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Commit | Line | Data |
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dd64e26b | 1 | /* |
4a539daf | 2 | * dev_d.c - dev.d/ multiplexer |
dd64e26b GKH |
3 | * |
4 | * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> | |
5 | * | |
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. | |
dd64e26b GKH |
9 | */ |
10 | ||
4a539daf | 11 | /* |
dd64e26b | 12 | * This essentially emulates the following shell script logic in C: |
4a539daf | 13 | * DIR="/etc/dev.d" |
4b06c852 | 14 | * export DEVNAME="whatever_dev_name_udev_just_gave" |
15 | * for I in "${DIR}/$DEVNAME/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do | |
4a539daf KS |
16 | * if [ -f $I ]; then $I $1 ; fi |
17 | * done | |
18 | * exit 1; | |
dd64e26b GKH |
19 | */ |
20 | ||
dd64e26b GKH |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/wait.h> | |
6e3e3c34 | 26 | #include <sys/stat.h> |
dd64e26b | 27 | #include <unistd.h> |
6e3e3c34 HH |
28 | #include <fcntl.h> |
29 | ||
dd64e26b GKH |
30 | #include "udev.h" |
31 | #include "udev_lib.h" | |
6e3e3c34 | 32 | #include "udevdb.h" |
dd64e26b GKH |
33 | #include "logging.h" |
34 | ||
4a539daf KS |
35 | #define DEVD_DIR "/etc/dev.d/" |
36 | #define DEVD_SUFFIX ".dev" | |
dd64e26b | 37 | |
4a539daf | 38 | static int run_program(char *name) |
dd64e26b GKH |
39 | { |
40 | pid_t pid; | |
6e3e3c34 | 41 | int fd; |
1059b07a | 42 | char *argv[3]; |
dd64e26b GKH |
43 | |
44 | dbg("running %s", name); | |
45 | ||
46 | pid = fork(); | |
4a539daf KS |
47 | switch (pid) { |
48 | case 0: | |
49 | /* child */ | |
6e3e3c34 HH |
50 | udevdb_exit(); /* close udevdb */ |
51 | fd = open("/dev/null", O_RDWR); | |
52 | if ( fd >= 0) { | |
53 | dup2(fd, STDOUT_FILENO); | |
54 | dup2(fd, STDIN_FILENO); | |
55 | dup2(fd, STDERR_FILENO); | |
56 | } | |
57 | close(fd); | |
1059b07a KS |
58 | |
59 | argv[0] = name; | |
60 | argv[1] = main_argv[1]; | |
61 | argv[2] = NULL; | |
62 | ||
63 | execv(name, argv); | |
4a539daf | 64 | dbg("exec of child failed"); |
5d24c6ca | 65 | _exit(1); |
4a539daf KS |
66 | case -1: |
67 | dbg("fork of child failed"); | |
68 | break; | |
69 | return -1; | |
70 | default: | |
e920fed3 | 71 | waitpid(pid, NULL, 0); |
dd64e26b GKH |
72 | } |
73 | ||
4a539daf | 74 | return 0; |
dd64e26b GKH |
75 | } |
76 | ||
4a539daf KS |
77 | /* |
78 | * runs files in these directories in order: | |
79 | * <node name given by udev>/ | |
80 | * subsystem/ | |
81 | * default/ | |
dd64e26b | 82 | */ |
5d24c6ca | 83 | void dev_d_execute(struct udevice *udev) |
dd64e26b | 84 | { |
5d24c6ca KS |
85 | char dirname[PATH_MAX]; |
86 | char devname[NAME_SIZE]; | |
a3e6c800 | 87 | char *temp; |
dd64e26b | 88 | |
5d24c6ca | 89 | /* skip if UDEV_NO_DEVD is set */ |
bbbe503e KS |
90 | if (udev_dev_d == 0) |
91 | return; | |
92 | ||
5d24c6ca KS |
93 | /* skip if udev did nothing, like unchanged netif or no "dev" file */ |
94 | if (udev->devname[0] == '\0') | |
a3e6c800 | 95 | return; |
5d24c6ca KS |
96 | |
97 | /* add the node name or the netif name to the environment */ | |
98 | setenv("DEVNAME", udev->devname, 1); | |
99 | dbg("DEVNAME='%s'", udev->devname); | |
100 | ||
101 | strfieldcpy(devname, udev->name); | |
a3e6c800 GKH |
102 | |
103 | /* Chop the device name up into pieces based on '/' */ | |
104 | temp = strchr(devname, '/'); | |
105 | while (temp != NULL) { | |
5d24c6ca | 106 | temp[0] = '\0'; |
a3e6c800 GKH |
107 | strcpy(dirname, DEVD_DIR); |
108 | strfieldcat(dirname, devname); | |
109 | call_foreach_file(run_program, dirname, DEVD_SUFFIX); | |
110 | ||
5d24c6ca | 111 | temp[0] = '/'; |
a3e6c800 GKH |
112 | ++temp; |
113 | temp = strchr(temp, '/'); | |
114 | } | |
dd64e26b | 115 | |
4a539daf | 116 | strcpy(dirname, DEVD_DIR); |
7a947ce5 | 117 | strfieldcat(dirname, udev->name); |
4a539daf | 118 | call_foreach_file(run_program, dirname, DEVD_SUFFIX); |
dd64e26b | 119 | |
4a539daf | 120 | strcpy(dirname, DEVD_DIR); |
7a947ce5 | 121 | strfieldcat(dirname, udev->subsystem); |
4a539daf | 122 | call_foreach_file(run_program, dirname, DEVD_SUFFIX); |
dd64e26b | 123 | |
4a539daf KS |
124 | strcpy(dirname, DEVD_DIR "default"); |
125 | call_foreach_file(run_program, dirname, DEVD_SUFFIX); | |
dd64e26b | 126 | } |