1 files changed, 77 insertions, 0 deletions
diff --git a/usr.bin/readcore/readcore.c b/usr.bin/readcore/readcore.c
new file mode 100644
index 0000000..f403196
--- /dev/null
+++ b/usr.bin/readcore/readcore.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include "crc32.h"
+#include "frame.h"
+#include "core.h"
+
+static void
+parse_core(const struct core *dump)
+{
+    uint32_t checksum;
+
+    printf("-- CORE DUMP OF PID %d CRASH -- \n", dump->pid);
+    printf("Faulting address: %p\n", dump->fault_addr);
+    core_dumpframe(dump);
+
+    checksum = crc32(dump, sizeof(*dump) - sizeof(checksum));
+    if (checksum != dump->checksum) {
+        printf("!! WARNING: coredump might be corrupt !!\n");
+    }
+}
+
+int
+main(int argc, char **argv)
+{
+    int fd;
+    struct core core;
+
+    if (argc < 2) {
+        printf("usage: readcore <coredump>\n");
+        return -1;
+    }
+
+    fd = open(argv[1], O_RDONLY);
+    if (fd < 2) {
+        printf("readcore: Could not open \"%s\"", argv[1]);
+        return fd;
+    }
+
+    if (read(fd, &core, sizeof(core)) < sizeof(core)) {
+        printf("readcore: bad read()\n");
+        return -1;
+    }
+
+    parse_core(&core);
+    return 0;
+}