Add some .mk stubs to impersonate bsk .mk files to make writing our Makefiles easier. libeinfo, librc and rc now have their own seperate directories. More work is needed to tidy this up though.

1 files changed, 258 insertions, 0 deletions

diff --git a/src/rc/rc-logger.c b/src/rc/rc-logger.c
new file mode 100644
index 0000000..675a4d2
--- /dev/null
+++ b/src/rc/rc-logger.c
@@ -0,0 +1,258 @@
+/*
+   rc-logger.c
+   Spawns a logging daemon to capture stdout and stderr so we can log
+   them to a buffer and/or files.
+   */
+
+/* 
+ * Copyright 2007 Roy Marples
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+#ifdef __linux__
+# include <pty.h>
+#else
+# include <libutil.h>
+#endif
+
+#include "einfo.h"
+#include "rc-logger.h"
+#include "rc-misc.h"
+#include "rc.h"
+
+#define LOGFILE RC_SVCDIR "/rc.log"
+#define PERMLOG "/var/log/rc.log"
+#define MOVELOG "mv " LOGFILE " " PERMLOG ".$$.tmp && cat " PERMLOG \
+	".$$.tmp >>" PERMLOG " 2>/dev/null && rm -f " PERMLOG ".$$.tmp"
+
+static int signal_pipe[2] = { -1, -1 };
+static int fd_stdout = -1;
+static int fd_stderr = -1;
+static const char *runlevel = NULL;
+static bool in_escape = false;
+static bool in_term = false;
+
+static char *logbuf = NULL;
+static size_t logbuf_size = 0;
+static size_t logbuf_len = 0;
+
+pid_t rc_logger_pid = -1;
+int rc_logger_tty = -1;
+bool rc_in_logger = false;
+
+static void write_log (int logfd, const char *buffer, size_t bytes)
+{
+	const char *p = buffer;
+
+	while ((size_t) (p - buffer) < bytes) {
+		switch (*p) {
+			case '\r':
+				goto cont;
+			case '\033':
+				in_escape = true;
+				in_term = false;
+				goto cont;
+			case '\n':
+				in_escape = in_term = false;
+				break;
+			case '[':
+				if (in_escape)
+					in_term = true;
+				break;
+		}
+		
+		if (! in_escape) {
+			write (logfd, p++, 1);
+			continue;
+		}
+
+		if (! in_term || isalpha (*p))
+			in_escape = in_term = false;
+cont:
+		p++;
+	}
+}
+
+static void write_time (FILE *f, const char *s)
+{
+	time_t now = time (NULL);
+	struct tm *tm = localtime (&now);
+
+	fprintf (f, "\nrc %s logging %s at %s\n", runlevel, s, asctime (tm));
+	fflush (f);
+}
+
+void rc_logger_close ()
+{
+	if (signal_pipe[1] > -1) {
+		int sig = SIGTERM;
+		write (signal_pipe[1], &sig, sizeof (sig));
+		close (signal_pipe[1]);
+		signal_pipe[1] = -1;
+	}
+
+	if (rc_logger_pid > 0)
+		waitpid (rc_logger_pid, 0, 0);
+
+	if (fd_stdout > -1)
+		dup2 (fd_stdout, STDOUT_FILENO);
+	if (fd_stderr > -1)
+		dup2 (fd_stderr, STDERR_FILENO);
+}
+
+void rc_logger_open (const char *level)
+{
+	int slave_tty;
+	struct termios tt;
+	struct winsize ws;
+	char *buffer;
+	fd_set rset;
+	int s = 0;
+	size_t bytes;
+	int selfd;
+	int i;
+	FILE *log = NULL;
+
+	if (! isatty (STDOUT_FILENO))
+		return;
+
+	if (! rc_conf_yesno ("rc_logger"))
+		return;
+
+	if (pipe (signal_pipe) == -1)
+		eerrorx ("pipe: %s", strerror (errno));
+	for (i = 0; i < 2; i++)
+		if ((s = fcntl (signal_pipe[i], F_GETFD, 0) == -1 ||
+			 fcntl (signal_pipe[i], F_SETFD, s | FD_CLOEXEC) == -1))
+			eerrorx ("fcntl: %s", strerror (errno));
+
+	tcgetattr (STDOUT_FILENO, &tt);
+	ioctl (STDOUT_FILENO, TIOCGWINSZ, &ws);
+
+	/* /dev/pts may not be available yet */
+	if (openpty (&rc_logger_tty, &slave_tty, NULL, &tt, &ws))
+		return;
+
+	rc_logger_pid = fork ();
+	switch (rc_logger_pid) {
+		case -1:
+			eerror ("forkpty: %s", strerror (errno));
+			break;
+		case 0:
+			rc_in_logger = true;
+			close (signal_pipe[1]);
+			signal_pipe[1] = -1;
+
+			runlevel = level;
+			if ((log = fopen (LOGFILE, "a")))
+				write_time (log, "started");
+			else {
+				free (logbuf);
+				logbuf_size = RC_LINEBUFFER * 10;
+				logbuf = xmalloc (sizeof (char) * logbuf_size);
+				logbuf_len = 0;
+			}
+
+			buffer = xmalloc (sizeof (char) * RC_LINEBUFFER);
+			selfd = rc_logger_tty > signal_pipe[0] ? rc_logger_tty : signal_pipe[0];
+			while (1) {
+				FD_ZERO (&rset);
+				FD_SET (rc_logger_tty, &rset);
+				FD_SET (signal_pipe[0], &rset);
+
+				if ((s = select (selfd + 1, &rset, NULL, NULL, NULL)) == -1) {
+					eerror ("select: %s", strerror (errno));
+					break;
+				}
+
+				if (s > 0) {
+					if (FD_ISSET (rc_logger_tty, &rset)) {
+						memset (buffer, 0, RC_LINEBUFFER);
+						bytes = read (rc_logger_tty, buffer, RC_LINEBUFFER);
+						write (STDOUT_FILENO, buffer, bytes);
+
+						if (log)
+							write_log (fileno (log), buffer, bytes);
+						else {
+							if (logbuf_size - logbuf_len < bytes) {
+								logbuf_size += RC_LINEBUFFER * 10;
+								logbuf = xrealloc (logbuf, sizeof (char ) *
+												   logbuf_size);
+							}
+
+							memcpy (logbuf + logbuf_len, buffer, bytes);
+							logbuf_len += bytes;
+						}
+					}
+
+					/* Only SIGTERMS signals come down this pipe */
+					if (FD_ISSET (signal_pipe[0], &rset))
+						break;
+				}
+			}
+			free (buffer);
+			if (logbuf) { 
+				if ((log = fopen (LOGFILE, "a"))) {
+					write_time (log, "started");
+					write_log (fileno (log), logbuf, logbuf_len);
+				}
+				free (logbuf);
+			}
+			if (log) {
+				write_time (log, "stopped");
+				fclose (log);
+			}
+
+			/* Try and cat our new logfile to a more permament location and then
+			 * punt it */
+			system (MOVELOG);
+			
+			exit (0);
+		default:
+			setpgid (rc_logger_pid, 0);
+			fd_stdout = dup (STDOUT_FILENO);
+			fd_stderr = dup (STDERR_FILENO);
+			dup2 (slave_tty, STDOUT_FILENO);
+			dup2 (slave_tty, STDERR_FILENO);
+			if (slave_tty != STDIN_FILENO &&
+				slave_tty != STDOUT_FILENO &&
+				slave_tty != STDERR_FILENO)
+				close (slave_tty);
+			close (signal_pipe[0]);
+			signal_pipe[0] = -1;
+			break;
+	}
+}