fstab_import: add program to IMPORT matching fstab entry

  DEVPATH=/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
  SUBSYSTEM=block
  ...
  ID_FS_USAGE=filesystem
  ID_FS_TYPE=ext3
  ID_FS_VERSION=1.0
  ...
  FSTAB_NAME=/dev/disk/by-id/scsi-SATA_ST910021AS_3MH0Y3KF-part6
  FSTAB_DIR=/home/kay/work
  FSTAB_TYPE=ext3
  FSTAB_OPTS=defaults
  FSTAB_FREQ=1
  FSTAB_PASSNO=1

3 files changed, 287 insertions, 0 deletions

diff --git a/extras/fstab_import/79-fstab_import.rules b/extras/fstab_import/79-fstab_import.rules
new file mode 100644
index 0000000000..ccd718c5f0
--- /dev/null
+++ b/extras/fstab_import/79-fstab_import.rules
@@ -0,0 +1,2 @@
+ACTION=="add", SUBSYSTEM=="block", ENV{ID_FS_USAGE}=="filesystem|other", IMPORT="fstab_import --root=$root $name $links mapper/$env{DM_NAME}"
+
diff --git a/extras/fstab_import/Makefile b/extras/fstab_import/Makefile
new file mode 100644
index 0000000000..23448f3217
--- /dev/null
+++ b/extras/fstab_import/Makefile
@@ -0,0 +1,72 @@
+# Makefile for udev extra invoked from the udev main Makefile
+#
+# Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
+#
+# Released under the GNU General Public License, version 2.
+#
+
+PROG = fstab_import
+OBJ =
+HEADERS =
+GEN_HEADERS =
+MAN_PAGES =
+
+prefix =
+etcdir =	${prefix}/etc
+sbindir =	${prefix}/sbin
+usrbindir =	${prefix}/usr/bin
+usrsbindir =	${prefix}/usr/sbin
+libudevdir =	${prefix}/lib/udev
+mandir =	${prefix}/usr/share/man
+configdir =	${etcdir}/udev/
+
+INSTALL = install -c
+INSTALL_PROGRAM = ${INSTALL}
+INSTALL_DATA  = ${INSTALL} -m 644
+INSTALL_SCRIPT = ${INSTALL}
+
+all: $(PROG) $(MAN_PAGES)
+.PHONY: all
+.DEFAULT: all
+
+%.o: %.c $(GEN_HEADERS)
+	$(E) "  CC      " $@
+	$(Q) $(CC) -c $(CFLAGS) $< -o $@
+
+$(PROG): %: $(HEADERS) %.o $(OBJS)
+	$(E) "  LD      " $@
+	$(Q) $(LD) $(LDFLAGS) $@.o $(OBJS) -o $@ $(LIBUDEV) $(LIB_OBJS)
+
+# man pages
+%.8: %.xml
+	$(E) "  XMLTO   " $@
+	$(Q) xmlto man $?
+.PRECIOUS: %.8
+
+clean:
+	$(E) "  CLEAN   "
+	$(Q) rm -f $(PROG) $(OBJS) $(GEN_HEADERS)
+.PHONY: clean
+
+install-bin: all
+	$(INSTALL_PROGRAM) -D $(PROG) $(DESTDIR)$(libudevdir)/$(PROG)
+	$(INSTALL_DATA) 79-fstab_import.rules $(DESTDIR)$(configdir)/rules.d/79-fstab_import.rules
+.PHONY: install-bin
+
+uninstall-bin:
+	- rm $(DESTDIR)$(libudevdir)/$(PROG)
+	- rm $(DESTDIR)$(configdir)/rules.d/79-fstab_import.rules
+.PHONY: uninstall-bin
+
+install-man:
+	@echo "Please create a man page for this tool."
+.PHONY: install-man
+
+uninstall-man:
+	@echo "Please create a man page for this tool."
+.PHONY: uninstall-man
+
+install-config:
+	@echo "no config file to install"
+.PHONY: install-config
+
diff --git a/extras/fstab_import/fstab_import.c b/extras/fstab_import/fstab_import.c
new file mode 100644
index 0000000000..a8de067b38
--- /dev/null
+++ b/extras/fstab_import/fstab_import.c
@@ -0,0 +1,213 @@
+/*
+ * find matching entry in fstab and export it
+ *
+ * Copyright (C) 2008 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, either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <getopt.h>
+#include <mntent.h>
+#include <sys/stat.h>
+
+#include "../../udev.h"
+
+static int debug;
+static char root[PATH_SIZE] = "/dev";
+static char **devices;
+
+#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 (debug && udev_log < LOG_INFO)
+			udev_log = LOG_INFO;
+	}
+
+	if (priority > udev_log)
+		return;
+
+	va_start(args, format);
+	if (debug) {
+		fprintf(stderr, "[%d] ", (int) getpid());
+		vfprintf(stderr, format, args);
+	} else
+		vsyslog(priority, format, args);
+	va_end(args);
+}
+#endif
+
+static int matches_device_list(const char *name)
+{
+	int i;
+
+	for (i = 0; devices[i] != NULL; i++) {
+		info("compare '%s' == '%s'\n", name, devices[i]);
+		if (strcmp(devices[i], name) == 0)
+			return 1;
+	}
+	return 0;
+}
+
+static void print_fstab_entry(struct mntent *mnt)
+{
+	printf("FSTAB_NAME=%s\n", mnt->mnt_fsname);
+	printf("FSTAB_DIR=%s\n", mnt->mnt_dir);
+	printf("FSTAB_TYPE=%s\n", mnt->mnt_type);
+	printf("FSTAB_OPTS=%s\n", mnt->mnt_opts);
+	printf("FSTAB_FREQ=%d\n", mnt->mnt_freq);
+	printf("FSTAB_PASSNO=%d\n", mnt->mnt_passno);
+}
+
+int main(int argc, char *argv[])
+{
+	static const struct option options[] = {
+		{ "export", 0, NULL, 'x' },
+		{ "root", 1, NULL, 'r' },
+		{ "debug", 0, NULL, 'd' },
+		{ "help", 0, NULL, 'h' },
+		{}
+	};
+
+	FILE *fp;
+	struct mntent *mnt;
+	int rc = 0;
+
+	logging_init("fstab_id");
+
+	while (1) {
+		int option;
+
+		option = getopt_long(argc, argv, "dr:xh", options, NULL);
+		if (option == -1)
+			break;
+
+		switch (option) {
+		case 'r':
+			strlcpy(root, optarg, sizeof(root));
+			break;
+		case 'd':
+			debug = 1;
+			break;
+		case 'h':
+			printf("Usage: fstab_id [OPTIONS] name [...]\n"
+			       "  --export        print environment keys\n"
+			       "  --root          device node root (default /dev)\n"
+			       "  --debug         debug to stderr\n"
+			       "  --help          print this help text\n\n");
+		default:
+			rc = 1;
+			goto exit;
+		}
+	}
+
+	devices = &argv[optind];
+	if (devices[0] == NULL) {
+		fprintf(stderr, "error: missing device(s) to match\n");
+		rc = 2;
+		goto exit;
+	}
+
+	fp = setmntent ("/etc/fstab", "r");
+	if (fp == NULL) {
+		fprintf(stderr, "error: opening fstab: %s\n", strerror(errno));
+		rc = 2;
+		goto exit;
+	}
+
+	while (1) {
+		mnt = getmntent(fp);
+		if (mnt == NULL)
+			break;
+
+		/* skip root device */
+		if (strcmp(mnt->mnt_dir, "/") == 0)
+			continue;
+
+		/* match LABEL */
+		if (strncmp(mnt->mnt_fsname, "LABEL=", 6) == 0) {
+			const char *label;
+			char str[256];
+
+			label = &mnt->mnt_fsname[6];
+			if (label[0] == '"' || label[0] == '\'') {
+				char *pos;
+
+				strlcpy(str, &label[1], sizeof(str));
+				pos = strrchr(str, label[0]);
+				if (pos == NULL)
+					continue;
+				pos[0] = '\0';
+				label = str;
+			}
+			if (matches_device_list(str)) {
+				print_fstab_entry(mnt);
+				break;
+			}
+			continue;
+		}
+
+		/* match UUID */
+		if (strncmp(mnt->mnt_fsname, "UUID=", 5) == 0) {
+			const char *uuid;
+			char str[256];
+
+			uuid = &mnt->mnt_fsname[5];
+			if (uuid[0] == '"' || uuid[0] == '\'') {
+				char *pos;
+
+				strlcpy(str, &uuid[1], sizeof(str));
+				pos = strrchr(str, uuid[0]);
+				if (pos == NULL)
+					continue;
+				pos[0] = '\0';
+				uuid = str;
+			}
+			if (matches_device_list(str)) {
+				print_fstab_entry(mnt);
+				break;
+			}
+			continue;
+		}
+
+		/* only devices */
+		if (strncmp(mnt->mnt_fsname, root, strlen(root)) != 0)
+			continue;
+
+		if (matches_device_list(&mnt->mnt_fsname[strlen(root)+1])) {
+			print_fstab_entry(mnt);
+			break;
+		}
+	}
+
+	endmntent(fp);
+
+exit:
+	logging_close();
+	return rc;
+}