ret = -TARGET_EOPNOTSUPP;
break;
case TARGET_NR_setxattr:
case TARGET_NR_lsetxattr:
{
void *p, *n, *v = 0;
if (arg3) {
@ -7820,7 +7815,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
p = lock_user_string(arg1);
n = lock_user_string(arg2);
if (p && n) {
ret = get_errno(setxattr(p, n, v, arg4, arg5));
if (num == TARGET_NR_setxattr) {
ret = get_errno(setxattr(p, n, v, arg4, arg5));
} else {
ret = get_errno(lsetxattr(p, n, v, arg4, arg5));
}
} else {
ret = -TARGET_EFAULT;
}
@ -7829,7 +7828,28 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user(v, arg3, 0);
}
break;
case TARGET_NR_fsetxattr:
{
void *n, *v = 0;
if (arg3) {
v = lock_user(VERIFY_READ, arg3, arg4, 1);
if (!v) {
ret = -TARGET_EFAULT;
break;
}
}
n = lock_user_string(arg2);
if (n) {
ret = get_errno(fsetxattr(arg1, n, v, arg4, arg5));
} else {
ret = -TARGET_EFAULT;
}
unlock_user(n, arg2, 0);
unlock_user(v, arg3, 0);
}
break;
case TARGET_NR_getxattr:
case TARGET_NR_lgetxattr:
{
void *p, *n, *v = 0;
if (arg3) {
@ -7842,7 +7862,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
p = lock_user_string(arg1);
n = lock_user_string(arg2);
if (p && n) {
ret = get_errno(getxattr(p, n, v, arg4));
if (num == TARGET_NR_getxattr) {
ret = get_errno(getxattr(p, n, v, arg4));
} else {
ret = get_errno(lgetxattr(p, n, v, arg4));
}
} else {
ret = -TARGET_EFAULT;
}
@ -7851,13 +7875,38 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user(v, arg3, arg4);
}
break;
case TARGET_NR_fgetxattr:
{
void *n, *v = 0;
if (arg3) {
v = lock_user(VERIFY_WRITE, arg3, arg4, 0);
if (!v) {
ret = -TARGET_EFAULT;
break;
}
}
n = lock_user_string(arg2);
if (n) {
ret = get_errno(fgetxattr(arg1, n, v, arg4));
} else {
ret = -TARGET_EFAULT;
}
unlock_user(n, arg2, 0);
unlock_user(v, arg3, arg4);
}
break;
case TARGET_NR_removexattr:
case TARGET_NR_lremovexattr:
{
void *p, *n;
p = lock_user_string(arg1);
n = lock_user_string(arg2);
if (p && n) {
ret = get_errno(removexattr(p, n));
if (num == TARGET_NR_removexattr) {
ret = get_errno(removexattr(p, n));
} else {
ret = get_errno(lremovexattr(p, n));
}
} else {
ret = -TARGET_EFAULT;
}
@ -7865,6 +7914,18 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user(n, arg2, 0);
}
break;
case TARGET_NR_fremovexattr:
{
void *n;
n = lock_user_string(arg2);
if (n) {
ret = get_errno(fremovexattr(arg1, n));
} else {
ret = -TARGET_EFAULT;
}
unlock_user(n, arg2, 0);
}
break;
#endif
#endif /* CONFIG_ATTR */
#ifdef TARGET_NR_set_thread_area