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/*
* udev_lib - generic stuff used by udev
*
* Copyright (C) 2004 Kay Sievers <kay@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 <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "logging.h"
#include "udev_lib.h"
#include "list.h"
char *get_action(void)
{
char *action;
action = getenv("ACTION");
if (action != NULL && strlen(action) > ACTION_SIZE)
action[ACTION_SIZE-1] = '\0';
return action;
}
char *get_devpath(void)
{
char *devpath;
devpath = getenv("DEVPATH");
if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE)
devpath[DEVPATH_SIZE-1] = '\0';
return devpath;
}
char *get_devnode(void)
{
char *devnode;
devnode = getenv("DEVNODE");
if (devnode != NULL && strlen(devnode) > NAME_SIZE)
devnode[NAME_SIZE-1] = '\0';
return devnode;
}
char *get_seqnum(void)
{
char *seqnum;
seqnum = getenv("SEQNUM");
return seqnum;
}
char *get_subsystem(char *subsystem)
{
if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE)
subsystem[SUBSYSTEM_SIZE-1] = '\0';
return subsystem;
}
#define BLOCK_PATH "/block/"
#define CLASS_PATH "/class/"
#define NET_PATH "/class/net/"
char get_device_type(const char *path, const char *subsystem)
{
if (strcmp(subsystem, "block") == 0)
return 'b';
if (strcmp(subsystem, "net") == 0)
return 'n';
if (strncmp(path, BLOCK_PATH, strlen(BLOCK_PATH)) == 0 &&
strlen(path) > strlen(BLOCK_PATH))
return 'b';
if (strncmp(path, NET_PATH, strlen(NET_PATH)) == 0 &&
strlen(path) > strlen(NET_PATH))
return 'n';
if (strncmp(path, CLASS_PATH, strlen(CLASS_PATH)) == 0 &&
strlen(path) > strlen(CLASS_PATH))
return 'c';
return '\0';
}
int file_map(const char *filename, char **buf, size_t *bufsize)
{
struct stat stats;
int fd;
fd = open(filename, O_RDONLY);
if (fd < 0) {
return -1;
}
if (fstat(fd, &stats) < 0) {
return -1;
}
*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (*buf == MAP_FAILED) {
return -1;
}
*bufsize = stats.st_size;
close(fd);
return 0;
}
void file_unmap(char *buf, size_t bufsize)
{
munmap(buf, bufsize);
}
size_t buf_get_line(char *buf, size_t buflen, size_t cur)
{
size_t count = 0;
for (count = cur; count < buflen && buf[count] != '\n'; count++);
return count - cur;
}
struct files {
struct list_head list;
char name[NAME_SIZE];
};
/* sort files in lexical order */
static int file_list_insert(char *filename, struct list_head *file_list)
{
struct files *loop_file;
struct files *new_file;
list_for_each_entry(loop_file, file_list, list) {
if (strcmp(loop_file->name, filename) > 0) {
break;
}
}
new_file = malloc(sizeof(struct files));
if (new_file == NULL) {
dbg("error malloc");
return -ENOMEM;
}
strfieldcpy(new_file->name, filename);
list_add_tail(&new_file->list, &loop_file->list);
return 0;
}
/* calls function for file or every file found in directory */
int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix)
{
struct dirent *ent;
DIR *dir;
char *ext;
char file[NAME_SIZE];
struct files *loop_file;
struct files *tmp_file;
LIST_HEAD(file_list);
dbg("open directory '%s'", dirname);
dir = opendir(dirname);
if (dir == NULL) {
dbg("unable to open '%s'", dirname);
return -1;
}
while (1) {
ent = readdir(dir);
if (ent == NULL || ent->d_name[0] == '\0')
break;
if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
continue;
/* look for file with specified suffix */
ext = strrchr(ent->d_name, '.');
if (ext == NULL)
continue;
if (strcmp(ext, suffix) != 0)
continue;
dbg("put file '%s/%s' in list", dirname, ent->d_name);
file_list_insert(ent->d_name, &file_list);
}
/* call function for every file in the list */
list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
strfieldcpy(file, dirname);
strfieldcat(file, "/");
strfieldcat(file, loop_file->name);
fnct(file);
list_del(&loop_file->list);
free(loop_file);
}
closedir(dir);
return 0;
}
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