mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-10-30 14:55:26 +03:00
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
|
|
* dev_d.c - dev.d/ multiplexer
|
|
*
|
|
* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
|
|
*
|
|
* 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 essentially emulates the following shell script logic in C:
|
|
* DIR="/etc/dev.d"
|
|
* export DEVNAME="whatever_dev_name_udev_just_gave"
|
|
* for I in "${DIR}/$DEVNAME/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
|
|
* if [ -f $I ]; then $I $1 ; fi
|
|
* done
|
|
* exit 1;
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "udev.h"
|
|
#include "udev_lib.h"
|
|
#include "udevdb.h"
|
|
#include "logging.h"
|
|
|
|
#define DEVD_DIR "/etc/dev.d/"
|
|
#define DEVD_SUFFIX ".dev"
|
|
|
|
static int run_program(char *name)
|
|
{
|
|
pid_t pid;
|
|
int fd;
|
|
|
|
dbg("running %s", name);
|
|
|
|
pid = fork();
|
|
switch (pid) {
|
|
case 0:
|
|
/* child */
|
|
udevdb_exit(); /* close udevdb */
|
|
fd = open("/dev/null", O_RDWR);
|
|
if ( fd >= 0) {
|
|
dup2(fd, STDOUT_FILENO);
|
|
dup2(fd, STDIN_FILENO);
|
|
dup2(fd, STDERR_FILENO);
|
|
}
|
|
close(fd);
|
|
execv(name, main_argv);
|
|
dbg("exec of child failed");
|
|
exit(1);
|
|
case -1:
|
|
dbg("fork of child failed");
|
|
break;
|
|
return -1;
|
|
default:
|
|
wait(NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* runs files in these directories in order:
|
|
* <node name given by udev>/
|
|
* subsystem/
|
|
* default/
|
|
*/
|
|
void dev_d_send(struct udevice *dev, const char *subsystem, const char *devpath)
|
|
{
|
|
char dirname[256];
|
|
char env_devname[NAME_SIZE];
|
|
char *devname;
|
|
char *temp;
|
|
|
|
if (udev_dev_d == 0)
|
|
return;
|
|
|
|
memset(env_devname, 0x00, sizeof(env_devname));
|
|
if (dev->type == 'b' || dev->type == 'c') {
|
|
strfieldcpy(env_devname, udev_root);
|
|
strfieldcat(env_devname, dev->name);
|
|
} else if (dev->type == 'n') {
|
|
strfieldcpy(env_devname, dev->name);
|
|
setenv("DEVPATH", devpath, 1);
|
|
}
|
|
setenv("DEVNAME", env_devname, 1);
|
|
dbg("DEVNAME='%s'", env_devname);
|
|
|
|
devname = strdup(dev->name);
|
|
if (!devname) {
|
|
dbg("out of memory");
|
|
return;
|
|
}
|
|
|
|
/* Chop the device name up into pieces based on '/' */
|
|
temp = strchr(devname, '/');
|
|
while (temp != NULL) {
|
|
*temp = 0x00;
|
|
strcpy(dirname, DEVD_DIR);
|
|
strfieldcat(dirname, devname);
|
|
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
|
|
|
|
*temp = '/';
|
|
++temp;
|
|
temp = strchr(temp, '/');
|
|
}
|
|
|
|
strcpy(dirname, DEVD_DIR);
|
|
strfieldcat(dirname, dev->name);
|
|
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
|
|
|
|
strcpy(dirname, DEVD_DIR);
|
|
strfieldcat(dirname, subsystem);
|
|
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
|
|
|
|
strcpy(dirname, DEVD_DIR "default");
|
|
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
|
|
}
|