127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
/*
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* dev.d multipleer
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*
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* Copyright (C) 2004 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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* Based on the klibc version of hotplug written by:
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* Author(s) Christian Borntraeger <cborntra@de.ibm.com>
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* which was based on the shell script written by:
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* Greg Kroah-Hartman <greg@kroah.com>
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*
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*/
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/*
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* This essentially emulates the following shell script logic in C:
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DIR="/etc/dev.d"
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export DEVNODE="whatever_dev_name_udev_just_gave"
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for I in "${DIR}/$DEVNODE/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
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if [ -f $I ]; then $I $1 ; fi
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done
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exit 1;
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*/
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#include <dirent.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "udev.h"
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#include "udev_lib.h"
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#include "logging.h"
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#define HOTPLUGDIR "/etc/dev.d"
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#define SUFFIX ".dev"
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#define COMMENT_PREFIX '#'
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static void run_program(char *name)
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{
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pid_t pid;
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dbg("running %s", name);
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pid = fork();
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if (pid < 0) {
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perror("fork");
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return;
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}
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if (pid > 0) {
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wait(NULL);
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return;
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}
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execv(name, main_argv);
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exit(1);
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}
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static void execute_dir (char *dirname)
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{
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DIR *directory;
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struct dirent *entry;
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char filename[NAME_SIZE];
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int name_len;
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dbg("opening %s", dirname);
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directory = opendir(dirname);
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if (!directory)
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return;
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while ((entry = readdir(directory))) {
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if (entry->d_name[0] == '\0')
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break;
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/* Don't run the files '.', '..', or hidden files,
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* or files that start with a '#' */
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if ((entry->d_name[0] == '.') ||
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(entry->d_name[0] == COMMENT_PREFIX))
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continue;
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/* Nor do we run files that do not end in ".dev" */
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name_len = strlen(entry->d_name);
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if (name_len < strlen(SUFFIX))
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continue;
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if (strcmp(&entry->d_name[name_len - sizeof (SUFFIX) + 1], SUFFIX) != 0)
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continue;
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/* FIXME - need to use file_list_insert() here to run these in sorted order... */
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snprintf(filename, sizeof(filename), "%s%s", dirname, entry->d_name);
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filename[sizeof(filename)-1] = '\0';
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run_program(filename);
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}
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closedir(directory);
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}
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/* runs files in these directories in order:
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* name given by udev
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* subsystem
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* default
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*/
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void dev_d_send(struct udevice *dev, char *subsystem)
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{
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char dirname[256];
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char devnode[NAME_SIZE];
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strfieldcpy(devnode, udev_root);
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strfieldcat(devnode, dev->name);
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setenv("DEVNODE", devnode, 1);
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snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", dev->name);
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dirname[sizeof(dirname)-1] = '\0';
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execute_dir(dirname);
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snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", subsystem);
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dirname[sizeof(dirname)-1] = '\0';
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execute_dir(dirname);
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strcpy(dirname, HOTPLUGDIR "/default/");
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execute_dir(dirname);
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}
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