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/*
* 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;
char *argv[3];
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);
argv[0] = name;
argv[1] = main_argv[1];
argv[2] = NULL;
execv(name, 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 *udev)
{
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 (udev->type == 'b' || udev->type == 'c') {
strfieldcpy(env_devname, udev_root);
strfieldcat(env_devname, udev->name);
} else if (udev->type == 'n') {
strfieldcpy(env_devname, udev->name);
setenv("DEVPATH", udev->devpath, 1);
}
setenv("DEVNAME", env_devname, 1);
dbg("DEVNAME='%s'", env_devname);
devname = strdup(udev->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, udev->name);
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
strcpy(dirname, DEVD_DIR);
strfieldcat(dirname, udev->subsystem);
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
strcpy(dirname, DEVD_DIR "default");
call_foreach_file(run_program, dirname, DEVD_SUFFIX);
}
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