2 * dev_d.c - dev.d/ multiplexer
4 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
12 * This essentially emulates the following shell script logic in C:
14 * export DEVNAME="whatever_dev_name_udev_just_gave"
15 * for I in "${DIR}/$DEVNAME/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
16 * if [ -f $I ]; then $I $1 ; fi
24 #include <sys/types.h>
35 #define DEVD_DIR "/etc/dev.d/"
36 #define DEVD_SUFFIX ".dev"
38 static int run_program(char *name)
44 dbg("running %s", name);
50 fd = open("/dev/null", O_RDWR);
52 dup2(fd, STDOUT_FILENO);
53 dup2(fd, STDIN_FILENO);
54 dup2(fd, STDERR_FILENO);
59 argv[1] = main_argv[1];
63 dbg("exec of child failed");
66 dbg("fork of child failed");
70 waitpid(pid, NULL, 0);
77 * runs files in these directories in order:
78 * <node name given by udev>/
82 void dev_d_execute(struct udevice *udev)
84 char dirname[PATH_MAX];
85 char devname[NAME_SIZE];
88 /* skip if UDEV_NO_DEVD is set */
92 /* skip if udev did nothing, like unchanged netif or no "dev" file */
93 if (udev->devname[0] == '\0')
96 /* add the node name or the netif name to the environment */
97 setenv("DEVNAME", udev->devname, 1);
98 dbg("DEVNAME='%s'", udev->devname);
100 strfieldcpy(devname, udev->name);
102 /* Chop the device name up into pieces based on '/' */
103 temp = strchr(devname, '/');
104 while (temp != NULL) {
106 strcpy(dirname, DEVD_DIR);
107 strfieldcat(dirname, devname);
108 call_foreach_file(run_program, dirname, DEVD_SUFFIX);
112 temp = strchr(temp, '/');
115 strcpy(dirname, DEVD_DIR);
116 strfieldcat(dirname, udev->name);
117 call_foreach_file(run_program, dirname, DEVD_SUFFIX);
119 strcpy(dirname, DEVD_DIR);
120 strfieldcat(dirname, udev->subsystem);
121 call_foreach_file(run_program, dirname, DEVD_SUFFIX);
123 strcpy(dirname, DEVD_DIR "default");
124 call_foreach_file(run_program, dirname, DEVD_SUFFIX);