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udev: convert 'uaccess' to a builtin

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This commit is contained in:
Kay Sievers 2012-04-09 16:37:54 +02:00
parent f1ff47be17
commit 83cd6b754b
12 changed files with 188 additions and 62 deletions
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45
Makefile.am
View File

@ -1271,7 +1271,9 @@ udev_common_sources = \
src/udev/udev-builtin-input_id.c \
src/udev/udev-builtin-kmod.c \
src/udev/udev-builtin-path_id.c \
src/udev/udev-builtin-usb_id.c
src/udev/udev-builtin-usb_id.c \
src/systemd/sd-daemon.h \
src/sd-daemon.c
udev_common_CFLAGS = \
$(BLKID_CFLAGS) \
@ -1287,11 +1289,23 @@ udev_common_CPPFLAGS = \
-DFIRMWARE_PATH="$(FIRMWARE_PATH)" \
-DUSB_DATABASE=\"$(USB_DATABASE)\" -DPCI_DATABASE=\"$(PCI_DATABASE)\"
if HAVE_ACL
udev_common_sources += \
src/udev/udev-builtin-uaccess.c \
src/login/logind-acl.c \
src/acl-util.c
udev_common_CFLAGS += \
$(ACL_CFLAGS)
udev_common_LDADD += \
libsystemd-login.la \
$(ACL_LIBS)
endif
udevd_SOURCES = \
$(udev_common_sources) \
src/udev/udevd.c \
src/systemd/sd-daemon.h \
src/sd-daemon.c
src/udev/udevd.c
udevd_CFLAGS = \
$(udev_common_CFLAGS)
@ -2597,29 +2611,6 @@ systemd_multi_seat_x_LDADD = \
rootlibexec_PROGRAMS += \
systemd-multi-seat-x
systemd_uaccess_SOURCES = \
src/login/uaccess.c
if HAVE_ACL
systemd_uaccess_SOURCES += \
src/login/logind-acl.c \
src/acl-util.c
endif
systemd_uaccess_CFLAGS = \
$(AM_CFLAGS) \
$(ACL_CFLAGS)
systemd_uaccess_LDADD = \
libsystemd-basic.la \
libsystemd-daemon.la \
libsystemd-login.la \
libudev.la \
$(ACL_LIBS)
rootlibexec_PROGRAMS += \
systemd-uaccess
dist_udevrules_DATA += \
src/login/70-uaccess.rules

2
rules/80-drivers.rules
View File

@ -7,6 +7,6 @@ SUBSYSTEM=="tifm", ENV{TIFM_CARD_TYPE}=="SD", IMPORT{builtin}="kmod load tifm_sd
SUBSYSTEM=="tifm", ENV{TIFM_CARD_TYPE}=="MS", IMPORT{builtin}="kmod load tifm_ms"
SUBSYSTEM=="memstick", IMPORT{builtin}="kmod load ms_block mspro_block"
SUBSYSTEM=="i2o", IMPORT{builtin}="kmod load i2o_block"
SUBSYSTEM=="module", KERNEL=="parport_pc", IMPORT{builtin}="kmod load ppdev"
SUBSYSTEM=="module", KERNEL=="parport_pc", RUN{builtin}="kmod load ppdev"
LABEL="drivers_end"

2
src/login/70-uaccess.rules
View File

@ -9,7 +9,7 @@ ACTION=="remove", GOTO="uaccess_end"
ENV{MAJOR}=="", GOTO="uaccess_end"
# PTP/MTP protocol devices, cameras, portable media players
SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="", ENV{DEVTYPE}=="usb_device", IMPORT{program}="usb_id --export %p"
SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="", ENV{DEVTYPE}=="usb_device", IMPORT{builtin}="usb_id"
SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="*:060101:*", TAG+="uaccess"
# Digicams with proprietary protocol

2
src/login/73-seat-late.rules.in
View File

@ -12,6 +12,6 @@ ENV{ID_SEAT}=="", IMPORT{parent}="ID_SEAT"
ENV{ID_SEAT}!="", TAG+="$env{ID_SEAT}"
TAG=="uaccess", ENV{MAJOR}!="", RUN+="@rootlibexecdir@/systemd-uaccess $env{DEVNAME} $env{ID_SEAT}"
TAG=="uaccess", ENV{MAJOR}!="", RUN{builtin}+="uaccess"
LABEL="seat_late_end"

2
src/udev/test-udev.c
View File

@ -88,7 +88,7 @@ int main(int argc, char *argv[])
/* do what devtmpfs usually provides us */
if (udev_device_get_devnode(dev) != NULL) {
mode_t mode;
mode_t mode = 0600;
if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
mode |= S_IFBLK;

2
src/udev/test/rule-syntax-check.py
View File

@ -28,7 +28,7 @@ if len(sys.argv) < 2:
no_args_tests = re.compile('(ACTION|DEVPATH|KERNELS?|NAME|SYMLINK|SUBSYSTEMS?|DRIVERS?|TAG|RESULT|TEST)\s*(?:=|!)=\s*"([^"]*)"$')
args_tests = re.compile('(ATTRS?|ENV|TEST){([a-zA-Z0-9/_.*%-]+)}\s*(?:=|!)=\s*"([^"]*)"$')
no_args_assign = re.compile('(NAME|SYMLINK|OWNER|GROUP|MODE|TAG|PROGRAM|RUN|LABEL|GOTO|WAIT_FOR|OPTIONS|IMPORT)\s*(?:\+=|:=|=)\s*"([^"]*)"$')
args_assign = re.compile('(ATTR|ENV|IMPORT){([a-zA-Z0-9/_.*%-]+)}\s*=\s*"([^"]*)"$')
args_assign = re.compile('(ATTR|ENV|IMPORT|RUN){([a-zA-Z0-9/_.*%-]+)}\s*=\s*"([^"]*)"$')
result = 0
buffer = ''

6
src/udev/test/udev-test.pl
View File

@ -21,8 +21,8 @@ use warnings;
use strict;
my $PWD = $ENV{PWD};
my $sysfs = "test/sys";
my $udev_bin = "./test-udev";
my $sysfs = "src/udev/test/sys";
my $udev_bin = ".libs/test-udev";
my $valgrind = 0;
my $udev_bin_valgrind = "valgrind --tool=memcheck --leak-check=yes --quiet $udev_bin";
my $udev_root = "udev-root";
@ -1347,7 +1347,7 @@ sub udev {
if ($valgrind > 0) {
system("$udev_bin_valgrind $action $devpath");
} else {
system("$udev_bin $action $devpath");
system("$udev_bin", "$action", "$devpath");
}
}

99
src/udev/udev-builtin-uaccess.c Normal file
View File

@ -0,0 +1,99 @@
/*
* manage device node user ACL
*
* Copyright 2010-2012 Kay Sievers <kay@vrfy.org>
* Copyright 2010 Lennart Poettering
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <getopt.h>
#include <systemd/sd-daemon.h>
#include <systemd/sd-login.h>
#include "logind-acl.h"
#include "udev.h"
#include "util.h"
static int builtin_uaccess(struct udev_device *dev, int argc, char *argv[], bool test)
{
int r;
const char *path = NULL, *seat;
bool changed_acl = false;
uid_t uid;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
/* don't muck around with ACLs when the system is not running systemd */
if (!sd_booted())
return 0;
path = udev_device_get_devnode(dev);
seat = udev_device_get_property_value(dev, "ID_SEAT");
if (!seat)
seat = "seat0";
r = sd_seat_get_active(seat, NULL, &uid);
if (r == -ENOENT) {
/* No active session on this seat */
r = 0;
goto finish;
} else if (r < 0) {
log_error("Failed to determine active user on seat %s.", seat);
goto finish;
}
r = devnode_acl(path, true, false, 0, true, uid);
if (r < 0) {
log_error("Failed to apply ACL on %s: %s", path, strerror(-r));
goto finish;
}
changed_acl = true;
r = 0;
finish:
if (path && !changed_acl) {
int k;
/* Better be safe than sorry and reset ACL */
k = devnode_acl(path, true, false, 0, false, 0);
if (k < 0) {
log_error("Failed to apply ACL on %s: %s", path, strerror(-k));
if (r >= 0)
r = k;
}
}
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
const struct udev_builtin udev_builtin_uaccess = {
.name = "uaccess",
.cmd = builtin_uaccess,
.help = "manage device node user ACL",
};

3
src/udev/udev-builtin.c
View File

@ -34,6 +34,9 @@ static const struct udev_builtin *builtins[] = {
[UDEV_BUILTIN_PCI_DB] = &udev_builtin_pci_db,
[UDEV_BUILTIN_USB_DB] = &udev_builtin_usb_db,
[UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
#ifdef HAVE_ACL
[UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
#endif
};
int udev_builtin_init(struct udev *udev)

17
src/udev/udev-event.c
View File

@ -943,15 +943,20 @@ out:
return err;
}
int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
void udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
{
struct udev_list_entry *list_entry;
int err = 0;
udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
const char *cmd = udev_list_entry_get_name(list_entry);
enum udev_builtin_cmd builtin_cmd = udev_list_entry_get_num(list_entry);
if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
if (builtin_cmd < UDEV_BUILTIN_MAX) {
char command[UTIL_PATH_SIZE];
udev_event_apply_format(event, cmd, command, sizeof(command));
udev_builtin_run(event->dev, builtin_cmd, command, false);
} else if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
struct udev_monitor *monitor;
monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
@ -970,11 +975,7 @@ int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
udev_event_apply_format(event, cmd, program, sizeof(program));
envp = udev_device_get_properties_envp(event->dev);
if (udev_event_spawn(event, program, envp, sigmask, NULL, 0) < 0) {
if (udev_list_entry_get_num(list_entry))
err = -1;
}
udev_event_spawn(event, program, envp, sigmask, NULL, 0);
}
}
return err;
}

64
src/udev/udev-rules.c
View File

@ -168,7 +168,8 @@ enum token_type {
TK_A_NAME, /* val */
TK_A_DEVLINK, /* val */
TK_A_ATTR, /* val, attr */
TK_A_RUN, /* val, bool */
TK_A_RUN_BUILTIN, /* val, bool */
TK_A_RUN_PROGRAM, /* val, bool */
TK_A_GOTO, /* size_t */
TK_END,
@ -305,7 +306,8 @@ static const char *token_str(enum token_type type)
[TK_A_NAME] = "A NAME",
[TK_A_DEVLINK] = "A DEVLINK",
[TK_A_ATTR] = "A ATTR",
[TK_A_RUN] = "A RUN",
[TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
[TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
[TK_A_GOTO] = "A GOTO",
[TK_END] = "END",
@ -359,7 +361,8 @@ static void dump_token(struct udev_rules *rules, struct token *token)
case TK_A_OWNER:
case TK_A_GROUP:
case TK_A_MODE:
case TK_A_RUN:
case TK_A_RUN_BUILTIN:
case TK_A_RUN_PROGRAM:
log_debug("%s %s '%s'(%s)\n",
token_str(type), operation_str(op), value, string_glob_str(glob));
break;
@ -1049,7 +1052,9 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
case TK_A_STRING_ESCAPE_REPLACE:
case TK_A_DB_PERSIST:
break;
case TK_A_RUN:
case TK_A_RUN_BUILTIN:
token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
case TK_A_RUN_PROGRAM:
token->key.value_off = add_string(rule_tmp->rules, value);
break;
case TK_A_INOTIFY_WATCH:
@ -1379,7 +1384,7 @@ static int add_rule(struct udev_rules *rules, char *line,
log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
continue;
}
if (strstr(attr, "program")) {
if (strcmp(attr, "program") == 0) {
/* find known built-in command */
if (value[0] != '/') {
enum udev_builtin_cmd cmd;
@ -1393,22 +1398,23 @@ static int add_rule(struct udev_rules *rules, char *line,
}
}
rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
} else if (strstr(attr, "builtin")) {
} else if (strcmp(attr, "builtin") == 0) {
enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
if (cmd < UDEV_BUILTIN_MAX)
rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
else
log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
} else if (strstr(attr, "file")) {
} else if (strcmp(attr, "file") == 0) {
rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
} else if (strstr(attr, "db")) {
} else if (strcmp(attr, "db") == 0) {
rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
} else if (strstr(attr, "cmdline")) {
} else if (strcmp(attr, "cmdline") == 0) {
rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
} else if (strstr(attr, "parent")) {
} else if (strcmp(attr, "parent") == 0) {
rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
}
} else
log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
continue;
}
@ -1429,11 +1435,29 @@ static int add_rule(struct udev_rules *rules, char *line,
continue;
}
if (strcmp(key, "RUN") == 0) {
if (strncmp(value, "socket:", 7) == 0)
log_error("RUN+=\"socket:...\" support will be removed from a future udev release. "
"Please remove it from: %s:%u and use libudev to subscribe to events.\n", filename, lineno);
rule_add_key(&rule_tmp, TK_A_RUN, op, value, NULL);
if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
if (attr == NULL)
attr = "program";
if (strcmp(attr, "builtin") == 0) {
enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
if (cmd < UDEV_BUILTIN_MAX)
rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
else
log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
} else if (strcmp(attr, "program") == 0) {
enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
if (strncmp(value, "socket:", 7) == 0)
log_error("RUN+=\"socket:...\" support will be removed from a future udev release. "
"Please remove it from: %s:%u and use libudev to subscribe to events.\n", filename, lineno);
rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
} else {
log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
}
continue;
}
@ -2602,14 +2626,18 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
}
break;
}
case TK_A_RUN: {
case TK_A_RUN_BUILTIN:
case TK_A_RUN_PROGRAM: {
struct udev_list_entry *entry;
if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
udev_list_cleanup(&event->run_list);
log_debug("RUN '%s' %s:%u\n",
&rules->buf[cur->key.value_off],
&rules->buf[rule->rule.filename_off],
rule->rule.filename_line);
udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
udev_list_entry_set_num(entry, cur->key.builtin_cmd);
break;
}
case TK_A_GOTO:

6
src/udev/udev.h
View File

@ -78,7 +78,7 @@ int udev_event_spawn(struct udev_event *event,
const char *cmd, char **envp, const sigset_t *sigmask,
char *result, size_t ressize);
int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigset);
int udev_event_execute_run(struct udev_event *event, const sigset_t *sigset);
void udev_event_execute_run(struct udev_event *event, const sigset_t *sigset);
int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]);
/* udev-watch.c */
@ -138,6 +138,9 @@ enum udev_builtin_cmd {
UDEV_BUILTIN_PCI_DB,
UDEV_BUILTIN_USB_DB,
UDEV_BUILTIN_USB_ID,
#ifdef HAVE_ACL
UDEV_BUILTIN_UACCESS,
#endif
UDEV_BUILTIN_MAX
};
struct udev_builtin {
@ -157,6 +160,7 @@ extern const struct udev_builtin udev_builtin_path_id;
extern const struct udev_builtin udev_builtin_pci_db;
extern const struct udev_builtin udev_builtin_usb_db;
extern const struct udev_builtin udev_builtin_usb_id;
extern const struct udev_builtin udev_builtin_uaccess;
int udev_builtin_init(struct udev *udev);
void udev_builtin_exit(struct udev *udev);
enum udev_builtin_cmd udev_builtin_lookup(const char *command);