X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udevinfo.c;h=567193adc7f8949f229d74531b87dca7520a51cf;hp=340496b42b339b707137f65322c51633f23266e4;hb=21dabee8a78bdde10bdb23bd3002c8aa09a161d3;hpb=a0294b76252d8c84656218cafd458e6739361247 diff --git a/udevinfo.c b/udevinfo.c index 340496b42..567193adc 100644 --- a/udevinfo.c +++ b/udevinfo.c @@ -1,8 +1,7 @@ /* - * udevinfo - fetches attributes for a device - * - * Copyright (C) 2004 Kay Sievers + * udevinfo.c - fetches stored device information or sysfs attributes * + * Copyright (C) 2004-2005 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 @@ -22,238 +21,208 @@ #include #include #include +#include #include #include #include +#include #include -#include "libsysfs/sysfs/libsysfs.h" -#include "libsysfs/dlist.h" #include "udev.h" -#include "udev_utils.h" -#include "udev_version.h" -#include "udev_db.h" -#include "logging.h" - -#define SYSFS_VALUE_SIZE 256 -#ifdef LOG -unsigned char logname[LOGNAME_SIZE]; -void log_message (int level, const char *format, ...) +#ifdef USE_LOG +void log_message (int priority, const char *format, ...) { va_list args; + if (priority > udev_log_priority) + return; + va_start(args, format); - vsyslog(level, format, args); + vsyslog(priority, format, args); va_end(args); } #endif -static int print_all_attributes(const char *path) +static void print_all_attributes(const char *devpath) { - struct dlist *attributes; - struct sysfs_attribute *attr; - struct sysfs_directory *sysfs_dir; - char value[SYSFS_VALUE_SIZE]; - int len; - int retval = 0; - - sysfs_dir = sysfs_open_directory(path); - if (sysfs_dir == NULL) - return -1; - - attributes = sysfs_get_dir_attributes(sysfs_dir); - if (attributes == NULL) { - retval = -1; - goto exit; - } - - dlist_for_each_data(attributes, attr, struct sysfs_attribute) { - if (attr->value != NULL) { - strfieldcpy(value, attr->value); - len = strlen(value); - if (len == 0) + 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)) { + char *attr_value; + char value[NAME_SIZE]; + size_t len; + + attr_value = sysfs_attr_get_value(devpath, dent->d_name); + if (attr_value == NULL) continue; + len = strlcpy(value, attr_value, sizeof(value)); + dbg("attr '%s'='%s'(%zi)", dent->d_name, value, len); - /* remove trailing newline */ - if (value[len-1] == '\n') { - value[len-1] = '\0'; - len--; - } + /* remove trailing newlines */ + while (len && value[len-1] == '\n') + value[--len] = '\0'; - /* skip nonprintable values */ - while (len) { - if (isprint(value[len-1]) == 0) - break; + /* skip nonprintable attributes */ + while (len && isprint(value[len-1])) len--; + if (len) { + dbg("attribute value of '%s' non-printable, skip", dent->d_name); + continue; } - if (len == 0) - printf(" SYSFS{%s}=\"%s\"\n", attr->name, value); + + replace_untrusted_chars(value); + printf(" SYSFS{%s}==\"%s\"\n", dent->d_name, value); } } printf("\n"); - -exit: - sysfs_close_directory(sysfs_dir); - - return retval; } -static int print_record(struct udevice *udev) +static int print_device_chain(const char *devpath) { - printf("P: %s\n", udev->devpath); - printf("N: %s\n", udev->name); - printf("S: %s\n", udev->symlink); - printf("\n"); - return 0; -} - -enum query_type { - NONE, - NAME, - PATH, - SYMLINK, - ALL -}; - -static int print_device_chain(const char *path) -{ - struct sysfs_class_device *class_dev; - struct sysfs_class_device *class_dev_parent; - struct sysfs_attribute *attr; - struct sysfs_device *sysfs_dev; - struct sysfs_device *sysfs_dev_parent; - int retval = 0; - - /* get the class dev */ - class_dev = sysfs_open_class_device_path(path); - if (class_dev == NULL) { - printf("couldn't get the class device\n"); - return -1; - } - - printf("\nudevinfo starts with the device the node belongs to and then walks up the\n" - "device chain, to print for every device found, all possibly useful attributes\n" - "in the udev key format.\n" - "Only attributes within one device section may be used together in one rule,\n" - "to match the device for which the node will be created.\n" + struct sysfs_device *dev; + + 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"); - /* look for the 'dev' file */ - attr = sysfs_get_classdev_attr(class_dev, "dev"); - if (attr != NULL) - printf("device '%s' has major:minor %s", class_dev->path, attr->value); + dev = sysfs_device_get(devpath); + if (dev == NULL) + return -1; - /* open sysfs class device directory and print all attributes */ - printf(" looking at class device '%s':\n", class_dev->path); - if (print_all_attributes(class_dev->path) != 0) { - printf("couldn't open class device directory\n"); - retval = -1; - goto exit; - } + printf(" looking at device '%s':\n", dev->devpath); + printf(" KERNEL==\"%s\"\n", dev->kernel_name); + printf(" SUBSYSTEM==\"%s\"\n", dev->subsystem); + print_all_attributes(dev->devpath); - /* get the device link (if parent exists look here) */ - class_dev_parent = sysfs_get_classdev_parent(class_dev); - if (class_dev_parent != NULL) - sysfs_dev = sysfs_get_classdev_device(class_dev_parent); - else - sysfs_dev = sysfs_get_classdev_device(class_dev); - - if (sysfs_dev != NULL) - printf("follow the class device's \"device\"\n"); - - /* look the device chain upwards */ - while (sysfs_dev != NULL) { - printf(" looking at the device chain at '%s':\n", sysfs_dev->path); - printf(" BUS=\"%s\"\n", sysfs_dev->bus); - printf(" ID=\"%s\"\n", sysfs_dev->bus_id); - - /* open sysfs device directory and print all attributes */ - print_all_attributes(sysfs_dev->path); - - sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev); - if (sysfs_dev_parent == NULL) + /* 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(" ID==\"%s\"\n", dev->kernel_name); + printf(" BUS==\"%s\"\n", dev->subsystem); + printf(" DRIVER==\"%s\"\n", dev->driver); - sysfs_dev = sysfs_dev_parent; + print_all_attributes(dev->devpath); } -exit: - sysfs_close_class_device(class_dev); - return retval; + return 0; } -/* print all class/main block devices with major/minor, physical device, driver and bus */ -static int print_sysfs_devices(void) +static void print_record(struct udevice *udev) { - struct dlist *subsyslist; - char *class; - - subsyslist = sysfs_open_subsystem_list("class"); - if (!subsyslist) - return -1; + struct name_entry *name_loop; - dlist_for_each_data(subsyslist, class, char) { - struct sysfs_class *cls; - struct dlist *class_devices; - struct sysfs_class_device *class_dev; - struct sysfs_device *phys_dev; - unsigned int major, minor; - - cls = sysfs_open_class(class); - if (!cls) - continue; + 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); + list_for_each_entry(name_loop, &udev->env_list, node) + printf("E: %s\n", name_loop->name); +} - class_devices = sysfs_get_class_devices(cls); - if (!class_devices) - continue; +static void export_name_devpath(struct udevice *udev) { + printf("%s=%s/%s\n", udev->dev->devpath, udev_root, udev->name); +} - dlist_for_each_data(class_devices, class_dev, struct sysfs_class_device) { - struct sysfs_attribute *attr; +static void export_record(struct udevice *udev) { + print_record(udev); + printf("\n"); +} - printf("\n"); - printf("DEVPATH '%s'\n", class_dev->path); - printf("SUBSYSTEM '%s'\n", class_dev->classname); - - attr = sysfs_get_classdev_attr(class_dev, "dev"); - if (attr) { - sscanf(attr->value, "%u:%u", &major, &minor); - printf("MAJOR %u\n", minor); - printf("MINOR %u\n", major); - } +static void export_db(void fnct(struct udevice *udev)) { + LIST_HEAD(name_list); + struct name_entry *name_loop; - phys_dev = sysfs_get_classdev_device(class_dev); - if (phys_dev) { - printf("PHYSDEVPATH '%s'\n", phys_dev->path); - if (phys_dev->bus[0] != '\0') - printf("PHYSDEVBUS '%s'\n", phys_dev->bus); + udev_db_get_all_entries(&name_list); + list_for_each_entry(name_loop, &name_list, node) { + struct udevice *udev_db; - if (phys_dev->driver_name[0] != '\0') - printf("PHYSDEVDRIVER '%s'\n", phys_dev->driver_name); - } - } - sysfs_close_class(cls); + udev_db = udev_device_init(); + if (udev_db == NULL) + continue; + if (udev_db_get_device(udev_db, name_loop->name) == 0) + fnct(udev_db); + udev_device_cleanup(udev_db); } - sysfs_close_list(subsyslist); + name_list_cleanup(&name_list); +} - return 0; +static void print_help(void) +{ + fprintf(stderr, "Usage: udevinfo [-anpqrVh]\n" + " -q TYPE 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" + "\n" + " -p PATH sysfs device path used for query or chain\n" + " -n NAME node/symlink name used for query\n" + "\n" + " -r prepend to query result or print udev_root\n" + " -a print all SYSFS_attributes along the device chain\n" + " -e export the content of the udev database\n" + " -V print udev version\n" + " -h print this help text\n" + "\n"); } -static int process_options(int argc, char *argv[]) +int main(int argc, char *argv[], char *envp[]) { - static const char short_options[] = "adn:p:q:rsVh"; + static const char short_options[] = "aden:p:q:rVh"; int option; - int retval = 1; - struct udevice udev; + struct udevice *udev; int root = 0; - int attributes = 0; - enum query_type query = NONE; - char result[1024] = ""; - char path[NAME_SIZE] = ""; - char name[NAME_SIZE] = ""; - char temp[NAME_SIZE]; + + enum action_type { + ACTION_NONE, + ACTION_QUERY, + ACTION_ATTRIBUTE_WALK, + ACTION_ROOT, + } 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] = ""; + char temp[PATH_SIZE]; + struct name_entry *name_loop; char *pos; + int rc = 0; + + logging_init("udevinfo"); + + udev_config_init(); + sysfs_init(); + + udev = udev_device_init(); + if (udev == NULL) { + rc = 1; + goto exit; + } /* get command line options */ while (1) { @@ -265,66 +234,71 @@ static int process_options(int argc, char *argv[]) switch (option) { case 'n': dbg("udev name: %s\n", optarg); - strfieldcpy(name, optarg); + strlcpy(name, optarg, sizeof(name)); break; - case 'p': dbg("udev path: %s\n", optarg); - strfieldcpy(path, optarg); + /* remove sysfs mountpoint if not given */ + if (strncmp(optarg, sysfs_path, strlen(sysfs_path)) == 0) + strlcpy(path, &optarg[strlen(sysfs_path)], sizeof(path)); + else + strlcpy(path, optarg, sizeof(path)); break; - case 'q': dbg("udev query: %s\n", optarg); - + action = ACTION_QUERY; if (strcmp(optarg, "name") == 0) { - query = NAME; + query = QUERY_NAME; break; } - if (strcmp(optarg, "symlink") == 0) { - query = SYMLINK; + query = QUERY_SYMLINK; break; } - if (strcmp(optarg, "path") == 0) { - query = PATH; + query = QUERY_PATH; + break; + } + if (strcmp(optarg, "env") == 0) { + query = QUERY_ENV; break; } - if (strcmp(optarg, "all") == 0) { - query = ALL; + query = QUERY_ALL; break; } - - printf("unknown query type\n"); - exit(1); - + fprintf(stderr, "unknown query type\n"); + rc = 2; + goto exit; case 'r': + if (action == ACTION_NONE) + action = ACTION_ROOT; root = 1; break; - - case 's': - print_sysfs_devices(); - exit(0); - case 'a': - attributes = 1; + action = ACTION_ATTRIBUTE_WALK; break; - + case 'd': + export_db(export_name_devpath); + goto exit; + case 'e': + export_db(export_record); + goto exit; case 'V': printf("udevinfo, version %s\n", UDEV_VERSION); - exit(0); - + goto exit; case 'h': - retval = 0; case '?': default: - goto help; + print_help(); + goto exit; } } - /* process options */ - if (query != NONE) { + /* run action */ + switch (action) { + case ACTION_QUERY: + /* need devpath or node/symlink name for query */ if (path[0] != '\0') { /* remove sysfs_path if given */ if (strncmp(path, sysfs_path, strlen(sysfs_path)) == 0) { @@ -332,143 +306,94 @@ static int process_options(int argc, char *argv[]) } else { if (path[0] != '/') { /* prepend '/' if missing */ - strfieldcat(temp, "/"); - strfieldcat(temp, path); + strcpy(temp, "/"); + strlcpy(temp, path, sizeof(temp)); pos = temp; } else { pos = path; } } - memset(&udev, 0x00, sizeof(struct udevice)); - strfieldcpy(udev.devpath, pos); - retval = udev_db_get_device(&udev); - if (retval != 0) { - printf("device not found in database\n"); + if (udev_db_get_device(udev, pos) != 0) { + fprintf(stderr, "no record for '%s' in database\n", pos); + rc = 3; goto exit; } - goto print; - } + } else if (name[0] != '\0') { + char devpath[PATH_SIZE]; + int len; - if (name[0] != '\0') { /* remove udev_root if given */ - int len = strlen(udev_root); - + len = strlen(udev_root); if (strncmp(name, udev_root, len) == 0) { pos = &name[len+1]; } else pos = name; - memset(&udev, 0x00, sizeof(struct udevice)); - strfieldcpy(udev.name, pos); - retval = udev_db_get_device_byname(&udev, pos); - if (retval != 0) { - printf("device not found in database\n"); + if (udev_db_lookup_name(pos, devpath, sizeof(devpath)) != 0) { + fprintf(stderr, "no record for '%s' in database\n", pos); + rc = 3; goto exit; } - - goto print; + udev_db_get_device(udev, devpath); + } else { + fprintf(stderr, "query needs device path(-p) or node name(-n) specified\n"); + rc = 4; + goto exit; } - printf("query needs device path(-p) or node name(-n) specified\n"); - goto exit; - -print: switch(query) { - case NAME: - if (root) { - snprintf(result, NAME_SIZE-1, "%s/%s", udev_root, udev.name); - result[NAME_SIZE-1] = '\0'; - } else { - strfieldcpy(result, udev.name); - } - break; - - case SYMLINK: - if (root) { - int slen; - char *spos; - char slink[NAME_SIZE]; - - pos = result; - foreach_strpart(udev.symlink, " \n\r", spos, slen) { - strncpy(slink, spos, slen); - slink[slen] = '\0'; - pos += sprintf(pos, "%s/%s ", udev_root, slink); - } - } else { - strfieldcpy(result, udev.symlink); - } + case QUERY_NAME: + if (root) + printf("%s/%s\n", udev_root, udev->name); + else + printf("%s\n", udev->name); break; - - case PATH: - strfieldcpy(result, path); + case QUERY_SYMLINK: + if (list_empty(&udev->symlink_list)) + goto exit; + if (root) + list_for_each_entry(name_loop, &udev->symlink_list, node) + printf("%s/%s ", udev_root, name_loop->name); + else + list_for_each_entry(name_loop, &udev->symlink_list, node) + printf("%s ", name_loop->name); + printf("\n"); break; - - case ALL: - print_record(&udev); + 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: - goto exit; + print_help(); + break; } - printf("%s\n", result); - -exit: - return retval; - } - - if (attributes) { + break; + case ACTION_ATTRIBUTE_WALK: if (path[0] == '\0') { - printf("attribute walk on device chain needs path(-p) specified\n"); - return -EINVAL; - } else { - if (strncmp(path, sysfs_path, strlen(sysfs_path)) != 0) { - /* prepend sysfs mountpoint if not given */ - strfieldcpy(temp, path); - strfieldcpy(path, sysfs_path); - strfieldcat(path, temp); - } + fprintf(stderr, "attribute walk on device chain needs path(-p) specified\n"); + rc = 4; + goto exit; + } else print_device_chain(path); - return 0; - } - } - - if (root) { + break; + case ACTION_ROOT: printf("%s\n", udev_root); - return 0; + break; + default: + print_help(); + rc = 1; + break; } -help: - printf("Usage: udevinfo [-anpqrdVh]\n" - " -q TYPE query database for the specified value:\n" - " 'name' name of device node\n" - " 'symlink' pointing to node\n" - " 'path' sysfs device path\n" - " 'all' all values\n" - "\n" - " -p PATH sysfs device path used for query or chain\n" - " -n NAME node/symlink name used for query\n" - "\n" - " -r print udev root\n" - " -a print all SYSFS_attributes along the device chain\n" - " -s print all sysfs devices with major/minor, physical device and bus\n" - " -V print udev version\n" - " -h print this help text\n" - "\n"); - return retval; -} - -int main(int argc, char *argv[], char *envp[]) -{ - int rc = 0; - - logging_init("udevinfo"); - - /* initialize our configuration */ - udev_init_config(); - - rc = process_options(argc, argv); - +exit: + udev_device_cleanup(udev); + sysfs_cleanup(); logging_close(); - exit(rc); + return rc; }