Fork of Original Code Base: anongit.freedesktop.org/systemd

This is the initial fork of the code base from freedsktop.org.
The code is provided here as a reference of the initial starting
point and for possible future checkouts after a large portion
of this code is removed.

Merge git://anongit.freedesktop.org/systemd/systemd

1 files changed, 550 insertions, 0 deletions

diff --git a/src/udev/udevadm-info.c b/src/udev/udevadm-info.c
new file mode 100644
index 0000000000..95f077ca95
--- /dev/null
+++ b/src/udev/udevadm-info.c
@@ -0,0 +1,550 @@
+/*
+ * Copyright (C) 2004-2009 Kay Sievers <kay@vrfy.org>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <errno.h>
+#include <getopt.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "udev.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 (strcmp(name, skip[i]) == 0)
+                        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 -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;
+}
+
+static int export_devices(struct udev *udev)
+{
+        struct udev_enumerate *udev_enumerate;
+        struct udev_list_entry *list_entry;
+
+        udev_enumerate = udev_enumerate_new(udev);
+        if (udev_enumerate == NULL)
+                return -1;
+        udev_enumerate_scan_devices(udev_enumerate);
+        udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+                struct udev_device *device;
+
+                device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
+                if (device != NULL) {
+                        print_record(device);
+                        udev_device_unref(device);
+                }
+        }
+        udev_enumerate_unref(udev_enumerate);
+        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)) {
+                        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);
+                                closedir(dir2);
+                        }
+                        unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
+                } else {
+                        unlinkat(dirfd(dir), dent->d_name, 0);
+                }
+        }
+}
+
+static void cleanup_db(struct udev *udev)
+{
+        DIR *dir;
+
+        unlink("/run/udev/queue.bin");
+
+        dir = opendir("/run/udev/data");
+        if (dir != NULL) {
+                cleanup_dir(dir, S_ISVTX, 1);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/links");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 2);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/tags");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 2);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/watch");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 1);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/firmware-missing");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 1);
+                closedir(dir);
+        }
+}
+
+static struct udev_device *find_device(struct udev *udev, const char *id, const char *prefix)
+{
+        char name[UTIL_PATH_SIZE];
+
+        if (prefix && !startswith(id, prefix)) {
+                util_strscpyl(name, sizeof(name), prefix, id, NULL);
+                id = name;
+        }
+
+        if (startswith(id, "/dev/")) {
+                struct stat statbuf;
+                char type;
+
+                if (stat(id, &statbuf) < 0)
+                        return NULL;
+
+                if (S_ISBLK(statbuf.st_mode))
+                        type = 'b';
+                else if (S_ISCHR(statbuf.st_mode))
+                        type = 'c';
+                else
+                        return NULL;
+
+                return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
+        } else if (startswith(id, "/sys/"))
+                return udev_device_new_from_syspath(udev, id);
+        else
+                return NULL;
+}
+
+static int uinfo(struct udev *udev, int argc, char *argv[])
+{
+        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 rc = 0;
+
+        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' },
+                {}
+        };
+
+        static const char *usage =
+                "Usage: udevadm info OPTIONS\n"
+                "  --query=<type>             query device information:\n"
+                "      name                     name of device node\n"
+                "      symlink                  pointing to node\n"
+                "      path                     sys device path\n"
+                "      property                 the device properties\n"
+                "      all                      all values\n"
+                "  --path=<syspath>           sys device path used for query or attribute walk\n"
+                "  --name=<name>              node or symlink name used for query or attribute walk\n"
+                "  --root                     prepend dev directory to path names\n"
+                "  --attribute-walk           print all key matches while walking along the chain\n"
+                "                             of parent devices\n"
+                "  --device-id-of-file=<file> print major:minor of device containing this file\n"
+                "  --export                   export key/value pairs\n"
+                "  --export-prefix            export the key name with a prefix\n"
+                "  --export-db                export the content of the udev database\n"
+                "  --cleanup-db               cleanup the udev database\n"
+                "  --help\n";
+
+        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;
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'n': {
+                        if (device != NULL) {
+                                fprintf(stderr, "device already specified\n");
+                                rc = 2;
+                                goto exit;
+                        }
+
+                        device = find_device(udev, optarg, "/dev/");
+                        if (device == NULL) {
+                                fprintf(stderr, "device node not found\n");
+                                rc = 2;
+                                goto exit;
+                        }
+                        break;
+                }
+                case 'p':
+                        if (device != NULL) {
+                                fprintf(stderr, "device already specified\n");
+                                rc = 2;
+                                goto exit;
+                        }
+
+                        device = find_device(udev, optarg, "/sys");
+                        if (device == NULL) {
+                                fprintf(stderr, "syspath not found\n");
+                                rc = 2;
+                                goto exit;
+                        }
+                        break;
+                case 'q':
+                        action = ACTION_QUERY;
+                        if (strcmp(optarg, "property") == 0 || strcmp(optarg, "env") == 0) {
+                                query = QUERY_PROPERTY;
+                        } else if (strcmp(optarg, "name") == 0) {
+                                query = QUERY_NAME;
+                        } else if (strcmp(optarg, "symlink") == 0) {
+                                query = QUERY_SYMLINK;
+                        } else if (strcmp(optarg, "path") == 0) {
+                                query = QUERY_PATH;
+                        } else if (strcmp(optarg, "all") == 0) {
+                                query = QUERY_ALL;
+                        } else {
+                                fprintf(stderr, "unknown query type\n");
+                                rc = 3;
+                                goto exit;
+                        }
+                        break;
+                case 'r':
+                        root = true;
+                        break;
+                case 'd':
+                        action = ACTION_DEVICE_ID_FILE;
+                        util_strscpy(name, sizeof(name), optarg);
+                        break;
+                case 'a':
+                        action = ACTION_ATTRIBUTE_WALK;
+                        break;
+                case 'e':
+                        export_devices(udev);
+                        goto exit;
+                case 'c':
+                        cleanup_db(udev);
+                        goto exit;
+                case 'x':
+                        export = true;
+                        break;
+                case 'P':
+                        export_prefix = optarg;
+                        break;
+                case 'V':
+                        printf("%s\n", VERSION);
+                        goto exit;
+                case 'h':
+                        printf("%s\n", usage);
+                        goto exit;
+                default:
+                        rc = 1;
+                        goto exit;
+                }
+        }
+
+        switch (action) {
+        case ACTION_QUERY:
+                if (!device) {
+                        if (!argv[optind]) {
+                                fprintf(stderr, "%s\n", usage);
+                                rc = 2;
+                                goto exit;
+                        }
+                        device = find_device(udev, argv[optind], NULL);
+                        if (!device) {
+                                fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
+                                rc = 4;
+                                goto exit;
+                        }
+                }
+
+                switch(query) {
+                case QUERY_NAME: {
+                        const char *node = udev_device_get_devnode(device);
+
+                        if (node == NULL) {
+                                fprintf(stderr, "no device node found\n");
+                                rc = 5;
+                                goto exit;
+                        }
+
+                        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));
+                        goto exit;
+                case QUERY_PROPERTY:
+                        list_entry = udev_device_get_properties_list_entry(device);
+                        while (list_entry != NULL) {
+                                if (export) {
+                                        const char *prefix = export_prefix;
+
+                                        if (prefix == NULL)
+                                                prefix = "";
+                                        printf("%s%s='%s'\n", 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:
+                        fprintf(stderr, "unknown query type\n");
+                        break;
+                }
+                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");
+                                rc = 4;
+                                goto exit;
+                        }
+                }
+                if (!device) {
+                        fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
+                        rc = 4;
+                        goto exit;
+                }
+                print_device_chain(device);
+                break;
+        case ACTION_DEVICE_ID_FILE:
+                if (stat_device(name, export, export_prefix) != 0)
+                        rc = 1;
+                break;
+        }
+
+exit:
+        udev_device_unref(device);
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_info = {
+        .name = "info",
+        .cmd = uinfo,
+        .help = "query sysfs or the udev database",
+};