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110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/*
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* udev_utils.c - generic stuff used by udev
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*
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* Copyright (C) 2004, 2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <syslog.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/utsname.h>
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#include "udev_libc_wrapper.h"
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#include "udev.h"
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#include "logging.h"
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#include "udev_utils.h"
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#include "udev_sysfs.h"
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#include "list.h"
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int udev_init_device(struct udevice *udev, const char* devpath, const char *subsystem, const char *action)
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{
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char *pos;
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memset(udev, 0x00, sizeof(struct udevice));
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INIT_LIST_HEAD(&udev->symlink_list);
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INIT_LIST_HEAD(&udev->run_list);
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INIT_LIST_HEAD(&udev->env_list);
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if (subsystem)
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strlcpy(udev->subsystem, subsystem, sizeof(udev->subsystem));
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if (action)
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strlcpy(udev->action, action, sizeof(udev->action));
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if (devpath) {
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strlcpy(udev->devpath, devpath, sizeof(udev->devpath));
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remove_trailing_char(udev->devpath, '/');
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if (strncmp(udev->devpath, "/block/", 7) == 0)
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udev->type = DEV_BLOCK;
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else if (strncmp(udev->devpath, "/class/net/", 11) == 0)
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udev->type = DEV_NET;
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else if (strncmp(udev->devpath, "/class/", 7) == 0)
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udev->type = DEV_CLASS;
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else if (strncmp(udev->devpath, "/devices/", 9) == 0)
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udev->type = DEV_DEVICE;
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/* get kernel name */
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pos = strrchr(udev->devpath, '/');
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if (pos) {
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strlcpy(udev->kernel_name, &pos[1], sizeof(udev->kernel_name));
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dbg("kernel_name='%s'", udev->kernel_name);
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/* Some block devices have '!' in their name, change that to '/' */
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pos = udev->kernel_name;
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while (pos[0] != '\0') {
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if (pos[0] == '!')
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pos[0] = '/';
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pos++;
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}
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/* get kernel number */
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pos = &udev->kernel_name[strlen(udev->kernel_name)];
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while (isdigit(pos[-1]))
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pos--;
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strlcpy(udev->kernel_number, pos, sizeof(udev->kernel_number));
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dbg("kernel_number='%s'", udev->kernel_number);
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}
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}
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if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) {
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udev->mode = 0660;
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strcpy(udev->owner, "root");
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strcpy(udev->group, "root");
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}
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return 0;
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}
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void udev_cleanup_device(struct udevice *udev)
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{
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name_list_cleanup(&udev->symlink_list);
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name_list_cleanup(&udev->run_list);
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name_list_cleanup(&udev->env_list);
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}
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