udevadm,..: make --help output of udev tools more like the output of the various...

[elogind.git] / src / udev / udevadm-info.c

diff --git a/src/udev/udevadm-info.c b/src/udev/udevadm-info.c
index 22d082601119c06528cdf52cd55671ac7b619310..f52a03dfd022cda50a0afce02558b8067c53d504 100644 (file)
--- a/src/udev/udevadm-info.c
+++ b/src/udev/udevadm-info.c
@@ -31,6 +31,7 @@
 
 #include "udev.h"
 #include "udev-util.h"
+#include "udevadm-util.h"
 
 static bool skip_attribute(const char *name) {
         static const char* const skip[] = {
@@ -257,33 +258,29 @@ 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)) {
-                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 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[]) {
@@ -311,27 +308,6 @@ static int uinfo(struct udev *udev, int argc, char *argv[]) {
                 {}
         };
 
-        static const char *usage =
-                "Usage: udevadm info [OPTIONS] [DEVPATH|FILE]\n"
-                " -q,--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"
-                " -p,--path=SYSPATH           sys 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             cleanup the udev database\n"
-                "    --version                print version of the program\n"
-                " -h,--help                   print this message\n";
-
         enum action_type {
                 ACTION_QUERY,
                 ACTION_ATTRIBUTE_WALK,
@@ -416,7 +392,7 @@ static int uinfo(struct udev *udev, int argc, char *argv[]) {
                         printf("%s\n", VERSION);
                         return 0;
                 case 'h':
-                        printf("%s\n", usage);
+                        help();
                         return 0;
                 default:
                         return 1;
@@ -426,7 +402,7 @@ static int uinfo(struct udev *udev, int argc, char *argv[]) {
         case ACTION_QUERY:
                 if (!device) {
                         if (!argv[optind]) {
-                                fprintf(stderr, "%s\n", usage);
+                                help();
                                 return 2;
                         }
                         device = find_device(udev, argv[optind], NULL);
@@ -517,5 +493,5 @@ static int uinfo(struct udev *udev, int argc, char *argv[]) {
 const struct udevadm_cmd udevadm_info = {
         .name = "info",
         .cmd = uinfo,
-        .help = "query sysfs or the udev database",
+        .help = "Query sysfs or the udev database",
 };