From d91f5e82634dbb57346d78c2588be34059199e04 Mon Sep 17 00:00:00 2001
From: Andrei Lascu <andrei.lascu@kcl.ac.uk>
Date: Mon, 22 Apr 2024 11:58:14 +0100
Subject: [PATCH] Fix `syscall` calls

Use named constants instead of just integers
---
 tests/simple_fopen.c          | 5 +++--
 tests/simple_syscall_getpid.c | 3 ++-
 tests/simple_syscall_write.c  | 3 ++-
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/tests/simple_fopen.c b/tests/simple_fopen.c
index c123458..6409763 100644
--- a/tests/simple_fopen.c
+++ b/tests/simple_fopen.c
@@ -2,6 +2,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 void
@@ -18,12 +19,12 @@ by_fopen()
 void
 by_syscall()
 {
-    int fd = syscall(5, "tmp", O_CREAT); // open
+    int fd = syscall(SYS_open, "tmp", O_CREAT); // open
     if (fd == -1)
     {
         err(1, "Error in open: ");
     }
-    syscall(6, fd); // close
+    syscall(SYS_close, fd); // close
 }
 
 void
diff --git a/tests/simple_syscall_getpid.c b/tests/simple_syscall_getpid.c
index 4956dfa..3bae87e 100644
--- a/tests/simple_syscall_getpid.c
+++ b/tests/simple_syscall_getpid.c
@@ -1,10 +1,11 @@
 #include <assert.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 int
 main(void)
 {
-    long int sc_pid = syscall(20);
+    long int sc_pid = syscall(SYS_getpid);
     pid_t pid = getpid();
     assert(pid == sc_pid);
     return 0;
diff --git a/tests/simple_syscall_write.c b/tests/simple_syscall_write.c
index 119cd45..44d35f2 100644
--- a/tests/simple_syscall_write.c
+++ b/tests/simple_syscall_write.c
@@ -1,12 +1,13 @@
 #include <err.h>
 #include <string.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 int
 main(void)
 {
     char *buf = "Hello World!\n";
-    long int sc_write = syscall(4, STDOUT_FILENO, buf, strlen(buf));
+    long int sc_write = syscall(SYS_write, STDOUT_FILENO, buf, strlen(buf));
     if (sc_write == -1)
     {
         err(1, "Error calling `syscall`:");