chiark / gitweb /
cleanup some debug output and move to info level + unify select() loops
authorKay Sievers <kay.sievers@suse.de>
Mon, 15 Aug 2005 09:57:04 +0000 (11:57 +0200)
committerKay Sievers <kay.sievers@suse.de>
Mon, 15 Aug 2005 09:57:04 +0000 (11:57 +0200)
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
13 files changed:
logging.h
udev.c
udev_add.c
udev_db.c
udev_libc_wrapper.h
udev_remove.c
udev_rules.c
udev_rules_parse.c
udev_utils_run.c
udevd.c
udeveventrecorder.c
udevmonitor.c
udevstart.c

index 0126de9..e0dcb80 100644 (file)
--- a/logging.h
+++ b/logging.h
 #undef err
 #define err(format, arg...)                                                    \
        do {                                                                    \
-               log_message(LOG_ERR ,"%s: " format ,__FILE__ ,## arg);          \
+               log_message(LOG_ERR ,"%s: " format ,__FUNCTION__ ,## arg);              \
        } while (0)
 
 #undef info
 #define info(format, arg...)                                                   \
        do {                                                                    \
-               log_message(LOG_INFO ,"%s: " format ,__FILE__ ,## arg);         \
+               log_message(LOG_INFO ,"%s: " format ,__FUNCTION__ ,## arg);             \
        } while (0)
 
 #ifdef DEBUG
diff --git a/udev.c b/udev.c
index f0b2800..beaa191 100644 (file)
--- a/udev.c
+++ b/udev.c
@@ -125,11 +125,10 @@ int main(int argc, char *argv[], char *envp[])
 
                dbg("executing run list");
                list_for_each_entry(name_loop, &udev.run_list, node) {
-                       info("RUN key executes '%s'", name_loop->name);
                        if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
                                pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
                        else
-                               run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_DEBUG));
+                               run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
                }
        }
 
index 9d872bf..9420b4f 100644 (file)
@@ -215,7 +215,7 @@ static int create_node(struct udevice *udev, struct sysfs_class_device *class_de
 
                strlcat(linktarget, &udev->name[tail], sizeof(linktarget));
 
-               dbg("symlink(%s, %s)", linktarget, filename);
+               info("creating symlink '%s' to '%s'", filename, linktarget);
                if (!udev->test_run) {
                        unlink(filename);
                        selinux_setfscreatecon(filename, NULL, S_IFLNK);
index ac5a7e6..632f6f7 100644 (file)
--- a/udev_db.c
+++ b/udev_db.c
@@ -113,7 +113,7 @@ static int parse_db_file(struct udevice *udev, const char *filename)
        size_t count;
 
        if (file_map(filename, &buf, &bufsize) != 0) {
-               err("unable to read db file '%s'", filename);
+               dbg("no db file to read '%s'", filename);
                return -1;
        }
 
index a12af64..9dd2217 100644 (file)
 #ifndef _UDEV_LIBC_WRAPPER_H_
 #define _UDEV_LIBC_WRAPPER_H_
 
+#include <string.h>
+#include <unistd.h>
+#include <linux/types.h>
+
+/* needed for our signal handlers to work */
 #undef asmlinkage
 #ifdef __i386__
 #define asmlinkage     __attribute__((regparm(0)))
@@ -29,6 +34,7 @@
 #define asmlinkage
 #endif
 
+/* headers are broken on some lazy platforms */
 #ifndef __FD_SET
 #define __FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
 #endif
 #define __FD_ZERO(set) ((void) memset ((void*) (set), 0, sizeof (fd_set)))
 #endif
 
+/* missing in some lazy distros */
 #ifndef NETLINK_KOBJECT_UEVENT
 #define NETLINK_KOBJECT_UEVENT 15
 #endif
 
-#include <string.h>
-
 #ifdef __KLIBC__
 static inline int clearenv(void)
 {
index 28885d4..cff940c 100644 (file)
@@ -88,7 +88,7 @@ static int delete_node(struct udevice *udev)
                        continue;;
                }
 
-               dbg("removing symlink '%s'", filename);
+               info("removing symlink '%s'", filename);
                unlink(filename);
 
                if (strchr(filename, '/'))
index 791e98e..7ecca94 100644 (file)
@@ -222,7 +222,7 @@ static int import_program_into_env(struct udevice *udev, const char *program)
        char result[1024];
        size_t reslen;
 
-       if (run_program(program, udev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_DEBUG)) != 0)
+       if (run_program(program, udev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
                return -1;
        return import_keys_into_env(udev, result, reslen);
 }
@@ -808,7 +808,6 @@ try_parent:
                apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
                dbg("check for IMPORT import='%s'", import);
                if (rule->import_type == IMPORT_PROGRAM) {
-                       info("IMPORT executes '%s'", import);
                        rc = import_program_into_env(udev, import);
                } else if (rule->import_type == IMPORT_FILE) {
                        dbg("import file import='%s'", import);
@@ -833,8 +832,7 @@ try_parent:
 
                strlcpy(program, key_val(rule, &rule->program), sizeof(program));
                apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
-               info("PROGRAM key executes '%s", program);
-               if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_DEBUG)) != 0) {
+               if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
                        dbg("PROGRAM is false");
                        udev->program_result[0] = '\0';
                        if (rule->program.operation != KEY_OP_NOMATCH)
@@ -964,7 +962,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct s
                                }
                                strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
                                apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
-                               info("rule applied, added symlink '%s'", temp);
+                               dbg("rule applied, added symlink '%s'", temp);
 
                                /* add multiple symlinks separated by spaces */
                                pos = temp;
index 488b7a7..c14164f 100644 (file)
@@ -642,7 +642,13 @@ int udev_rules_init(struct udev_rules *rules, int read_compiled, int resolve_nam
                retval = add_matching_files(&name_list, udev_rules_filename, RULEFILE_SUFFIX);
 
                list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
-                       parse_file(rules, name_loop->name);
+                       if (stat(name_loop->name, &stats) == 0) {
+                               if (stats.st_size)
+                                       parse_file(rules, name_loop->name);
+                               else
+                                       dbg("empty rules file '%s'", name_loop->name);
+                       } else
+                               dbg("could not read '%s'", name_loop->name);
                        list_del(&name_loop->node);
                        free(name_loop);
                }
index cf63366..0ee36d6 100644 (file)
@@ -46,7 +46,8 @@ int pass_env_to_socket(const char *sockname, const char *devpath, const char *ac
        char buf[2048];
        size_t bufpos = 0;
        int i;
-       int retval;
+       ssize_t count;
+       int retval = 0;
 
        dbg("pass environment to socket '%s'", sockname);
        sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
@@ -63,23 +64,23 @@ int pass_env_to_socket(const char *sockname, const char *devpath, const char *ac
                bufpos++;
        }
 
-       retval = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, addrlen);
-       if (retval != -1)
-               retval = 0;
+       count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, addrlen);
+       if (count < 0)
+               retval = -1;
+       info("passed %zi bytes to socket '%s', ", count, sockname);
 
        close(sock);
        return retval;
 }
 
 int run_program(const char *command, const char *subsystem,
-               char *result, size_t ressize, size_t *reslen, int dbg)
+               char *result, size_t ressize, size_t *reslen, int log)
 {
        int retval = 0;
        int status;
        int outpipe[2] = {-1, -1};
        int errpipe[2] = {-1, -1};
        pid_t pid;
-       char *pos;
        char arg[PATH_SIZE];
        char *argv[(sizeof(arg) / 2) + 1];
        int devnull;
@@ -88,7 +89,7 @@ int run_program(const char *command, const char *subsystem,
        strlcpy(arg, command, sizeof(arg));
        i = 0;
        if (strchr(arg, ' ')) {
-               pos = arg;
+               char *pos = arg;
                while (pos != NULL) {
                        if (pos[0] == '\'') {
                                /* don't separate if in apostrophes */
@@ -103,22 +104,22 @@ int run_program(const char *command, const char *subsystem,
                        i++;
                }
                argv[i] = NULL;
-               dbg("execute '%s' with parsed arguments", arg);
+               info("'%s'", command);
        } else {
                argv[0] = arg;
                argv[1] = (char *) subsystem;
                argv[2] = NULL;
-               dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
+               info("'%s' '%s'", arg, argv[1]);
        }
 
        /* prepare pipes from child to parent */
-       if (result || dbg) {
+       if (result || log) {
                if (pipe(outpipe) != 0) {
                        err("pipe failed");
                        return -1;
                }
        }
-       if (dbg) {
+       if (log) {
                if (pipe(errpipe) != 0) {
                        err("pipe failed");
                        return -1;
@@ -149,13 +150,13 @@ int run_program(const char *command, const char *subsystem,
                        dup2(outpipe[1], STDOUT_FILENO);
                if (errpipe[1] > 0)
                        dup2(errpipe[1], STDERR_FILENO);
-               execv(arg, argv);
+               execv(argv[0], argv);
 
                /* we should never reach this */
                err("exec of program failed");
                _exit(1);
        case -1:
-               err("fork of '%s' failed", arg);
+               err("fork of '%s' failed", argv[0]);
                return -1;
        default:
                /* read from child if requested */
@@ -190,6 +191,8 @@ int run_program(const char *command, const char *subsystem,
                                /* get stdout */
                                if (outpipe[0] > 0 && FD_ISSET(outpipe[0], &readfds)) {
                                        char inbuf[1024];
+                                       char *pos;
+                                       char *line;
 
                                        count = read(outpipe[0], inbuf, sizeof(inbuf)-1);
                                        if (count <= 0) {
@@ -202,22 +205,28 @@ int run_program(const char *command, const char *subsystem,
                                                continue;
                                        }
                                        inbuf[count] = '\0';
-                                       dbg("stdout: '%s'", inbuf);
 
+                                       /* store result for rule processing */
                                        if (result) {
-                                               if (respos + count >= ressize) {
+                                               if (respos + count < ressize) {
+                                                       memcpy(&result[respos], inbuf, count);
+                                                       respos += count;
+                                               } else {
                                                        err("ressize %ld too short", (long)ressize);
                                                        retval = -1;
-                                                       continue;
                                                }
-                                               memcpy(&result[respos], inbuf, count);
-                                               respos += count;
                                        }
+                                       pos = inbuf;
+                                       while ((line = strsep(&pos, "\n")))
+                                               if (pos || line[0] != '\0')
+                                                       info("'%s' (stdout) '%s'", argv[0], line);
                                }
 
                                /* get stderr */
                                if (errpipe[0] > 0 && FD_ISSET(errpipe[0], &readfds)) {
                                        char errbuf[1024];
+                                       char *pos;
+                                       char *line;
 
                                        count = read(errpipe[0], errbuf, sizeof(errbuf)-1);
                                        if (count <= 0) {
@@ -228,7 +237,10 @@ int run_program(const char *command, const char *subsystem,
                                                continue;
                                        }
                                        errbuf[count] = '\0';
-                                       dbg("stderr: '%s'", errbuf);
+                                       pos = errbuf;
+                                       while ((line = strsep(&pos, "\n")))
+                                               if (pos || line[0] != '\0')
+                                                       info("'%s' (stderr) '%s'", argv[0], line);
                                }
                        }
                        if (outpipe[0] > 0)
@@ -245,8 +257,12 @@ int run_program(const char *command, const char *subsystem,
                        }
                }
                waitpid(pid, &status, 0);
-               if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
-                       dbg("exec program status 0x%x", status);
+               if (WIFEXITED(status)) {
+                       info("'%s' returned with status %i", argv[0], WEXITSTATUS(status));
+                       if (WEXITSTATUS(status) != 0)
+                               retval = -1;
+               } else {
+                       err("'%s' abnormal exit", argv[0]);
                        retval = -1;
                }
        }
diff --git a/udevd.c b/udevd.c
index 8423278..79d3e82 100644 (file)
--- a/udevd.c
+++ b/udevd.c
@@ -30,6 +30,7 @@
 #include <ctype.h>
 #include <dirent.h>
 #include <fcntl.h>
+#include <syslog.h>
 #include <sys/select.h>
 #include <sys/wait.h>
 #include <sys/time.h>
@@ -62,21 +63,16 @@ static volatile int udev_exit;
 static int init_phase = 1;
 static int run_exec_q;
 static int stop_exec_q;
-
-static LIST_HEAD(msg_list);
-static LIST_HEAD(exec_list);
-static LIST_HEAD(running_list);
-
-static void exec_queue_manager(void);
-static void msg_queue_manager(void);
-static void user_sighandler(void);
-static void reap_sigchilds(void);
-
 static char *udev_bin;
-static unsigned long long expected_seqnum;
 static int event_timeout;
 static int max_childs;
 static int max_childs_running;
+static unsigned long long expected_seqnum;
+static char log[32];
+
+static LIST_HEAD(msg_list);
+static LIST_HEAD(exec_list);
+static LIST_HEAD(running_list);
 
 
 #ifdef USE_LOG
@@ -138,7 +134,8 @@ static void msg_queue_insert(struct uevent_msg *msg)
 
        /* don't delay messages with timeout set */
        if (msg->timeout) {
-               dbg("move seq %llu with timeout %u to exec queue", msg->seqnum, msg->timeout);
+               info("seq %llu with timeout %u seconds will be execute without queuing, '%s' '%s'",
+                    msg->seqnum, msg->timeout, msg->action, msg->devpath);
                list_add(&msg->node, &exec_list);
                run_exec_q = 1;
                return;
@@ -156,7 +153,7 @@ static void msg_queue_insert(struct uevent_msg *msg)
                }
        }
        list_add(&msg->node, &loop_msg->node);
-       info("seq %llu queued, devpath '%s'", msg->seqnum, msg->devpath);
+       info("seq %llu queued, '%s' '%s'", msg->seqnum, msg->action, msg->devpath);
 
        /* run msg queue manager */
        run_msg_q = 1;
@@ -165,7 +162,7 @@ static void msg_queue_insert(struct uevent_msg *msg)
 }
 
 /* forks event and removes event from run queue when finished */
-static void udev_event_fork(struct uevent_msg *msg)
+static void udev_event_run(struct uevent_msg *msg)
 {
        char *const argv[] = { "udev", msg->subsystem, NULL };
        pid_t pid;
@@ -190,8 +187,8 @@ static void udev_event_fork(struct uevent_msg *msg)
        default:
                /* get SIGCHLD in main loop */
                sysinfo(&info);
-               info("seq %llu forked, pid %d, %ld seconds old",
-                    msg->seqnum, pid, info.uptime - msg->queue_time);
+               info("seq %llu forked, pid [%d], '%s' '%s', %ld seconds old",
+                    msg->seqnum, pid,  msg->action, msg->subsystem, info.uptime - msg->queue_time);
                msg->pid = pid;
        }
 }
@@ -385,7 +382,7 @@ static void exec_queue_manager(void)
                if (running_with_devpath(loop_msg, max_childs) == 0) {
                        /* move event to run list */
                        list_move_tail(&loop_msg->node, &running_list);
-                       udev_event_fork(loop_msg);
+                       udev_event_run(loop_msg);
                        running++;
                        dbg("moved seq %llu to running list", loop_msg->seqnum);
                } else
@@ -441,7 +438,7 @@ recheck:
        msg_dump_queue();
 
        /* set timeout for remaining queued events */
-       if (list_empty(&msg_list) == 0) {
+       if (!list_empty(&msg_list)) {
                struct itimerval itv = {{0, 0}, {timeout - msg_age, 0}};
                dbg("next event expires in %li seconds", timeout - msg_age);
                setitimer(ITIMER_REAL, &itv, NULL);
@@ -550,7 +547,7 @@ static struct uevent_msg *get_udevd_msg(void)
        switch (usend_msg.type) {
        case UDEVD_UEVENT_UDEVSEND:
        case UDEVD_UEVENT_INITSEND:
-               info("udevd event message received");
+               dbg("udevd event message received");
                envbuf_size = size - offsetof(struct udevd_msg, envbuf);
                dbg("envbuf_size=%i", envbuf_size);
                msg = get_msg_from_envbuf(usend_msg.envbuf, envbuf_size);
@@ -571,6 +568,8 @@ static struct uevent_msg *get_udevd_msg(void)
                intval = (int *) usend_msg.envbuf;
                info("udevd message (SET_LOG_PRIORITY) received, udev_log_priority=%i", *intval);
                udev_log_priority = *intval;
+               sprintf(log, "UDEV_LOG=%i", udev_log_priority);
+               putenv(log);
                break;
        case UDEVD_SET_MAX_CHILDS:
                intval = (int *) usend_msg.envbuf;
@@ -658,7 +657,7 @@ static void asmlinkage sig_handler(int signum)
         * which will wakeup our mainloop
         */
        if (!sig_flag) {
-               rc = write(pipefds[1],&signum,sizeof(signum));
+               rc = write(pipefds[1], &signum, sizeof(signum));
                if (rc >= 0)
                        sig_flag = 1;
        }
@@ -688,27 +687,13 @@ static void udev_done(int pid)
 
 static void reap_sigchilds(void)
 {
-       while(1) {
-               int pid = waitpid(-1, NULL, WNOHANG);
-               if ((pid == -1) || (pid == 0))
-                       break;
-               udev_done(pid);
-       }
-}
-
-/* just read everything from the pipe and clear the flag,
- * the flags was set in the signal handler
- */
-static void user_sighandler(void)
-{
-       int sig;
+       pid_t pid;
 
-       while(1) {
-               int rc = read(pipefds[0], &sig, sizeof(sig));
-               if (rc < 0)
+       while (1) {
+               pid = waitpid(-1, NULL, WNOHANG);
+               if (pid <= 0)
                        break;
-
-               sig_flag = 0;
+               udev_done(pid);
        }
 }
 
@@ -783,7 +768,6 @@ static int init_uevent_netlink_sock(void)
 
 int main(int argc, char *argv[], char *envp[])
 {
-       int maxsockplus;
        int retval;
        int devnull;
        struct sigaction act;
@@ -813,6 +797,7 @@ int main(int argc, char *argv[], char *envp[])
                        stop_exec_q = 1;
                }
        }
+
        if (daemonize) {
                pid_t pid;
 
@@ -856,7 +841,6 @@ int main(int argc, char *argv[], char *envp[])
                err("error getting pipes: %s", strerror(errno));
                goto exit;
        }
-
        retval = fcntl(pipefds[0], F_SETFL, O_NONBLOCK);
        if (retval < 0) {
                err("error fcntl on read pipe: %s", strerror(errno));
@@ -865,7 +849,6 @@ int main(int argc, char *argv[], char *envp[])
        retval = fcntl(pipefds[0], F_SETFD, FD_CLOEXEC);
        if (retval < 0)
                err("error fcntl on read pipe: %s", strerror(errno));
-
        retval = fcntl(pipefds[1], F_SETFL, O_NONBLOCK);
        if (retval < 0) {
                err("error fcntl on write pipe: %s", strerror(errno));
@@ -886,10 +869,6 @@ int main(int argc, char *argv[], char *envp[])
        sigaction(SIGCHLD, &act, NULL);
        sigaction(SIGHUP, &act, NULL);
 
-       if (init_uevent_netlink_sock() < 0) {
-               dbg("uevent socket not available");
-       }
-
        if (init_udevd_socket() < 0) {
                if (errno == EADDRINUSE)
                        dbg("another udevd running, exit");
@@ -899,6 +878,9 @@ int main(int argc, char *argv[], char *envp[])
                goto exit;
        }
 
+       if (init_uevent_netlink_sock() < 0)
+               info("uevent socket not available");
+
        /* override of forked udev binary, used for testing */
        udev_bin = getenv("UDEV_BIN");
        if (udev_bin != NULL)
@@ -937,26 +919,29 @@ int main(int argc, char *argv[], char *envp[])
                max_childs_running = UDEVD_MAX_CHILDS_RUNNING;
        info("initialize max_childs_running to %u", max_childs_running);
 
-       FD_ZERO(&readfds);
-       FD_SET(udevd_sock, &readfds);
-       if (uevent_netlink_sock > 0)
-               FD_SET(uevent_netlink_sock, &readfds);
-       FD_SET(pipefds[0], &readfds);
-       maxsockplus = udevd_sock+1;
+       /* export log_priority , as called programs may want to follow that setting */
+       sprintf(log, "UDEV_LOG=%i", udev_log_priority);
+       putenv(log);
+
        while (!udev_exit) {
                struct uevent_msg *msg;
+               int fdcount;
 
-               fd_set workreadfds = readfds;
-               retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
+               FD_ZERO(&readfds);
+               FD_SET(pipefds[0], &readfds);
+               FD_SET(udevd_sock, &readfds);
+               if (uevent_netlink_sock > 0)
+                       FD_SET(uevent_netlink_sock, &readfds);
 
-               if (retval < 0) {
+               fdcount = select(UDEV_MAX(udevd_sock, uevent_netlink_sock)+1, &readfds, NULL, NULL, NULL);
+               if (fdcount < 0) {
                        if (errno != EINTR)
                                dbg("error in select: %s", strerror(errno));
                        continue;
                }
 
                /* get user socket message */
-               if (FD_ISSET(udevd_sock, &workreadfds)) {
+               if (FD_ISSET(udevd_sock, &readfds)) {
                        msg = get_udevd_msg();
                        if (msg) {
                                /* discard kernel messages if netlink is active */
@@ -970,7 +955,7 @@ int main(int argc, char *argv[], char *envp[])
                }
 
                /* get kernel netlink message */
-               if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
+               if ((uevent_netlink_sock > 0) && FD_ISSET(uevent_netlink_sock, &readfds)) {
                        msg = get_netlink_msg();
                        if (msg) {
                                msg_queue_insert(msg);
@@ -983,8 +968,17 @@ int main(int argc, char *argv[], char *envp[])
                }
 
                /* received a signal, clear our notification pipe */
-               if (FD_ISSET(pipefds[0], &workreadfds))
-                       user_sighandler();
+               if (FD_ISSET(pipefds[0], &readfds)) {
+                       int sig;
+                       ssize_t rlen;
+
+                       while(1) {
+                               rlen = read(pipefds[0], &sig, sizeof(sig));
+                               if (rlen <= 0)
+                                       break;
+                       }
+                       sig_flag = 0;
+               }
 
                /* forked child have returned */
                if (sigchilds_waiting) {
@@ -1018,7 +1012,6 @@ exit:
 
        if (udevd_sock > 0)
                close(udevd_sock);
-
        if (uevent_netlink_sock > 0)
                close(uevent_netlink_sock);
 
index 711f467..9a3c3e1 100644 (file)
@@ -63,7 +63,7 @@ int main(int argc, char **argv, char **envp)
        const char *env;
 
        if (stat("/events", &sb) || !(S_ISDIR(sb.st_mode)))
-               return 1;
+               return 0;
 
        env = getenv("UDEV_LOG");
        if (env)
index 2efb705..c153888 100644 (file)
@@ -105,7 +105,7 @@ int main(int argc, char *argv[])
        int env = 0;
        fd_set readfds;
        int i;
-       int retval;
+       int retval = 0;
 
        for (i = 1 ; i < argc; i++) {
                char *arg = argv[i];
@@ -128,34 +128,34 @@ int main(int argc, char *argv[])
                exit(1);
        }
 
+       retval = init_udev_monitor_socket();
+       if (retval)
+               goto out;
        init_uevent_netlink_sock();
-       init_udev_monitor_socket();
 
        printf("udevmonitor prints received from the kernel [UEVENT] and after\n"
               "the udev processing, the event which udev [UDEV] has generated\n\n");
 
-       FD_ZERO(&readfds);
-       if (uevent_netlink_sock > 0)
-               FD_SET(uevent_netlink_sock, &readfds);
-       if (udev_monitor_sock > 0)
-               FD_SET(udev_monitor_sock, &readfds);
-
        while (1) {
                static char buf[UEVENT_BUFFER_SIZE*2];
                ssize_t buflen;
-               fd_set workreadfds;
+               int fdcount;
 
                buflen = 0;
-               workreadfds = readfds;
-
-               retval = select(UDEV_MAX(uevent_netlink_sock, udev_monitor_sock)+1, &workreadfds, NULL, NULL, NULL);
-               if (retval < 0) {
+               FD_ZERO(&readfds);
+               if (uevent_netlink_sock > 0)
+                       FD_SET(uevent_netlink_sock, &readfds);
+               if (udev_monitor_sock > 0)
+                       FD_SET(udev_monitor_sock, &readfds);
+
+               fdcount = select(UDEV_MAX(uevent_netlink_sock, udev_monitor_sock)+1, &readfds, NULL, NULL, NULL);
+               if (fdcount < 0) {
                        if (errno != EINTR)
                                fprintf(stderr, "error receiving uevent message\n");
                        continue;
                }
 
-               if ((uevent_netlink_sock > 0) && FD_ISSET(uevent_netlink_sock, &workreadfds)) {
+               if ((uevent_netlink_sock > 0) && FD_ISSET(uevent_netlink_sock, &readfds)) {
                        buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
                        if (buflen <=  0) {
                                fprintf(stderr, "error receiving uevent message\n");
@@ -164,7 +164,7 @@ int main(int argc, char *argv[])
                        printf("UEVENT[%i] %s\n", time(NULL), buf);
                }
 
-               if ((udev_monitor_sock > 0) && FD_ISSET(udev_monitor_sock, &workreadfds)) {
+               if ((udev_monitor_sock > 0) && FD_ISSET(udev_monitor_sock, &readfds)) {
                        buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
                        if (buflen <=  0) {
                                fprintf(stderr, "error receiving udev message\n");
@@ -198,9 +198,11 @@ int main(int argc, char *argv[])
                }
        }
 
+out:
        if (uevent_netlink_sock > 0)
                close(uevent_netlink_sock);
        if (udev_monitor_sock > 0)
                close(udev_monitor_sock);
-       exit(1);
+
+       return retval;
 }
index 3a715a6..ce96f38 100644 (file)
@@ -167,7 +167,7 @@ run:
                        if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
                                pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, "add");
                        else
-                               run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_DEBUG));
+                               run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
                }
        }
 exit: