Initial commit

kapitel13/mychown-felhantering-ex1.c

@@ -0,0 +1,42 @@
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+int main(int argc, char *argv[])
+{
+    uid_t uid;
+    gid_t gid;
+
+    if (argc != 4)
+    {
+        fprintf(stderr, "Usage: %s <file> <uid> <gid>\n", argv[0]);
+        return 1;
+    }
+
+    uid = (uid_t)atoi(argv[2]);
+    gid = (gid_t)atoi(argv[3]);
+    
+    if (chown(argv[1], uid, gid) == -1)
+    {
+        switch (errno)
+        {
+        case EPERM:
+            fprintf(stderr, "Operation not permitted\n");
+            break;
+        case ENOENT:
+            fprintf(stderr, "No such file or directory\n");
+            break;
+        case ENAMETOOLONG:
+            fprintf(stderr, "Filename too long\n");
+            break;
+        default:
+            fprintf(stderr, "Unknown error\n");
+            break;
+        }
+        return 1;
+    }
+
+    return 0;
+}