127 lines
2.6 KiB
C
127 lines
2.6 KiB
C
/*
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* dev_d.c - dev.d/ multiplexer
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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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/*
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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 DEVNAME="whatever_dev_name_udev_just_gave"
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* for I in "${DIR}/$DEVNAME/"*.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 <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 <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "udev.h"
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#include "udev_lib.h"
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#include "udevdb.h"
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#include "logging.h"
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#define DEVD_DIR "/etc/dev.d/"
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#define DEVD_SUFFIX ".dev"
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static int run_program(char *name)
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{
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pid_t pid;
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int fd;
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char *argv[3];
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dbg("running %s", name);
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pid = fork();
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switch (pid) {
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case 0:
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/* child */
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udevdb_exit(); /* close udevdb */
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fd = open("/dev/null", O_RDWR);
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if ( fd >= 0) {
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDERR_FILENO);
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}
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close(fd);
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argv[0] = name;
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argv[1] = main_argv[1];
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argv[2] = NULL;
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execv(name, argv);
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dbg("exec of child failed");
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_exit(1);
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case -1:
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dbg("fork of child failed");
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break;
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return -1;
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default:
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waitpid(pid, NULL, 0);
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}
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return 0;
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}
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/*
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* runs files in these directories in order:
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* <node 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_execute(struct udevice *udev)
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{
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char dirname[PATH_MAX];
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char devname[NAME_SIZE];
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char *temp;
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/* skip if UDEV_NO_DEVD is set */
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if (udev_dev_d == 0)
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return;
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/* skip if udev did nothing, like unchanged netif or no "dev" file */
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if (udev->devname[0] == '\0')
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return;
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/* add the node name or the netif name to the environment */
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setenv("DEVNAME", udev->devname, 1);
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dbg("DEVNAME='%s'", udev->devname);
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strfieldcpy(devname, udev->name);
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/* Chop the device name up into pieces based on '/' */
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temp = strchr(devname, '/');
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while (temp != NULL) {
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temp[0] = '\0';
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, devname);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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temp[0] = '/';
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++temp;
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temp = strchr(temp, '/');
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}
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, udev->name);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, udev->subsystem);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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strcpy(dirname, DEVD_DIR "default");
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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}
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