X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fudev%2Fudev-event.c;h=ef9fc61c641fea622daced336540ff70e185a72a;hp=debda61eed653ec7d561720a742fcf535a6361ae;hb=22582bb2cbe85b40de5f561589e0468dac769515;hpb=04a9d3a00a9290cbf254d0b0ba2ce4521be632ae diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c index debda61ee..ef9fc61c6 100644 --- a/src/udev/udev-event.c +++ b/src/udev/udev-event.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2010 Kay Sievers + * Copyright (C) 2003-2013 Kay Sievers * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -48,7 +48,7 @@ struct udev_event *udev_event_new(struct udev_device *dev) event->udev = udev; udev_list_init(udev, &event->run_list, false); event->fd_signal = -1; - event->birth_usec = now_usec(); + event->birth_usec = now(CLOCK_MONOTONIC); event->timeout_usec = 30 * 1000 * 1000; return event; } @@ -90,24 +90,24 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char * const 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 }, + { .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; @@ -132,8 +132,8 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char * goto copy; } - for (i = 0; i < ARRAY_SIZE(map); i++) { - if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) { + for (i = 0; i < ELEMENTSOF(map); i++) { + if (startswith(&from[1], map[i].name)) { type = map[i].type; from += strlen(map[i].name)+1; goto subst; @@ -148,7 +148,7 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char * goto copy; } - for (i = 0; i < ARRAY_SIZE(map); i++) { + for (i = 0; i < ELEMENTSOF(map); i++) { if (from[1] == map[i].fmt) { type = map[i].type; from += 2; @@ -191,20 +191,20 @@ subst: switch (type) { case SUBST_DEVPATH: - l = util_strpcpy(&s, l, udev_device_get_devpath(dev)); + l = strpcpy(&s, l, udev_device_get_devpath(dev)); break; case SUBST_KERNEL: - l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); + l = strpcpy(&s, l, 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)); + l = strpcpy(&s, l, 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)); + l = strpcpy(&s, l, udev_device_get_sysname(event->dev_parent)); break; case SUBST_DRIVER: { const char *driver; @@ -215,21 +215,21 @@ subst: driver = udev_device_get_driver(event->dev_parent); if (driver == NULL) break; - l = util_strpcpy(&s, l, driver); + l = strpcpy(&s, l, 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); + l = strpcpy(&s, l, 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); + l = strpcpy(&s, l, num); break; } case SUBST_RESULT: { @@ -247,7 +247,7 @@ subst: char tmp[UTIL_PATH_SIZE]; char *cpos; - util_strscpy(result, sizeof(result), event->program_result); + strscpy(result, sizeof(result), event->program_result); cpos = result; while (--i) { while (cpos[0] != '\0' && !isspace(cpos[0])) @@ -259,16 +259,16 @@ subst: log_error("requested part of result string not found\n"); break; } - util_strscpy(tmp, sizeof(tmp), cpos); + 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); + l = strpcpy(&s, l, tmp); } else { - l = util_strpcpy(&s, l, event->program_result); + l = strpcpy(&s, l, event->program_result); } break; } @@ -300,14 +300,14 @@ subst: /* strip trailing whitespace, and replace unwanted characters */ if (value != vbuf) - util_strscpy(vbuf, sizeof(vbuf), value); + 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) log_debug("%i character(s) replaced\n" , count); - l = util_strpcpy(&s, l, vbuf); + l = strpcpy(&s, l, vbuf); break; } case SUBST_PARENT: { @@ -318,46 +318,38 @@ subst: 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]); - } + if (devnode != NULL) + l = strpcpy(&s, l, devnode + strlen("/dev/")); break; } case SUBST_DEVNODE: if (udev_device_get_devnode(dev) != NULL) - l = util_strpcpy(&s, l, udev_device_get_devnode(dev)); + l = strpcpy(&s, l, udev_device_get_devnode(dev)); break; - case SUBST_NAME: { - if (event->name != NULL) { - l = util_strpcpy(&s, l, event->name); - } else if (udev_device_get_devnode(dev) != NULL) { - size_t devlen = strlen(udev_get_dev_path(event->udev))+1; - - l = util_strpcpy(&s, l, &udev_device_get_devnode(dev)[devlen]); - } else { - l = util_strpcpy(&s, l, udev_device_get_sysname(dev)); - } + case SUBST_NAME: + if (event->name != NULL) + l = strpcpy(&s, l, event->name); + else if (udev_device_get_devnode(dev) != NULL) + l = strpcpy(&s, l, udev_device_get_devnode(dev) + strlen("/dev/")); + else + l = strpcpy(&s, l, 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]); + l = strpcpy(&s, l, udev_list_entry_get_name(list_entry) + strlen("/dev/")); 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); + l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry) + strlen("/dev/"), NULL); break; } case SUBST_ROOT: - l = util_strpcpy(&s, l, udev_get_dev_path(event->udev)); + l = strpcpy(&s, l, "/dev"); break; case SUBST_SYS: - l = util_strpcpy(&s, l, udev_get_sys_path(event->udev)); + l = strpcpy(&s, l, "/sys"); break; case SUBST_ENV: if (attr == NULL) { @@ -368,7 +360,7 @@ subst: value = udev_device_get_property_value(event->dev, attr); if (value == NULL) break; - l = util_strpcpy(&s, l, value); + l = strpcpy(&s, l, value); break; } default: @@ -474,9 +466,9 @@ static void spawn_read(struct udev_event *event, int i; if (event->timeout_usec > 0) { - unsigned long long age_usec; + usec_t age_usec; - age_usec = now_usec() - event->birth_usec; + age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; if (age_usec >= event->timeout_usec) { log_error("timeout '%s'\n", cmd); goto out; @@ -486,7 +478,7 @@ static void spawn_read(struct udev_event *event, timeout = -1; } - fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout); + fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout); if (fdcount < 0) { if (errno == EINTR) continue; @@ -562,9 +554,9 @@ static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid) int fdcount; if (event->timeout_usec > 0) { - unsigned long long age_usec; + usec_t age_usec; - age_usec = now_usec() - event->birth_usec; + age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; if (age_usec >= event->timeout_usec) timeout = 1000; else @@ -675,7 +667,7 @@ int udev_event_spawn(struct udev_event *event, char program[UTIL_PATH_SIZE]; int err = 0; - util_strscpy(arg, sizeof(arg), cmd); + strscpy(arg, sizeof(arg), cmd); udev_build_argv(event->udev, arg, NULL, argv); /* pipes from child to parent */ @@ -696,7 +688,7 @@ int udev_event_spawn(struct udev_event *event, /* allow programs in /usr/lib/udev/ to be called without the path */ if (argv[0][0] != '/') { - util_strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL); + strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL); argv[0] = program; } @@ -715,8 +707,8 @@ int udev_event_spawn(struct udev_event *event, log_debug("starting '%s'\n", cmd); - err = spawn_exec(event, cmd, argv, envp, sigmask, - outpipe[WRITE_END], errpipe[WRITE_END]); + spawn_exec(event, cmd, argv, envp, sigmask, + outpipe[WRITE_END], errpipe[WRITE_END]); _exit(2 ); case -1: @@ -753,32 +745,11 @@ out: 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); -} - static int rename_netif(struct udev_event *event) { struct udev_device *dev = event->dev; int sk; struct ifreq ifr; - int loop; int err; log_debug("changing net interface name from '%s' to '%s'\n", @@ -792,52 +763,15 @@ static int rename_netif(struct udev_event *event) } 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)); + strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev)); + strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); 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 }; - - nanosleep(&duration, NULL); - - err = ioctl(sk, SIOCSIFNAME, &ifr); - if (err == 0) { - rename_netif_kernel_log(ifr); - break; - } + if (err >= 0) { + print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname); + } else { err = -errno; - if (err != -EEXIST) - break; - } - -out: - if (err < 0) log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname); + } close(sk); return err; } @@ -863,8 +797,10 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, if (major(udev_device_get_devnum(dev)) != 0) udev_node_remove(dev); } else { - event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev)); + event->dev_db = udev_device_new(event->udev); if (event->dev_db != NULL) { + udev_device_set_syspath(event->dev_db, udev_device_get_syspath(dev)); + udev_device_set_subsystem(event->dev_db, udev_device_get_subsystem(dev)); udev_device_read_db(event->dev_db, NULL); udev_device_set_info_loaded(event->dev_db); @@ -889,11 +825,11 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, 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)); + 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); + 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)); log_debug("changed devpath to '%s'\n", udev_device_get_devpath(dev)); @@ -906,6 +842,12 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, if (event->dev_db != NULL) udev_node_update_old_links(dev, event->dev_db); + if (!event->owner_set) + event->uid = udev_device_get_devnode_uid(dev); + + if (!event->group_set) + event->gid = udev_device_get_devnode_gid(dev); + if (!event->mode_set) { if (udev_device_get_devnode_mode(dev) > 0) { /* kernel supplied value */ @@ -919,14 +861,15 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, } } - udev_node_add(dev, event->mode, event->uid, event->gid); + udev_node_add(dev, event->owner_set || event->group_set || event->mode_set, + 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()); + udev_device_set_usec_initialized(event->dev, now(CLOCK_MONOTONIC)); /* (re)write database file */ udev_device_update_db(dev);