aboutsummaryrefslogtreecommitdiff
path: root/arch/um/kernel/exitcode.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/kernel/exitcode.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/um/kernel/exitcode.c')
-rw-r--r--arch/um/kernel/exitcode.c73
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 00000000000..0ea87f24b36
--- /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:
+ */