migrate fully to meson build system

- drop old build system
- move shared include and source files to common directory
- drop "rc-" prefix from shared include and source files
- move executable-specific code to individual directories under src
- adjust top-level .gitignore file for new build system

This closes #489.

1 files changed, 211 insertions, 0 deletions

diff --git a/src/openrc-shutdown/broadcast.c b/src/openrc-shutdown/broadcast.c
new file mode 100644
index 00000000..402a9fb9
--- /dev/null
+++ b/src/openrc-shutdown/broadcast.c
@@ -0,0 +1,211 @@
+/*
+ * broadcast.c
+ * broadcast a message to every logged in user
+ */
+
+/*
+ * Copyright 2018 Sony Interactive Entertainment Inc.
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ *    except according to the terms contained in the LICENSE file.
+ */
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <utmp.h>
+#include <utmpx.h>
+#include <pwd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <paths.h>
+#include <sys/utsname.h>
+
+#include "broadcast.h"
+#include "helpers.h"
+
+#ifndef _PATH_DEV
+# define _PATH_DEV	"/dev/"
+#endif
+
+static sigjmp_buf jbuf;
+
+/*
+ *	Alarm handler
+ */
+/*ARGSUSED*/
+# ifdef __GNUC__
+static void handler(int arg __attribute__((unused)))
+# else
+static void handler(int arg)
+# endif
+{
+	siglongjmp(jbuf, 1);
+}
+
+static void getuidtty(char **userp, char **ttyp)
+{
+	struct passwd 		*pwd;
+	uid_t			uid;
+	char			*tty;
+	static char		uidbuf[32];
+	char		*ttynm = NULL;
+
+	uid = getuid();
+	if ((pwd = getpwuid(uid)) != NULL) {
+		uidbuf[0] = 0;
+		strncat(uidbuf, pwd->pw_name, sizeof(uidbuf) - 1);
+	} else {
+		if (uid)
+			sprintf(uidbuf, "uid %d", (int) uid);
+		else
+			sprintf(uidbuf, "root");
+	}
+
+	if ((tty = ttyname(0)) != NULL) {
+		const size_t plen = strlen(_PATH_DEV);
+		if (strncmp(tty, _PATH_DEV, plen) == 0) {
+			tty += plen;
+			if (tty[0] == '/')
+				tty++;
+		}
+		xasprintf(&ttynm, "(%s) ", tty);
+	}
+
+	*userp = uidbuf;
+	*ttyp  = ttynm;
+}
+
+/*
+ *	Check whether the given filename looks like a tty device.
+ */
+static int file_isatty(const char *fname)
+{
+	struct stat		st;
+	int			major;
+
+	if (stat(fname, &st) < 0)
+		return 0;
+
+	if (st.st_nlink != 1 || !S_ISCHR(st.st_mode))
+		return 0;
+
+	/*
+	 *	It would be an impossible task to list all major/minors
+	 *	of tty devices here, so we just exclude the obvious
+	 *	majors of which just opening has side-effects:
+	 *	printers and tapes.
+	 */
+	major = major(st.st_dev);
+	if (major == 1 || major == 2 || major == 6 || major == 9 ||
+	    major == 12 || major == 16 || major == 21 || major == 27 ||
+	    major == 37 || major == 96 || major == 97 || major == 206 ||
+	    major == 230)
+		return 0;
+	return 1;
+}
+
+/*
+ *	broadcast function.
+ *
+ *	NB: Not multithread safe.
+ */
+void broadcast(char *text)
+{
+	char *tty;
+	char *user;
+	struct utsname name;
+	time_t t;
+	char	*date;
+	char *p;
+	char *line = NULL;
+	struct sigaction sa;
+	int	flags;
+	char *term = NULL;
+	struct utmpx *utmp;
+	/*
+	 * These are set across the sigsetjmp call, so they can't be stored on
+	 * the stack, otherwise they might be clobbered.
+	 */
+	static int fd;
+	static FILE *tp;
+
+	getuidtty(&user, &tty);
+
+	/*
+	 * Get and report current hostname, to make it easier to find out
+	 * which machine is being shut down.
+	 */
+	uname(&name);
+
+	/* Get the time */
+	time(&t);
+	date = ctime(&t);
+	p = strchr(date, '\n');
+	if (p)
+		*p = 0;
+
+	xasprintf(&line, "\007\r\nBroadcast message from %s@%s %s(%s):\r\n\r\n",
+			user, name.nodename, tty, date);
+	free(tty);
+
+	/*
+	 *	Fork to avoid hanging in a write()
+	 */
+	if (fork() != 0)
+		return;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = handler;
+	sigemptyset(&sa.sa_mask);
+	sigaction(SIGALRM, &sa, NULL);
+
+	setutxent();
+
+	while ((utmp = getutxent()) != NULL) {
+		if (utmp->ut_type != USER_PROCESS || utmp->ut_user[0] == 0)
+			continue;
+		if (strncmp(utmp->ut_line, _PATH_DEV, strlen(_PATH_DEV)) == 0)
+			xasprintf(&term, "%s", utmp->ut_line);
+		else
+			xasprintf(&term, "%s%s", _PATH_DEV, utmp->ut_line);
+		if (strstr(term, "/../")) {
+			free(term);
+			continue;
+		}
+
+		/*
+		 *	Open it non-delay
+		 */
+		if (sigsetjmp(jbuf, 1) == 0) {
+			alarm(2);
+			flags = O_WRONLY|O_NDELAY|O_NOCTTY;
+			if (file_isatty(term) && (fd = open(term, flags)) >= 0) {
+				if (isatty(fd) && (tp = fdopen(fd, "w")) != NULL) {
+					fputs(line, tp);
+					fputs(text, tp);
+					fflush(tp);
+				}
+			}
+		}
+		alarm(0);
+		if (fd >= 0)
+			close(fd);
+		if (tp != NULL)
+			fclose(tp);
+		free(term);
+	}
+	endutxent();
+	free(line);
+	exit(0);
+}