Implement nohup.

1 files changed, 42 insertions, 0 deletions

diff --git a/toys/nohup.c b/toys/nohup.c
new file mode 100644
index 00000000..ab59c1e2
--- /dev/null
+++ b/toys/nohup.c
@@ -0,0 +1,42 @@
+/* vi: set sw=4 ts=4:
+ *
+ * nohup.c - run commandline with SIGHUP blocked.
+ *
+ * Copyright 2011 Rob Landley <rob@landley.net>
+ *
+ * See http://opengroup.org/onlinepubs/9699919799/utilities/nohup.html
+
+USE_NOHUP(NEWTOY(nohup, "<1", TOYFLAG_USR|TOYFLAG_BIN))
+
+config NOHUP
+	bool "nohup"
+	default y
+	help
+	  usage: nohup COMMAND [ARGS...]
+
+	  Run a command that survives the end of its terminal.
+	  If stdin is a tty, redirect from /dev/null
+	  If stdout is a tty, redirect to file "nohup.out"
+*/
+
+#include "toys.h"
+
+void nohup_main(void)
+{
+	signal(SIGHUP, SIG_IGN);
+	if (ttyname(1)) {
+		close(1);
+		if (-1 == open("nohup.out", O_CREAT|O_APPEND|O_WRONLY,
+				S_IRUSR|S_IWUSR ))
+		{
+			char *temp = getenv("HOME");
+			temp = xmsprintf("%s/%s", temp ? temp : "", "nohup.out");
+			xcreate(temp, O_CREAT|O_APPEND|O_WRONLY, S_IRUSR|S_IWUSR);
+		}
+	}
+	if (ttyname(0)) {
+		close(0);
+		open("/dev/null", O_RDONLY);
+	}
+	xexec(toys.optargs);
+}