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https://github.com/AuxXxilium/eudev.git
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9fe3f9a938
Here I try to cleanup our various multifield iteration over the strings.
Inspired by our nice list.h we now have a macro to iterate over the string
and process the parts of it:
It makes the code more readable and we don't change the string while we
process it like the former strsep() does.
Example:
foreach_strpart(dev->symlink, " ", pos, len) {
if (strncmp(&dev->symlink[pos], find_name, len) != 0)
continue;
...
}
For the callout part selector %c{2} we separate now not only by space but
also newline and return characters, cause some programs may give multiline
values back. A possible RESULT match must contain wildcards for these
characters.
Also a bug in the recent udevinfo symlink query feature is fixed.
165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
/*
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* udev.h
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*
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* Userspace devfs
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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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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#ifndef UDEV_H
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#define UDEV_H
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#include <stdlib.h>
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#include <string.h>
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#include <sysfs/libsysfs.h>
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#include <stddef.h>
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#include <sys/param.h>
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#define COMMENT_CHARACTER '#'
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#define NAME_SIZE 100
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#define OWNER_SIZE 30
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#define GROUP_SIZE 30
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#define MODE_SIZE 8
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#define ACTION_SIZE 30
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#define DEVPATH_SIZE 255
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#define SUBSYSTEM_SIZE 30
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/* length of public data */
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#define UDEVICE_LEN (offsetof(struct udevice, bus_id))
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struct udevice {
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char name[NAME_SIZE];
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char owner[OWNER_SIZE];
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char group[GROUP_SIZE];
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char type;
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int major;
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int minor;
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unsigned int mode; /* not mode_t due to conflicting definitions in different libcs */
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char symlink[NAME_SIZE];
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int partitions;
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/* private data that help us in building strings */
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char bus_id[SYSFS_NAME_LEN];
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char program_result[NAME_SIZE];
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char kernel_number[NAME_SIZE];
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char kernel_name[NAME_SIZE];
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};
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#define strfieldcpy(to, from) \
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do { \
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to[sizeof(to)-1] = '\0'; \
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strncpy(to, from, sizeof(to)-1); \
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} while (0)
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#define strfieldcat(to, from) \
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do { \
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to[sizeof(to)-1] = '\0'; \
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strncat(to, from, sizeof(to) - strlen(to)-1); \
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} while (0)
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#define strnfieldcpy(to, from, maxsize) \
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do { \
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to[maxsize-1] = '\0'; \
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strncpy(to, from, maxsize-1); \
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} while (0)
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#define strnfieldcat(to, from, maxsize) \
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do { \
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to[maxsize-1] = '\0'; \
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strncat(to, from, maxsize - strlen(to)-1); \
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} while (0)
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#define strintcat(to, i) \
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do { \
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to[sizeof(to)-1] = '\0'; \
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snprintf((to) + strlen(to), sizeof(to) - strlen(to)-1, "%u", i); \
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} while (0)
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#define strnintcat(to, i, maxsize) \
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do { \
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to[maxsize-1] = '\0'; \
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snprintf((to) + strlen(to), maxsize - strlen(to)-1, "%u", i); \
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} while (0)
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#define foreach_strpart(str, separator, pos, len) \
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for(pos = 0, len = strcspn(str, separator); \
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(pos) < strlen(str); \
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pos = pos + (len) + 1, len = strcspn((str) + pos, separator)) \
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if (len > 0)
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static inline char *get_action(void)
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{
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char *action;
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action = getenv("ACTION");
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if (action != NULL && strlen(action) > ACTION_SIZE)
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action[ACTION_SIZE-1] = '\0';
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return action;
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}
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static inline char *get_devpath(void)
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{
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char *devpath;
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devpath = getenv("DEVPATH");
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if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE)
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devpath[DEVPATH_SIZE-1] = '\0';
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return devpath;
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}
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static inline char *get_seqnum(void)
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{
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char *seqnum;
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seqnum = getenv("SEQNUM");
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return seqnum;
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}
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static inline char *get_subsystem(char *subsystem)
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{
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if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE)
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subsystem[SUBSYSTEM_SIZE-1] = '\0';
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return subsystem;
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}
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extern int udev_add_device(char *path, char *subsystem, int fake);
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extern int udev_remove_device(char *path, char *subsystem);
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extern void udev_init_config(void);
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extern int parse_get_pair(char **orig_string, char **left, char **right);
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extern char **main_argv;
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extern char **main_envp;
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extern char sysfs_path[SYSFS_PATH_MAX];
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extern char udev_root[PATH_MAX];
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extern char udev_db_filename[PATH_MAX+NAME_MAX];
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extern char udev_permissions_filename[PATH_MAX+NAME_MAX];
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extern char udev_config_filename[PATH_MAX+NAME_MAX];
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extern char udev_rules_filename[PATH_MAX+NAME_MAX];
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extern char default_mode_str[MODE_SIZE];
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extern char default_owner_str[OWNER_SIZE];
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extern char default_group_str[GROUP_SIZE];
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extern int udev_log;
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extern int udev_sleep;
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#endif
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