From 7bd29679e6dd590bddfa18401749fad5c8f5d46b Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Wed, 10 May 2017 17:38:59 -0400 Subject: ./tools/notsd-move --- src/grp-udev/udevadm/udevadm-info.c | 481 ++++++++++++++++++++++++++++++++++++ 1 file changed, 481 insertions(+) create mode 100644 src/grp-udev/udevadm/udevadm-info.c (limited to 'src/grp-udev/udevadm/udevadm-info.c') diff --git a/src/grp-udev/udevadm/udevadm-info.c b/src/grp-udev/udevadm/udevadm-info.c new file mode 100644 index 0000000000..38233de223 --- /dev/null +++ b/src/grp-udev/udevadm/udevadm-info.c @@ -0,0 +1,481 @@ +/* + * Copyright (C) 2004-2009 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 + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "systemd-basic/fd-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-shared/udev-util.h" +#include "udev.h" + +#include "udevadm-util.h" + +static bool skip_attribute(const char *name) { + static const char* const skip[] = { + "uevent", + "dev", + "modalias", + "resource", + "driver", + "subsystem", + "module", + }; + unsigned int i; + + for (i = 0; i < ELEMENTSOF(skip); i++) + if (streq(name, skip[i])) + return true; + return false; +} + +static void print_all_attributes(struct udev_device *device, const char *key) { + struct udev_list_entry *sysattr; + + udev_list_entry_foreach(sysattr, udev_device_get_sysattr_list_entry(device)) { + const char *name; + const char *value; + size_t len; + + name = udev_list_entry_get_name(sysattr); + if (skip_attribute(name)) + continue; + + value = udev_device_get_sysattr_value(device, name); + if (value == NULL) + continue; + + /* skip any values that look like a path */ + if (value[0] == '/') + continue; + + /* skip nonprintable attributes */ + len = strlen(value); + while (len > 0 && isprint(value[len-1])) + len--; + if (len > 0) + continue; + + printf(" %s{%s}==\"%s\"\n", key, name, value); + } + printf("\n"); +} + +static int print_device_chain(struct udev_device *device) { + struct udev_device *device_parent; + const char *str; + + printf("\n" + "Udevadm info starts with the device specified by the devpath and then\n" + "walks up the chain of parent devices. It prints for every device\n" + "found, all possible attributes in the udev rules key format.\n" + "A rule to match, can be composed by the attributes of the device\n" + "and the attributes from one single parent device.\n" + "\n"); + + printf(" looking at device '%s':\n", udev_device_get_devpath(device)); + printf(" KERNEL==\"%s\"\n", udev_device_get_sysname(device)); + str = udev_device_get_subsystem(device); + if (str == NULL) + str = ""; + printf(" SUBSYSTEM==\"%s\"\n", str); + str = udev_device_get_driver(device); + if (str == NULL) + str = ""; + printf(" DRIVER==\"%s\"\n", str); + print_all_attributes(device, "ATTR"); + + device_parent = device; + do { + device_parent = udev_device_get_parent(device_parent); + if (device_parent == NULL) + break; + printf(" looking at parent device '%s':\n", udev_device_get_devpath(device_parent)); + printf(" KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent)); + str = udev_device_get_subsystem(device_parent); + if (str == NULL) + str = ""; + printf(" SUBSYSTEMS==\"%s\"\n", str); + str = udev_device_get_driver(device_parent); + if (str == NULL) + str = ""; + printf(" DRIVERS==\"%s\"\n", str); + print_all_attributes(device_parent, "ATTRS"); + } while (device_parent != NULL); + + return 0; +} + +static void print_record(struct udev_device *device) { + const char *str; + int i; + struct udev_list_entry *list_entry; + + printf("P: %s\n", udev_device_get_devpath(device)); + + str = udev_device_get_devnode(device); + if (str != NULL) + printf("N: %s\n", str + strlen("/dev/")); + + i = udev_device_get_devlink_priority(device); + if (i != 0) + printf("L: %i\n", i); + + udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) + printf("S: %s\n", udev_list_entry_get_name(list_entry) + strlen("/dev/")); + + udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) + printf("E: %s=%s\n", + udev_list_entry_get_name(list_entry), + udev_list_entry_get_value(list_entry)); + printf("\n"); +} + +static int stat_device(const char *name, bool export, const char *prefix) { + struct stat statbuf; + + if (stat(name, &statbuf) != 0) + return -errno; + + if (export) { + if (prefix == NULL) + prefix = "INFO_"; + printf("%sMAJOR=%u\n" + "%sMINOR=%u\n", + prefix, major(statbuf.st_dev), + prefix, minor(statbuf.st_dev)); + } else + printf("%u:%u\n", major(statbuf.st_dev), minor(statbuf.st_dev)); + return 0; +} + +static int export_devices(struct udev *udev) { + _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate; + struct udev_list_entry *list_entry; + + udev_enumerate = udev_enumerate_new(udev); + if (udev_enumerate == NULL) + return -ENOMEM; + + udev_enumerate_scan_devices(udev_enumerate); + udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { + _cleanup_udev_device_unref_ struct udev_device *device; + + device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); + if (device != NULL) + print_record(device); + } + + return 0; +} + +static void cleanup_dir(DIR *dir, mode_t mask, int depth) { + struct dirent *dent; + + if (depth <= 0) + return; + + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + struct stat stats; + + if (dent->d_name[0] == '.') + continue; + if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0) + continue; + if ((stats.st_mode & mask) != 0) + continue; + if (S_ISDIR(stats.st_mode)) { + _cleanup_closedir_ DIR *dir2; + + dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); + if (dir2 != NULL) + cleanup_dir(dir2, mask, depth-1); + + (void) unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR); + } else + (void) unlinkat(dirfd(dir), dent->d_name, 0); + } +} + +static void cleanup_db(struct udev *udev) { + _cleanup_closedir_ DIR *dir1 = NULL, *dir2 = NULL, *dir3 = NULL, *dir4 = NULL, *dir5 = NULL; + + (void) unlink("/run/udev/queue.bin"); + + dir1 = opendir("/run/udev/data"); + if (dir1 != NULL) + cleanup_dir(dir1, S_ISVTX, 1); + + dir2 = opendir("/run/udev/links"); + if (dir2 != NULL) + cleanup_dir(dir2, 0, 2); + + dir3 = opendir("/run/udev/tags"); + if (dir3 != NULL) + cleanup_dir(dir3, 0, 2); + + dir4 = opendir("/run/udev/static_node-tags"); + if (dir4 != NULL) + cleanup_dir(dir4, 0, 2); + + dir5 = opendir("/run/udev/watch"); + if (dir5 != NULL) + cleanup_dir(dir5, 0, 1); +} + +static void help(void) { + + printf("%s info [OPTIONS] [DEVPATH|FILE]\n\n" + "Query sysfs or the udev database.\n\n" + " -h --help Print this message\n" + " --version Print version of the program\n" + " -q --query=TYPE Query device information:\n" + " name Name of device node\n" + " symlink Pointing to node\n" + " path sysfs device path\n" + " property The device properties\n" + " all All values\n" + " -p --path=SYSPATH sysfs device path used for query or attribute walk\n" + " -n --name=NAME Node or symlink name used for query or attribute walk\n" + " -r --root Prepend dev directory to path names\n" + " -a --attribute-walk Print all key matches walking along the chain\n" + " of parent devices\n" + " -d --device-id-of-file=FILE Print major:minor of device containing this file\n" + " -x --export Export key/value pairs\n" + " -P --export-prefix Export the key name with a prefix\n" + " -e --export-db Export the content of the udev database\n" + " -c --cleanup-db Clean up the udev database\n" + , program_invocation_short_name); +} + +static int uinfo(struct udev *udev, int argc, char *argv[]) { + _cleanup_udev_device_unref_ struct udev_device *device = NULL; + bool root = 0; + bool export = 0; + const char *export_prefix = NULL; + char name[UTIL_PATH_SIZE]; + struct udev_list_entry *list_entry; + int c; + + static const struct option options[] = { + { "name", required_argument, NULL, 'n' }, + { "path", required_argument, NULL, 'p' }, + { "query", required_argument, NULL, 'q' }, + { "attribute-walk", no_argument, NULL, 'a' }, + { "cleanup-db", no_argument, NULL, 'c' }, + { "export-db", no_argument, NULL, 'e' }, + { "root", no_argument, NULL, 'r' }, + { "device-id-of-file", required_argument, NULL, 'd' }, + { "export", no_argument, NULL, 'x' }, + { "export-prefix", required_argument, NULL, 'P' }, + { "version", no_argument, NULL, 'V' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + + enum action_type { + ACTION_QUERY, + ACTION_ATTRIBUTE_WALK, + ACTION_DEVICE_ID_FILE, + } action = ACTION_QUERY; + + enum query_type { + QUERY_NAME, + QUERY_PATH, + QUERY_SYMLINK, + QUERY_PROPERTY, + QUERY_ALL, + } query = QUERY_ALL; + + while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL)) >= 0) + switch (c) { + case 'n': { + if (device != NULL) { + fprintf(stderr, "device already specified\n"); + return 2; + } + + device = find_device(udev, optarg, "/dev/"); + if (device == NULL) { + fprintf(stderr, "device node not found\n"); + return 2; + } + break; + } + case 'p': + if (device != NULL) { + fprintf(stderr, "device already specified\n"); + return 2; + } + + device = find_device(udev, optarg, "/sys"); + if (device == NULL) { + fprintf(stderr, "syspath not found\n"); + return 2; + } + break; + case 'q': + action = ACTION_QUERY; + if (streq(optarg, "property") || streq(optarg, "env")) + query = QUERY_PROPERTY; + else if (streq(optarg, "name")) + query = QUERY_NAME; + else if (streq(optarg, "symlink")) + query = QUERY_SYMLINK; + else if (streq(optarg, "path")) + query = QUERY_PATH; + else if (streq(optarg, "all")) + query = QUERY_ALL; + else { + fprintf(stderr, "unknown query type\n"); + return 3; + } + break; + case 'r': + root = true; + break; + case 'd': + action = ACTION_DEVICE_ID_FILE; + strscpy(name, sizeof(name), optarg); + break; + case 'a': + action = ACTION_ATTRIBUTE_WALK; + break; + case 'e': + if (export_devices(udev) < 0) + return 1; + return 0; + case 'c': + cleanup_db(udev); + return 0; + case 'x': + export = true; + break; + case 'P': + export_prefix = optarg; + break; + case 'V': + printf("%s\n", VERSION); + return 0; + case 'h': + help(); + return 0; + default: + return 1; + } + + switch (action) { + case ACTION_QUERY: + if (!device) { + if (!argv[optind]) { + help(); + return 2; + } + device = find_device(udev, argv[optind], NULL); + if (!device) { + fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n"); + return 4; + } + } + + switch(query) { + case QUERY_NAME: { + const char *node = udev_device_get_devnode(device); + + if (node == NULL) { + fprintf(stderr, "no device node found\n"); + return 5; + } + + if (root) + printf("%s\n", udev_device_get_devnode(device)); + else + printf("%s\n", udev_device_get_devnode(device) + strlen("/dev/")); + break; + } + case QUERY_SYMLINK: + list_entry = udev_device_get_devlinks_list_entry(device); + while (list_entry != NULL) { + if (root) + printf("%s", udev_list_entry_get_name(list_entry)); + else + printf("%s", udev_list_entry_get_name(list_entry) + strlen("/dev/")); + list_entry = udev_list_entry_get_next(list_entry); + if (list_entry != NULL) + printf(" "); + } + printf("\n"); + break; + case QUERY_PATH: + printf("%s\n", udev_device_get_devpath(device)); + return 0; + case QUERY_PROPERTY: + list_entry = udev_device_get_properties_list_entry(device); + while (list_entry != NULL) { + if (export) + printf("%s%s='%s'\n", strempty(export_prefix), + udev_list_entry_get_name(list_entry), + udev_list_entry_get_value(list_entry)); + else + printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry)); + + list_entry = udev_list_entry_get_next(list_entry); + } + break; + case QUERY_ALL: + print_record(device); + break; + default: + assert_not_reached("unknown query type"); + } + break; + case ACTION_ATTRIBUTE_WALK: + if (!device && argv[optind]) { + device = find_device(udev, argv[optind], NULL); + if (!device) { + fprintf(stderr, "Unknown device, absolute path in /dev/ or /sys expected.\n"); + return 4; + } + } + if (!device) { + fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n"); + return 4; + } + print_device_chain(device); + break; + case ACTION_DEVICE_ID_FILE: + if (stat_device(name, export, export_prefix) != 0) + return 1; + break; + } + + return 0; +} + +const struct udevadm_cmd udevadm_info = { + .name = "info", + .cmd = uinfo, + .help = "Query sysfs or the udev database", +}; -- cgit v1.2.3-54-g00ecf