udev: move dev.d/ handling to external helper

Modern rules are expected to call notification and postprocessing with    
the RUN key. For compatibility the current behavior can be emulated
with an external helper.

Signed-off-by: Kay Sievers <kay.sievers@suse.de> 

4 files changed, 291 insertions, 0 deletions

diff --git a/extras/run_directory/Makefile b/extras/run_directory/Makefile
new file mode 100644
index 0000000000..12dccf0749
--- /dev/null
+++ b/extras/run_directory/Makefile
@@ -0,0 +1,55 @@
+# Makefile for udev_volume_id
+#
+# Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+
+DEVD = udev_run_devd
+HOTPLUGD = udev_run_hotplugd
+
+all:	$(DEVD) $(HOTPLUGD)
+
+prefix =
+exec_prefix =	${prefix}
+etcdir =	${prefix}/etc
+sbindir =	${exec_prefix}/sbin
+usrbindir =	${exec_prefix}/usr/bin
+usrsbindir =	${exec_prefix}/usr/sbin
+mandir =	${prefix}/usr/share/man
+devddir =	${etcdir}/dev.d/default
+configdir =	${etcdir}/udev/
+initdir = 	${etcdir}/init.d/
+srcdir = .
+
+INSTALL = /usr/bin/install -c
+INSTALL_PROGRAM = ${INSTALL}
+INSTALL_DATA  = ${INSTALL} -m 644
+INSTALL_SCRIPT = ${INSTALL_PROGRAM}
+
+override CFLAGS+=-D_FILE_OFFSET_BITS=64
+
+OBJS = ../../udev.a ../../libsysfs/sysfs.a
+
+.c.o:
+	$(QUIET) $(CC) $(CFLAGS) -c -o $@ $<
+
+$(DEVD): $(HEADERS) $(DEVD).o run_directory.o
+	$(QUIET) $(LD) $(LDFLAGS) -o $(DEVD) $(DEVD).o run_directory.o $(OBJS)
+
+$(HOTPLUGD): $(HEADERS) $(HOTPLUGD).o run_directory.o
+	$(QUIET) $(LD) $(LDFLAGS) -o $(HOTPLUGD) $(HOTPLUGD).o run_directory.o $(OBJS)
+
+clean:
+	rm -f $(DEVD) $(HOTPLUGD) run_directory.o
+
+spotless: clean
+
+install: all
+	$(INSTALL_PROGRAM) $(DEVD) $(DESTDIR)$(sbindir)/$(DEVD)
+	$(INSTALL_PROGRAM) $(HOTPLUGD) $(DESTDIR)$(sbindir)/$(HOTPLUGD)
+
+uninstall:
+	- rm $(DESTDIR)$(sbindir)/$(DEVD)
diff --git a/extras/run_directory/run_directory.c b/extras/run_directory/run_directory.c
new file mode 100644
index 0000000000..e6c6173eca
--- /dev/null
+++ b/extras/run_directory/run_directory.c
@@ -0,0 +1,79 @@
+/*
+ * udev_run_directory.c - directory multiplexer
+ *
+ * Copyright (C) 2005 Kay Sievers <kay@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "../../udev_utils.h"
+#include "../../list.h"
+#include "../../logging.h"
+
+int run_directory(const char *dir, const char *suffix, const char *subsystem);
+
+static int run_program(const char *filename, const char *subsystem)
+{
+	pid_t pid;
+
+	dbg("running %s", filename);
+	pid = fork();
+	switch (pid) {
+	case 0:
+		/* child */
+		execl(filename, filename, subsystem, NULL);
+		dbg("exec of child failed");
+		_exit(1);
+	case -1:
+		dbg("fork of child failed");
+		break;
+		return -1;
+	default:
+		waitpid(pid, NULL, 0);
+	}
+
+	return 0;
+}
+
+int run_directory(const char *dir, const char *suffix, const char *subsystem)
+{
+	char dirname[NAME_SIZE];
+	struct name_entry *name_loop, *name_tmp;
+	LIST_HEAD(name_list);
+
+	if (subsystem) {
+		snprintf(dirname, sizeof(dirname), "%s/%s", dir, subsystem);
+		dirname[sizeof(dirname)-1] = '\0';
+		dbg("looking at '%s'", dirname);
+		add_matching_files(&name_list, dirname, suffix);
+	}
+
+	snprintf(dirname, sizeof(dirname), "%s/default", dir);
+	dirname[sizeof(dirname)-1] = '\0';
+	dbg("looking at '%s'", dirname);
+	add_matching_files(&name_list, dirname, suffix);
+
+	list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
+		run_program(name_loop->name, subsystem);
+		list_del(&name_loop->node);
+	}
+
+	logging_close();
+	return 0;
+}
diff --git a/extras/run_directory/udev_run_devd.c b/extras/run_directory/udev_run_devd.c
new file mode 100644
index 0000000000..02bbc8c353
--- /dev/null
+++ b/extras/run_directory/udev_run_devd.c
@@ -0,0 +1,78 @@
+/*
+ * udev_run_devd.c - directory multiplexer
+ *
+ * Copyright (C) 2005 Kay Sievers <kay@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "../../udev_utils.h"
+#include "../../list.h"
+#include "../../logging.h"
+
+extern int run_directory(const char *dir, const char *suffix, const char *subsystem);
+
+#ifdef USE_LOG
+void log_message (int priority, const char *format, ...)
+{
+	va_list args;
+	static int udev_log = -1;
+
+	if (udev_log == -1) {
+		const char *value;
+
+		value = getenv("UDEV_LOG");
+		if (value)
+			udev_log = log_priority(value);
+		else
+			udev_log = LOG_ERR;
+	}
+
+	if (priority > udev_log)
+		return;
+
+	va_start(args, format);
+	vsyslog(priority, format, args);
+	va_end(args);
+}
+#endif
+
+int main(int argc, char *argv[], char *envp[])
+{
+	const char *subsystem;
+	int fd;
+
+	if (getenv("DEVNAME") == NULL)
+		exit(0);
+
+	subsystem = argv[1];
+	logging_init("udev_run_devd");
+
+	fd = open("/dev/null", O_RDWR);
+	if (fd >= 0) {
+		dup2(fd, STDOUT_FILENO);
+		dup2(fd, STDIN_FILENO);
+		dup2(fd, STDERR_FILENO);
+		close(fd);
+	}
+	dbg("running dev.d directory");
+
+	run_directory("/etc/dev.d", ".dev", subsystem);
+	exit(0);
+}
diff --git a/extras/run_directory/udev_run_hotplugd.c b/extras/run_directory/udev_run_hotplugd.c
new file mode 100644
index 0000000000..463473d7c7
--- /dev/null
+++ b/extras/run_directory/udev_run_hotplugd.c
@@ -0,0 +1,79 @@
+/*
+ * udev_run_hotplugd.c - directory multiplexer
+ *
+ * Copyright (C) 2005 Kay Sievers <kay@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "../../udev_utils.h"
+#include "../../list.h"
+#include "../../logging.h"
+
+extern int run_directory(const char *dir, const char *suffix, const char *subsystem);
+
+#ifdef USE_LOG
+void log_message (int priority, const char *format, ...)
+{
+	va_list args;
+	static int udev_log = -1;
+
+	if (udev_log == -1) {
+		const char *value;
+
+		value = getenv("UDEV_LOG");
+		if (value)
+			udev_log = log_priority(value);
+		else
+			udev_log = LOG_ERR;
+	}
+
+	if (priority > udev_log)
+		return;
+
+	va_start(args, format);
+	vsyslog(priority, format, args);
+	va_end(args);
+}
+#endif
+
+int main(int argc, char *argv[], char *envp[])
+{
+	const char *subsystem;
+	int fd;
+
+	if (getenv("DEVNAME") == NULL)
+		exit(0);
+
+	subsystem = argv[1];
+	logging_init("udev_run_hotplugd");
+
+	fd = open("/dev/null", O_RDWR);
+	if (fd >= 0) {
+		dup2(fd, STDOUT_FILENO);
+		dup2(fd, STDIN_FILENO);
+		dup2(fd, STDERR_FILENO);
+		close(fd);
+	}
+
+	dbg("running dev.d directory");
+
+	run_directory("/etc/hotplug.d", ".hotplug", subsystem);
+	exit(0);
+}