5 files changed, 19 insertions, 74 deletions
diff --git a/src/constraint_handler.c b/src/constraint_handler.c
index ca4e9d2..450632e 100644
--- a/src/constraint_handler.c
+++ b/src/constraint_handler.c
@@ -1,20 +1,5 @@
 /* constraint_handler.c
- *
- * Copyright 2024 axtlos <axtlos@disroot.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- * SPDX-License-Identifier: LGPL-3.0-only
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 
diff --git a/src/extlib.c b/src/extlib.c
index 107e8b4..ce11709 100644
--- a/src/extlib.c
+++ b/src/extlib.c
@@ -14,7 +14,7 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program. If not, see <https://www.gnu.org/licenses/>.
  *
- * SPDX-License-Identifier: LGPL-3.0-only
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 
@@ -58,20 +58,25 @@ memvcmp (void *str,
   return memcmp (str, str2, n);
 }
 
-void
-fcopy(FILE *f1, FILE *f2)
+size_t
+fcopy (FILE *src, FILE *dst)
 {
   char buffer[BUFSIZ];
-  size_t n;
+  size_t n, copied = 0;
+
+  if (src == NULL || dst == NULL)
+    return -1;
 
   while ((n = fread (buffer, sizeof (char), sizeof (buffer), f1)) > 0)
   {
     if (fwrite (buffer, sizeof (char), n, f2) != n) {
       fprintf (stderr, "Failed to copy data");
-      return;
+      return -1;
     }
     fflush (f2);
+    copied += n;
   }
+  return copied;
 }
 
 int
diff --git a/src/extlib.h b/src/extlib.h
index fc7a3d2..5264195 100644
--- a/src/extlib.h
+++ b/src/extlib.h
@@ -1,20 +1,5 @@
-/* extlib.h
- *
- * Copyright 2024 axtlos <axtlos@disroot.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- * SPDX-License-Identifier: LGPL-3.0-only
+/* extlib.c
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <stdlib.h>
@@ -52,8 +37,9 @@ void ignore_handler_s (const char *__restrict, void *__restrict, errno_t);
 #endif
 
 
-/// Copy the data of one filestream to another */
-void fcopy(FILE *f1, FILE *f2);
+/// Copy the data of one filestream to another
+/// Returns the amount of bytes copied.
+size_t fcopy(FILE *src, FILE *dst);
 
 #if (_XOPEN_SOURCE == 500)
 /// Recursively remove a directory pathname.
@@ -73,6 +59,6 @@ char *strupr(char *s);
 /// Trim spaces from a string
 char *trim (char *s, int *rem_front, int *rem_back);
 
-/// Match string old and replace it with string replace
+/// Match string s for old and replace it with string replace
 char *replace_str (char *s, char *old, char *replace);
 
diff --git a/src/extstring.c b/src/extstring.c
index 477f5f7..8b82bb3 100644
--- a/src/extstring.c
+++ b/src/extstring.c
@@ -1,20 +1,5 @@
 /* extstring.c
- *
- * Copyright 2024 axtlos <axtlos@disroot.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- * SPDX-License-Identifier: LGPL-3.0-only
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #define USE_SECURE_MEM
diff --git a/src/memset_s.c b/src/memset_s.c
index deda5d7..dbe26ca 100644
--- a/src/memset_s.c
+++ b/src/memset_s.c
@@ -1,23 +1,7 @@
 /* memset_s.c
- *
- * Copyright 2024 axtlos <axtlos@disroot.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- * SPDX-License-Identifier: LGPL-3.0-only
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
-
 #define __STDC_WANT_LIB_EXT1__ 1
 #include "extlib.h"
 #include <errno.h>