[PATCH v4 16/28] bsd-user: Implement get/set[resuid/resgid/sid] and issetugid.

[Karim Taha]

From: Stacey Son <sson@FreeBSD.org>

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/bsd-proc.h           | 76 +++++++++++++++++++++++++++++++++++
 bsd-user/freebsd/os-syscall.c | 28 +++++++++++++
 2 files changed, 104 insertions(+)

diff --git a/bsd-user/bsd-proc.h b/bsd-user/bsd-proc.h
index 6ff07c0ac3..a5f301c72f 100644
--- a/bsd-user/bsd-proc.h
+++ b/bsd-user/bsd-proc.h
@@ -286,4 +286,80 @@ static inline abi_long do_bsd_setregid(abi_long arg1, 
abi_long arg2)
     return get_errno(setregid(arg1, arg2));
 }
 
+/* setresgid(2) */
+static inline abi_long do_bsd_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
+{
+    return get_errno(setresgid(rgid, egid, sgid));
+}
+
+/* setresuid(2) */
+static inline abi_long do_bsd_setresuid(uid_t ruid, uid_t euid, uid_t suid)
+{
+    return get_errno(setresuid(ruid, euid, suid));
+}
+
+/* getresuid(2) */
+static inline abi_long do_bsd_getresuid(abi_ulong arg1, abi_ulong arg2,
+        abi_ulong arg3)
+{
+    abi_long ret;
+    uid_t ruid, euid, suid;
+
+    ret = get_errno(getresuid(&ruid, &euid, &suid));
+    if (is_error(ret)) {
+            return ret;
+    }
+    if (put_user_s32(ruid, arg1)) {
+        return -TARGET_EFAULT;
+    }
+    if (put_user_s32(euid, arg2)) {
+        return -TARGET_EFAULT;
+    }
+    if (put_user_s32(suid, arg3)) {
+        return -TARGET_EFAULT;
+    }
+    return ret;
+}
+
+/* getresgid(2) */
+static inline abi_long do_bsd_getresgid(abi_ulong arg1, abi_ulong arg2,
+                                        abi_ulong arg3)
+{
+    abi_long ret;
+    uid_t ruid, euid, suid;
+
+    ret = get_errno(getresgid(&ruid, &euid, &suid));
+    if (is_error(ret)) {
+            return ret;
+    }
+    if (put_user_s32(ruid, arg1)) {
+        return -TARGET_EFAULT;
+    }
+    if (put_user_s32(euid, arg2)) {
+        return -TARGET_EFAULT;
+    }
+    if (put_user_s32(suid, arg3)) {
+        return -TARGET_EFAULT;
+    }
+    return ret;
+}
+
+/* getsid(2) */
+static inline abi_long do_bsd_getsid(abi_long arg1)
+{
+    return get_errno(getsid(arg1));
+}
+
+/* setsid(2) */
+static inline abi_long do_bsd_setsid(void)
+{
+    return get_errno(setsid());
+}
+
+/* issetugid(2) */
+static inline abi_long do_bsd_issetugid(void)
+{
+    return get_errno(issetugid());
+}
+
 #endif /* !BSD_PROC_H_ */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 7565e69e76..7b51f4f16e 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -315,6 +315,34 @@ static abi_long freebsd_syscall(void *cpu_env, int num, 
abi_long arg1,
         ret = do_bsd_setregid(arg1, arg2);
         break;
 
+    case TARGET_FREEBSD_NR_getresuid: /* getresuid(2) */
+        ret = do_bsd_getresuid(arg1, arg2, arg3);
+        break;
+
+    case TARGET_FREEBSD_NR_getresgid: /* getresgid(2) */
+        ret = do_bsd_getresgid(arg1, arg2, arg3);
+        break;
+
+    case TARGET_FREEBSD_NR_setresuid: /* setresuid(2) */
+        ret = do_bsd_setresuid(arg1, arg2, arg3);
+        break;
+
+    case TARGET_FREEBSD_NR_setresgid: /* setresgid(2) */
+        ret = do_bsd_setresgid(arg1, arg2, arg3);
+        break;
+
+    case TARGET_FREEBSD_NR_getsid: /* getsid(2) */
+        ret = do_bsd_getsid(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR_setsid: /* setsid(2) */
+        ret = do_bsd_setsid();
+        break;
+
+    case TARGET_FREEBSD_NR_issetugid: /* issetugid(2) */
+        ret = do_bsd_issetugid();
+        break;
+
 
         /*
          * File system calls.
-- 
2.42.0