1 files changed, 64 insertions, 0 deletions
diff --git a/package/toolbox/src/src/dmesg.c b/package/toolbox/src/src/dmesg.c
new file mode 100644
index 000000000..9fac63287
--- /dev/null
+++ b/package/toolbox/src/src/dmesg.c
@@ -0,0 +1,64 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/klog.h>
+#include <string.h>
+
+#define FALLBACK_KLOG_BUF_SHIFT	17	/* CONFIG_LOG_BUF_SHIFT from our kernel */
+#define FALLBACK_KLOG_BUF_LEN	(1 << FALLBACK_KLOG_BUF_SHIFT)
+
+#ifndef KLOG_SIZE_BUFFER
+#define KLOG_READ_ALL      3
+#define KLOG_READ_CLEAR    4
+#define KLOG_SIZE_BUFFER   10
+#endif
+
+int main(int argc, char **argv)
+{
+    char *buffer;
+    char *p;
+    ssize_t ret;
+    int n, op, klog_buf_len;
+
+    klog_buf_len = klogctl(KLOG_SIZE_BUFFER, 0, 0);
+
+    if (klog_buf_len <= 0) {
+        klog_buf_len = FALLBACK_KLOG_BUF_LEN;
+    }
+
+    buffer = (char *)malloc(klog_buf_len + 1);
+
+    if (!buffer) {
+        perror("malloc");
+        return EXIT_FAILURE;
+    }
+
+    p = buffer;
+
+    if((argc == 2) && (!strcmp(argv[1],"-c"))) {
+        op = KLOG_READ_CLEAR;
+    } else {
+        op = KLOG_READ_ALL;
+    }
+
+    n = klogctl(op, buffer, klog_buf_len);
+    if (n < 0) {
+        perror("klogctl");
+        return EXIT_FAILURE;
+    }
+    buffer[n] = '\0';
+
+    while((ret = write(STDOUT_FILENO, p, n))) {
+        if (ret == -1) {
+	    if (errno == EINTR)
+                continue;
+	    perror("write");
+	    return EXIT_FAILURE;
+	}
+	p += ret;
+	n -= ret;
+    }
+
+    return 0;
+}