diff options
Diffstat (limited to 'test/test-udev.c')
| -rw-r--r-- | test/test-udev.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/test/test-udev.c b/test/test-udev.c new file mode 100644 index 0000000000..26e173de63 --- /dev/null +++ b/test/test-udev.c @@ -0,0 +1,180 @@ +/*** + This file is part of systemd. + + Copyright 2003-2004 Greg Kroah-Hartman <greg@kroah.com> + Copyright 2004-2012 Kay Sievers <kay@vrfy.org> + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stdio.h> +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <ctype.h> +#include <errno.h> +#include <unistd.h> +#include <syslog.h> +#include <grp.h> +#include <sched.h> +#include <sys/mount.h> +#include <sys/signalfd.h> + +#include "udev.h" + +#ifndef HAVE_UNSHARE +#include <sys/syscall.h> +/* Provide our own replacement with local reach*/ +static inline int unshare (int x) { return syscall(SYS_unshare, x); } +#endif + +#ifndef _USE_GNU +/* Make sure CLONE_NEWNS macro is available */ +#include <linux/sched.h> +#endif + +void udev_main_log(struct udev *udev, int priority, + const char *file, int line, const char *fn, + const char *format, va_list args) {} + +static int fake_filesystems(void) { + static const struct fakefs { + const char *src; + const char *target; + const char *error; + } fakefss[] = { + { "test/sys", "/sys", "failed to mount test /sys" }, + { "test/dev", "/dev", "failed to mount test /dev" }, + { "test/run", "/run", "failed to mount test /run" }, + { "test/run", "/etc/udev/rules.d", "failed to mount empty /etc/udev/rules.d" }, + }; + unsigned int i; + int err; + + err = unshare(CLONE_NEWNS); + if (err < 0) { + err = -errno; + fprintf(stderr, "failed to call unshare(): %m\n"); + goto out; + } + + if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) < 0) { + err = -errno; + fprintf(stderr, "failed to mount / as private: %m\n"); + goto out; + } + + for (i = 0; i < ELEMENTSOF(fakefss); i++) { + err = mount(fakefss[i].src, fakefss[i].target, "tmpfs", MS_BIND, NULL); + if (err < 0) { + err = -errno; + fprintf(stderr, "%s %m", fakefss[i].error); + return err; + } + } +out: + return err; +} + + +int main(int argc, char *argv[]) +{ + struct udev *udev; + struct udev_event *event = NULL; + struct udev_device *dev = NULL; + struct udev_rules *rules = NULL; + char syspath[UTIL_PATH_SIZE]; + const char *devpath; + const char *action; + sigset_t mask, sigmask_orig; + int err; + + err = fake_filesystems(); + if (err < 0) + return EXIT_FAILURE; + + udev = udev_new(); + if (udev == NULL) + exit(EXIT_FAILURE); + log_debug("version %s\n", VERSION); + label_init("/dev"); + + sigprocmask(SIG_SETMASK, NULL, &sigmask_orig); + + action = argv[1]; + if (action == NULL) { + log_error("action missing\n"); + goto out; + } + + devpath = argv[2]; + if (devpath == NULL) { + log_error("devpath missing\n"); + goto out; + } + + rules = udev_rules_new(udev, 1); + + util_strscpyl(syspath, sizeof(syspath), "/sys", devpath, NULL); + dev = udev_device_new_from_syspath(udev, syspath); + if (dev == NULL) { + log_debug("unknown device '%s'\n", devpath); + goto out; + } + + udev_device_set_action(dev, action); + event = udev_event_new(dev); + + sigfillset(&mask); + sigprocmask(SIG_SETMASK, &mask, &sigmask_orig); + event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); + if (event->fd_signal < 0) { + fprintf(stderr, "error creating signalfd\n"); + goto out; + } + + /* do what devtmpfs usually provides us */ + if (udev_device_get_devnode(dev) != NULL) { + mode_t mode = 0600; + + if (strcmp(udev_device_get_subsystem(dev), "block") == 0) + mode |= S_IFBLK; + else + mode |= S_IFCHR; + + if (strcmp(action, "remove") != 0) { + mkdir_parents_label(udev_device_get_devnode(dev), 0755); + mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev)); + } else { + unlink(udev_device_get_devnode(dev)); + util_delete_path(udev, udev_device_get_devnode(dev)); + } + } + + err = udev_event_execute_rules(event, rules, &sigmask_orig); + if (err == 0) + udev_event_execute_run(event, NULL); +out: + if (event != NULL && event->fd_signal >= 0) + close(event->fd_signal); + udev_event_unref(event); + udev_device_unref(dev); + udev_rules_unref(rules); + label_finish(); + udev_unref(udev); + if (err != 0) + return EXIT_FAILURE; + return EXIT_SUCCESS; +} |