diff options
Diffstat (limited to 'extras/udevinfo')
| -rw-r--r-- | extras/udevinfo/Makefile | 14 | ||||
| -rw-r--r-- | extras/udevinfo/udevinfo.c | 132 |
2 files changed, 146 insertions, 0 deletions
diff --git a/extras/udevinfo/Makefile b/extras/udevinfo/Makefile new file mode 100644 index 0000000000..f31c8c11e9 --- /dev/null +++ b/extras/udevinfo/Makefile @@ -0,0 +1,14 @@ +PROG=udevinfo +LD=$(CC) +OBJS=udevinfo.o + +all: $(PROG) + +clean: + rm -f $(PROG) $(OBJS) + +$(PROG): $(OBJS) + $(LD) $(LDFLAGS) -o $(PROG) $(CRT0) $(OBJS) $(SYSFS) + +me: + cd ../..; make EXTRAS=extras/udevinfo diff --git a/extras/udevinfo/udevinfo.c b/extras/udevinfo/udevinfo.c new file mode 100644 index 0000000000..4f229cd376 --- /dev/null +++ b/extras/udevinfo/udevinfo.c @@ -0,0 +1,132 @@ +/* + * udevinfo - fetches attributes for a device + * + * Copyright (C) 2004 Kay Sievers <kay.sievers@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 version 2 of the License. + * + * 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, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <stdlib.h> +#include <string.h> +#include <stdio.h> + +#include "libsysfs.h" + + +# define VALUE_SIZE 200 + +char **main_argv; +char **main_envp; + +static int print_all_attributes(char *path) +{ + struct dlist *attributes; + struct sysfs_attribute *attr; + struct sysfs_directory *sysfs_dir; + char value[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) { + strncpy(value, attr->value, VALUE_SIZE); + len = strlen(value); + if (value[len-1] == '\n') + value[len-1] = '\0'; + printf(" SYSFS_%s=\"%s\"\n", attr->name, value); + } + } + printf("\n"); + +exit: + sysfs_close_directory(sysfs_dir); + + return retval; +} + +int main(int argc, char **argv, char **envp) +{ + main_argv = argv; + main_envp = envp; + struct sysfs_class_device *class_dev; + struct sysfs_class_device *class_dev_parent; + struct sysfs_attribute *attr; + struct sysfs_device *sysfs_device; + char *path; + int retval = 0; + + if (argc != 2) { + printf("Usage: udevinfo <sysfs_device_path>\n"); + return -1; + } + path = argv[1]; + + /* 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; + } + + /* read the 'dev' file for major/minor*/ + attr = sysfs_get_classdev_attr(class_dev, "dev"); + if (attr == NULL) { + printf("couldn't get the \"dev\" file\n"); + retval = -1; + goto exit; + } + printf("\ndevice '%s' has major:minor %s\n", class_dev->path, attr->value); + sysfs_close_attribute(attr); + + /* 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; + } + + /* get the device (if parent exists use it instead) */ + class_dev_parent = sysfs_get_classdev_parent(class_dev); + if (class_dev_parent != NULL) { + //sysfs_close_class_device(class_dev); + class_dev = class_dev_parent; + } + sysfs_device = sysfs_get_classdev_device(class_dev); + if (sysfs_device != NULL) { + printf("follow class device's \"device\" link '%s':\n", class_dev->path); + printf(" BUS=\"%s\"\n", sysfs_device->bus); + printf(" ID=\"%s\"\n", sysfs_device->bus_id); + + /* open sysfs device directory and print all attributes */ + print_all_attributes(sysfs_device->path); + sysfs_close_device(sysfs_device); + } + +exit: + //sysfs_close_class_device(class_dev); + return retval; +} |