1 files changed, 73 insertions, 0 deletions

diff --git a/arch/um/kernel/exitcode.c b/arch/um/kernel/exitcode.c
new file mode 100644
index 000000000000..0ea87f24b36f
--- /dev/null
+++ b/arch/um/kernel/exitcode.c
@@ -0,0 +1,73 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/init.h"
+#include "linux/ctype.h"
+#include "linux/proc_fs.h"
+#include "asm/uaccess.h"
+
+/* If read and write race, the read will still atomically read a valid
+ * value.
+ */
+int uml_exitcode = 0;
+
+static int read_proc_exitcode(char *page, char **start, off_t off,
+                              int count, int *eof, void *data)
+{
+        int len;
+
+        len = sprintf(page, "%d\n", uml_exitcode);
+        len -= off;
+        if(len <= off+count) *eof = 1;
+        *start = page + off;
+        if(len > count) len = count;
+        if(len < 0) len = 0;
+        return(len);
+}
+
+static int write_proc_exitcode(struct file *file, const char __user *buffer,
+                               unsigned long count, void *data)
+{
+        char *end, buf[sizeof("nnnnn\0")];
+        int tmp;
+
+        if(copy_from_user(buf, buffer, count))
+                return(-EFAULT);
+        tmp = simple_strtol(buf, &end, 0);
+        if((*end != '\0') && !isspace(*end))
+                return(-EINVAL);
+        uml_exitcode = tmp;
+        return(count);
+}
+
+static int make_proc_exitcode(void)
+{
+        struct proc_dir_entry *ent;
+
+        ent = create_proc_entry("exitcode", 0600, &proc_root);
+        if(ent == NULL){
+                printk("make_proc_exitcode : Failed to register "
+                       "/proc/exitcode\n");
+                return(0);
+        }
+
+        ent->read_proc = read_proc_exitcode;
+        ent->write_proc = write_proc_exitcode;
+        
+        return(0);
+}
+
+__initcall(make_proc_exitcode);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */