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authorKay Sievers <kay@vrfy.org>2012-06-10 20:53:07 (GMT)
committerKay Sievers <kay@vrfy.org>2012-06-10 20:53:07 (GMT)
commit4f5d327a49e1a40ae0a3b8f1855dc90f3c0d953f (patch)
tree2ec8c673cc428ad1f40c2dde5379b1b17198fe05
parent94f7a71442bda7c43191979ea13cc97112745ce4 (diff)
udev: support "udevadm info /dev/sda; udevadm info /sys/class/block/sda"
-rw-r--r--man/udevadm.xml11
-rw-r--r--src/udev/udevadm-info.c161
2 files changed, 85 insertions, 87 deletions
diff --git a/man/udevadm.xml b/man/udevadm.xml
index cbf22b4..d0cd922 100644
--- a/man/udevadm.xml
+++ b/man/udevadm.xml
@@ -116,15 +116,8 @@
<varlistentry>
<term><option>--root</option></term>
<listitem>
- <para>The udev root directory: <filename>/dev</filename>. If used in conjunction
- with a <command>name</command> or <command>symlink</command> query, the
- query returns the absolute path including the root directory.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--run</option></term>
- <listitem>
- <para>The udev runtime directory: <filename>/run/udev</filename>.</para>
+ <para>Print absolute paths in <command>name</command> or <command>symlink</command>
+ query.</para>
</listitem>
</varlistentry>
<varlistentry>
diff --git a/src/udev/udevadm-info.c b/src/udev/udevadm-info.c
index 229c0a2..907e961 100644
--- a/src/udev/udevadm-info.c
+++ b/src/udev/udevadm-info.c
@@ -264,13 +264,42 @@ static void cleanup_db(struct udev *udev)
}
}
+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 path[UTIL_PATH_SIZE];
char name[UTIL_PATH_SIZE];
struct udev_list_entry *list_entry;
int rc = 0;
@@ -283,7 +312,6 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
{ "cleanup-db", no_argument, NULL, 'c' },
{ "export-db", no_argument, NULL, 'e' },
{ "root", no_argument, NULL, 'r' },
- { "run", no_argument, NULL, 'R' },
{ "device-id-of-file", required_argument, NULL, 'd' },
{ "export", no_argument, NULL, 'x' },
{ "export-prefix", required_argument, NULL, 'P' },
@@ -292,83 +320,73 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
{}
};
+ 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_NONE,
ACTION_QUERY,
ACTION_ATTRIBUTE_WALK,
- ACTION_ROOT,
ACTION_DEVICE_ID_FILE,
- } action = ACTION_NONE;
+ } action = ACTION_QUERY;
enum query_type {
- QUERY_NONE,
QUERY_NAME,
QUERY_PATH,
QUERY_SYMLINK,
QUERY_PROPERTY,
QUERY_ALL,
- } query = QUERY_NONE;
+ } query = QUERY_ALL;
for (;;) {
int option;
- struct stat statbuf;
option = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL);
if (option == -1)
break;
switch (option) {
- case 'n':
+ case 'n': {
if (device != NULL) {
fprintf(stderr, "device already specified\n");
rc = 2;
goto exit;
}
- /* add /dev if not given */
- if (!startswith(optarg, "/dev"))
- util_strscpyl(name, sizeof(name), "/dev/", optarg, NULL);
- else
- util_strscpy(name, sizeof(name), optarg);
- util_remove_trailing_chars(name, '/');
- if (stat(name, &statbuf) < 0) {
+
+ device = find_device(udev, optarg, "/dev/");
+ if (device == NULL) {
fprintf(stderr, "device node not found\n");
rc = 2;
goto exit;
- } else {
- char type;
-
- if (S_ISBLK(statbuf.st_mode)) {
- type = 'b';
- } else if (S_ISCHR(statbuf.st_mode)) {
- type = 'c';
- } else {
- fprintf(stderr, "device node has wrong file type\n");
- rc = 2;
- goto exit;
- }
- device = udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
- 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;
}
- /* add sys dir if needed */
- if (!startswith(optarg, "/sys"))
- util_strscpyl(path, sizeof(path), "/sys", optarg, NULL);
- else
- util_strscpy(path, sizeof(path), optarg);
- util_remove_trailing_chars(path, '/');
- device = udev_device_new_from_syspath(udev, path);
+
+ device = find_device(udev, optarg, "/sys");
if (device == NULL) {
- fprintf(stderr, "device path not found\n");
+ fprintf(stderr, "syspath not found\n");
rc = 2;
goto exit;
}
@@ -392,13 +410,8 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
}
break;
case 'r':
- if (action == ACTION_NONE)
- action = ACTION_ROOT;
root = true;
break;
- case 'R':
- printf("/run/udev\n");
- goto exit;
case 'd':
action = ACTION_DEVICE_ID_FILE;
util_strscpy(name, sizeof(name), optarg);
@@ -422,24 +435,7 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
printf("%s\n", VERSION);
goto exit;
case 'h':
- printf("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\n");
+ printf("%s\n", usage);
goto exit;
default:
rc = 1;
@@ -449,10 +445,18 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
switch (action) {
case ACTION_QUERY:
- if (device == NULL) {
- fprintf(stderr, "query needs a valid device specified by --path= or --name=\n");
- rc = 4;
- goto exit;
+ 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) {
@@ -513,8 +517,16 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
}
break;
case ACTION_ATTRIBUTE_WALK:
- if (device == NULL) {
- fprintf(stderr, "query needs a valid device specified by --path= or --name=\n");
+ 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;
}
@@ -524,13 +536,6 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
if (stat_device(name, export, export_prefix) != 0)
rc = 1;
break;
- case ACTION_ROOT:
- printf("/dev\n");
- break;
- default:
- fprintf(stderr, "missing option\n");
- rc = 1;
- break;
}
exit: