diff options
Diffstat (limited to 'udevinfo.c')
| -rw-r--r-- | udevinfo.c | 54 |
1 files changed, 39 insertions, 15 deletions
diff --git a/udevinfo.c b/udevinfo.c index fc45f7565d..3fc40faf14 100644 --- a/udevinfo.c +++ b/udevinfo.c @@ -206,6 +206,20 @@ out: return rc; } +static int stat_device(const char *name) +{ + struct stat statbuf; + + if (stat(name, &statbuf) != 0) + return -1; + + if (major(statbuf.st_dev) == 0) + return -1; + + printf("%d %d\n", major(statbuf.st_dev), minor(statbuf.st_dev)); + return 0; +} + int udevinfo(int argc, char *argv[], char *envp[]) { int option; @@ -219,6 +233,7 @@ int udevinfo(int argc, char *argv[], char *envp[]) { "attribute-walk", 0, NULL, 'a' }, { "export-db", 0, NULL, 'e' }, { "root", 0, NULL, 'r' }, + { "device-id-of-file", 1, NULL, 'd' }, { "version", 0, NULL, 1 }, /* -V outputs braindead format */ { "help", 0, NULL, 'h' }, {} @@ -229,6 +244,7 @@ int udevinfo(int argc, char *argv[], char *envp[]) ACTION_QUERY, ACTION_ATTRIBUTE_WALK, ACTION_ROOT, + ACTION_DEVICE_ID_FILE, } action = ACTION_NONE; enum query_type { @@ -256,7 +272,7 @@ int udevinfo(int argc, char *argv[], char *envp[]) } while (1) { - option = getopt_long(argc, argv, "aen:p:q:rVh", options, NULL); + option = getopt_long(argc, argv, "aed:n:p:q:rVh", options, NULL); if (option == -1) break; @@ -308,6 +324,10 @@ int udevinfo(int argc, char *argv[], char *envp[]) 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; @@ -322,20 +342,20 @@ int udevinfo(int argc, char *argv[], char *envp[]) goto exit; case 'h': printf("Usage: udevadm info OPTIONS\n" - " --query=<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" - " --path=<devpath> sysfs device path used for query or chain\n" - " --name=<name> node or symlink name used for query\n" - "\n" - " --root prepend to query result or print udev_root\n" - " --attribute-walk print all SYSFS_attributes along the device chain\n" - " --export-db export the content of the udev database\n" - " --help print this text\n" + " --query=<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" + " --path=<devpath> sysfs device path used for query or chain\n" + " --name=<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=<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: @@ -421,6 +441,10 @@ int udevinfo(int argc, char *argv[], char *envp[]) goto exit; } break; + case ACTION_DEVICE_ID_FILE: + if (stat_device(name) != 0) + rc = 6; + break; case ACTION_ROOT: printf("%s\n", udev_root); break; |