1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * BusyBox' main applet dispatcher.
|
---|
4 | *
|
---|
5 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
6 | */
|
---|
7 | #include "busybox.h"
|
---|
8 | #include <stdio.h>
|
---|
9 | #include <string.h>
|
---|
10 | #include <unistd.h>
|
---|
11 | #include <errno.h>
|
---|
12 | #include <stdlib.h>
|
---|
13 | #if ENABLE_LOCALE_SUPPORT
|
---|
14 | #include <locale.h>
|
---|
15 | #else
|
---|
16 | #define setlocale(x,y)
|
---|
17 | #endif
|
---|
18 |
|
---|
19 | const char *bb_applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
|
---|
20 |
|
---|
21 | #ifdef CONFIG_FEATURE_INSTALLER
|
---|
22 | /*
|
---|
23 | * directory table
|
---|
24 | * this should be consistent w/ the enum, busybox.h::Location,
|
---|
25 | * or else...
|
---|
26 | */
|
---|
27 | static const char usr_bin [] ="/usr/bin";
|
---|
28 | static const char usr_sbin[] ="/usr/sbin";
|
---|
29 |
|
---|
30 | static const char* const install_dir[] = {
|
---|
31 | &usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
|
---|
32 | &usr_bin [4], /* "/bin" */
|
---|
33 | &usr_sbin[4], /* "/sbin" */
|
---|
34 | usr_bin,
|
---|
35 | usr_sbin
|
---|
36 | };
|
---|
37 |
|
---|
38 | /* abstract link() */
|
---|
39 | typedef int (*__link_f)(const char *, const char *);
|
---|
40 |
|
---|
41 | /* create (sym)links for each applet */
|
---|
42 | static void install_links(const char *busybox, int use_symbolic_links)
|
---|
43 | {
|
---|
44 | __link_f Link = link;
|
---|
45 |
|
---|
46 | char *fpc;
|
---|
47 | int i;
|
---|
48 | int rc;
|
---|
49 |
|
---|
50 | if (use_symbolic_links)
|
---|
51 | Link = symlink;
|
---|
52 |
|
---|
53 | for (i = 0; applets[i].name != NULL; i++) {
|
---|
54 | fpc = concat_path_file(
|
---|
55 | install_dir[applets[i].location], applets[i].name);
|
---|
56 | rc = Link(busybox, fpc);
|
---|
57 | if (rc!=0 && errno!=EEXIST) {
|
---|
58 | bb_perror_msg("%s", fpc);
|
---|
59 | }
|
---|
60 | free(fpc);
|
---|
61 | }
|
---|
62 | }
|
---|
63 |
|
---|
64 | #else
|
---|
65 | #define install_links(x,y)
|
---|
66 | #endif /* CONFIG_FEATURE_INSTALLER */
|
---|
67 |
|
---|
68 | int main(int argc, char **argv)
|
---|
69 | {
|
---|
70 | const char *s;
|
---|
71 |
|
---|
72 | bb_applet_name=argv[0];
|
---|
73 | if (*bb_applet_name == '-') bb_applet_name++;
|
---|
74 | for (s = bb_applet_name; *s ;)
|
---|
75 | if (*(s++) == '/') bb_applet_name = s;
|
---|
76 |
|
---|
77 | /* Set locale for everybody except `init' */
|
---|
78 | if(ENABLE_LOCALE_SUPPORT && getpid() != 1)
|
---|
79 | setlocale(LC_ALL, "");
|
---|
80 |
|
---|
81 | run_applet_by_name(bb_applet_name, argc, argv);
|
---|
82 | bb_error_msg_and_die("applet not found");
|
---|
83 | }
|
---|
84 |
|
---|
85 | int busybox_main(int argc, char **argv)
|
---|
86 | {
|
---|
87 | /*
|
---|
88 | * This style of argument parsing doesn't scale well
|
---|
89 | * in the event that busybox starts wanting more --options.
|
---|
90 | * If someone has a cleaner approach, by all means implement it.
|
---|
91 | */
|
---|
92 | if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
|
---|
93 | int use_symbolic_links = 0;
|
---|
94 | int rc = 0;
|
---|
95 | char *busybox;
|
---|
96 |
|
---|
97 | /* to use symlinks, or not to use symlinks... */
|
---|
98 | if (argc > 2) {
|
---|
99 | if ((strcmp(argv[2], "-s") == 0)) {
|
---|
100 | use_symbolic_links = 1;
|
---|
101 | }
|
---|
102 | }
|
---|
103 |
|
---|
104 | /* link */
|
---|
105 | busybox = xreadlink("/proc/self/exe");
|
---|
106 | if (busybox) {
|
---|
107 | install_links(busybox, use_symbolic_links);
|
---|
108 | free(busybox);
|
---|
109 | } else {
|
---|
110 | rc = 1;
|
---|
111 | }
|
---|
112 | return rc;
|
---|
113 | }
|
---|
114 |
|
---|
115 | /* Deal with --help. (Also print help when called with no arguments) */
|
---|
116 |
|
---|
117 | if (argc==1 || !strcmp(argv[1],"--help") ) {
|
---|
118 | if (argc>2) {
|
---|
119 | run_applet_by_name(bb_applet_name=argv[2], 2, argv);
|
---|
120 | } else {
|
---|
121 | const struct BB_applet *a;
|
---|
122 | int col, output_width;
|
---|
123 |
|
---|
124 | if (ENABLE_FEATURE_AUTOWIDTH) {
|
---|
125 | /* Obtain the terminal width. */
|
---|
126 | get_terminal_width_height(0, &output_width, NULL);
|
---|
127 | /* leading tab and room to wrap */
|
---|
128 | output_width -= 20;
|
---|
129 | } else output_width = 60;
|
---|
130 |
|
---|
131 | printf("%s\n\n"
|
---|
132 | "Usage: busybox [function] [arguments]...\n"
|
---|
133 | " or: [function] [arguments]...\n\n"
|
---|
134 | "\tBusyBox is a multi-call binary that combines many common Unix\n"
|
---|
135 | "\tutilities into a single executable. Most people will create a\n"
|
---|
136 | "\tlink to busybox for each function they wish to use and BusyBox\n"
|
---|
137 | "\twill act like whatever it was invoked as!\n"
|
---|
138 | "\nCurrently defined functions:\n", bb_msg_full_version);
|
---|
139 |
|
---|
140 | col=0;
|
---|
141 | for(a = applets; a->name;) {
|
---|
142 | col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
|
---|
143 | if (col > output_width && a->name) {
|
---|
144 | printf(",\n");
|
---|
145 | col = 0;
|
---|
146 | }
|
---|
147 | }
|
---|
148 | printf("\n\n");
|
---|
149 | exit(0);
|
---|
150 | }
|
---|
151 | } else run_applet_by_name(argv[1], argc-1, argv+1);
|
---|
152 |
|
---|
153 | bb_error_msg_and_die("applet not found");
|
---|
154 | }
|
---|