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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 <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_lib.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;
}
char get_device_type(const char *path, const char *subsystem)
{
if (strcmp(subsystem, "block") == 0 ||
strstr(path, "/block/") != NULL)
return 'b';
if (strcmp(subsystem, "net") == 0 ||
strstr(path, "/class/net/") != NULL)
return 'n';
if (strstr(path, "/class/") != NULL)
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;
}
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