[PATCH 08/11] bsd-user: Implement rmdir and undocumented -_getcwd

[Warner Losh <imp@bsdimp.com>]

Implemenet rmdir and __getcwd. Declare __getcwd as extern because
there's no installed FreeBSD header that has it. It's used internally by
libc, which doesn't provide an external declaration, but does export the
symbol.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/bsd-file.h           | 30 ++++++++++++++++++++++++++++++
 bsd-user/freebsd/os-syscall.c |  8 ++++++++
 2 files changed, 38 insertions(+)

diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index 35036364ad8..500d6ba78b9 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -55,6 +55,7 @@ extern struct iovec *lock_iovec(int type, abi_ulong target_addr, int count,
         int copy);
 extern void unlock_iovec(struct iovec *vec, abi_ulong target_addr, int count,
         int copy);
+extern int __getcwd(char *path, size_t len);
 
 int safe_open(const char *path, int flags, mode_t mode);
 int safe_openat(int fd, const char *path, int flags, mode_t mode);
@@ -461,4 +462,33 @@ static abi_long do_bsd_mkdirat(abi_long arg1, abi_long arg2,
     return ret;
 }
 
+/* rmdir(2) */
+static abi_long do_bsd_rmdir(abi_long arg1)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(rmdir(p)); /* XXX path(p)? */
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* undocumented __getcwd(char *buf, size_t len)  system call */
+static abi_long do_bsd___getcwd(abi_long arg1, abi_long arg2)
+{
+    abi_long ret;
+    void *p;
+
+    p = lock_user(VERIFY_WRITE, arg1, arg2, 0);
+    if (p == NULL) {
+        return -TARGET_EFAULT;
+    }
+    ret = __getcwd(p, arg2);
+    unlock_user(p, arg1, ret == 0 ? strlen(p) + 1 : 0);
+
+    return get_errno(ret);
+}
+
 #endif /* BSD_FILE_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 9381ddb5be1..e28a566d6c3 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -341,6 +341,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_mkdirat(arg1, arg2, arg3);
         break;
 
+    case TARGET_FREEBSD_NR_rmdir: /* rmdir(2) (XXX no rmdirat()?) */
+        ret = do_bsd_rmdir(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR___getcwd: /* undocumented __getcwd() */
+        ret = do_bsd___getcwd(arg1, arg2);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;
-- 
2.33.1