feat: file descriptor and proper stdio

1 files changed, 17 insertions, 17 deletions

diff --git a/user/save.c b/user/save.c
index b3664f4..48e1930 100644
--- a/user/save.c
+++ b/user/save.c
@@ -2,23 +2,30 @@
 
 void _start(const char* arg, unsigned long arglen)
 {
-    if (arglen == 0 || arglen >= 64)
+    if (arglen == 0 || arglen >= 120)
     {
         put("usage: run save <path>\n");
         sys_exit(1);
     }
 
-    char name[64];
+    char name[128];
     for (unsigned long i = 0; i < arglen; i++)
         name[i] = arg[i];
     name[arglen] = 0;
 
+    long fd = sys_open(name, O_CREAT | O_TRUNC | O_WRONLY);
+    if (fd < 0)
+    {
+        put("save: ");
+        put(name);
+        put(": cannot open\n");
+        sys_exit(1);
+    }
+
     put("saving to ");
     put(name);
     put(" -- type lines, a single . saves\n");
 
-    char buffer[4096];
-    int length = 0;
     for (;;)
     {
         char line[256];
@@ -26,20 +33,13 @@ void _start(const char* arg, unsigned long arglen)
         put("\n");
         if (n == 1 && line[0] == '.')
             break;
-        for (int i = 0; i < n && length < 4000; i++)
-            buffer[length++] = line[i];
-        if (length < 4000)
-            buffer[length++] = '\n';
+        sys_write(fd, line, (unsigned long)n);
+        sys_write(fd, "\n", 1);
     }
 
-    if (sys_fs_write(name, buffer, (unsigned long)length))
-    {
-        put("saved ");
-        put(name);
-        put("\n");
-    }
-    else
-        put("write failed\n");
-
+    sys_close(fd);
+    put("saved ");
+    put(name);
+    put("\n");
     sys_exit(0);
 }