diff options
Diffstat (limited to 'src/udev-event.c')
| -rw-r--r-- | src/udev-event.c | 1816 |
1 files changed, 908 insertions, 908 deletions
diff --git a/src/udev-event.c b/src/udev-event.c index 859d811bff..9bdc5186df 100644 --- a/src/udev-event.c +++ b/src/udev-event.c @@ -38,968 +38,968 @@ struct udev_event *udev_event_new(struct udev_device *dev) { - struct udev *udev = udev_device_get_udev(dev); - struct udev_event *event; - - event = calloc(1, sizeof(struct udev_event)); - if (event == NULL) - return NULL; - event->dev = dev; - event->udev = udev; - udev_list_init(udev, &event->run_list, false); - event->fd_signal = -1; - event->birth_usec = now_usec(); - event->timeout_usec = 60 * 1000 * 1000; - dbg(event->udev, "allocated event %p\n", event); - return event; + struct udev *udev = udev_device_get_udev(dev); + struct udev_event *event; + + event = calloc(1, sizeof(struct udev_event)); + if (event == NULL) + return NULL; + event->dev = dev; + event->udev = udev; + udev_list_init(udev, &event->run_list, false); + event->fd_signal = -1; + event->birth_usec = now_usec(); + event->timeout_usec = 60 * 1000 * 1000; + dbg(event->udev, "allocated event %p\n", event); + return event; } void udev_event_unref(struct udev_event *event) { - if (event == NULL) - return; - udev_list_cleanup(&event->run_list); - free(event->program_result); - free(event->name); - dbg(event->udev, "free event %p\n", event); - free(event); + if (event == NULL) + return; + udev_list_cleanup(&event->run_list); + free(event->program_result); + free(event->name); + dbg(event->udev, "free event %p\n", event); + free(event); } size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size) { - struct udev_device *dev = event->dev; - enum subst_type { - SUBST_UNKNOWN, - SUBST_DEVNODE, - SUBST_ATTR, - SUBST_ENV, - SUBST_KERNEL, - SUBST_KERNEL_NUMBER, - SUBST_DRIVER, - SUBST_DEVPATH, - SUBST_ID, - SUBST_MAJOR, - SUBST_MINOR, - SUBST_RESULT, - SUBST_PARENT, - SUBST_NAME, - SUBST_LINKS, - SUBST_ROOT, - SUBST_SYS, - }; - static const struct subst_map { - char *name; - char fmt; - enum subst_type type; - } map[] = { - { .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE }, - { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE }, - { .name = "attr", .fmt = 's', .type = SUBST_ATTR }, - { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR }, - { .name = "env", .fmt = 'E', .type = SUBST_ENV }, - { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL }, - { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, - { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER }, - { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, - { .name = "id", .fmt = 'b', .type = SUBST_ID }, - { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, - { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, - { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, - { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, - { .name = "name", .fmt = 'D', .type = SUBST_NAME }, - { .name = "links", .fmt = 'L', .type = SUBST_LINKS }, - { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, - { .name = "sys", .fmt = 'S', .type = SUBST_SYS }, - }; - const char *from; - char *s; - size_t l; - - from = src; - s = dest; - l = size; - - for (;;) { - enum subst_type type = SUBST_UNKNOWN; - char attrbuf[UTIL_PATH_SIZE]; - char *attr = NULL; - - while (from[0] != '\0') { - if (from[0] == '$') { - /* substitute named variable */ - unsigned int i; - - if (from[1] == '$') { - from++; - goto copy; - } - - for (i = 0; i < ARRAY_SIZE(map); i++) { - if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) { - type = map[i].type; - from += strlen(map[i].name)+1; - dbg(event->udev, "will substitute format name '%s'\n", map[i].name); - goto subst; - } - } - } else if (from[0] == '%') { - /* substitute format char */ - unsigned int i; - - if (from[1] == '%') { - from++; - goto copy; - } - - for (i = 0; i < ARRAY_SIZE(map); i++) { - if (from[1] == map[i].fmt) { - type = map[i].type; - from += 2; - dbg(event->udev, "will substitute format char '%c'\n", map[i].fmt); - goto subst; - } - } - } + struct udev_device *dev = event->dev; + enum subst_type { + SUBST_UNKNOWN, + SUBST_DEVNODE, + SUBST_ATTR, + SUBST_ENV, + SUBST_KERNEL, + SUBST_KERNEL_NUMBER, + SUBST_DRIVER, + SUBST_DEVPATH, + SUBST_ID, + SUBST_MAJOR, + SUBST_MINOR, + SUBST_RESULT, + SUBST_PARENT, + SUBST_NAME, + SUBST_LINKS, + SUBST_ROOT, + SUBST_SYS, + }; + static const struct subst_map { + char *name; + char fmt; + enum subst_type type; + } map[] = { + { .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE }, + { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE }, + { .name = "attr", .fmt = 's', .type = SUBST_ATTR }, + { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR }, + { .name = "env", .fmt = 'E', .type = SUBST_ENV }, + { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL }, + { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER }, + { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER }, + { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH }, + { .name = "id", .fmt = 'b', .type = SUBST_ID }, + { .name = "major", .fmt = 'M', .type = SUBST_MAJOR }, + { .name = "minor", .fmt = 'm', .type = SUBST_MINOR }, + { .name = "result", .fmt = 'c', .type = SUBST_RESULT }, + { .name = "parent", .fmt = 'P', .type = SUBST_PARENT }, + { .name = "name", .fmt = 'D', .type = SUBST_NAME }, + { .name = "links", .fmt = 'L', .type = SUBST_LINKS }, + { .name = "root", .fmt = 'r', .type = SUBST_ROOT }, + { .name = "sys", .fmt = 'S', .type = SUBST_SYS }, + }; + const char *from; + char *s; + size_t l; + + from = src; + s = dest; + l = size; + + for (;;) { + enum subst_type type = SUBST_UNKNOWN; + char attrbuf[UTIL_PATH_SIZE]; + char *attr = NULL; + + while (from[0] != '\0') { + if (from[0] == '$') { + /* substitute named variable */ + unsigned int i; + + if (from[1] == '$') { + from++; + goto copy; + } + + for (i = 0; i < ARRAY_SIZE(map); i++) { + if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) { + type = map[i].type; + from += strlen(map[i].name)+1; + dbg(event->udev, "will substitute format name '%s'\n", map[i].name); + goto subst; + } + } + } else if (from[0] == '%') { + /* substitute format char */ + unsigned int i; + + if (from[1] == '%') { + from++; + goto copy; + } + + for (i = 0; i < ARRAY_SIZE(map); i++) { + if (from[1] == map[i].fmt) { + type = map[i].type; + from += 2; + dbg(event->udev, "will substitute format char '%c'\n", map[i].fmt); + goto subst; + } + } + } copy: - /* copy char */ - if (l == 0) - goto out; - s[0] = from[0]; - from++; - s++; - l--; - } - - goto out; + /* copy char */ + if (l == 0) + goto out; + s[0] = from[0]; + from++; + s++; + l--; + } + + goto out; subst: - /* extract possible $format{attr} */ - if (from[0] == '{') { - unsigned int i; - - from++; - for (i = 0; from[i] != '}'; i++) { - if (from[i] == '\0') { - err(event->udev, "missing closing brace for format '%s'\n", src); - goto out; - } - } - if (i >= sizeof(attrbuf)) - goto out; - memcpy(attrbuf, from, i); - attrbuf[i] = '\0'; - from += i+1; - attr = attrbuf; - } else { - attr = NULL; - } - - switch (type) { - case SUBST_DEVPATH: - l = util_strpcpy(&s, l, udev_device_get_devpath(dev)); - dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev)); - break; - case SUBST_KERNEL: - l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); - dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev)); - break; - case SUBST_KERNEL_NUMBER: - if (udev_device_get_sysnum(dev) == NULL) - break; - l = util_strpcpy(&s, l, udev_device_get_sysnum(dev)); - dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev)); - break; - case SUBST_ID: - if (event->dev_parent == NULL) - break; - l = util_strpcpy(&s, l, udev_device_get_sysname(event->dev_parent)); - dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent)); - break; - case SUBST_DRIVER: { - const char *driver; - - if (event->dev_parent == NULL) - break; - - driver = udev_device_get_driver(event->dev_parent); - if (driver == NULL) - break; - l = util_strpcpy(&s, l, driver); - dbg(event->udev, "substitute driver '%s'\n", driver); - break; - } - case SUBST_MAJOR: { - char num[UTIL_PATH_SIZE]; - - sprintf(num, "%d", major(udev_device_get_devnum(dev))); - l = util_strpcpy(&s, l, num); - dbg(event->udev, "substitute major number '%s'\n", num); - break; - } - case SUBST_MINOR: { - char num[UTIL_PATH_SIZE]; - - sprintf(num, "%d", minor(udev_device_get_devnum(dev))); - l = util_strpcpy(&s, l, num); - dbg(event->udev, "substitute minor number '%s'\n", num); - break; - } - case SUBST_RESULT: { - char *rest; - int i; - - if (event->program_result == NULL) - break; - /* get part part of the result string */ - i = 0; - if (attr != NULL) - i = strtoul(attr, &rest, 10); - if (i > 0) { - char result[UTIL_PATH_SIZE]; - char tmp[UTIL_PATH_SIZE]; - char *cpos; - - dbg(event->udev, "request part #%d of result string\n", i); - util_strscpy(result, sizeof(result), event->program_result); - cpos = result; - while (--i) { - while (cpos[0] != '\0' && !isspace(cpos[0])) - cpos++; - while (isspace(cpos[0])) - cpos++; - } - if (i > 0) { - err(event->udev, "requested part of result string not found\n"); - break; - } - util_strscpy(tmp, sizeof(tmp), cpos); - /* %{2+}c copies the whole string from the second part on */ - if (rest[0] != '+') { - cpos = strchr(tmp, ' '); - if (cpos) - cpos[0] = '\0'; - } - l = util_strpcpy(&s, l, tmp); - dbg(event->udev, "substitute part of result string '%s'\n", tmp); - } else { - l = util_strpcpy(&s, l, event->program_result); - dbg(event->udev, "substitute result string '%s'\n", event->program_result); - } - break; - } - case SUBST_ATTR: { - const char *value = NULL; - char vbuf[UTIL_NAME_SIZE]; - size_t len; - int count; - - if (attr == NULL) { - err(event->udev, "missing file parameter for attr\n"); - break; - } - - /* try to read the value specified by "[dmi/id]product_name" */ - if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0) - value = vbuf; - - /* try to read the attribute the device */ - if (value == NULL) - value = udev_device_get_sysattr_value(event->dev, attr); - - /* try to read the attribute of the parent device, other matches have selected */ - if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev) - value = udev_device_get_sysattr_value(event->dev_parent, attr); - - if (value == NULL) - break; - - /* strip trailing whitespace, and replace unwanted characters */ - if (value != vbuf) - util_strscpy(vbuf, sizeof(vbuf), value); - len = strlen(vbuf); - while (len > 0 && isspace(vbuf[--len])) - vbuf[len] = '\0'; - count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); - if (count > 0) - info(event->udev, "%i character(s) replaced\n" , count); - l = util_strpcpy(&s, l, vbuf); - dbg(event->udev, "substitute sysfs value '%s'\n", vbuf); - break; - } - case SUBST_PARENT: { - struct udev_device *dev_parent; - const char *devnode; - - dev_parent = udev_device_get_parent(event->dev); - if (dev_parent == NULL) - break; - devnode = udev_device_get_devnode(dev_parent); - if (devnode != NULL) { - size_t devlen = strlen(udev_get_dev_path(event->udev))+1; - - l = util_strpcpy(&s, l, &devnode[devlen]); - dbg(event->udev, "found parent '%s', got node name '%s'\n", - udev_device_get_syspath(dev_parent), &devnode[devlen]); - } - break; - } - case SUBST_DEVNODE: - if (udev_device_get_devnode(dev) != NULL) - l = util_strpcpy(&s, l, udev_device_get_devnode(dev)); - break; - case SUBST_NAME: - if (event->name != NULL) { - l = util_strpcpy(&s, l, event->name); - dbg(event->udev, "substitute name '%s'\n", event->name); - } else { - l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); - dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev)); - } - break; - case SUBST_LINKS: { - size_t devlen = strlen(udev_get_dev_path(event->udev))+1; - struct udev_list_entry *list_entry; - - list_entry = udev_device_get_devlinks_list_entry(dev); - if (list_entry == NULL) - break; - l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]); - udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) - l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL); - break; - } - case SUBST_ROOT: - l = util_strpcpy(&s, l, udev_get_dev_path(event->udev)); - dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev)); - break; - case SUBST_SYS: - l = util_strpcpy(&s, l, udev_get_sys_path(event->udev)); - dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev)); - break; - case SUBST_ENV: - if (attr == NULL) { - dbg(event->udev, "missing attribute\n"); - break; - } else { - const char *value; - - value = udev_device_get_property_value(event->dev, attr); - if (value == NULL) - break; - dbg(event->udev, "substitute env '%s=%s'\n", attr, value); - l = util_strpcpy(&s, l, value); - break; - } - default: - err(event->udev, "unknown substitution type=%i\n", type); - break; - } - } + /* extract possible $format{attr} */ + if (from[0] == '{') { + unsigned int i; + + from++; + for (i = 0; from[i] != '}'; i++) { + if (from[i] == '\0') { + err(event->udev, "missing closing brace for format '%s'\n", src); + goto out; + } + } + if (i >= sizeof(attrbuf)) + goto out; + memcpy(attrbuf, from, i); + attrbuf[i] = '\0'; + from += i+1; + attr = attrbuf; + } else { + attr = NULL; + } + + switch (type) { + case SUBST_DEVPATH: + l = util_strpcpy(&s, l, udev_device_get_devpath(dev)); + dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev)); + break; + case SUBST_KERNEL: + l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); + dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev)); + break; + case SUBST_KERNEL_NUMBER: + if (udev_device_get_sysnum(dev) == NULL) + break; + l = util_strpcpy(&s, l, udev_device_get_sysnum(dev)); + dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev)); + break; + case SUBST_ID: + if (event->dev_parent == NULL) + break; + l = util_strpcpy(&s, l, udev_device_get_sysname(event->dev_parent)); + dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent)); + break; + case SUBST_DRIVER: { + const char *driver; + + if (event->dev_parent == NULL) + break; + + driver = udev_device_get_driver(event->dev_parent); + if (driver == NULL) + break; + l = util_strpcpy(&s, l, driver); + dbg(event->udev, "substitute driver '%s'\n", driver); + break; + } + case SUBST_MAJOR: { + char num[UTIL_PATH_SIZE]; + + sprintf(num, "%d", major(udev_device_get_devnum(dev))); + l = util_strpcpy(&s, l, num); + dbg(event->udev, "substitute major number '%s'\n", num); + break; + } + case SUBST_MINOR: { + char num[UTIL_PATH_SIZE]; + + sprintf(num, "%d", minor(udev_device_get_devnum(dev))); + l = util_strpcpy(&s, l, num); + dbg(event->udev, "substitute minor number '%s'\n", num); + break; + } + case SUBST_RESULT: { + char *rest; + int i; + + if (event->program_result == NULL) + break; + /* get part part of the result string */ + i = 0; + if (attr != NULL) + i = strtoul(attr, &rest, 10); + if (i > 0) { + char result[UTIL_PATH_SIZE]; + char tmp[UTIL_PATH_SIZE]; + char *cpos; + + dbg(event->udev, "request part #%d of result string\n", i); + util_strscpy(result, sizeof(result), event->program_result); + cpos = result; + while (--i) { + while (cpos[0] != '\0' && !isspace(cpos[0])) + cpos++; + while (isspace(cpos[0])) + cpos++; + } + if (i > 0) { + err(event->udev, "requested part of result string not found\n"); + break; + } + util_strscpy(tmp, sizeof(tmp), cpos); + /* %{2+}c copies the whole string from the second part on */ + if (rest[0] != '+') { + cpos = strchr(tmp, ' '); + if (cpos) + cpos[0] = '\0'; + } + l = util_strpcpy(&s, l, tmp); + dbg(event->udev, "substitute part of result string '%s'\n", tmp); + } else { + l = util_strpcpy(&s, l, event->program_result); + dbg(event->udev, "substitute result string '%s'\n", event->program_result); + } + break; + } + case SUBST_ATTR: { + const char *value = NULL; + char vbuf[UTIL_NAME_SIZE]; + size_t len; + int count; + + if (attr == NULL) { + err(event->udev, "missing file parameter for attr\n"); + break; + } + + /* try to read the value specified by "[dmi/id]product_name" */ + if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0) + value = vbuf; + + /* try to read the attribute the device */ + if (value == NULL) + value = udev_device_get_sysattr_value(event->dev, attr); + + /* try to read the attribute of the parent device, other matches have selected */ + if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev) + value = udev_device_get_sysattr_value(event->dev_parent, attr); + + if (value == NULL) + break; + + /* strip trailing whitespace, and replace unwanted characters */ + if (value != vbuf) + util_strscpy(vbuf, sizeof(vbuf), value); + len = strlen(vbuf); + while (len > 0 && isspace(vbuf[--len])) + vbuf[len] = '\0'; + count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); + if (count > 0) + info(event->udev, "%i character(s) replaced\n" , count); + l = util_strpcpy(&s, l, vbuf); + dbg(event->udev, "substitute sysfs value '%s'\n", vbuf); + break; + } + case SUBST_PARENT: { + struct udev_device *dev_parent; + const char *devnode; + + dev_parent = udev_device_get_parent(event->dev); + if (dev_parent == NULL) + break; + devnode = udev_device_get_devnode(dev_parent); + if (devnode != NULL) { + size_t devlen = strlen(udev_get_dev_path(event->udev))+1; + + l = util_strpcpy(&s, l, &devnode[devlen]); + dbg(event->udev, "found parent '%s', got node name '%s'\n", + udev_device_get_syspath(dev_parent), &devnode[devlen]); + } + break; + } + case SUBST_DEVNODE: + if (udev_device_get_devnode(dev) != NULL) + l = util_strpcpy(&s, l, udev_device_get_devnode(dev)); + break; + case SUBST_NAME: + if (event->name != NULL) { + l = util_strpcpy(&s, l, event->name); + dbg(event->udev, "substitute name '%s'\n", event->name); + } else { + l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); + dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev)); + } + break; + case SUBST_LINKS: { + size_t devlen = strlen(udev_get_dev_path(event->udev))+1; + struct udev_list_entry *list_entry; + + list_entry = udev_device_get_devlinks_list_entry(dev); + if (list_entry == NULL) + break; + l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]); + udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) + l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL); + break; + } + case SUBST_ROOT: + l = util_strpcpy(&s, l, udev_get_dev_path(event->udev)); + dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev)); + break; + case SUBST_SYS: + l = util_strpcpy(&s, l, udev_get_sys_path(event->udev)); + dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev)); + break; + case SUBST_ENV: + if (attr == NULL) { + dbg(event->udev, "missing attribute\n"); + break; + } else { + const char *value; + + value = udev_device_get_property_value(event->dev, attr); + if (value == NULL) + break; + dbg(event->udev, "substitute env '%s=%s'\n", attr, value); + l = util_strpcpy(&s, l, value); + break; + } + default: + err(event->udev, "unknown substitution type=%i\n", type); + break; + } + } out: - s[0] = '\0'; - dbg(event->udev, "'%s' -> '%s' (%zu)\n", src, dest, l); - return l; + s[0] = '\0'; + dbg(event->udev, "'%s' -> '%s' (%zu)\n", src, dest, l); + 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) + 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, "failed to execute '%s' '%s': %m\n", argv[0], cmd); - return err; + 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, "failed to execute '%s' '%s': %m\n", argv[0], cmd); + return err; } static void spawn_read(struct udev_event *event, - const char *cmd, - int fd_stdout, int fd_stderr, - char *result, size_t ressize) + 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; - - /* read from child if requested */ - if (fd_stdout < 0 && fd_stderr < 0) - return; - - fd_ep = epoll_create1(EPOLL_CLOEXEC); - if (fd_ep < 0) { - 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(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(udev, "failed to poll: %m\n"); - goto out; - } - if (fdcount == 0) { - 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); - } - } - - /* 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(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); - } + struct udev *udev = event->udev; + size_t respos = 0; + int fd_ep = -1; + struct epoll_event ep_outpipe, ep_errpipe; + + /* read from child if requested */ + if (fd_stdout < 0 && fd_stderr < 0) + return; + + fd_ep = epoll_create1(EPOLL_CLOEXEC); + if (fd_ep < 0) { + 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(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(udev, "failed to poll: %m\n"); + goto out; + } + if (fdcount == 0) { + 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); + } + } + + /* 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(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); + if (fd_ep >= 0) + close(fd_ep); } 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] exit with return code %i\n", cmd, pid, WEXITSTATUS(status)); - if (WEXITSTATUS(status) != 0) - err = -1; - } else if (WIFSIGNALED(status)) { - err(udev, "'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status))); - err = -1; - } else if (WIFSTOPPED(status)) { - err(udev, "'%s' [%u] stopped\n", cmd, pid); - err = -1; - } else if (WIFCONTINUED(status)) { - err(udev, "'%s' [%u] continued\n", cmd, pid); - err = -1; - } else { - err(udev, "'%s' [%u] exit with status 0x%04x\n", cmd, pid, status); - err = -1; - } - pid = 0; - break; - } - } - } + 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] exit with return code %i\n", cmd, pid, WEXITSTATUS(status)); + if (WEXITSTATUS(status) != 0) + err = -1; + } else if (WIFSIGNALED(status)) { + err(udev, "'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status))); + err = -1; + } else if (WIFSTOPPED(status)) { + err(udev, "'%s' [%u] stopped\n", cmd, pid); + err = -1; + } else if (WIFCONTINUED(status)) { + err(udev, "'%s' [%u] continued\n", cmd, pid); + err = -1; + } else { + err(udev, "'%s' [%u] exit with status 0x%04x\n", cmd, pid, status); + err = -1; + } + pid = 0; + break; + } + } + } out: - return err; + return err; } int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) { - int i = 0; - char *pos; - - if (strchr(cmd, ' ') == NULL) { - argv[i++] = cmd; - goto out; - } - - pos = cmd; - 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, "argv[%i] '%s'\n", i, argv[i]); - i++; - } + int i = 0; + char *pos; + + if (strchr(cmd, ' ') == NULL) { + argv[i++] = cmd; + goto out; + } + + pos = cmd; + 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, "argv[%i] '%s'\n", i, argv[i]); + i++; + } out: - argv[i] = NULL; - if (argc) - *argc = i; - return 0; + argv[i] = NULL; + if (argc) + *argc = i; + return 0; } int udev_event_spawn(struct udev_event *event, - const char *cmd, char **envp, const sigset_t *sigmask, - char *result, size_t ressize) + 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 *argv[128]; - char program[UTIL_PATH_SIZE]; - int err = 0; - - util_strscpy(arg, sizeof(arg), cmd); - udev_build_argv(event->udev, arg, NULL, argv); - - /* 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 /usr/lib/udev/ to be called without the path */ - if (argv[0][0] != '/') { - util_strscpyl(program, sizeof(program), PKGLIBEXECDIR "/", 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; - } - - spawn_read(event, cmd, - outpipe[READ_END], errpipe[READ_END], - result, ressize); - - err = spawn_wait(event, cmd, pid); - } + struct udev *udev = event->udev; + int outpipe[2] = {-1, -1}; + int errpipe[2] = {-1, -1}; + pid_t pid; + char arg[UTIL_PATH_SIZE]; + char *argv[128]; + char program[UTIL_PATH_SIZE]; + int err = 0; + + util_strscpy(arg, sizeof(arg), cmd); + udev_build_argv(event->udev, arg, NULL, argv); + + /* 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 /usr/lib/udev/ to be called without the path */ + if (argv[0][0] != '/') { + util_strscpyl(program, sizeof(program), PKGLIBEXECDIR "/", 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; + } + + 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; + 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; - FILE *f; - - klog = open("/dev/kmsg", O_WRONLY); - if (klog < 0) - return; - - f = fdopen(klog, "w"); - if (f == NULL) { - close(klog); - return; - } - - fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n", - getpid(), ifr.ifr_name, ifr.ifr_newname); - fclose(f); + int klog; + FILE *f; + + klog = open("/dev/kmsg", O_WRONLY); + if (klog < 0) + return; + + f = fdopen(klog, "w"); + if (f == NULL) { + close(klog); + return; + } + + fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n", + getpid(), ifr.ifr_name, ifr.ifr_newname); + fclose(f); } static int rename_netif(struct udev_event *event) { - struct udev_device *dev = event->dev; - int sk; - struct ifreq ifr; - int loop; - int err; - - info(event->udev, "changing net interface name from '%s' to '%s'\n", - udev_device_get_sysname(dev), event->name); - - sk = socket(PF_INET, SOCK_DGRAM, 0); - if (sk < 0) { - err = -errno; - err(event->udev, "error opening socket: %m\n"); - return err; - } - - memset(&ifr, 0x00, sizeof(struct ifreq)); - util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev)); - util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); - err = ioctl(sk, SIOCSIFNAME, &ifr); - if (err == 0) { - rename_netif_kernel_log(ifr); - goto out; - } - - /* keep trying if the destination interface name already exists */ - err = -errno; - if (err != -EEXIST) - goto out; - - /* free our own name, another process may wait for us */ - snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev)); - err = ioctl(sk, SIOCSIFNAME, &ifr); - if (err < 0) { - err = -errno; - goto out; - } - - /* log temporary name */ - rename_netif_kernel_log(ifr); - - /* wait a maximum of 90 seconds for our target to become available */ - util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname); - util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); - loop = 90 * 20; - while (loop--) { - const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 }; - - dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n", - event->name, (90 * 20) - loop); - nanosleep(&duration, NULL); - - err = ioctl(sk, SIOCSIFNAME, &ifr); - if (err == 0) { - rename_netif_kernel_log(ifr); - break; - } - err = -errno; - if (err != -EEXIST) - break; - } + struct udev_device *dev = event->dev; + int sk; + struct ifreq ifr; + int loop; + int err; + + info(event->udev, "changing net interface name from '%s' to '%s'\n", + udev_device_get_sysname(dev), event->name); + + sk = socket(PF_INET, SOCK_DGRAM, 0); + if (sk < 0) { + err = -errno; + err(event->udev, "error opening socket: %m\n"); + return err; + } + + memset(&ifr, 0x00, sizeof(struct ifreq)); + util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev)); + util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); + err = ioctl(sk, SIOCSIFNAME, &ifr); + if (err == 0) { + rename_netif_kernel_log(ifr); + goto out; + } + + /* keep trying if the destination interface name already exists */ + err = -errno; + if (err != -EEXIST) + goto out; + + /* free our own name, another process may wait for us */ + snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev)); + err = ioctl(sk, SIOCSIFNAME, &ifr); + if (err < 0) { + err = -errno; + goto out; + } + + /* log temporary name */ + rename_netif_kernel_log(ifr); + + /* wait a maximum of 90 seconds for our target to become available */ + util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname); + util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); + loop = 90 * 20; + while (loop--) { + const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 }; + + dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n", + event->name, (90 * 20) - loop); + nanosleep(&duration, NULL); + + err = ioctl(sk, SIOCSIFNAME, &ifr); + if (err == 0) { + rename_netif_kernel_log(ifr); + break; + } + err = -errno; + if (err != -EEXIST) + break; + } out: - if (err < 0) - err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname); - close(sk); - return err; + if (err < 0) + err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname); + close(sk); + return err; } 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 (udev_device_get_subsystem(dev) == NULL) - return -1; - - if (strcmp(udev_device_get_action(dev), "remove") == 0) { - udev_device_read_db(dev, NULL); - udev_device_delete_db(dev); - udev_device_tag_index(dev, NULL, false); - - if (major(udev_device_get_devnum(dev)) != 0) - udev_watch_end(event->udev, dev); - - udev_rules_apply_to_event(rules, event, sigmask); - - if (major(udev_device_get_devnum(dev)) != 0) - err = udev_node_remove(dev); - } else { - event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev)); - if (event->dev_db != NULL) { - udev_device_read_db(event->dev_db, NULL); - udev_device_set_info_loaded(event->dev_db); - - /* disable watch during event processing */ - if (major(udev_device_get_devnum(dev)) != 0) - udev_watch_end(event->udev, event->dev_db); - } - - 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 && - event->name != NULL && strcmp(event->name, udev_device_get_sysname(dev)) != 0) { - char syspath[UTIL_PATH_SIZE]; - char *pos; - - err = rename_netif(event); - if (err == 0) { - info(event->udev, "renamed netif to '%s'\n", event->name); - - /* remember old name */ - udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev)); - - /* now change the devpath, because the kernel device name has changed */ - util_strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev)); - pos = strrchr(syspath, '/'); - if (pos != NULL) { - pos++; - util_strscpy(pos, sizeof(syspath) - (pos - syspath), event->name); - udev_device_set_syspath(event->dev, syspath); - udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev)); - info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev)); - } - } - } - - if (major(udev_device_get_devnum(dev)) != 0) { - /* remove/update possible left-over symlinks from old database entry */ - if (event->dev_db != NULL) - udev_node_update_old_links(dev, event->dev_db); - - if (!event->mode_set) { - if (udev_device_get_devnode_mode(dev) > 0) { - /* kernel supplied value */ - event->mode = udev_device_get_devnode_mode(dev); - } else if (event->gid > 0) { - /* default 0660 if a group is assigned */ - event->mode = 0660; - } else { - /* default 0600 */ - event->mode = 0600; - } - } - - err = udev_node_add(dev, event->mode, event->uid, event->gid); - } - - /* preserve old, or get new initialization timestamp */ - 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 if (udev_device_get_usec_initialized(event->dev) == 0) - udev_device_set_usec_initialized(event->dev, now_usec()); - - /* (re)write database file */ - udev_device_update_db(dev); - udev_device_tag_index(dev, event->dev_db, true); - udev_device_set_is_initialized(dev); - - udev_device_unref(event->dev_db); - event->dev_db = NULL; - } + struct udev_device *dev = event->dev; + int err = 0; + + if (udev_device_get_subsystem(dev) == NULL) + return -1; + + if (strcmp(udev_device_get_action(dev), "remove") == 0) { + udev_device_read_db(dev, NULL); + udev_device_delete_db(dev); + udev_device_tag_index(dev, NULL, false); + + if (major(udev_device_get_devnum(dev)) != 0) + udev_watch_end(event->udev, dev); + + udev_rules_apply_to_event(rules, event, sigmask); + + if (major(udev_device_get_devnum(dev)) != 0) + err = udev_node_remove(dev); + } else { + event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev)); + if (event->dev_db != NULL) { + udev_device_read_db(event->dev_db, NULL); + udev_device_set_info_loaded(event->dev_db); + + /* disable watch during event processing */ + if (major(udev_device_get_devnum(dev)) != 0) + udev_watch_end(event->udev, event->dev_db); + } + + 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 && + event->name != NULL && strcmp(event->name, udev_device_get_sysname(dev)) != 0) { + char syspath[UTIL_PATH_SIZE]; + char *pos; + + err = rename_netif(event); + if (err == 0) { + info(event->udev, "renamed netif to '%s'\n", event->name); + + /* remember old name */ + udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev)); + + /* now change the devpath, because the kernel device name has changed */ + util_strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev)); + pos = strrchr(syspath, '/'); + if (pos != NULL) { + pos++; + util_strscpy(pos, sizeof(syspath) - (pos - syspath), event->name); + udev_device_set_syspath(event->dev, syspath); + udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev)); + info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev)); + } + } + } + + if (major(udev_device_get_devnum(dev)) != 0) { + /* remove/update possible left-over symlinks from old database entry */ + if (event->dev_db != NULL) + udev_node_update_old_links(dev, event->dev_db); + + if (!event->mode_set) { + if (udev_device_get_devnode_mode(dev) > 0) { + /* kernel supplied value */ + event->mode = udev_device_get_devnode_mode(dev); + } else if (event->gid > 0) { + /* default 0660 if a group is assigned */ + event->mode = 0660; + } else { + /* default 0600 */ + event->mode = 0600; + } + } + + err = udev_node_add(dev, event->mode, event->uid, event->gid); + } + + /* preserve old, or get new initialization timestamp */ + 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 if (udev_device_get_usec_initialized(event->dev) == 0) + udev_device_set_usec_initialized(event->dev, now_usec()); + + /* (re)write database file */ + udev_device_update_db(dev); + udev_device_tag_index(dev, event->dev_db, true); + udev_device_set_is_initialized(dev); + + udev_device_unref(event->dev_db); + event->dev_db = NULL; + } out: - return err; + return err; } int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask) { - struct udev_list_entry *list_entry; - int err = 0; - - dbg(event->udev, "executing run list\n"); - udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) { - const char *cmd = udev_list_entry_get_name(list_entry); - - if (strncmp(cmd, "socket:", strlen("socket:")) == 0) { - struct udev_monitor *monitor; - - monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]); - if (monitor == NULL) - continue; - udev_monitor_send_device(monitor, NULL, event->dev); - udev_monitor_unref(monitor); - } else { - char program[UTIL_PATH_SIZE]; - char **envp; - - if (event->exec_delay > 0) { - info(event->udev, "delay execution of '%s'\n", program); - sleep(event->exec_delay); - } - - 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; - } - } - } - return err; + struct udev_list_entry *list_entry; + int err = 0; + + dbg(event->udev, "executing run list\n"); + udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) { + const char *cmd = udev_list_entry_get_name(list_entry); + + if (strncmp(cmd, "socket:", strlen("socket:")) == 0) { + struct udev_monitor *monitor; + + monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]); + if (monitor == NULL) + continue; + udev_monitor_send_device(monitor, NULL, event->dev); + udev_monitor_unref(monitor); + } else { + char program[UTIL_PATH_SIZE]; + char **envp; + + if (event->exec_delay > 0) { + info(event->udev, "delay execution of '%s'\n", program); + sleep(event->exec_delay); + } + + 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; + } + } + } + return err; } |