file: implemented F_DUPFD_CLOEXEC and F_DUPFD_CLOFORK

lux-operating-system · Jan 6, 2025 · 5809902 · 5809902
1 parent e7bb723
commit 5809902
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/src/file.c b/src/file.c
@@ -232,6 +232,11 @@ int fcntl(Thread *t, int fd, int cmd, uintptr_t arg) {
 
     switch(cmd) {
     case F_DUPFD:
+    case F_DUPFD_CLOEXEC:
+    case F_DUPFD_CLOFORK:
+        if(((int) arg) < 0 || ((int)arg) >= MAX_IO_DESCRIPTORS)
+            return -EBADF;
+
         IODescriptor *iod = NULL;
         int dupfd = openIO(p, (void **) &iod);
         if(dupfd < 0) return dupfd;
@@ -252,6 +257,10 @@ int fcntl(Thread *t, int fd, int cmd, uintptr_t arg) {
             socket->refCount++;
         }
 
+        iod->flags &= ~(FD_CLOEXEC | FD_CLOFORK);
+        if(cmd == F_DUPFD_CLOEXEC) iod->flags |= FD_CLOEXEC;
+        else if(cmd == F_DUPFD_CLOFORK) iod->flags |= FD_CLOFORK;
+
         return dupfd;
 
     case F_GETFD:

diff --git a/src/include/kernel/file.h b/src/include/kernel/file.h
@@ -34,6 +34,8 @@
 #define F_SETLKW                8
 #define F_GETOWN                9
 #define F_SETOWN                10
+#define F_DUPFD_CLOEXEC         11
+#define F_DUPFD_CLOFORK         12
 
 /* fcntl() flags */
 #define FD_CLOEXEC              (O_CLOEXEC)