From e4255f115330b949c1caeb561cbe0e39f5225f50 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 3 Sep 2008 23:33:06 +0200 Subject: udevadm: rename source files --- udev/udevadm-info.c | 507 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 507 insertions(+) create mode 100644 udev/udevadm-info.c (limited to 'udev/udevadm-info.c') diff --git a/udev/udevadm-info.c b/udev/udevadm-info.c new file mode 100644 index 0000000000..6501b57d1a --- /dev/null +++ b/udev/udevadm-info.c @@ -0,0 +1,507 @@ +/* + * Copyright (C) 2004-2006 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 version 2 of the License. + * + * 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, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "udev.h" + +static void print_all_attributes(const char *devpath, const char *key) +{ + char path[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + + strlcpy(path, sysfs_path, sizeof(path)); + strlcat(path, devpath, sizeof(path)); + + dir = opendir(path); + if (dir != NULL) { + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + struct stat statbuf; + char filename[PATH_SIZE]; + char *attr_value; + char value[NAME_SIZE]; + size_t len; + + if (dent->d_name[0] == '.') + continue; + + if (strcmp(dent->d_name, "uevent") == 0) + continue; + if (strcmp(dent->d_name, "dev") == 0) + continue; + + strlcpy(filename, path, sizeof(filename)); + strlcat(filename, "/", sizeof(filename)); + strlcat(filename, dent->d_name, sizeof(filename)); + if (lstat(filename, &statbuf) != 0) + continue; + if (S_ISLNK(statbuf.st_mode)) + continue; + + attr_value = sysfs_attr_get_value(devpath, dent->d_name); + if (attr_value == NULL) + continue; + len = strlcpy(value, attr_value, sizeof(value)); + if(len >= sizeof(value)) + len = sizeof(value) - 1; + dbg("attr '%s'='%s'(%zi)\n", dent->d_name, value, len); + + /* remove trailing newlines */ + while (len && value[len-1] == '\n') + value[--len] = '\0'; + + /* skip nonprintable attributes */ + while (len && isprint(value[len-1])) + len--; + if (len) { + dbg("attribute value of '%s' non-printable, skip\n", dent->d_name); + continue; + } + + printf(" %s{%s}==\"%s\"\n", key, dent->d_name, value); + } + } + printf("\n"); +} + +static int print_device_chain(const char *devpath) +{ + struct sysfs_device *dev; + + dev = sysfs_device_get(devpath); + if (dev == NULL) + return -1; + + printf("\n" + "Udevinfo 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", dev->devpath); + printf(" KERNEL==\"%s\"\n", dev->kernel); + printf(" SUBSYSTEM==\"%s\"\n", dev->subsystem); + printf(" DRIVER==\"%s\"\n", dev->driver); + print_all_attributes(dev->devpath, "ATTR"); + + /* walk up the chain of devices */ + while (1) { + dev = sysfs_device_get_parent(dev); + if (dev == NULL) + break; + printf(" looking at parent device '%s':\n", dev->devpath); + printf(" KERNELS==\"%s\"\n", dev->kernel); + printf(" SUBSYSTEMS==\"%s\"\n", dev->subsystem); + printf(" DRIVERS==\"%s\"\n", dev->driver); + + print_all_attributes(dev->devpath, "ATTRS"); + } + + return 0; +} + +static void print_record(struct udevice *udev) +{ + struct name_entry *name_loop; + + printf("P: %s\n", udev->dev->devpath); + printf("N: %s\n", udev->name); + list_for_each_entry(name_loop, &udev->symlink_list, node) + printf("S: %s\n", name_loop->name); + if (udev->link_priority != 0) + printf("L: %i\n", udev->link_priority); + if (udev->partitions != 0) + printf("A:%u\n", udev->partitions); + if (udev->ignore_remove) + printf("R:%u\n", udev->ignore_remove); + list_for_each_entry(name_loop, &udev->env_list, node) + printf("E: %s\n", name_loop->name); +} + +static void export_db(void) { + LIST_HEAD(name_list); + struct name_entry *name_loop; + + udev_db_get_all_entries(&name_list); + list_for_each_entry(name_loop, &name_list, node) { + struct udevice *udev_db; + + udev_db = udev_device_init(); + if (udev_db == NULL) + continue; + if (udev_db_get_device(udev_db, name_loop->name) == 0) + print_record(udev_db); + printf("\n"); + udev_device_cleanup(udev_db); + } + name_list_cleanup(&name_list); +} + +static int lookup_device_by_name(struct udevice **udev, const char *name) +{ + LIST_HEAD(name_list); + int count; + struct name_entry *device; + int rc = -1; + + count = udev_db_get_devices_by_name(name, &name_list); + if (count <= 0) + goto out; + + info("found %i devices for '%s'\n", count, name); + + /* select the device that seems to match */ + list_for_each_entry(device, &name_list, node) { + struct udevice *udev_loop; + char filename[PATH_SIZE]; + struct stat statbuf; + + udev_loop = udev_device_init(); + if (udev_loop == NULL) + break; + if (udev_db_get_device(udev_loop, device->name) != 0) + goto next; + info("found db entry '%s'\n", device->name); + + /* make sure, we don't get a link of a different device */ + strlcpy(filename, udev_root, sizeof(filename)); + strlcat(filename, "/", sizeof(filename)); + strlcat(filename, name, sizeof(filename)); + if (stat(filename, &statbuf) != 0) + goto next; + if (major(udev_loop->devt) > 0 && udev_loop->devt != statbuf.st_rdev) { + info("skip '%s', dev_t doesn't match\n", udev_loop->name); + goto next; + } + rc = 0; + *udev = udev_loop; + break; +next: + udev_device_cleanup(udev_loop); + } +out: + name_list_cleanup(&name_list); + return rc; +} + +static int stat_device(const char *name, int export, const char *prefix) +{ + struct stat statbuf; + + if (stat(name, &statbuf) != 0) + return -1; + + if (export) { + if (prefix == NULL) + prefix = "INFO_"; + printf("%sMAJOR=%d\n" + "%sMINOR=%d\n", + prefix, major(statbuf.st_dev), + prefix, minor(statbuf.st_dev)); + } else + printf("%d:%d\n", major(statbuf.st_dev), minor(statbuf.st_dev)); + return 0; +} + +int udevinfo(int argc, char *argv[]) +{ + int option; + struct udevice *udev = NULL; + int root = 0; + int export = 0; + const char *export_prefix = NULL; + + static const struct option options[] = { + { "name", 1, NULL, 'n' }, + { "path", 1, NULL, 'p' }, + { "query", 1, NULL, 'q' }, + { "attribute-walk", 0, NULL, 'a' }, + { "export-db", 0, NULL, 'e' }, + { "root", 0, NULL, 'r' }, + { "device-id-of-file", 1, NULL, 'd' }, + { "export", 0, NULL, 'x' }, + { "export-prefix", 1, NULL, 'P' }, + { "version", 0, NULL, 1 }, /* -V outputs braindead format */ + { "help", 0, NULL, 'h' }, + {} + }; + + enum action_type { + ACTION_NONE, + ACTION_QUERY, + ACTION_ATTRIBUTE_WALK, + ACTION_ROOT, + ACTION_DEVICE_ID_FILE, + } action = ACTION_NONE; + + enum query_type { + QUERY_NONE, + QUERY_NAME, + QUERY_PATH, + QUERY_SYMLINK, + QUERY_ENV, + QUERY_ALL, + } query = QUERY_NONE; + + char path[PATH_SIZE] = ""; + char name[PATH_SIZE] = ""; + struct name_entry *name_loop; + int rc = 0; + + logging_init("udevinfo"); + udev_config_init(); + sysfs_init(); + + while (1) { + option = getopt_long(argc, argv, "aed:n:p:q:rxPVh", options, NULL); + if (option == -1) + break; + + dbg("option '%c'\n", option); + switch (option) { + case 'n': + /* remove /dev if given */ + if (strncmp(optarg, udev_root, strlen(udev_root)) == 0) + strlcpy(name, &optarg[strlen(udev_root)+1], sizeof(name)); + else + strlcpy(name, optarg, sizeof(name)); + remove_trailing_chars(name, '/'); + dbg("name: %s\n", name); + break; + case 'p': + /* remove /sys if given */ + if (strncmp(optarg, sysfs_path, strlen(sysfs_path)) == 0) + strlcpy(path, &optarg[strlen(sysfs_path)], sizeof(path)); + else + strlcpy(path, optarg, sizeof(path)); + remove_trailing_chars(path, '/'); + + /* possibly resolve to real devpath */ + if (sysfs_resolve_link(path, sizeof(path)) != 0) { + char temp[PATH_SIZE]; + char *pos; + + /* also check if the parent is a link */ + strlcpy(temp, path, sizeof(temp)); + pos = strrchr(temp, '/'); + if (pos != 0) { + char tail[PATH_SIZE]; + + strlcpy(tail, pos, sizeof(tail)); + pos[0] = '\0'; + if (sysfs_resolve_link(temp, sizeof(temp)) == 0) { + strlcpy(path, temp, sizeof(path)); + strlcat(path, tail, sizeof(path)); + } + } + } + dbg("path: %s\n", path); + break; + case 'q': + action = ACTION_QUERY; + if (strcmp(optarg, "name") == 0) { + query = QUERY_NAME; + break; + } + if (strcmp(optarg, "symlink") == 0) { + query = QUERY_SYMLINK; + break; + } + if (strcmp(optarg, "path") == 0) { + query = QUERY_PATH; + break; + } + if (strcmp(optarg, "env") == 0) { + query = QUERY_ENV; + break; + } + if (strcmp(optarg, "all") == 0) { + query = QUERY_ALL; + break; + } + fprintf(stderr, "unknown query type\n"); + rc = 2; + goto exit; + case 'r': + if (action == ACTION_NONE) + action = ACTION_ROOT; + root = 1; + break; + case 'd': + action = ACTION_DEVICE_ID_FILE; + strlcpy(name, optarg, sizeof(name)); + break; + case 'a': + action = ACTION_ATTRIBUTE_WALK; + break; + case 'e': + export_db(); + goto exit; + case 'x': + export = 1; + break; + case 'P': + export_prefix = optarg; + break; + case 1: + printf("%s\n", VERSION); + goto exit; + case 'V': + printf("udevinfo, version %s\n", VERSION); + goto exit; + case 'h': + printf("Usage: udevadm info OPTIONS\n" + " --query= query database for the specified value:\n" + " name name of device node\n" + " symlink pointing to node\n" + " path sysfs device path\n" + " env the device related imported environment\n" + " all all values\n" + " --path= sysfs device path used for query or chain\n" + " --name= node or symlink name used for query\n" + " --root prepend to query result or print udev_root\n" + " --attribute-walk print all key matches while walking along chain\n" + " of parent devices\n" + " --device-id-of-file= print major/minor of underlying device\n" + " --export-db export the content of the udev database\n" + " --help print this text\n" + "\n"); + goto exit; + default: + goto exit; + } + } + + /* run action */ + switch (action) { + case ACTION_QUERY: + /* needs devpath or node/symlink name for query */ + if (path[0] != '\0') { + udev = udev_device_init(); + if (udev == NULL) { + rc = 1; + goto exit; + } + if (udev_db_get_device(udev, path) != 0) { + fprintf(stderr, "no record for '%s' in database\n", path); + rc = 3; + goto exit; + } + } else if (name[0] != '\0') { + if (lookup_device_by_name(&udev, name) != 0) { + fprintf(stderr, "node name not found\n"); + rc = 4; + goto exit; + } + } else { + fprintf(stderr, "query needs --path or node --name specified\n"); + rc = 4; + goto exit; + } + + switch(query) { + case QUERY_NAME: + if (root) + printf("%s/%s\n", udev_root, udev->name); + else + printf("%s\n", udev->name); + break; + case QUERY_SYMLINK: + list_for_each_entry(name_loop, &udev->symlink_list, node) { + char c = name_loop->node.next != &udev->symlink_list ? ' ' : '\n'; + + if (root) + printf("%s/%s%c", udev_root, name_loop->name, c); + else + printf("%s%c", name_loop->name, c); + } + break; + case QUERY_PATH: + printf("%s\n", udev->dev->devpath); + goto exit; + case QUERY_ENV: + list_for_each_entry(name_loop, &udev->env_list, node) + printf("%s\n", name_loop->name); + break; + case QUERY_ALL: + print_record(udev); + break; + default: + fprintf(stderr, "unknown query type\n"); + break; + } + break; + case ACTION_ATTRIBUTE_WALK: + if (path[0] != '\0') { + if (print_device_chain(path) != 0) { + fprintf(stderr, "no valid sysfs device found\n"); + rc = 4; + goto exit; + } + } else if (name[0] != '\0') { + if (lookup_device_by_name(&udev, name) != 0) { + fprintf(stderr, "node name not found\n"); + rc = 4; + goto exit; + } + if (print_device_chain(udev->dev->devpath) != 0) { + fprintf(stderr, "no valid sysfs device found\n"); + rc = 4; + goto exit; + } + } else { + fprintf(stderr, "attribute walk needs --path or node --name specified\n"); + rc = 5; + goto exit; + } + break; + case ACTION_DEVICE_ID_FILE: + if (stat_device(name, export, export_prefix) != 0) + rc = 6; + break; + case ACTION_ROOT: + printf("%s\n", udev_root); + break; + default: + fprintf(stderr, "missing option\n"); + rc = 1; + break; + } + +exit: + udev_device_cleanup(udev); + sysfs_cleanup(); + logging_close(); + return rc; +} -- cgit v1.2.3-54-g00ecf