Add docs and nohup/unlink utitiliesHEADmaster

1 files changed, 47 insertions, 0 deletions

diff --git a/bin/nohup/nohup.c b/bin/nohup/nohup.c
new file mode 100644
index 00000000..8a6171eb
--- /dev/null
+++ b/bin/nohup/nohup.c
@@ -0,0 +1,47 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+	int fildes;
+
+	if (argc < 2) {
+		write(STDOUT_FILENO, "nohup utility [argument...]\n", 29);
+		return 1;
+	}
+
+	if (signal(SIGHUP, SIG_IGN) == SIG_ERR) {
+		perror("nohup: signal");
+		return 1;
+	}
+
+	if (isatty(STDOUT_FILENO)) {
+		fildes = open("nohup.out", O_WRONLY | O_APPEND | O_CREAT);
+		if (fildes < 0) {
+			perror("nohup: open");
+			return 1;
+		}
+
+		if (dup2(fildes, STDOUT_FILENO) < 0) {
+			perror("nohup: dup2");
+			return 1;
+		}
+
+		close(fildes);
+	}
+
+	if (isatty(STDERR_FILENO)) {
+		if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) {
+			perror("nohup: dup2");
+			return 1;
+		}
+	}
+
+	execvp(argv[0], argv);
+	perror("nohup: execvp");
+	return 127 + (errno == ENOENT);
+}