stop socket or mask on rpm update
requires systemd 25
+hard event timeout now. hanging programs will be killed
+
udev 167
========
Bugfixes.
+ - kill alarm()
+
+ - empty rules files and link to /dev/null are ok
+
+ - rename netif with ifindex not devname
+
+ - kill tabs?
- remove deprecated trigger --type=failed logic
struct udev_list_node tags_list;
unsigned long long int seqnum;
unsigned long long int usec_initialized;
- int event_timeout;
int timeout;
int devlink_priority;
int refcount;
udev_list_init(&udev_device->sysattr_value_list);
udev_list_init(&udev_device->sysattr_list);
udev_list_init(&udev_device->tags_list);
- udev_device->event_timeout = -1;
+ udev_device->timeout = -1;
udev_device->watch_handle = -1;
/* copy global properties */
udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev))
udev_device_read_db(udev_device, NULL);
if (udev_device->usec_initialized == 0)
return 0;
- now = usec_monotonic();
+ now = now_usec();
if (now == 0)
return 0;
return now - udev_device->usec_initialized;
}
int udev_device_set_timeout(struct udev_device *udev_device, int timeout)
-{
- udev_device->timeout = timeout;
- return 0;
-}
-int udev_device_get_event_timeout(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_device->event_timeout;
-}
-
-int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout)
{
char num[32];
- udev_device->event_timeout = event_timeout;
- snprintf(num, sizeof(num), "%u", event_timeout);
+ udev_device->timeout = timeout;
+ snprintf(num, sizeof(num), "%u", timeout);
udev_device_add_property(udev_device, "TIMEOUT", num);
return 0;
}
int udev_device_set_knodename(struct udev_device *udev_device, const char *knodename);
int udev_device_get_timeout(struct udev_device *udev_device);
int udev_device_set_timeout(struct udev_device *udev_device, int timeout);
-int udev_device_get_event_timeout(struct udev_device *udev_device);
-int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout);
int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum);
int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum);
unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device);
int util_unlink_secure(struct udev *udev, const char *filename);
uid_t util_lookup_user(struct udev *udev, const char *user);
gid_t util_lookup_group(struct udev *udev, const char *group);
-int util_run_program(struct udev *udev, const char *command, char **envp,
- char *result, size_t ressize, size_t *reslen,
- const sigset_t *sigmask);
int util_resolve_subsys_kernel(struct udev *udev, const char *string,
char *result, size_t maxsize, int read_value);
-unsigned long long usec_monotonic(void);
+unsigned long long now_usec(void);
/* libudev-selinux-private.c */
#ifndef WITH_SELINUX
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
-#include <sys/prctl.h>
-#include <sys/epoll.h>
-#include <sys/wait.h>
#include <sys/param.h>
#include "libudev.h"
udev_device_unref(dev);
return 0;
}
-
-static int run_program_exec(struct udev *udev, int fd_stdout, int fd_stderr,
- char *const argv[], char **envp, const sigset_t *sigmask)
-{
- int err;
- int fd;
-
- /* discard child output or connect to pipe */
- fd = open("/dev/null", O_RDWR);
- if (fd >= 0) {
- dup2(fd, STDIN_FILENO);
- if (fd_stdout < 0)
- dup2(fd, STDOUT_FILENO);
- if (fd_stderr < 0)
- dup2(fd, STDERR_FILENO);
- close(fd);
- } else {
- err(udev, "open /dev/null failed: %m\n");
- }
-
- /* connect pipes to std{out,err} */
- if (fd_stdout >= 0) {
- dup2(fd_stdout, STDOUT_FILENO);
- close(fd_stdout);
- }
- if (fd_stderr >= 0) {
- dup2(fd_stderr, STDERR_FILENO);
- close(fd_stderr);
- }
-
- /* terminate child in case parent goes away */
- prctl(PR_SET_PDEATHSIG, SIGTERM);
-
- /* restore original udev sigmask before exec */
- if (sigmask)
- sigprocmask(SIG_SETMASK, sigmask, NULL);
-
- execve(argv[0], argv, envp);
-
- /* exec failed */
- err = -errno;
- if (err == -ENOENT || err == -ENOTDIR) {
- /* may be on a filesystem which is not mounted right now */
- info(udev, "program '%s' not found\n", argv[0]);
- } else {
- /* other problems */
- err(udev, "exec of program '%s' failed\n", argv[0]);
- }
- return err;
-}
-
-static int run_program_read(struct udev *udev, int fd_stdout, int fd_stderr,
- char *const argv[], char *result, size_t ressize, size_t *reslen)
-{
- size_t respos = 0;
- int fd_ep = -1;
- struct epoll_event ep_outpipe;
- struct epoll_event ep_errpipe;
- int err = 0;
-
- /* read from child if requested */
- if (fd_stdout < 0 && fd_stderr < 0)
- return 0;
-
- fd_ep = epoll_create1(EPOLL_CLOEXEC);
- if (fd_ep < 0) {
- err = -errno;
- err(udev, "error creating epoll fd: %m\n");
- goto out;
- }
-
- if (fd_stdout >= 0) {
- memset(&ep_outpipe, 0, sizeof(struct epoll_event));
- ep_outpipe.events = EPOLLIN;
- ep_outpipe.data.ptr = &fd_stdout;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) {
- err(udev, "fail to add fd to epoll: %m\n");
- goto out;
- }
- }
-
- if (fd_stderr >= 0) {
- memset(&ep_errpipe, 0, sizeof(struct epoll_event));
- ep_errpipe.events = EPOLLIN;
- ep_errpipe.data.ptr = &fd_stderr;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) {
- err(udev, "fail to add fd to epoll: %m\n");
- goto out;
- }
- }
-
- /* read child output */
- while (fd_stdout >= 0 || fd_stderr >= 0) {
- int fdcount;
- struct epoll_event ev[4];
- int i;
-
- fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- err(udev, "failed to poll: %m\n");
- err = -errno;
- goto out;
- }
-
- for (i = 0; i < fdcount; i++) {
- int *fd = (int *)ev[i].data.ptr;
-
- if (ev[i].events & EPOLLIN) {
- ssize_t count;
- char buf[4096];
-
- count = read(*fd, buf, sizeof(buf)-1);
- if (count <= 0)
- continue;
- buf[count] = '\0';
-
- /* store stdout result */
- if (result != NULL && *fd == fd_stdout) {
- if (respos + count < ressize) {
- memcpy(&result[respos], buf, count);
- respos += count;
- } else {
- err(udev, "ressize %zd too short\n", ressize);
- err = -ENOBUFS;
- }
- }
-
- /* log debug output only if we watch stderr */
- if (fd_stderr >= 0) {
- char *pos;
- char *line;
-
- pos = buf;
- while ((line = strsep(&pos, "\n"))) {
- if (pos != NULL || line[0] != '\0')
- info(udev, "'%s'(%s) '%s'\n", argv[0], *fd == fd_stdout ? "out" : "err" , line);
- }
- }
- } else if (ev[i].events & EPOLLHUP) {
- if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) {
- err = -errno;
- err(udev, "failed to remove fd from epoll: %m\n");
- goto out;
- }
- *fd = -1;
- }
- }
- }
-
- /* return the child's stdout string */
- if (result != NULL) {
- result[respos] = '\0';
- dbg(udev, "result='%s'\n", result);
- if (reslen != NULL)
- *reslen = respos;
- }
-out:
- if (fd_ep >= 0)
- close(fd_ep);
- return err;
-}
-
-int util_run_program(struct udev *udev, const char *command, char **envp,
- char *result, size_t ressize, size_t *reslen,
- const sigset_t *sigmask)
-{
- int status;
- int outpipe[2] = {-1, -1};
- int errpipe[2] = {-1, -1};
- pid_t pid;
- char arg[UTIL_PATH_SIZE];
- char program[UTIL_PATH_SIZE];
- char *argv[((sizeof(arg) + 1) / 2) + 1];
- int i;
- int err = 0;
-
- info(udev, "'%s' started\n", command);
-
- /* build argv from command */
- util_strscpy(arg, sizeof(arg), command);
- i = 0;
- if (strchr(arg, ' ') != NULL) {
- char *pos = arg;
-
- while (pos != NULL && pos[0] != '\0') {
- if (pos[0] == '\'') {
- /* do not separate quotes */
- pos++;
- argv[i] = strsep(&pos, "\'");
- if (pos != NULL)
- while (pos[0] == ' ')
- pos++;
- } else {
- argv[i] = strsep(&pos, " ");
- if (pos != NULL)
- while (pos[0] == ' ')
- pos++;
- }
- dbg(udev, "arg[%i] '%s'\n", i, argv[i]);
- i++;
- }
- argv[i] = NULL;
- } else {
- argv[0] = arg;
- argv[1] = NULL;
- }
-
- /* pipes from child to parent */
- if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe2(outpipe, O_NONBLOCK) != 0) {
- err = -errno;
- err(udev, "pipe failed: %m\n");
- goto out;
- }
- }
- if (udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe2(errpipe, O_NONBLOCK) != 0) {
- err = -errno;
- err(udev, "pipe failed: %m\n");
- goto out;
- }
- }
-
- /* allow programs in /lib/udev/ to be called without the path */
- if (argv[0][0] != '/') {
- util_strscpyl(program, sizeof(program), LIBEXECDIR "/", argv[0], NULL);
- argv[0] = program;
- }
-
- pid = fork();
- switch(pid) {
- case 0:
- /* child closes parent's ends of pipes */
- if (outpipe[READ_END] >= 0) {
- close(outpipe[READ_END]);
- outpipe[READ_END] = -1;
- }
- if (errpipe[READ_END] >= 0) {
- close(errpipe[READ_END]);
- errpipe[READ_END] = -1;
- }
-
- err = run_program_exec(udev, outpipe[WRITE_END], errpipe[WRITE_END], argv, envp, sigmask);
-
- _exit(1);
- case -1:
- err(udev, "fork of '%s' failed: %m\n", argv[0]);
- err = -1;
- goto out;
- default:
- /* parent closed child's ends of pipes */
- if (outpipe[WRITE_END] >= 0) {
- close(outpipe[WRITE_END]);
- outpipe[WRITE_END] = -1;
- }
- if (errpipe[WRITE_END] >= 0) {
- close(errpipe[WRITE_END]);
- errpipe[WRITE_END] = -1;
- }
-
- err = run_program_read(udev, outpipe[READ_END], errpipe[READ_END], argv, result, ressize, reslen);
-
- waitpid(pid, &status, 0);
- if (WIFEXITED(status)) {
- info(udev, "'%s' returned with exitcode %i\n", command, WEXITSTATUS(status));
- if (WEXITSTATUS(status) != 0)
- err = -1;
- } else {
- err(udev, "'%s' unexpected exit with status 0x%04x\n", command, status);
- err = -1;
- }
- }
-
-out:
- if (outpipe[READ_END] >= 0)
- close(outpipe[READ_END]);
- if (outpipe[WRITE_END] >= 0)
- close(outpipe[WRITE_END]);
- if (errpipe[READ_END] >= 0)
- close(errpipe[READ_END]);
- if (errpipe[WRITE_END] >= 0)
- close(errpipe[WRITE_END]);
- return err;
-}
#define USEC_PER_SEC 1000000ULL
#define NSEC_PER_USEC 1000ULL
-unsigned long long usec_monotonic(void)
+unsigned long long now_usec(void)
{
struct timespec ts;
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
-#include <signal.h>
#include <unistd.h>
#include <syslog.h>
#include <grp.h>
+#include <sys/signalfd.h>
#include "udev.h"
-static void sig_handler(int signum)
-{
- switch (signum) {
- case SIGALRM:
- _exit(1);
- case SIGINT:
- case SIGTERM:
- _exit(20 + signum);
- }
-}
-
int main(int argc, char *argv[])
{
struct udev *udev;
- struct udev_event *event;
- struct udev_device *dev;
- struct udev_rules *rules;
+ 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;
const char *subsystem;
- struct sigaction act;
- sigset_t mask;
+ sigset_t mask, sigmask_orig;
int err = -EINVAL;
udev = udev_new();
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
- /* set signal handlers */
- memset(&act, 0x00, sizeof(act));
- act.sa_handler = sig_handler;
- sigemptyset (&act.sa_mask);
- act.sa_flags = 0;
- sigaction(SIGALRM, &act, NULL);
- sigaction(SIGINT, &act, NULL);
- sigaction(SIGTERM, &act, NULL);
- sigemptyset(&mask);
- sigaddset(&mask, SIGALRM);
- sigaddset(&mask, SIGINT);
- sigaddset(&mask, SIGTERM);
- sigprocmask(SIG_UNBLOCK, &mask, NULL);
-
- /* trigger timeout to prevent hanging processes */
- alarm(UDEV_EVENT_TIMEOUT);
+ sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
action = getenv("ACTION");
devpath = getenv("DEVPATH");
if (action == NULL || subsystem == NULL || devpath == NULL) {
err(udev, "action, subsystem or devpath missing\n");
- goto exit;
+ goto out;
}
rules = udev_rules_new(udev, 1);
dev = udev_device_new_from_syspath(udev, syspath);
if (dev == NULL) {
info(udev, "unknown device '%s'\n", devpath);
- goto fail;
+ goto out;
}
/* skip reading of db, but read kernel parameters */
udev_device_set_action(dev, action);
event = udev_event_new(dev);
- err = udev_event_execute_rules(event, rules);
- /* rules may change/disable the timeout */
- if (udev_device_get_event_timeout(dev) >= 0)
- alarm(udev_device_get_event_timeout(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;
+ }
+ 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);
-fail:
udev_rules_unref(rules);
-exit:
udev_selinux_exit(udev);
udev_unref(udev);
if (err != 0)
#include <time.h>
#include <net/if.h>
#include <sys/ioctl.h>
+#include <sys/prctl.h>
+#include <sys/poll.h>
+#include <sys/epoll.h>
+#include <sys/wait.h>
#include <sys/socket.h>
+#include <sys/signalfd.h>
#include <linux/sockios.h>
#include "udev.h"
event->dev = dev;
event->udev = udev_device_get_udev(dev);
udev_list_init(&event->run_list);
+ event->fd_signal = -1;
+ event->birth_usec = now_usec();
+ event->timeout_usec = UDEV_EVENT_TIMEOUT_SEC * 1000 * 1000;
dbg(event->udev, "allocated event %p\n", event);
return event;
}
return l;
}
+static int spawn_exec(struct udev_event *event,
+ const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask,
+ int fd_stdout, int fd_stderr)
+{
+ struct udev *udev = event->udev;
+ int err;
+ int fd;
+
+ /* discard child output or connect to pipe */
+ fd = open("/dev/null", O_RDWR);
+ if (fd >= 0) {
+ dup2(fd, STDIN_FILENO);
+ if (fd_stdout < 0)
+ dup2(fd, STDOUT_FILENO);
+ if (fd_stderr < 0)
+ dup2(fd, STDERR_FILENO);
+ close(fd);
+ } else {
+ err(udev, "open /dev/null failed: %m\n");
+ }
+
+ /* connect pipes to std{out,err} */
+ if (fd_stdout >= 0) {
+ dup2(fd_stdout, STDOUT_FILENO);
+ close(fd_stdout);
+ }
+ if (fd_stderr >= 0) {
+ dup2(fd_stderr, STDERR_FILENO);
+ close(fd_stderr);
+ }
+
+ /* terminate child in case parent goes away */
+ prctl(PR_SET_PDEATHSIG, SIGTERM);
+
+ /* restore original udev sigmask before exec */
+ if (sigmask)
+ sigprocmask(SIG_SETMASK, sigmask, NULL);
+
+ execve(argv[0], argv, envp);
+
+ /* exec failed */
+ err = -errno;
+ err(udev, "exec of program '%s' failed\n", cmd);
+ return err;
+}
+
+static int spawn_read(struct udev_event *event,
+ const char *cmd,
+ int fd_stdout, int fd_stderr,
+ char *result, size_t ressize)
+{
+ struct udev *udev = event->udev;
+ size_t respos = 0;
+ int fd_ep = -1;
+ struct epoll_event ep_outpipe, ep_errpipe;
+ int err = 0;
+
+ /* read from child if requested */
+ if (fd_stdout < 0 && fd_stderr < 0)
+ return 0;
+
+ fd_ep = epoll_create1(EPOLL_CLOEXEC);
+ if (fd_ep < 0) {
+ err = -errno;
+ err(udev, "error creating epoll fd: %m\n");
+ goto out;
+ }
+
+ if (fd_stdout >= 0) {
+ memset(&ep_outpipe, 0, sizeof(struct epoll_event));
+ ep_outpipe.events = EPOLLIN;
+ ep_outpipe.data.ptr = &fd_stdout;
+ if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) {
+ err(udev, "fail to add fd to epoll: %m\n");
+ goto out;
+ }
+ }
+
+ if (fd_stderr >= 0) {
+ memset(&ep_errpipe, 0, sizeof(struct epoll_event));
+ ep_errpipe.events = EPOLLIN;
+ ep_errpipe.data.ptr = &fd_stderr;
+ if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) {
+ err(udev, "fail to add fd to epoll: %m\n");
+ goto out;
+ }
+ }
+
+ /* read child output */
+ while (fd_stdout >= 0 || fd_stderr >= 0) {
+ int timeout;
+ int fdcount;
+ struct epoll_event ev[4];
+ int i;
+
+ if (event->timeout_usec > 0) {
+ unsigned long long age_usec;
+
+ age_usec = now_usec() - event->birth_usec;
+ if (age_usec >= event->timeout_usec) {
+ err = -ETIMEDOUT;
+ err(udev, "timeout '%s'\n", cmd);
+ goto out;
+ }
+ timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
+ } else {
+ timeout = -1;
+ }
+
+ fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout);
+ if (fdcount < 0) {
+ if (errno == EINTR)
+ continue;
+ err = -errno;
+ err(udev, "failed to poll: %m\n");
+ goto out;
+ }
+ if (fdcount == 0) {
+ err = -ETIMEDOUT;
+ err(udev, "timeout '%s'\n", cmd);
+ goto out;
+ }
+
+ for (i = 0; i < fdcount; i++) {
+ int *fd = (int *)ev[i].data.ptr;
+
+ if (ev[i].events & EPOLLIN) {
+ ssize_t count;
+ char buf[4096];
+
+ count = read(*fd, buf, sizeof(buf)-1);
+ if (count <= 0)
+ continue;
+ buf[count] = '\0';
+
+ /* store stdout result */
+ if (result != NULL && *fd == fd_stdout) {
+ if (respos + count < ressize) {
+ memcpy(&result[respos], buf, count);
+ respos += count;
+ } else {
+ err(udev, "'%s' ressize %zd too short\n", cmd, ressize);
+ err = -ENOBUFS;
+ }
+ }
+
+ /* log debug output only if we watch stderr */
+ if (fd_stderr >= 0) {
+ char *pos;
+ char *line;
+
+ pos = buf;
+ while ((line = strsep(&pos, "\n"))) {
+ if (pos != NULL || line[0] != '\0')
+ info(udev, "'%s'(%s) '%s'\n", cmd, *fd == fd_stdout ? "out" : "err" , line);
+ }
+ }
+ } else if (ev[i].events & EPOLLHUP) {
+ if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) {
+ err = -errno;
+ err(udev, "failed to remove fd from epoll: %m\n");
+ goto out;
+ }
+ *fd = -1;
+ }
+ }
+ }
+
+ /* return the child's stdout string */
+ if (result != NULL) {
+ result[respos] = '\0';
+ dbg(udev, "result='%s'\n", result);
+ }
+out:
+ if (fd_ep >= 0)
+ close(fd_ep);
+ return err;
+}
+
+static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid)
+{
+ struct udev *udev = event->udev;
+ struct pollfd pfd[1];
+ int err = 0;
+
+ pfd[0].events = POLLIN;
+ pfd[0].fd = event->fd_signal;
+
+ while (pid > 0) {
+ int timeout;
+ int fdcount;
+
+ if (event->timeout_usec > 0) {
+ unsigned long long age_usec;
+
+ age_usec = now_usec() - event->birth_usec;
+ if (age_usec >= event->timeout_usec)
+ timeout = 1000;
+ else
+ timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
+ } else {
+ timeout = -1;
+ }
+
+ fdcount = poll(pfd, 1, timeout);
+ if (fdcount < 0) {
+ if (errno == EINTR)
+ continue;
+ err = -errno;
+ err(udev, "failed to poll: %m\n");
+ goto out;
+ }
+ if (fdcount == 0) {
+ err(udev, "timeout: killing '%s'[%u]\n", cmd, pid);
+ kill(pid, SIGKILL);
+ }
+
+ if (pfd[0].revents & POLLIN) {
+ struct signalfd_siginfo fdsi;
+ int status;
+ ssize_t size;
+
+ size = read(event->fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
+ if (size != sizeof(struct signalfd_siginfo))
+ continue;
+
+ switch (fdsi.ssi_signo) {
+ case SIGTERM:
+ event->sigterm = true;
+ break;
+ case SIGCHLD:
+ if (waitpid(pid, &status, WNOHANG) < 0)
+ break;
+ if (WIFEXITED(status)) {
+ info(udev, "'%s'[%u] returned with exitcode %i\n", cmd, pid, WEXITSTATUS(status));
+ if (WEXITSTATUS(status) != 0)
+ err = -1;
+ } else {
+ err(udev, "'%s'[%u] unexpected exit with status 0x%04x\n", cmd, pid, status);
+ err = -1;
+ }
+ pid = 0;
+ break;
+ }
+ }
+ }
+out:
+ return err;
+}
+
+int udev_event_spawn(struct udev_event *event,
+ const char *cmd, char **envp, const sigset_t *sigmask,
+ char *result, size_t ressize)
+{
+ struct udev *udev = event->udev;
+ int outpipe[2] = {-1, -1};
+ int errpipe[2] = {-1, -1};
+ pid_t pid;
+ char arg[UTIL_PATH_SIZE];
+ char program[UTIL_PATH_SIZE];
+ char *argv[((sizeof(arg) + 1) / 2) + 1];
+ int i;
+ int err = 0;
+
+ /* build argv from command */
+ util_strscpy(arg, sizeof(arg), cmd);
+ i = 0;
+ if (strchr(arg, ' ') != NULL) {
+ char *pos = arg;
+
+ while (pos != NULL && pos[0] != '\0') {
+ if (pos[0] == '\'') {
+ /* do not separate quotes */
+ pos++;
+ argv[i] = strsep(&pos, "\'");
+ if (pos != NULL)
+ while (pos[0] == ' ')
+ pos++;
+ } else {
+ argv[i] = strsep(&pos, " ");
+ if (pos != NULL)
+ while (pos[0] == ' ')
+ pos++;
+ }
+ dbg(udev, "arg[%i] '%s'\n", i, argv[i]);
+ i++;
+ }
+ argv[i] = NULL;
+ } else {
+ argv[0] = arg;
+ argv[1] = NULL;
+ }
+
+ /* pipes from child to parent */
+ if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
+ if (pipe2(outpipe, O_NONBLOCK) != 0) {
+ err = -errno;
+ err(udev, "pipe failed: %m\n");
+ goto out;
+ }
+ }
+ if (udev_get_log_priority(udev) >= LOG_INFO) {
+ if (pipe2(errpipe, O_NONBLOCK) != 0) {
+ err = -errno;
+ err(udev, "pipe failed: %m\n");
+ goto out;
+ }
+ }
+
+ /* allow programs in /lib/udev/ to be called without the path */
+ if (argv[0][0] != '/') {
+ util_strscpyl(program, sizeof(program), LIBEXECDIR "/", argv[0], NULL);
+ argv[0] = program;
+ }
+
+ pid = fork();
+ switch(pid) {
+ case 0:
+ /* child closes parent's ends of pipes */
+ if (outpipe[READ_END] >= 0) {
+ close(outpipe[READ_END]);
+ outpipe[READ_END] = -1;
+ }
+ if (errpipe[READ_END] >= 0) {
+ close(errpipe[READ_END]);
+ errpipe[READ_END] = -1;
+ }
+
+ info(udev, "starting '%s'\n", cmd);
+
+ err = spawn_exec(event, cmd, argv, envp, sigmask,
+ outpipe[WRITE_END], errpipe[WRITE_END]);
+
+ _exit(2 );
+ case -1:
+ err(udev, "fork of '%s' failed: %m\n", cmd);
+ err = -1;
+ goto out;
+ default:
+ /* parent closed child's ends of pipes */
+ if (outpipe[WRITE_END] >= 0) {
+ close(outpipe[WRITE_END]);
+ outpipe[WRITE_END] = -1;
+ }
+ if (errpipe[WRITE_END] >= 0) {
+ close(errpipe[WRITE_END]);
+ errpipe[WRITE_END] = -1;
+ }
+
+ err = spawn_read(event, cmd,
+ outpipe[READ_END], errpipe[READ_END],
+ result, ressize);
+
+ err = spawn_wait(event, cmd, pid);
+ }
+
+out:
+ if (outpipe[READ_END] >= 0)
+ close(outpipe[READ_END]);
+ if (outpipe[WRITE_END] >= 0)
+ close(outpipe[WRITE_END]);
+ if (errpipe[READ_END] >= 0)
+ close(errpipe[READ_END]);
+ if (errpipe[WRITE_END] >= 0)
+ close(errpipe[WRITE_END]);
+ return err;
+}
+
static void rename_netif_kernel_log(struct ifreq ifr)
{
int klog;
return err;
}
-int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
+int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigmask)
{
struct udev_device *dev = event->dev;
int err = 0;
if (major(udev_device_get_devnum(dev)) != 0)
udev_watch_end(event->udev, dev);
- udev_rules_apply_to_event(rules, event);
+ udev_rules_apply_to_event(rules, event, sigmask);
if (major(udev_device_get_devnum(dev)) != 0)
err = udev_node_remove(dev);
udev_watch_end(event->udev, event->dev_db);
}
- udev_rules_apply_to_event(rules, event);
+ udev_rules_apply_to_event(rules, event, sigmask);
/* rename a new network interface, if needed */
if (udev_device_get_ifindex(dev) > 0 && strcmp(udev_device_get_action(dev), "add") == 0 &&
if (event->dev_db != NULL && udev_device_get_usec_initialized(event->dev_db) > 0)
udev_device_set_usec_initialized(event->dev, udev_device_get_usec_initialized(event->dev_db));
else
- udev_device_set_usec_initialized(event->dev, usec_monotonic());
+ udev_device_set_usec_initialized(event->dev, now_usec());
/* (re)write database file */
udev_device_update_db(dev);
char program[UTIL_PATH_SIZE];
char **envp;
- udev_event_apply_format(event, cmd, program, sizeof(program));
- envp = udev_device_get_properties_envp(event->dev);
if (event->exec_delay > 0) {
info(event->udev, "delay execution of '%s'\n", program);
sleep(event->exec_delay);
}
- if (util_run_program(event->udev, program, envp, NULL, 0, NULL, sigmask) != 0) {
+
+ 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_flags(list_entry))
err = -1;
}
TK_M_PARENTS_MAX,
TK_M_TEST, /* val, mode_t */
+ TK_M_EVENT_TIMEOUT, /* int */
TK_M_PROGRAM, /* val */
TK_M_IMPORT_FILE, /* val */
TK_M_IMPORT_PROG, /* val */
TK_A_TAG, /* val */
TK_A_NAME, /* val */
TK_A_DEVLINK, /* val */
- TK_A_EVENT_TIMEOUT, /* int */
TK_A_ATTR, /* val, attr */
TK_A_RUN, /* val, bool */
TK_A_GOTO, /* size_t */
[TK_M_PARENTS_MAX] = "M PARENTS_MAX",
[TK_M_TEST] = "M TEST",
+ [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
[TK_M_PROGRAM] = "M PROGRAM",
[TK_M_IMPORT_FILE] = "M IMPORT_FILE",
[TK_M_IMPORT_PROG] = "M IMPORT_PROG",
[TK_A_TAG] = "A ENV",
[TK_A_NAME] = "A NAME",
[TK_A_DEVLINK] = "A DEVLINK",
- [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
[TK_A_ATTR] = "A ATTR",
[TK_A_RUN] = "A RUN",
[TK_A_GOTO] = "A GOTO",
case TK_A_STATIC_NODE:
dbg(rules->udev, "%s '%s'\n", token_str(type), value);
break;
- case TK_A_EVENT_TIMEOUT:
+ case TK_M_EVENT_TIMEOUT:
dbg(rules->udev, "%s %u\n", token_str(type), token->key.event_timeout);
break;
case TK_A_GOTO:
return 0;
}
-static int import_program_into_properties(struct udev_device *dev, const char *program)
+static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
{
- struct udev *udev = udev_device_get_udev(dev);
+ struct udev_device *dev = event->dev;
char **envp;
char result[UTIL_LINE_SIZE];
- size_t reslen;
char *line;
+ int err;
envp = udev_device_get_properties_envp(dev);
- if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
- return -1;
+ err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
+ if (err < 0)
+ return err;
line = result;
while (line != NULL) {
case TK_A_STATIC_NODE:
token->key.value_off = add_string(rule_tmp->rules, value);
break;
- case TK_A_EVENT_TIMEOUT:
+ case TK_M_EVENT_TIMEOUT:
token->key.event_timeout = *(int *)data;
break;
case TK_RULE:
if (pos != NULL) {
int tout = atoi(&pos[strlen("event_timeout=")]);
- rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, op, NULL, &tout);
+ rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
dbg(rules->udev, "event timeout=%i\n", tout);
}
ESCAPE_REPLACE,
};
-int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
+int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
{
struct token *cur;
struct token *rule;
goto nomatch;
break;
}
+ case TK_M_EVENT_TIMEOUT:
+ info(event->udev, "OPTIONS event_timeout=%u\n", cur->key.event_timeout);
+ event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
+ break;
case TK_M_PROGRAM:
{
char program[UTIL_PATH_SIZE];
program,
&rules->buf[rule->rule.filename_off],
rule->rule.filename_line);
- if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
+
+ if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
if (cur->key.op != OP_NOMATCH)
goto nomatch;
} else {
import,
&rules->buf[rule->rule.filename_off],
rule->rule.filename_line);
- if (import_program_into_properties(event->dev, import) != 0)
+
+ if (import_program_into_properties(event, import, sigmask) != 0)
if (cur->key.op != OP_NOMATCH)
goto nomatch;
break;
}
}
break;
- case TK_A_EVENT_TIMEOUT:
- udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
- break;
case TK_A_ATTR:
{
const char *key_name = &rules->buf[cur->key.attr_off];
#include "libudev.h"
#include "libudev-private.h"
-#define DEFAULT_FAKE_PARTITIONS_COUNT 15
-#define UDEV_EVENT_TIMEOUT 180
+#define UDEV_EVENT_TIMEOUT_SEC 120
#define UDEV_CTRL_SOCK_PATH "@/org/kernel/udev/udevd"
gid_t gid;
struct udev_list_node run_list;
int exec_delay;
+ unsigned long long birth_usec;
+ unsigned long long timeout_usec;
+ int fd_signal;
+ bool sigterm;
bool inotify_watch;
bool inotify_watch_final;
bool group_final;
struct udev_rules;
struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names);
void udev_rules_unref(struct udev_rules *rules);
-int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event);
+int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask);
void udev_rules_apply_static_dev_perms(struct udev_rules *rules);
/* udev-event.c */
struct udev_event *udev_event_new(struct udev_device *dev);
void udev_event_unref(struct udev_event *event);
-int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules);
-int udev_event_execute_run(struct udev_event *event, const sigset_t *sigset);
size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size);
int udev_event_apply_subsys_kernel(struct udev_event *event, const char *string,
char *result, size_t maxsize, int read_value);
+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);
/* udev-watch.c */
int udev_watch_init(struct udev *udev);
#include <signal.h>
#include <syslog.h>
#include <getopt.h>
+#include <sys/signalfd.h>
#include "udev.h"
int udevadm_test(struct udev *udev, int argc, char *argv[])
{
+ int resolve_names = 1;
char filename[UTIL_PATH_SIZE];
const char *action = "add";
const char *syspath = NULL;
- struct udev_event *event;
- struct udev_device *dev;
+ struct udev_event *event = NULL;
+ struct udev_device *dev = NULL;
struct udev_rules *rules = NULL;
struct udev_list_entry *entry;
+ sigset_t mask, sigmask_orig;
int err;
int rc = 0;
static const struct option options[] = {
{ "action", required_argument, NULL, 'a' },
+ { "resolve-names", required_argument, NULL, 'N' },
{ "help", no_argument, NULL, 'h' },
{}
};
for (;;) {
int option;
- option = getopt_long(argc, argv, "a:s:fh", options, NULL);
+ option = getopt_long(argc, argv, "a:s:N:fh", options, NULL);
if (option == -1)
break;
case 'a':
action = optarg;
break;
+ case 'N':
+ if (strcmp (optarg, "early") == 0) {
+ resolve_names = 1;
+ } else if (strcmp (optarg, "late") == 0) {
+ resolve_names = 0;
+ } else if (strcmp (optarg, "never") == 0) {
+ resolve_names = -1;
+ } else {
+ fprintf(stderr, "resolve-names must be early, late or never\n");
+ err(udev, "resolve-names must be early, late or never\n");
+ exit(EXIT_FAILURE);
+ }
+ break;
case 'h':
printf("Usage: udevadm test OPTIONS <syspath>\n"
" --action=<string> set action string\n"
" --help\n\n");
- exit(0);
+ exit(EXIT_SUCCESS);
default:
- exit(1);
+ exit(EXIT_FAILURE);
}
}
syspath = argv[optind];
if (syspath == NULL) {
fprintf(stderr, "syspath parameter missing\n");
- rc = 1;
- goto exit;
+ rc = 2;
+ goto out;
}
printf("This program is for debugging only, it does not run any program,\n"
"some values may be different, or not available at a simulation run.\n"
"\n");
- rules = udev_rules_new(udev, 1);
+ sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
+
+ rules = udev_rules_new(udev, resolve_names);
if (rules == NULL) {
fprintf(stderr, "error reading rules\n");
- rc = 1;
- goto exit;
+ rc = 3;
+ goto out;
}
/* add /sys if needed */
dev = udev_device_new_from_syspath(udev, filename);
if (dev == NULL) {
fprintf(stderr, "unable to open device '%s'\n", filename);
- rc = 2;
- goto exit;
+ rc = 4;
+ goto out;
}
/* skip reading of db, but read kernel parameters */
udev_device_set_action(dev, action);
event = udev_event_new(dev);
- err = udev_event_execute_rules(event, rules);
- if (udev_device_get_event_timeout(dev) >= 0)
- printf("custom event timeout: %i\n", udev_device_get_event_timeout(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");
+ rc = 5;
+ goto out;
+ }
+
+ err = udev_event_execute_rules(event, rules, &sigmask_orig);
udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
- if (err == 0)
+ if (err == 0) {
udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
char program[UTIL_PATH_SIZE];
udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program));
printf("run: '%s'\n", program);
}
+ }
+out:
+ if (event != NULL && event->fd_signal >= 0)
+ close(event->fd_signal);
udev_event_unref(event);
udev_device_unref(dev);
-exit:
udev_rules_unref(rules);
return rc;
}
static int children;
static int children_max;
static int exec_delay;
-static sigset_t orig_sigmask;
+static sigset_t sigmask_orig;
static UDEV_LIST(event_list);
static UDEV_LIST(worker_list);
static bool udev_exit;
for (;;) {
struct udev_event *udev_event;
- struct worker_message msg = {};
- int err;
+ struct worker_message msg;
int failed = 0;
+ int err;
info(udev, "seq %llu running\n", udev_device_get_seqnum(dev));
udev_event = udev_event_new(dev);
goto out;
}
- /* set timeout to prevent hanging processes */
- alarm(UDEV_EVENT_TIMEOUT);
+ /* needed for SIGCHLD/SIGTERM in spawn() */
+ udev_event->fd_signal = fd_signal;
if (exec_delay > 0)
udev_event->exec_delay = exec_delay;
/* apply rules, create node, symlinks */
- err = udev_event_execute_rules(udev_event, rules);
-
- /* rules may change/disable the timeout */
- if (udev_device_get_event_timeout(dev) >= 0)
- alarm(udev_device_get_event_timeout(dev));
+ err = udev_event_execute_rules(udev_event, rules, &sigmask_orig);
if (err == 0)
- failed = udev_event_execute_run(udev_event, &orig_sigmask);
-
- alarm(0);
+ failed = udev_event_execute_run(udev_event, &sigmask_orig);
/* apply/restore inotify watch */
if (err == 0 && udev_event->inotify_watch) {
udev_monitor_send_device(worker_monitor, NULL, dev);
/* send udevd the result of the event execution */
+ memset(&msg, 0, sizeof(struct worker_message));
if (err != 0)
msg.exitcode = err;
else if (failed != 0)
send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);
info(udev, "seq %llu processed with %i\n", udev_device_get_seqnum(dev), err);
- udev_event_unref(udev_event);
+
udev_device_unref(dev);
dev = NULL;
+ if (udev_event->sigterm) {
+ udev_event_unref(udev_event);
+ goto out;
+ }
+
+ udev_event_unref(udev_event);
+
/* wait for more device messages from main udevd, or term signal */
while (dev == NULL) {
struct epoll_event ev[4];
int i;
fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1);
- if (fdcount < 0)
- continue;
+ if (fdcount < 0) {
+ if (errno == EINTR)
+ continue;
+ err = -errno;
+ err(udev, "failed to poll: %m\n");
+ goto out;
+ }
for (i = 0; i < fdcount; i++) {
if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {
/* block and listen to all signals on signalfd */
sigfillset(&mask);
- sigprocmask(SIG_SETMASK, &mask, &orig_sigmask);
+ sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
if (fd_signal < 0) {
fprintf(stderr, "error creating signalfd\n");
projects / systemd / commitdiff